132results about How to "In situ repair" patented technology

The invention discloses slow-release fertilizer with the effect of soil remediation, which is prepared by polyhydroxyalkanoates which can be completely biodegraded, organic and inorganic nutrients and other substances, by slow-releasing the organic and inorganic nutrients, microorganism propagation and sustained and rapid growth of plants can be promoted, the bioactivity and water solubility of polycyclic aromatic hydrocarbons are quickened, and simultaneously, the defects of fertilizer loss and repeated fertilization can be avoided, thereby saving the cost and enhancing the soil remediation efficiency. The invention also discloses a soil pollution remediation method by utilizing the slow-release fertilizer, plants with the remediation effect are planted in the soil with the slow-release fertilizer, and efficient, environment-friendly and sustained remediation of the soil polluted by the polycyclic aromatic hydrocarbons (PAHs) can be realized by utilizing the microorganism-plant remediation technology.

The invention discloses a multivariate controllable synthesis method of a BiOCl photocatalyst, and belongs to the technical field of photocatalytic water treatment of environmental chemical engineering. The multivariate controllable synthesis method is characterized by comprising the following steps: adding BiCl3 with proper concentration to diethylene glycol or a mixed solvent of diethylene glycol and water; adding a urea precipitation agent, directly transferring sol or transferring sol subjected to ultrasonic pretreatment into a Teflon high-pressure reaction kettle to carry out solvothermal reaction at certain temperature to generate sediments after evenly mixing; and baking the sediments at 80 DEG C after washing with water and ethanol, so as to obtain BiOCl photocatalyst powder with different morphologies. The synthesis method disclosed by the invention has the characteristics that the preparation cycle of BiOCl is short, use of a surfactant is avoided, grains with controllable crystal faces (110 and 102) and controllable morphologies (two-dimensional flakes, three-dimensional flowers or spheres) can be conveniently achieved by controlling and ultrasonic pretreatment on the solvent. The catalyst is applied to photocatalytic degradation of carbamazepine medicine wastewater, displays the photocatalytic activity superior to that of TiO2(P25) under ultraviolet light and simulated sunlight, and has a practical application prospect.

The invention relates to the technical field of pollution repairing and treatment of organic pollutants in soil, and especially discloses a chemically repairing method used in soil polluted by nitrobenzene, nitrochlorobenzene and the like. By means of the method in which the nitrobenzene, the nitrochlorobenzene and the like are firstly reduced into phenylamine which is easy to oxidatively degrade with zero-valent iron and finally the degraded product is oxidized to generate carbon dioxide and water, the soil, which is polluted by the organic pollutants including the nitrobenzene and the like, is completely repaired and removal efficiency of the organic pollutants is increased. The method can achieve a removal rate of the nitrochlorobenzene being 88.3-95.8%, wherein the nitrochlorobenzene is a difficultly-degraded organic substance. The method can overcome problems of low removal efficiency, high medicine cost and troublesome follow-up treatment during removal of the nitrobenzene-series organic pollutants in the soil with Fenton reagents, potassium persulfate, sodium permanganate and the like which are common in the prior art. By means of an indirectly oxidative degradation in which reduction is carried out firstly and oxidization is carried out after that, usage amount of an oxidizing agent can be reduced and the removal rate of the nitrobenzene-series organic pollutants can be increased. Meanwhile, the method is simple in operation and can avoid secondary pollution to environment by the oxidizing agent. The method can effectively achieve in-situ repairing of polluted soil and is especially suitable for complete repair of the soil severely polluted by the organic pollutants in local factory removal.

The invention relates to a preparation method of floating embedding bacterium agents for in-situ remediation of oil polluted water, specifically relating to a technology for fixing oil degradation bacteria by using expanded graphite, sodium alginate and calcium chloride, absorbing and degrading to purify the petroleum polluted water. The preparation method of the floating embedding bacterium agents comprises the following steps: adding petroleum degrading bacteria liquid into sodium alginate sol containing the expanded graphite, mixing uniformly, dropping into calcium chloride solution and cross-linking overnight at 4 degrees centigrade to obtain the floating embedding bacterium agents fixing hydrocarbon degradation bacteria. The floating embedding bacterium agents prepared by the preparation method has the advantages of high mechanical strength, good floatability and mass transfer performance and high degradation efficiency; the floating embedding bacterium agents can be directly put onto the surface of the petroleum polluted water; the embedding bacterium agents can float on an oil-water interface for long term so as to ensure effective contact between the bacterium agent and the petroleum; the embedding technology increases the concentration of microorganisms, prevents the bacteria influencing by the water using environment, effectively improves the degradation efficiency, recovers and recycles conveniently and has no secondary pollution risk.

The invention discloses a drill pipe device for mixed injection of various medicaments. The drill pipe device comprises an outer pipe, an inner pipe and a drill bit. Both the outer pipe and the inner pipe are of hollow structure and sleeved together, and a gap between the outer pipe and the inner pipe forms a first cavity. The upper portion of the outer pipe is provided with a first medicament connecting hole which is communicated with the first cavity. The inner wall of the bottom of the outer pipe is provided with a step, and the first cavity is closed by the step and the outer wall of the inner pipe together. The upper portion of the inner pipe is provided with a second medicament connecting hole which is communicated with a cavity of the inner pipe. The drill bit is connected with the outer pipe, and a second cavity is formed inside the drill bit and is communicated with the cavity of the inner pipe. Jet holes communicated with the outside are respectively formed in the side walls of the first cavity and the second cavity. The drill pipe device for injection in situ of soil and underground water realizes underground mixing of various medicaments, reduces interaction consumption before the medicaments contact with pollutants, and improves effect of in-situ repair.

The invention provides a method for preparing a solid repair agent by using protein peptide and repairing soil by using the soil repair agent. The method comprises the steps of: preparing the protein peptide prepared by using a method in the patent ZL200610019063.7 or the protein peptide prepared by using protein-containing waste according to the following formula in site, wherein the formula comprises 1) 5-10 percent of protein peptide, 2-6 percent of molasses and the balance of water; 2) 5-10 percent of protein peptide, 0.5-1.0 percent of laccase crude product, 1-2 percent of laccase strain and the balance of water; and 3), 5-10 percent of protein peptide and the balance of water. The formula 1 is suitable for the soil in which plants are planted and which is seriously polluted by heavy metal ions; the formula 2 is suitable for the soil in which plants are planted and which is seriously polluted by heavy metal ions and is polluted by polycyclic aromatic hydrocarbon; and the formula 3 is suitable for directly acting on conventional polluted soil with light pollution. The protein peptide soil repair agent can be used as a nutrient in which a microorganism or indigenous microorganism for promoting the enrichment of the plants to the heavy metal ions, so that the polluted soil is repaired. The soil repair agent has low price, high efficiency and good effect.

The invention relates to a method of using native function microflora to in-situ purify ground water polluted by uranium. The method translates transferable hexavalent uranium into nontransferable uranous uranium in the ground water through nitrate reducing bacteria flora, ferric iron reducing bacteria flora and sulfate reducing bacteria flora which are formed under the anaerobic condition by microorganism, and therefore the purpose of purifying the ground water polluted by the uranium is achieved. The specific implementation method comprises: (1) adjusting a potential of hydrogen (Ph) value of the ground water polluted by the uranium; (2) activating the microorganism in sediments; (3) regulating and controlling variation of the microflora, accelerating evolution of the nitrate reducing bacteria flora, the ferric iron reducing bacteria flora and the sulfate reducing bacteria flora by means of adding a carbon source, regulating oxidation reduction potential of the water polluted by the uranium and the like; (4) continuously regulating and controlling the microbial flora until uranium concentration in the ground water polluted by the uranium is reduced below the national emission standard and the purpose of purifying the groundwater polluted by the uranium is achieved. The method of using the native function microflora to in-situ purify the ground water polluted by the uranium solves in-situ purifying problem of the ground water polluted by the uranium, and has the advantages of being high in purifying efficient, short in period, simple in equipment, short in process procedure, low in purifying cost, strong in operability, free of secondary pollution, good in purifying effect and the like.

The invention discloses a heavy metal contaminated soil remediation device which comprises a storage barrel, a conveyor belt, a treatment seat, a connecting plate and a bucket, wherein two pairs of first traveling wheels are symmetrically arranged on two sides of the bottom end of an outer side wall of the treatment seat; and the connecting plate is welded on one side of the bottom end of the outer side wall of the treatment seat. A pulley matched with a guide seat is arranged on a connecting rod at one end of the screening bucket, and a movable sleeve is arranged on the outer side of a guiderod in a sleeving manner on the outer side wall of the screening bucket. On one hand, by utilizing guide of a bevel end of the guide seat, the screening bucket is matched with a reset spring at the other end of the screening bucket in a process of driving the screening bucket to rotate by a motor, so that the screening bucket can sway from side to side in the rotating and screening process, and the screening efficiency and the screening effect are improved; on the other hand, a second magnetic block having the same magnetism as a first magnetic block is arranged on the top of the movable sleeve, so that the movable sleeve enabling the screening bucket to rotate to a position just under the first magnetic block has a vibratory cleaning effect on the screening bucket, and blockage of sieve pores is avoided.

The invention discloses a multifunctional bio-organic fertilizer and a preparation method thereof, and relates to the technical field of agricultural fertilizers. The multifunctional bio-organic fertilizer is prepared from the following raw materials in parts by weight: 40-60 parts of forestry and agricultural residues, 10-16 parts of active humic acid, 5-15 parts of degreased tea-seed pancake, 0.5-1.5 parts of expanded vermiculite, 0.2-0.8 part of abscisic acid, 0.2-0.8 part of zymophyte, 0.2-0.8 part of beneficial bacterium, 0.2-0.8 part of degrading bacteria, 5-9 parts of urea, 8-12 parts of calcium magnesium phosphate fertilizer, 4-8 parts of potassium sulfate, and 0.5-1.5 parts of medium and trace element. The multifunctional bio-organic fertilizer has the characteristics that the nutritional elements for plant growing are contained; the organic substances are rich; in addition, the contaminated oil can be remediated; the soil structure can be activated; the multifunctional bio-organic fertilizer is applicable to the planting of crops such as rice of southern China, vegetables, watermelon, tobacco, fresh ginger, rape and tea, fruits such as naval orange, grapefruit and pear, garden nursery stock and flowers.

The invention provides an in-situ biological enhancing and benthic environment biological repairing method for bottom mud. The method comprises the following steps: 1) scattering a bottom mud biological curing repair agent into polluted bottom mud in a natural water domain and fully and uniformly stirring the mixture for 8-10 min to biologically modifying the bottom mud; 2) leaving the mixture tostand for 5-10 min after stirring, observing the character of the bottom mud which is modified, carrying out a next step if obvious mud-water separation is available, and otherwise, leaving the mixture to stand for 3-5 min continuously; 3) adding immobilized microbial carrier filler, and leaving the mixture to stand after full and uniform stirring. The method provided by the invention inhibits pollutant release of the bottom mud and degradation of the pollutants by means of the bottom mud biological curing repair agent and an immobilized microbial combination technique on a basis of not destroying the natural circulation of the water body, so that pollution of the overlying water body is reduced.

The invention discloses a force-responsive polymer foam particle and a preparation method thereof; under the action of mechanical force, force-sensitive groups and / or force-responsive components in the force-responsive polymer foam particle undergo chemical and / or physical changes, so that the foam particles form force response. In the polymer foam particle, a force-sensitive group / force responsecomponent with a force response characteristic is introduced, so that a force-responsive foam product with a wide controllable range, and a rich structure and various performances can be prepared. Theforce response polymer foam particle can be used for producing foam packaging materials, impact-resistant protective materials, damping materials, buffer materials, silencing materials, thermal insulation materials and the like with a force response function so as to be widely applied.

The invention discloses a microbial fuel cell for treating pollutants in a eutrophic water body, and belongs to the technical field of water body biologic repair. The pollutants such as ammonia nitrogen and the like in the eutrophic water body are removed at the same time of reducing the bottom sediment of the water body, and meanwhile precious electrical energy is generated. Hydroxyl ions (protons generated in neutralization oxidation reaction) are continuously supplied to an anode by using the traditional water body denitrification technology, and meanwhile protons are continuously suppliedto a cathode so as to promote smooth anode oxidation reaction and cathode reduction reaction and improve the electron yield. The treatment of the pollutants in lakes, rivers or ponds can be realized,and the generated electrical energy can be supplied to underwater electricity devices and landscape illumination, so the microbial fuel cell has important research and practice value.

The invention relates to a combined contaminated soil restoration system and a using method thereof. According to the technical scheme, an anode infiltration mode reaction wall and an anode groove (21) are sequentially arranged on the left side of to-be-restored combined contaminated soil (19) from inside to outside, and a cathode infiltration mode reaction wall and a cathode groove (17) are sequentially arranged on the right side of the to-be-restored combined contaminated soil (19) from inside to outside. The anode infiltration mode reaction wall is composed of a first inorganic permeable membrane (4), a second inorganic permeable membrane (5) and geotechnical cloth (6); and the cathode infiltration mode reaction wall is composed of a third inorganic permeable membrane (11), a fourth inorganic permeable membrane (12) and geotechnical cloth (10). An anode laccase / ABTS mediator system (20) is added into the anode infiltration mode reaction wall, and a cathode laccase / ABTS mediator system (18) is added into the cathode infiltration mode reaction wall; and the voltage of a constant-voltage DC source (7) is 0.5 V / cm<2> to 1.5 V / cm<2>. The combined contaminated soil restoration system is environment-friendly, simple in structure, convenient to operate, small in original soil disturbance, and capable of achieving heavy metal and PAHs degradation and migration at the same time.

The invention discloses a permeable reactive barrier system and a method for in-situ remediation of petroleum hydrocarbon in groundwater by an enhanced anaerobic biotechnology, and belongs to the field of groundwater remediation. Groundwater containing the petroleum hydrocarbon flows through a permeable reactive barrier along the water flow direction, nitrate-reducing bacteria and sulfate-reducing bacteria formed by microorganisms under anaerobic conditions are utilized to degrade the petroleum hydrocarbon in groundwater, and accordingly the purpose of remediation of the petroleum hydrocarbon polluted groundwater is achieved. The permeable reactive barrier system and the method effectively solve the problems of low efficiency and high power consumption in a method for in-situ remediation of the petroleum hydrocarbon in the groundwater with the aid of indigenous microbial flora, and have the advantages of low acting time, high remediation efficiency, strong operability and good remediation effect.

The invention discloses self-adaptive clothing. The self-adaptive clothing is characterized in that at least one part of the self-adaptive clothing at least has self-adaptability based on at least oneof dynamic expansion flow property, vitrified expansion flow property and entanglement expansion flow property; the self-adaptive part based on the flow expansion property has the self-adaptive viscoelasticity, deformation rate, rebound resilience, hardness, mechanical strength, energy absorption property and the like based on the rate; by the adoption of the self-adaptive part, good supporting performance and fixing performance can be provided for the body in the violent movement process, good softness and comfort can be provided in the relaxing movement process or in the static state, goodductility and elasticity are shown under the condition of slow stretching, and wearing and taking-off are facilitated. The part of the self-adaptive clothing can selectively have other self-adaptivitybased on force responsiveness, auxiticity, shape memory property, self-repairability, damp-heat adjustability and the like at the same time, the special effect of adapting to multiple scenes can be achieved, and frequent replacement is not needed.

A method for in-situ or ex-situ remediation of groundwater nitrate pollution by utilization of wheat straws is characterized in that wheat straws and / or pretreatment products of the wheat straws are taken as denitrification carbon source, and under the action of denitrifying bacteria flora, the contaminant (namely, nitrate nitrogen) in groundwater is removed through biological denitrification. The method provided by the invention has the advantages that on one hand, wheat straws and other agricultural waste are recycled, and on the other hand, nitrate pollution of groundwater can be eliminated. The invention belongs to the field of application of water treatment technology; carbon source does not need to be supplemented additionally; a biological treatment unit is simplified; the method can be used for in-situ remediation as well as for building an extraction type ex-situ remediation reactor; and the reaction rate is high, and less secondary pollution is caused.

The invention discloses a force-responding polymer foam composite material, which is characterized by comprising polymer foam particles with skins and a force-responding polymer, wherein a polymer chain of the force-responding polymer contains at least one force-sensitive group, and / or at least one force-responding component is blended in the polymer; under the action of mechanical force, a force-sensitive group and / or a force response component in the force response polymer are / is subjected to chemical and / or physical change to realize force response, wherein the polymer foam particle with the skin is prepared from an expandable polymer (composition) or an expandable polymer precursor (composition) through direct foaming and / or 3D printing, and has a skin structure; the coated polymer foam particles are compounded with the force-responding polymer and other optional components to form the composite material. The composite material has the characteristics of low density, lightness, heat insulation, sound insulation, buffering, shock absorption and force response, and can be widely applied to manufacturing of packaging materials, building materials, impact-resistant protective materials, shock absorption materials, buffering materials, sound attenuation materials, heat preservation materials, shape memory materials, electronic and electrical appliance materials, medical suppliesand the like.

The invention discloses a built-in biochemical-ecological system based on an in-river rainwater runoff purification river bank. The built-in biochemical-ecological system is formed by five parts of a rainwater desanding well, a rainwater runoff rubble filter dam, an anaerobic organism filter dam, a bidirectional flow wetland purification system and a rubble slope protection in-river water quality repairing system. The built-in biochemical-ecological system disclosed by the invention has the advantages of no energy consumption, ecologicalization, landscaping, and efficient rainwater runoff purification, can guarantee the in-river water quality, and is a necessary means for realizing long effectiveness of river governance; meanwhile, the built-in biochemical-ecological system has a function of repairing a water body, realize rainwater containment, and is an effective measure for building a sponge type city at present; the built-in biochemical-ecological system is positioned at the inner part and the upper part of the river bank, so that the land resource needs not to be additionally occupied, and flood discharging is not affected as the hydraulic radius of a river way is not reduced; meanwhile, a landscape effect of the river way can be increased, so that many purposes can be achieved at one stroke.

The invention discloses a medicament for in-situ repair of high-concentration polycyclic aromatic hydrocarbon polluted soil and application thereof; effective components are micro-nano iron sheets andsodium persulfate; and the high-activity micro-nano iron sheets are used for efficiently catalyzing sodium persulfate to generate high-oxidation free radicals so as to effectively degrade high-concentration PAHs (201.1 mg / kg) in soil. The medicament formula of the micro-nano iron sheets activating persulfate not only can efficiently degrade PAHs under laboratory underbrush conditions, but also can quickly and efficiently repair the high-concentration PAHs polluted soil in situ under the pilot scale test scale (360 cubes of soil); and the enzyme activity index of the repaired soil under environmental protection is not prominently changed. The repair medicament is suitable for in-situ field repair of the high-concentration PAHs polluted soil, is high in efficiency, convenient to operate andenvironment-friendly, and provides broad prospect for repair of the high-concentration PAHs polluted soil.

The invention discloses a method for remedying heavy metal contaminated soil under the combined action of an activating agent and plants. The method comprises the following steps: (1), planting: planting heavy metal-enriching plants on contaminated soil; (2), activating: spraying an aqueous citric acid solution on the contaminated soil; (3), harvesting: harvesting the aboveground parts and the underground parts of the plants respectively; (4), performing subsequent treatment: discomposing the harvested aboveground parts and the harvested underground parts, extracting heavy metals, and repeating the activating step and / or the harvesting step. The method has the advantages of a good remedying effect, capability of achieving in-situ remediation, a short remedying cycle and the like, and is ofa great significance in widening the application range of a phytoremediation technology in the field of contaminated soil remediation.

The invention relates to a method of constructing an ecological revetment for intensively intercepting and clearing non-point pollution based on organisms, which comprises the steps of investigating hydrologic conditions of a river, determining non-point pollution load and hydraulic retention time of a riparian zone in a unit length, analyzing characteristics of the non-point pollution along the river, screening a high-efficiency bacterium which can efficiently remove the non-point pollution or constructing gene engineering bacteria capable of removing nondegradable organic pollutants, constructing hollow hexahedral ecological revetment members, and growing plants in the members, thereby constructing the ecological revetment. Compared with the prior art, with the adoption of the method, the non-point pollution, particularly the nondegradable organic pollutants, can be removed effectively, the river pollution load can be decreased, potential ecological risks of the non-point pollution to a river ecosystem are reduced, and local raw materials are utilized to improve the environmental compatibility of the members, so that good habitat conditions are provided for the growth of microbial communities and vegetations at the riparian zone, and the mechanical stability of the riparian zone is improved.

The invention discloses a multifunctional nitrogen and phosphorus removing agent as well as a preparation method and an application thereof. The preparation method of the multifunctional nitrogen and phosphorus removing agent comprises steps as follows: nano Fe3O4 is prepared from ferric chloride and ferrous sulfate with a coprecipitation method, an inorganic polymeric flocculant is deposited on the surface of nano Fe3O4 with a deposition process or an organic polymeric flocculant is deposited on the surface of nano Fe3O4 with an in-situ polymerization method, a nano Fe3O4 / polymeric flocculant composite material is obtained and supported with microbial strains, and the multifunctional nitrogen and phosphorus removing agent is obtained. The agent has quite strong capacity of molecular bonding capture, flocculating settling, biodegradation and adsorption, can synergistically remove nitrogen and phosphorus compounds, organic matter and heavy metal such as Pb(II), Cd(II), Mn(II), Cr(III) and the like in a water body, is low in sludge yield, can rapidly realize solid-liquid separation under the action of external magnetic field force without secondary pollution, is environment-friendly and has good application prospect.

The invention discloses an alkaline organic fertilizer for restoring soil polluted by heavy metals and a preparation method of the alkaline organic fertilizer, and relates to the technical field of agricultural fertilizers. The alkaline organic fertilizer is prepared from, by weight, 1-3 parts of urea, 1-3 parts of potassium sulphate, 2-6 parts of diammonium phosphate, 10-30 parts of tobacco straw, 30-40 parts of alkaline ash, 15-35 parts of livestock manure, 10-30 parts of bean stalks, 10-30 parts of purple soil, 1-3 parts of microelements, 0.5-1.5 parts of biological bacteria, 3-5 parts of lime nitrogen and 0.02-0.04 part of nitragin. The alkaline organic fertilizer has a good restoring effect on the soil polluted by the heavy metals, is suitable for being used in acidic soil, can be used for farmland soil heavy metal pollution restoration and ecological improvement in southern paddy fields in China, and can also be used for dry farmland soil heavy metal pollution restoration and ecological improvement in the south.

The invention is concerned with laser in situ remediation method for steam turbine cavitation vane, belonging to laser machining technology field. The laser bean sent from laser transfers to laser work head, and in the laser work head, laser bean converges to the reflecting mirror through transmission mirror. The axis line to beam of light converged by reflecting mirror and transmission mirror is 30 to 60 degree, and the laser bean reflected by reflecting mirror to the steam turbine cavitation surface through muzzle. There is feeding equipment to powder on the place of muzzle, and the anti- cavitation stuff fed by feeding equipment to powder is melted by laser and repairs the cavitation surface. The beam of light sent by laser repairs the cavitation surface and the laser bean turns in the laser work head to reach the position to be repaired of vane, and this realizes the in situ remediation of the steam turbine vane at narrow space without disassembly.

The invention discloses a coastal shallow wetland construction method for hard landing river routes. The method comprises the steps that a site is selected on the two sides of a hard landing river route, poles are struck on the selected site, so that the pole and the river coast form a wetland unit, rock blocks are piled on one side of the river route near the struck poles, combined fillings are laid on the inner side of the bed body of the wetland unit, wetland plants are planted on the laid combined fillings, and the coastal shallow wetland is constructed. According to the construction method, the characteristics of large amount of microorganisms, dense biofilm, strong water treatment ability and strong adaptability of the combined fillings are utilized, an optimized combination of the wetland plants is adopted, the entrapment ability of the wetland to pollutants is strengthened, the purification effect of the nitrogen and phosphorus in water is increased, so that the overall biological system operates highly efficiently to finally form a stabilized and sustainably usable system, and the river water purification ability of the system is increased.

The invention provides a biochar restorer for heavy-metal polluted marine deposits and preparation and restoration methods for the biochar restorer and relates to the field of marine pollution treatment. The preparation method provided by the invention comprises the following steps: 1) treatment of raw materials: drying plant raw materials, and carrying out crushing and sieving; drying sewage treatment flocculant wastes in the air, and carrying out crushing and sieving; and adding water into flocculating wastes to prepare turbid fluid, uniformly mixing the plant raw materials and the flocculant wastes according to a mass ratio of 1: 1, and carrying out baking and crushing, so as to obtain a raw-material mixture; and 2) preparation of restorer: pyrolyzing the raw-material mixture in a hermetic electric furnace in a nitrogen gas atmosphere, and carrying out cooling in the nitrogen gas atmosphere after pyrolyzing ends up, thereby obtaining the biochar restorer. After the restorer providedby the invention is used, the bioavailability level of heavy metals in the marine deposits can be obviously reduced, and the toxic action on marine benthos caused by the heavy metals is alleviated.

The invention relates to a water protection and remediation technique, in particular to a surface water protection and remediation floating bioreactor. In a vertical tubular barrel (2), a porous material serves as a carrier for a biomembrane (4); the center of the upper part of the barrel (2) is communicated with a vertically upward water outlet pipe (1), a water inlet (6) is formed at the bottomof the barrel (2), and the water inlet (6) is connected with a submersible pump (5); and a plurality of buoys (3) are arranged on the outside of the barrel (2). The using method of the bioreactor comprises: allowing solution containing microbes to be absorbed on the surface of the porous material to form the biomembrane (4); continuously delivering water to the reactor by the submersible pump (5)and allowing the water to flow by the surface of the biomembrane (4) to purify the water; and the outlet end of the water outlet pipe (1) is designed to be in a spring or waterfall mode. In the invention, the water purification and remediation speed is high, and the water purification and remediation quality is high; the bioreactor can float on water surface and can move and float in a larger water area to perform water remediation, the pertinence of the bioreactor is high, the effect is desirable, the overall remediation speed is high, and the bioreactor can be designed with a landscape enjoying and water purification combined structure.

The invention relates to an in-situ decrement remediation method for a cadmium-polluted farmland, which comprises the following steps: turning over a farmland to be repaired, meanwhile, introducing aneluting agent solution into the farmland to enable the turned-over soil and the eluting agent solution to be uniformly mixed, then standing for layering, putting an ecological floating plate into thefarmland, and taking out the ecological floating plate after 15-30 days, so as to realize in-situ removal of cadmium in the cadmium-polluted farmland. According to the method, efficient decrement remediation of the Cd-polluted farmland is carried out in situ, the technological process is simple, the cost is low, and the method is environmentally friendly.

The invention discloses a Fontibacterferrireducenss p. nov. CCTCCM 2011498 and the application of the Fontibacterferrireducenss p. nov. CCTCCM 2011498 in iron reduction. The SgZ-2 has stronger anaerobic iron reduction capacity and potential application value in the aspect of environmental modification.

The invention relates to a method for repairing PAHs-polluted soil by enhancing the electrodynamics through a surface active agent. The method is characterized by comprising the steps that a work shed is built above the PAHs-polluted soil (11) to be repaired, and the PAHs-polluted soil (11) to be repaired is loosened mechanically; a surface active agent solution is sprayed to the surface of the loosened soil with the spraying amount being 10-100 L / m<2>; an anode chamber (13) and a cathode chamber (9) are symmetrically arranged on the two sides of the PAHs-polluted soil (11) to be repaired, an anode buffer solution flows circularly between the anode chamber (13) and an anode buffer pool (2), and a cathode buffer solution flows circularly between the cathode chamber (9) and a cathode buffer pool (5); the voltage gradient of a constant-voltage direct-current power source (3) is 0.1-1 V / cm; and on the 1st-3rd day of the circulation flowing process, 10-100 L of a laccase solution is sprayed to the surface of each square meter of the PAHs-polluted soil (11) to be repaired at a time. The method has the characteristics of being simple in repairing system, capable of achieving in-situ repairing, environmentally friendly and safe, and migration and degradation of pollutants in the PAHs-polluted soil can be achieved simultaneously.