16 results about "Mercury contamination" patented technology

The invention discloses a mercury-resistant and mercury-removal Leclercia adcarboxsaca and an application thereof. The strain number of the Leclercia adecarboxyla disclosed by the invention is W13, and the preservation number of the Leclercia adecarboxyla is CGMCC (China General Microbiological Culture Collection Center) NO.34142. The strain disclosed by the invention is an efficient growth-promoting bacterial strain capable of resisting mercury, removing mercury and promoting growth, and particularly has a very strong effect on removing mercury by promoting mercury volatilization; in addition, the strain can be colonized in miscanthus sinensis, promote growth of miscanthus sinensis in a mercury-polluted environment, promote absorption of miscanthus sinensis to mercury in soil and promote volatilization of mercury in soil, so that the combination of Leclercia adcarboxamide and miscanthus sinensis can effectively repair mercury-polluted soil, and has a wide application prospect in treatment of mercury-polluted soil.

The present disclosure provides a fungus and a microbial agent for treating mercury contamination, use thereof, a mercury removal method, and a method for identifying a fungus capable of treating mercury contamination, and relates to the technical field of biological mercury removal. The present disclosure provides a Metarhizium fungus and 8 species of non-Metarhizium fungi for treating mercury contamination, a method for identifying a fungus capable of treating mercury contamination, and enzymes for removing methylmercury and divalent mercury, which provides a genetic basis for treating mercury contamination with recombinant fungi or bacteria.

The present application relates to mercury pollution treatment technical field, especially laboratory mercury pollution automatic processing method, the method includes the following steps: step S1: the mercury waste gas is from the air inlet pipe into the pretreatment pool, so that the mercury waste gas is contacted with the absorption liquid to absorb the mercury waste gas; Step S2: when the absorption liquid changes color, the first color sensor sends a signal to the control host, the control host controls the multiple electric telescopic rod to drive the shielding block to move, so that the air outlet pipe is opened, the control host controls the first valve to open, so that the absorption liquid is contacted with the filter material through the liquid outlet pipe into the filter tank to reduce mercury ions to metallic mercury; The present application can accurately and efficiently treat mercury vapor, mercury waste liquid and find mercury leakage in time, so as to guarantee the personal safety of the experimenter.

The application provides a mercury-contaminated soil treatment process and a mercury-contaminated soil treatment system. The mercury-contaminated soil treatment process comprises: treating the mercury-contaminated soil by using a thermal desorption heating process, so that mercury in the mercury-contaminated soil is thermally desorbed from the mercury-contaminated soil in a gaseous form and forms mercury vapor; cooling the mercury vapor, so that at least part of the mercury in the mercury vapor is converted from the gaseous form to a liquid form and forms liquid mercury; performing a sedimentation process on the liquid mercury, in which the liquid mercury is combined with suspended material to form a mercury suspension and is suspended in an upper layer of the liquid, and the mercury in the mercury suspension is recovered and treated. The technical scheme provided by the application can solve the technical problem of poor mercury removal effect of the mercury-contaminated soil treatment process in the prior art.

The invention provides a method for enhancing methyl mercury degradation capacity of phytoplankton, and belongs to the field of biotechnology. The method for enhancing the methyl mercury degrading capacity of the phytoplankton comprises the step of enabling the phytoplankton to overexpress a methyl mercury lyase gene merB. The organic mercury lyase coded by the merB gene, namely the MerB protein, can decompose high-toxicity methyl mercury into low-toxicity Hg and methane (CH), so that the tolerance of phytoplankton expressing the merB gene to the methyl mercury can be enhanced. Meanwhile, the phytoplankton can enrich methyl mercury in the water environment, the phytoplankton serves as a primary producer in a food chain and is a source of substances and energy, the content of methyl mercury can be reduced from the source by reducing the methyl mercury in the phytoplankton, and therefore the ecological health risk that the methyl mercury is transmitted along the food chain is reduced. The mercury metabolic pathway of phytoplankton is enhanced through genetic engineering, and an efficient and sustainable method is provided for bioremediation of mercury pollution.

The invention discloses safe, environment-friendly and stable-performance liquid gold ink and a preparation method thereof. According to the gold ink, high-purity gold foil or gold powder serves as a main color developing material, oxhide gelatin serves as an adhesive, and iron oxide red and mica powder are innovatively compounded to replace toxic cinnabar to serve as a color adjusting agent, so that the mercury pollution risk is fundamentally eliminated; meanwhile, bletilla striata gum and tung oil form a suspension system, and an MCC / HPMC compounding agent is introduced to form a three-dimensional network structure, so that the problem of gold powder sedimentation is effectively solved, long-term stability of the ink is ensured, and the ink is ready to use after being taken. In addition, a borneol and clove plant compound preservative system is adopted, so that the cost is reduced while the natural properties are kept. The preparation process is standardized through step-by-step feeding, mechanical stirring and low-temperature curing, the product consistency and the production efficiency are remarkably improved, and the production period is shortened to be within 10 days.

The invention relates to the technical field of environmental protection, and discloses a method for restoring mercury-polluted soil by using oilseed rape and nano sulfur while producing. Compared with a traditional remediation method, the method has the advantages that the nano-particles of the nutrient element sulfur necessary for plants are introduced, rape crops with high stress resistance and wide adaptability are selected for matching, and the simple and efficient method for remediation while production of the rape-nano-sulfur for soil mercury pollution, which is easy to popularize in a large area, is created. The nanometer sulfur particles with a certain concentration are applied to the mercury-polluted soil, so that the accumulation of mercury on the overground part of the rape can be obviously reduced. The remediation method can be applied to the technical field of environmental protection, is particularly applied to plant remediation of light and medium mercury contaminated soil in the middle and lower reaches of the Yangtze River, and is easy and convenient to operate and wide in application range.

The present invention belongs to the field of the treatment of mercury and provides a method for removing divalent inorganic mercury. In the present invention, under the condition of a pH value of 3-10, a mercapto reagent, sulfur powder, and a matrix having divalent inorganic mercury to be removed are mixed and undergo a reaction, wherein the mercapto reagent comprises one or more of 2-mercaptoethanol, L-cysteine, and glutathione. The elemental sulfur powder is used for generating divalent sulfur ions, and the divalent sulfur ions are bonded to divalent mercury ions to generate a mercury sulfide precipitate, so that the treatment of divalent-mercury-ion-related mercury pollution is realized. Directly using the elemental sulfur powder to treat divalent-mercury-ion-related mercury pollution has the problem of a low divalent sulfur ion generation efficiency. In order to improve the generation efficiency of divalent sulfur ions from the elemental sulfur powder in an aqueous solution, according to the present invention, by using a mercapto compound as a reducing agent, the mercapto compound and the elemental sulfur powder undergo a redox reaction at a suitable pH (3-10) to generate divalent sulfur ions, which react with the divalent mercury ions to form a mercury sulfide precipitate, thereby achieving the treatment of the divalent-mercury-ion-related mercury pollution.

The present invention belongs to the technical field of contaminated soil remediation, and particularly relates to a passivator for remediating mercury-contaminated soil, a preparation method thereof, and an application. In the present invention, organic sulfur TMT-15 is an environment-friendly heavy metal complexing agent, which is stable and will not cause secondary pollution to the soil. In particular, it reacts with mercury to form a stable complex. Non-metallic minerals such as diatomite have an adsorption property for heavy metals. By loading organic sulfur TMT-15 onto the non-metallic mineral material, the two act synergistically to improve the passivation rate of mercury-contaminated soil. Moreover, the adsorption property on the surface of the non-metallic mineral firmly adsorbs the Hg-TMT complex onto the surface of the non-metallic mineral, prolonging the passivation time of mercury-contaminated soil and solving the problem of short effective passivation time of heavy metal-contaminated soil in the current market.

The invention discloses a mercury mining area soil pollution control agent and a preparation method and application thereof, and specifically relates to the technical field of soil remediation agents. The control agent comprises an organic matrix containing arbuscular fungi, humic acid and mercury-resistant plants, and the ratio of the organic matrix of the arbuscular fungi to the humic acid is (1-3):1. The combined application of arbuscular fungi and humic acid in the mercury-contaminated soil of the invention can greatly increase the infection rate of arbuscular fungi, and improve the biomass, mercury tolerance concentration and mercury extraction of mercury remediation plants. Its mercury pollution control effect and plant remediation effect exceed the effect of applying humic acid or arbuscular fungi alone.

The invention discloses a method for reducing accumulation of mercury in fish bodies by using fish-derived nano-selenium-rich lactic acid bacteria, and belongs to the technical field of aquaculture. The method comprises the following steps: preparing biological nano-selenium dry powder by utilizing nano-selenium-rich lactic acid bacteria; the selenium content of the selenium-rich fish feed is 0.5 mg / kg, and the content of the nano-selenium-rich lactic acid bacteria is 105 cfu / kg; from a fry stage to a commercial fish stage, feeding the fish with the selenium-rich feed. By adopting the method for reducing accumulation of mercury in the fish body, the mercury content in muscles and visceral groups of the cultured fish is relatively low, but the mercury content in the muscles of the fish cultured in the mercury-containing polluted water body reaches 0.91 mu g / g, and the mercury content in the visceral groups reaches 21.34 mu g / g; by adding the selenium-rich lactic acid bacteria into the feed, the mercury content of fish muscles in mercury polluted water can be reduced by 75.82%, the mercury content of fish viscera can be reduced by 81.87%, and the use of the selenium-rich lactic acid bacteria provides guarantee for the health of fish bodies and the edible safety of fish meat.

The invention relates to a method for synthesizing mercuric sulfide by an all-wet method, which adopts industrial crude mercury and a sodium sulfide purified solution as raw materials, takes a solution phase controllable reaction as a core, breaks through the bottlenecks in raw material limitation, reaction conditions, product regulation and environmental protection in the prior art, and aims to solve the problems that the prior art depends on a high-temperature or high-pressure environment, the reaction process is uncontrollable and the like. And through precise regulation and control of solution phase parameters, mild reaction conditions and controllable process are realized, and the method is suitable for application scenes such as electronics and medicines. Crystal form orientation is realized through dual control of crystallization rate and additives, beta-HgS is generated through rapid crystallization, and alpha-HgS is generated through slow crystallization; the problem of mercury pollution or other toxic gas pollution in actual operation is solved, a traditional method for synthesizing mercuric sulfide from mercury and sulfur or hydrogen sulfide is replaced, and a low-pollution and low-energy-consumption synthesis method is formed.

The invention discloses co-pyrolysis biochar capable of reducing enrichment of methyl mercury in rice as well as a preparation method and application of the co-pyrolysis biochar. According to the method, enteromorpha powder and rice straw powder are mixed and then pyrolyzed. According to the invention, the co-pyrolysis biochar is applied to the rice field soil in a small addition amount, so that the absorption and accumulation of the rice to the methyl mercury in the soil can be obviously reduced, and the concentration of the methyl mercury in the rice can be reduced by 83% when the usage amount is 0.3%. The co-pyrolysis biochar is wide in raw material source, small in biochar application amount, low in cost and simple in biochar production and preparation process, and the mercury-polluted soil remediation effect is remarkably higher than that of single pyrolysis biochar. The co-pyrolysis biochar provided by the invention has good application prospects in the aspects of rice field soil remediation and improvement, waste biomass recycling and the like.

The invention relates to a preparation method of mesoporous silica pore channel confinement ferrous sulfide and application of the mesoporous silica pore channel confinement ferrous sulfide in mercury pollution remediation, ferrous sulfide is precipitated among pore channels of mesoporous silica nanoparticles by using a double-solvent method, and nano confinement ferrous sulfide is prepared. The mesoporous silica pore channel confinement ferrous sulfide can be used for removing mercury in environmental pollution, and has higher mercury saturation adsorption capacity and stronger mercury methylation inhibition effect. The confined ferrous sulfide can maintain good dispersibility due to the support of the mesoporous silicon pore skeleton, so that efficient fixation of mercury ions and effective control of methyl mercury pollution are maintained.

The application discloses a kind of photocatalytic oxidation and mercury removal agent combined oil and gas field mercury-containing sewage treatment system and method, belong to oil and gas engineering technical field.The pipe type ultraviolet photooxidation reactor includes the TiO2 catalyst loaded on the inner surface of reaction tube, mercury-containing sewage is pumped into the inside of pipe reactor with pump air from water inlet, and the oxygen in air is oxidized under the action of TiO2 catalyst on the inner wall of reactor, and the organic mercury and low-valence inorganic mercury in sewage are Hg (II) ;Subsequently, mercury-containing wastewater after oxidation treatment enters the mixing reactor, and reacts by adding mercury removal agent, to realize the standard removal of mercury pollution in wastewater, with the advantages of simple operation, good removal effect, environmental protection and the like.

The invention relates to a bioremediation method for targeted lysis of mercury methylated bacteria by using a specific bacteriophage, which comprises the following steps: separating target bacteria from lake sediments polluted by mercury, screening bacteriophages capable of lysing the bacteria, culturing the bacteriophages and obtaining a high-concentration bacteriophage preparation, and applying the bacteriophage preparation to the sediments. Methylation of mercury is mainly mediated by specific bacteria (such as sulfate reducing bacteria and methanogens), and the bacteria exist in the sediment in a large number. By screening and culturing bacteriophages capable of effectively splitting the bacteria, the number of the bacteriophages can be remarkably reduced, and the generation of methyl mercury is further reduced. Experimental results show that after the bacteriophage is applied, the concentration of methyl mercury in sediment is remarkably reduced and reaches 60% or above, and the method has application potential in lake ecological restoration. The method has the advantages of simple operation, low cost, environmental protection and the like, and is suitable for wide water pollution treatment.