37results about How to "Reduce heavy metal activity" patented technology

The invention discloses a tobacco stalk biochar soil conditioner capable of reducing the content of heavy metals in tobacco, improving the tobacco quality and improving the soil environment, as well as an improvement method for tobacco field soil. The tobacco stalk biochar soil conditioner is prepared by mixing the following raw materials in parts by weight: 40-60 parts of tobacco stalk biochar and 40-60 g of a passivant. The tobacco stalk biochar soil conditioner is easy to obtain raw materials, simple in preparation method and low in cost, can effectively reduce the content of heavy metals in tobacco, and can improve the quality of tobacco field soil; a large number of waste tobacco stalks generated in tobacco growing areas are adopted as the raw material, the resource recycling of waste materials is realized, the sustainable development of the tobacco industry is facilitated, and the tobacco stalk biochar soil conditioner is suitable for large-scale popularization and application in the field of tobacco growing.

The invention discloses a planting method of jute in heavy-metal contaminated soil. The method comprises the following steps of: A, preparing soil and building a field, and applying passivator to reduce activity of heavy metal in the soil; B, selecting a specific jute variety with strong heavy metal contamination resistance, sowing in an enough amount at proper time to guarantee full seedlings; C, determining appropriate close planting, thinning/finally singlings in good time, and reserving enough basic seedlings; and D, intertilling/weeding in time, rationally topdressing/irrigating to culture effective strong plants; E, reinforcing prevention and control of diseases and insect pests to realize high yield of jute. By the jute planting method, the average yields of raw stems in light, medium and heavy contaminated jute fields are respectively 181.0+/-16.4, 174.9+/-15.7 and 158.5+/-15.3kg/mu, which reaches the high-yield level of the jute growing area in South China; and the content of heavy metal in raw jute can be controlled in a range of related standard limit, so that agricultural safety and effective utilization of heavy metal contaminated soil can be realized. The method is simple in technology and practical, and has wide application prospect in broad heavy metal contaminated areas.

The invention discloses a sludge treatment method and an agricultural sludge biochar acquired by adopting the method. The agricultural sludge biochar is mainly prepared through low-temperature oxygen-limited decomposition of organic and inorganic antidotes and citizen sludge which are uniformly mixed, and the antidotes accounts for 3%-20% of the amount of dry matter of the citizen sludge. With the adoption of the sludge treatment method, activity and total amount of heavy metal in a carbonized product can be effectively reduced, pathogenic bacteria are killed, organic pollutants such as polycyclic aromatic hydrocarbon and the like are eliminated, and nutrients can be maintained to the greatest extent, so that the product is applicable to the plantation fields such as agriculture, forestry and the like.

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 discloses a saline-alkali soil improving agent and a preparation method thereof. The saline-alkali soil improving agent comprises the following components in parts by weight: 8 to 12 parts of desulfurized gypsum, 30 to 50 parts of biogas residue, 20 to 30 parts of sepiolite ore powder, 10 to 15 parts of oyster shell powder, 5 to 10 parts of phosphate, 3 to 8 parts of humic acid ore powder, 2 to 6 parts of expanded vermiculite powder, 1 to 5 parts of ferrous sulfate, 2 to 4 parts of modified plant straw powder, 0.5 to 1.5 parts of diatomite, 0.4 to 0.8 part of carboxymethyl chitosan, 0.3 to 0.7 part of rotten vinasse, 0.2 to 0.6 part of a microbial preparation and 3 to 7 parts of an organic fermented fertilizer. The saline-alkali soil improving agent can effectively improve the soil structure and reduce the alkalization degree of the soil so as to promote the growth of crops and increase production.

The invention discloses a planting method of flax in heavy-metal contaminated soil. The method comprises the following steps of: A, preparing soil and building a field, and applying passivator to reduce activity of heavy metal in the soil; B, selecting a specific flax variety with strong heavy metal contamination resistance, sowing in enough amount at proper time to guarantee full seedlings; C, rationally and closely planting, intertilling/weeding/topdressing in time to culture effective robust plants; and D, reinforcing prevention and control of diseases and insect pests, harvesting at proper time, and drying in the sun and storing appropriately. By the flax planting method, the average yields of raw stems in light, medium and heavy contaminated soil is respectively 308.2+/-29.0, 283.2+/-30.3 and 254.7+/-28.6kg/mu, which reaches the high-yield level of the flax growing areas in South China; and the content of heavy metal in raw stem coarse fiber can be controlled in a range of related standard limit, so that agricultural safety and effective utilization of heavy metal contaminated soil can be realized. The method is simple in technology and practical, and has wide application prospect in broad heavy metal contaminated areas.

The invention discloses a soil activating agent and a preparation method thereof. The soil activating agent is prepared from 8-12 parts of modified zeolite powder, 30-50 parts of biogas residues, 20-30 parts of straw powder, 10-15 parts of rice bran, 5-10 parts of rape seed cakes, 3-8 parts of humic acid mineral powder, 2-6 parts of swelling vermiculite powder, 1-5 parts of shell powder, 2-4 partsof gypsum powder, 0.5-1.5 parts of kieselguhr, 0.4-0.8 part of carboxymethyl chitosan, 0.3-0.7 part of leavening agent, 0.2-0.6 part of microelement additive and 3-7 parts of organic fertilizer. Theprovided soil activating agent can effectively improve soil structure, activate edaphon, enhance soil fertility, improve the soil capacity of preserving moisture and fertility, facilitate forming of soil aggregates, and be long in lasting time of preserving moisture and fertility and aggregating capacity, simple in preparation, low in cost, easy to operate, green and environmentally friendly.

A method of preparing a plant cultivation medium by utilizing agriculture and forestry waste and the prepared cultivation medium are disclosed. The method includes 1) spraying the agriculture and forestry waste with water to adjust the water content of the agriculture and forestry waste, and 2) adding a fermentation catalyst, a microbe agent and brown sugar into the agriculture and forestry waste, fully stirring and fermenting. The plant cultivation medium is balanced in nutrition, high in nutrient contents, reasonable in structure, stable in physical properties, and convenient for plant absorption, meets plant growth needs and increases the survival rate of plant cultivation and ornamental effects.

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 discloses organo-mineral biochar complex formula fertilizer and a preparation method thereof. The preparation method of the organo-mineral biochar complex formula fertilizer comprises the following steps: (1) a premix is obtained by mixing organic matter with biochar; (2) the premix obtained in the step (1) is subjected to composting fermentation; (3) the organo-mineral biochar complex formula fertilizer is obtained by adding chemical fertilizer to a fermentation product obtained in the step (2). According to the complex formula fertilizer, plant-sourced organic matter and animal-sourced organic matter are subjected to mixed fermentation, raw materials are subjected to biosafety disposal, the biochar is formed and plays an adsorption role, and clean organic fertilizer is produced; a balanced and reasonable NPK formula is realized according to the organic matter with difference sources, and maximization of the fertilizer efficiency is realized.

The invention belongs to the field of soil pollution treatment, and discloses a passivation remediation agent for arsenic-cadmium composite contaminated soil, and a preparation method and applicationmethod thereof. Wormcast is utilized to enrich organic matters, adsorption and complexing immobilization of cadmium are realized, and iron (hydroxide) oxide formed by zero-valent iron in soil is utilized to generate adsorption precipitation with arsenic, so that synchronous passivation of arsenic and cadmium is realized. In addition, the wormcast can remarkably improve the soil quality, and comprehensive treatment and remediation can be conducted on the arsenic-cadmium composite contaminated soil. On one hand, zero-valent iron serving as a strong reducing agent is extremely easy to oxidize toform amorphous iron (hydroxide) oxide, and more adsorption sites are provided for arsenic and cadmium; on the other hand, the wormcast provides more organic matters for soil, increases cation exchangecapacity, increases the pH of the soil, and facilitates adsorption and immobilization of cadmium and activity reduction. Besides, the wormcast and iron are partially combined to form an iron oxide-organic carbon composite, so that soil carbon immobilization is facilitated, and the soil quality is improved.

The invention belongs to the technical field of production of fertilizers, and particularly relates to a special biological organic fertilizer for forage grass and a production method of the special biological organic fertilizer. The special biological organic fertilizer for the forage grass comprises the following raw materials in parts by weight: 70-100 parts of animal excrement, 50-60 parts oftung residues, 50-65 parts of sugarcane tail tips, 30-50 parts of mushroom bran, 20-40 parts of soy sauce lees, 10-40 parts of rapeseed cakes, 3-5 parts of bentonite, 10-20 parts of molasses, 3-6 parts of diammonium phosphate, 4-7 parts of magnesium sulfate heptahydrate, 5-10 parts of potassium humate, 1.0-1.5 parts of a trace element fertilizer, 5-8 parts of bone powder, 5-7 parts of cortex meliae powder, 4-6 parts of baeckea frutescen powder and 13-18 parts of a fermentation microbial inoculum. The special biological organic fertilizer for the forage grass is rich in organic matters and a large amount of beneficial biological bacteria, the survival rate of the beneficial biological bacteria in soil is high, the number of beneficial microorganisms in the soil can be effectively increased,and the activation property of the soil can be improved; and by application of the special biological organic fertilizer for the forage grass, growth of the forage grass can be promoted effectively,and the yield and quality of the forage grass are improved.

The invention provides a soil conditioner capable of reducing activity of heavy metals, a preparation method and a soil improvement method. The soil conditioner capable of reducing activity of heavy metals is prepared from components in parts by weight as follows: 20-30 parts of a chitosan/graphene oxide composite, 5-10 parts of silicate, 15-25 parts of slaked lime, 3-5 parts of bentonite, 5-10 parts of biomass waste, 20-25 parts of organic fertilizer, 1-3 parts of humic acid and 1-3 parts of a binder. The soil conditioner capable of reducing activity of heavy metals has the advantages of lowcost, high operability and the like and can prevent the heavy metals from being activated again, the usage amount of chemical fertilizer is reduced and the planting cost is saved.

The invention discloses soil activation powder which comprises the following components in parts by weight: 8-12 parts of modified zeolite powder, 30-50 parts of biogas residues, 20-30 parts of strawpowder, 10-15 parts of rice bran, 5-10 parts of rape seed cakes, 3-8 parts of humic acid ore powder, 2-6 parts of expanded vermiculite powder, 1-5 parts of shell powder, 2-4 parts of gypsum powder, 0.5-1.5 parts of kieselguhr, 0.4-0.8 part of carboxymethyl chitosan, 0.3-0.7 part of a fermentation agent, 0.2-0.6 part of a trace element additive and 3-7 parts of an organic fertilizer. By adopting the soil activation powder disclosed by the invention, soil structures can be effectively improved, soil microorganisms can be activated, soil fertility can be improved, in addition, the water and fertilizer retention capability of soil can be improved, soil aggregate formation can be promoted, a long water and fertilizer retention time is achieved, the aggregation capability lasts for a long time,and the soil activation powder is simple to prepare, low in cost, easy to implement and green and environmentally friendly.

The invention discloses a dyeing sludge treatment device which sequentially comprises a settling box, an anaerobic digestion reactor, a dryer, a grinding device and a combustion device according to the sludge treatment process, wherein an electric heating sleeve for heating and drying material is mounted at the outer part of the dryer; a gas outlet is formed on the anaerobic digestion reactor; a discharge pipeline is arranged at the lower parts of the settling box, the anaerobic digestion reactor, the dryer, the grinding device and the combustion device respectively; the discharge pipeline of the settling box is connected with a feed port of the anaerobic digestion reactor; the discharge pipeline of the anaerobic digestion reactor is connected with a feed port of the dryer; the discharge pipeline of the dryer is connected with a feed port of the grinding device; the discharge pipeline of the grinding device is connected with a feed port of the combustion device; and a discharge valve is arranged on each discharge pipeline. The treatment device disclosed by the invention can effectively reduce concentration of harmful substances in sludge and reduce pollution caused after sludge discharge.

The invention discloses a microbial organic fertilizer for improving the soil that has been used for planting multi-batch vegetable and fruit and a preparation method thereof. The microbial organic fertilizer is prepared by mixing a specially-made microbial composite inoculant, manure, and edible fungus residues according to a certain ratio and then subjecting the mixture to aerobic fermentation. The microbial chelating agent is prepared by mixing microbial floras, a culture liquid, and a heavy metal passivating material according to a weight ratio of 1:7:12. Through an aerobic composting technology, and the cooperative effect between microorganisms and a heavy metal passivating material, accumulated heavy metals in soil and manure are efficiently passivated, the output of fruit and vegetable is prominently increased, the labor cost is reduced, the harmless treatment of livestock and cattle manure compost is realized, and a high quality composite microbial organic fertilizer is provided.

The invention provides a heavy metal ion passivation stabilizer for flowback fluid treatment residues and a preparation method. The stabilizer is prepared from the following components in percentage by weight: 0.5-1 percent of sodium sulfide, 20-30 percent of monopotassium phosphate, 10-15 percent of dithiocarbamate and 55-65 percent of a heavy metal adsorbent. Wherein the heavy metal adsorbent comprises lysimachia foenum-graecum and mushroom dregs. According to the heavy metal ion passivation stabilizer, the mobility of heavy metal ions in the environment can be reduced, the toxicity of the heavy metal ions to microorganisms is inhibited, the stabilizing efficiency of Cu, Zn, Cd, Pb, Hg and Ni reaches 88% or above to the minimum and the stabilizing efficiency of Cr reaches 83% or above tothe minimum after the heavy metal ion passivation stabilizer formula provided by the invention is applied to treatment of oil field measure flowback fluid treatment residues for 7 days.

The invention relates to a mudflat saline-alkali land soil conditioner on the basis of using fermentation bed chicken farm wastes as raw materials and a preparation method thereof and application thereof. The mudflat saline-alkali land soil conditioner on the basis of using the fermentation bed chicken farm wastes as the raw materials comprises the following components of 75-85 parts of fermentation bed chicken farm wastes, 5-15 parts of crop straws, 2 parts of quick lime, 1 part of gypsum and 7 parts of wormcast in parts by weight. The mudflat saline-alkali land soil conditioner on the basisof using the fermentation bed chicken farm wastes as the raw materials, provided by the invention, has the advantages that technical bottlenecks of fermentation bed chicken farm waste resource utilization and mudflat saline-alkali land soil rapid conditioning are effectively solved; by combining the fermentation bed chicken farm wastes with the crop straws and the wormcast, the formation of mudflat soil aggregates can be effectively promoted, soil salinization can be inhibited, the pH value of the soil is reduced, organic matters and nutrients N and P in the soil are increased, soil structureconditioning and fertilization of the mudflat saline-alkali land are effectively promoted, and guarantee is provided for domestic agricultural land reserve resources.

The invention relates to a preparation method of a ginseng root soil microenvironment balance regulator. The method comprises the following steps: 1, producing a nano-material; 2, preparing a CuO gaseous condensate root balancing agent; 3, preparing a CO2 gaseous condensate root balancing agent; 4, preparing a ZnO gaseous condensate root balancing agent; 5, preparing a CH3 gaseous condensate rootbalancing agent; and 6, uniformly mixing 3-5 wt% of the CO2 gaseous condensate root balancing agent, 6-10 wt% of the ZnO gaseous condensate root balancing agent, 8-12 wt% of the CuO gaseous condensateroot balancing agent and 13-17 wt% of the CH3 gaseous condensate root balancing agent with water to prepare the ginseng root soil microenvironment balance regulator. The balance regulator has the advantages of no generation of non-degradable toxic organic matters methylene groups in soil, no accumulated harms to the health of human, no rise of pesticide residue accumulation in soil year by year,no soil hardening salination, regulation of the virtuous circle of the soil, no side effects or ecology destroy, safety and harmlessness.