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Biochemical compound soil heavy metal pollution fixed remediation agent and application

A biochemical and fixed restoration technology, applied in the restoration, application, soil conditioning materials and other directions of polluted soil, can solve problems such as limiting the application of heavy metal treatment in soil, and achieve a short period of treatment of heavy metal pollution, strong operability, and a preparation method. simple effect

Active Publication Date: 2016-11-23
GUANGDONG GEOLONG BIOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The material prepared by this method has a good adsorption and chelation effect on cadmium ions. It is used for the treatment of cadmium-containing wastewater. It can not only make the wastewater discharge up to the standard, but also recover the cadmium ions in the water. Due to the strong hydrogen bonding between chitosan and chitosan, it can only be dissolved in acidic environment, which greatly limits the application in soil heavy metal treatment, so it needs to be combined with other adsorption materials to solve this problem

Method used

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  • Biochemical compound soil heavy metal pollution fixed remediation agent and application
  • Biochemical compound soil heavy metal pollution fixed remediation agent and application
  • Biochemical compound soil heavy metal pollution fixed remediation agent and application

Examples

Experimental program
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Effect test

Embodiment 1

[0030] The experimental soil was taken from the 0-25cm soil layer soil of a vegetable field polluted by heavy metals in a suburb of Guangzhou City. The effective state adopts the DTPA-TEA method, and the soil As effective state is measured by 0.5ml.L-1NaHCO 3 Leaching method; the mass ratio of each raw material used to treat the soil is mercapto bentonite (montmorillonite: sepiolite=3:1, and it is formed through mercapto modification, any conventional mercapto modification technology can be used, the same below ): zeolite (120 mesh): iron powder (120 mesh): mercapto chitosan (90% food grade chitosan modified by thioglycolic acid): photosynthetic bacteria: actinomycetes: yeast: lactic acid bacteria [wherein photosynthetic The bacteria are Rhodopseudomonas palustris (strain number CICC 23812); It is an industrial strain of Enterococcus faecalis (strain preservation number: CICC 20422), purchased from the China Industrial Microorganism Culture Collection Center, and formed throu...

Embodiment 2

[0035] The experimental soil was taken from the soil 20-25cm below the surface layer polluted by heavy metals near a battery factory in Dongguan City. The effective state adopts the DTPA-TEA method, and the soil As effective state is measured by 0.5ml.L-1NaHCO 3Leaching method; the mass ratio of each raw material used to treat the soil is mercapto bentonite (montmorillonite: sepiolite=3:1, and modified by mercapto): zeolite (120 mesh): iron powder (120 mesh) : Mercapto-chitosan (90% food-grade chitosan modified by thioglycolic acid): Photosynthetic bacteria: Actinomycetes: Saccharomyces: Lactic acid bacteria [wherein the photosynthetic bacteria is Rhodopseudomonas palustris (strain number CICC 23812) ; Actinomycetes is Nocardia corals (bacterial strain number CICC 23623); Yeast is Candida tropicalis (bacterial strain preservation number: CICC 1253); Lactic acid bacteria is the industry of Enterococcus faecalis (bacterial strain preservation number: CICC 20422) Bacteria, purch...

Embodiment 3

[0039] The experimental soil was taken from the soil 20-25 cm below the surface of a mining area polluted by heavy metals in a suburb of Heshan City, Guangdong Province. The effective state adopts the DTPA-TEA method, and the soil As effective state is measured by 0.5ml.L-1NaHCO 3 Leaching method; the mass ratio of each raw material used to treat the soil is mercapto bentonite (montmorillonite: sepiolite=3:1, and modified by mercapto): zeolite (120 mesh): iron powder (120 mesh) : Mercapto-chitosan (90% food-grade chitosan modified by thioglycolic acid): Photosynthetic bacteria: Actinomycetes: Saccharomyces: Lactic acid bacteria [wherein the photosynthetic bacteria is Rhodopseudomonas palustris (strain number CICC 23812) ; Actinomycetes is Nocardia corals (bacterial strain number CICC 23623); Yeast is Candida tropicalis (bacterial strain preservation number: CICC 1253); Lactic acid bacteria is the industry of Enterococcus faecalis (bacterial strain preservation number: CICC 204...

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Abstract

The invention provides a biochemical compound soil heavy metal pollution fixed remediation agent and application, and belongs to the technical field of soil heavy metal pollution control and remediation. The preparing raw materials include sulfydryl bentonite, sulfydryl chitosan, zeolite, iron powder, photosynthetic bacteria, actinomycetes, saccharomycetes and lactic acid bacteria by the weight ratio of 35-65%: 33-52%: 1-8%: 0.2-1%: 0.2-1%: 0.2-1%:0.2-1%:0.2-1%. The fixed remediation agent is effective for unitary or combined heavy metal pollution soil, reduces the effective state and mobility of heavy metal in the soil and therefore ensures safety of soil and plant production, wherein pollution metal includes cadmium, chromium, copper, zinc, mercury, arsenic and lead. The used materials are wide in source, low in cost, remarkable in repair effect and free of secondary pollution, and the fixed remediation agent is environment-friendly soil heavy metal passivation and remediation agent.

Description

technical field [0001] The invention relates to a soil heavy metal pollution fixing and repairing agent and its application, in particular to a biochemical composite soil heavy metal pollution fixing and repairing agent and its application, belonging to the technical field of soil heavy metal pollution control and repair. Background technique [0002] With the rapid development of industry and agriculture and the acceleration of urbanization, the land is suffering more and more pollution. Among them, data show that the world's average annual emissions of about 15,000 tons of Hg, 3.4 million tons of Cu, and 5 million tons of Pb 15 million tons of Mn enter the soil environment through different channels. Since these substances are difficult to be degraded by nature, when they accumulate to a certain extent, they will lead to soil degradation, decline in the quality of agricultural products, and further endanger human health, especially in the recent Some of the soil safety inc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/40B09C1/08
CPCB09C1/08B09C2101/00C09K17/40
Inventor 庄会德林李华温书恒支胡钰
Owner GUANGDONG GEOLONG BIOTECH
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