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Additive applied to polluted soil

A technology of polluted soil and additives, applied in the fields of application, soil conditioning materials, organic fertilizers, etc., can solve the problems of lack of biological additives, achieve fast stabilization speed, good stabilization effect, and enhance the effect of long-term stabilization

Inactive Publication Date: 2015-03-25
SOOCHOW KH BIO SCI & TECH CO LTD KHB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Although a variety of heavy metal stabilizers for polluted soils have been disclosed in the prior art and have achieved different effects, the treatment objects of these stabilizers are all heavy metals in the soil, and the heavy metals and organic matter in these media and their Biological additives for compound pollution are still lacking

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044]Soak the sepiolite in 1 mol / l hydrochloric acid blister solution, rinse it with deionized water to neutrality, and dry it; then infiltrate it with 1 mol / l FeCl3 solution, so that its cation exchange capacity is all saturated with ferric ions, After washing with deionized water to remove the excess ions in the non-static adsorption state on the surface of the particles, the ferric ions are reduced to zero-valent iron with NaBH4 reducing agent to obtain nano-iron-supported clay minerals.

[0045] Stabilization treatment of certain metal-contaminated soil

[0046] In a small electroplating factory, the heavy metals in the soil of the site mainly include chromium and lead, with the highest concentrations of 841mg / kg and 632mg / kg. After the pollution scope and depth were determined by testing, the excavator was used to reduce the pollution and the soil was temporarily excavated next to the site. On the plots with anti-seepage materials, the soil is screened and crushed by a s...

Embodiment 2

[0049] Soak the sepiolite in 1 mol / l hydrochloric acid blister solution, rinse it with deionized water to neutrality, and dry it; then infiltrate it with 1 mol / l FeCl3 solution, so that its cation exchange capacity is all saturated with ferric ions, After washing with deionized water to remove the excess ions in the non-static adsorption state on the surface of the particles, the ferric ions are reduced to zero-valent iron with NaBH4 reducing agent to obtain nano-iron-supported clay minerals.

[0050] Stabilization treatment of certain metal-contaminated soil

[0051] In a small electroplating factory, the heavy metals in the soil of the site mainly include chromium and lead, with the highest concentrations of 841mg / kg and 632mg / kg. After the pollution scope and depth were determined by testing, the excavator was used to reduce the pollution and the soil was temporarily excavated next to the site. On the plots with anti-seepage materials, the soil is screened and crushed by a ...

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PUM

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Abstract

The invention discloses an additive applied to polluted soil. The additive comprises, in parts by mass, 30-40 parts of a clay mineral, 20-30 parts of a supporting type clay mineral, 12-13 parts of a molecular sieve ore, 6-8 parts of apatite, 4-9 parts of an iron oxide, 6-9 parts of a gel material, 3-6 parts of an activator, 6-15 parts of a reducing degradation agent and 1-6 parts of an auxiliary material. The additive can stabilize heavy metals and organic matters in the soil quickly and efficiently under the synergistic action of various effective components and can further decrease the content of the organic matters, so that the leaching toxicity of pollutants is reduced, the risk is reduced, and the additive has the broad application prospect in the field of treatment of the polluted soil and the like.

Description

technical field [0001] The invention relates to the field of environmental protection treatment and protection, in particular to a biological additive applied to polluted soil. Background technique [0002] During the long-term mining, smelting and industrialization process, China has accumulated serious heavy metal and organic pollution. With the acceleration of industrial structure adjustment and the rapid recommendation of the urbanization process, the pollutants left after the relocation of a large number of industrial enterprises have been exposed. It poses a serious threat to the environment and human health, and urgently needs to be treated and restored before the land can be reused. [0003] On the other hand, heavy metals and organic matter in polluted rivers and lakes end up in sediments through long-term physicochemical processes and biological processes, and these sediments face the problem of proper disposal and placement after dredging. [0004] On the other h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/08C09K103/00
CPCC09K17/08C09K2103/00
Inventor 金京勋
Owner SOOCHOW KH BIO SCI & TECH CO LTD KHB
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