Selenium-containing soil heavy metal restoration agent

A technology of heavy metals and remediation agents, applied in the field of soil remediation, can solve the problems of reduced antioxidant enzyme activity, destruction of antioxidant systems, soil recontamination, etc., to reduce bioavailability, increase soil organic fertility, and strengthen the effect of fixing effect.

Inactive Publication Date: 2016-09-28
凤阳徽亨商贸有限公司
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  • Abstract
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Problems solved by technology

Heavy metal elements are easy to combine with the sulfhydryl group in the active part of the enzyme, and the metal element will replace the essential elements in the sulfur protein, such as Mg2+, Ca2+ and other biologically necessary elements. The antioxidant system in the system wreaks havoc
[0004] At present, the remediation technology of heavy metal-contaminated soil mainly adopts chemical means, but a large number of chemical agents used in the remediation process can easily cause soil re-pollution

Method used

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  • Selenium-containing soil heavy metal restoration agent
  • Selenium-containing soil heavy metal restoration agent

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Embodiment Construction

[0022] A selenium-containing soil heavy metal remediation agent is made of the following raw materials in parts by weight (kg): lentinan 4, sodium selenite 2, chitosan 4, grass powder 16, pig bone meal 8, vinegar grains 25, nitric acid Potassium 6, seedless sunflower plate 82, silkworm sand 32, kaolin 15, calcium carbonate 4, slash pine needles 27, water as appropriate.

[0023] The concrete steps of the preparation of described soil heavy metal restoration agent are as follows:

[0024] (1) Dry the seedless sunflower dish and silkworm excrement in the sun, crush them, put them in an oven and dry them at 50°C for 11 hours. Raise the temperature to 500°C and keep it warm for 80 minutes, then take it out when the temperature drops to 68°C to obtain biochar;

[0025] (2) Put kaolin and calcium carbonate in a calciner after being mixed, calcined at 600° C. for 40 minutes, take it out after cooling to room temperature, and obtain a calcined powder for later use;

[0026] (3) Mix ...

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Abstract

The invention discloses a selenium-containing soil heavy metal restoration agent, which is prepared from the following raw materials (by weight): 4-5 parts of lentinan, 2-3 parts of sodium selenite, 4-6 parts of chitosan, 16-18 parts of pasture powder, 8-10 parts of pig bone meal, 25-26 parts of vinegar residue, 6-7 parts of potassium nitrate, 82-88 parts of seeded sunflower disc, 32-36 parts of silkworm excrement, 15-18 parts of kaolin, 4-5 parts of calcium carbonate, 27-28 parts of slash pine needle and a proper amount of water. By using sodium selenite as exogenous selenium and by matching of lentinan, chitosan and the like, activity of urease and sucrose in soil can be increased, and the effect of increasing organic fertility of soil is further achieved. Meanwhile, with the addition of selenium, content of organically-bound heavy metal in soil is also decreased, soil immobilization effect of heavy metal especially mercury is enhanced, and bio-availability of soil heavy metal is further reduced. The product is used for restoration and improvement of soil quality.

Description

technical field [0001] The invention relates to the technical field of soil restoration, in particular to a soil heavy metal restoration agent containing selenium. Background technique [0002] The sources of heavy metal pollution in my country mainly include industrial "three wastes" discharge, seepage of household garbage, household coal burning, and vehicle exhaust emissions. Industries such as electroplating, plastics, chemicals, and mineral smelting and processing are the main industrial sources of heavy metals. The release of coal combustion is also one of the important causes of soil heavy metal pollution. Motor vehicle exhaust can also significantly cause heavy metal pollution in the soil on both sides of the road. The content of some heavy metal elements in municipal solid waste exceeds the standard, and long-term stacking will also cause heavy metals to leak into the soil, resulting in an increase in local heavy metal content in regional soil. In addition, the lon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/40
CPCC09K17/40
Inventor 张波
Owner 凤阳徽亨商贸有限公司
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