A remediation agent suitable for arsenic-contaminated soil and its application method

A remediation agent, arsenic pollution technology, applied in the restoration of polluted soil, soil conditioning materials, chemical instruments and methods, etc., can solve the problems of high cost, unstable properties, difficult to obtain nano titanium dioxide, etc. The effect of increasing soil fertility

Active Publication Date: 2017-12-22
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, nano-titanium dioxide is not easy to prepare, has unstable properties, and high cost, so it is not suitable for large-scale use

Method used

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  • A remediation agent suitable for arsenic-contaminated soil and its application method
  • A remediation agent suitable for arsenic-contaminated soil and its application method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0032] Grind the raw materials calcium carbide slag, organic alkali, sodium hypochlorite, ferrous chloride, and mushroom planting waste into materials with a particle size of 10-100 mesh, and weigh according to mass percentage: calcium carbide slag 20%, organic alkali 6%, sodium hypochlorite 29%, chlorine 40% of ferrous chloride and 5% of mushroom planting waste can obtain the repairing agent.

Embodiment 3

[0034] Grind the raw materials carbide slag, organic alkali, sodium hypochlorite, hydrogen peroxide, sodium persulfate, ferrous chloride, ferric chloride, ferrous sulfate, and mushroom planting waste into materials with a particle size of 10-100 mesh, and grind the calcium carbide slag and organic alkali according to Mix the mass ratio of 3:1 to form component A, mix sodium hypochlorite, hydrogen peroxide, and sodium persulfate in any proportion to form component B, and mix ferrous chloride, ferric chloride, and ferrous sulfate in any proportion to form component C, mushroom cultivation waste is component D, weighed again by mass percentage: component A is 15%, component B is 30%, component C is 30%, component D is 25%, promptly obtains described Restoration Potion.

[0035] On the basis of Example 3, by changing the composition of components A, B, and C, many examples can be evolved.

Embodiment 1

[0037] Take 1 kg of contaminated soil, and use the heavy metal detection method stipulated in the "Soil Environmental Quality Standard" (GB 15618-1995) to determine the content of arsenic in the soil sample, and the maximum detection content is 1000 mg / kg.

[0038] According to the test result, take by weighing 50 g of the repairing agent given in "Example 1 of the repairing agent", first add the pH value regulating agent, stir evenly, and leave it for 3 hours to obtain soil with a pH value of 8; Add the above-mentioned mass percentage of oxidant to the polluted soil, stir evenly, and let it stand for 1 hour; add the above-mentioned mass percentage of mineralizer to the oxidized contaminated soil, and stir evenly; add the above-mentioned mass percentage of complexing agent, stir well, and adjust the water content of the soil 50% rate, natural cultivation for 3 days;

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Abstract

The invention discloses a remediation agent suitable for arsenic-contaminated soil and a method of use. The remediation agent comprises the following raw materials, whose mass percentages are: pH regulator 10-40%; oxidant 5-30%; mineralizer 15% -40%; complexing agent 5-25%; each raw material is ground into a material with a particle size of 10-100 mesh. The method of using the remediation agent for treating arsenic-contaminated soil: detecting the arsenic content of the polluted soil to be treated, weighing different proportions of the remediation agent according to the degree of pollution, and sequentially adding a pH adjuster, an oxidant, a mineralizer and a complexing agent , adding water to keep the moisture content of the mixed soil at 20-50%, curing time of 3-7 days, and testing to meet environmental protection requirements after curing. The invention has abundant raw materials, low price and simple use method, and is suitable for large-scale popularization and application.

Description

technical field [0001] The invention belongs to the field of environmental protection, and in particular relates to a restoration method suitable for arsenic-contaminated soil in arsenic production enterprises. Background technique [0002] Arsenic exists widely in nature and is a carcinogenic toxic substance that can cause chronic arsenic poisoning in humans, skin damage, hepatosplenomegaly and even malignant tumors. Arsenic sulfide slag mainly comes from smelting waste slag, arsenic-containing wastewater and waste acid residue, etc., which is an important source of environmental arsenic pollution. On December 15, 2004, the World Health Organization announced that at least 50 million people around the world are facing the hazards of endemic arsenic poisoning, most of whom are in Asian countries, and my country is one of the countries most seriously affected by arsenic. [0003] There are many arsenic-contaminated soil remediation technologies commonly used at home and abro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09C1/00B09C1/08C09K17/00C09K109/00
Inventor 吴烈善莫小荣蒙惠琴曾东梅咸思雨孔德超
Owner GUANGXI UNIV
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