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Remediation agent and remediation method for heavy metal contaminated soil

A technology that pollutes soil and heavy metals, applied in the field of soil remediation, can solve the problems of high cost and poor effect

Inactive Publication Date: 2020-07-03
WEIFANG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional physical and chemical technologies such as soil replacement method, vitrification technology, chemical leaching, and chemical fixation can achieve certain repair effects, but there are generally disadvantages such as high cost and poor effect.

Method used

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  • Remediation agent and remediation method for heavy metal contaminated soil
  • Remediation agent and remediation method for heavy metal contaminated soil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] 2 parts of humic acid, 5 parts of succinic acid, 5 parts of sawdust, 2 parts of bentonite, 10 parts of sodium polyacrylate, 5 parts of briquette ash, 5 parts of seaweed residue, 2 parts of zeolite, 5 parts of nano hydrogel, 10 parts of biochar , 10 parts of Fe-Mn binary oxide, 5 parts of sodium pyrophosphate, 2 parts of microbial mixed bacteria.

[0051] Among them, the nano-hydrogel is selected from the mixture of amide-based nano-hydrogel, cationic guar gum, and sulfonic-acid-based nano-hydrogel; the biochar is selected from rice husk charcoal, straw charcoal, cow dung charcoal, and pig manure charcoal; microbial mixed bacteria Selection: Desulfurization Bacillus subtilis, sodium polyacrylate reducing bacteria, discoid spiral cyanobacteria, white rot fungi, Shewanella putrefaction mixed, Fe-Mn binary oxides contain hematite.

[0052] Add the restoration agent to the soil polluted by heavy metals, then plow down the soil contaminated by heavy metals for the first time ...

Embodiment 2

[0054] 16 parts of humic acid, 10 parts of succinic acid, 20 parts of sawdust, 10 parts of bentonite, 20 parts of sodium polyacrylate, 10 parts of briquette ash, 20 parts of seaweed residue, 10 parts of zeolite, 10 parts of nano hydrogel, 30 parts of biochar , 20 parts of Fe-Mn binary oxide, 10 parts of sodium pyrophosphate, 14 parts of trace element fertilizer, and 10 parts of microbial mixed bacteria.

[0055] Among them, the nano-hydrogel chooses amide-based nano-hydrogel mixed with cationic guar gum; the biochar chooses rice husk charcoal mixed with pig manure charcoal; the choice of trace element fertilizer: 26 parts of chelated zinc, 10 parts of chelated iron, chelated 12 parts of magnesium alloy, 10 parts of chelated copper, 8 parts of organic matter; microbial mixture selection: Bacillus subtilis desulfurum, sodium polyacrylate reducing bacteria, discoid spiral cyanobacteria, Shewanella putrefaction mixed.

[0056] Add the restoration agent to the soil polluted by heav...

Embodiment 3

[0058] 8 parts of humic acid, 7 parts of succinic acid, 15 parts of sawdust, 5 parts of bentonite, 15 parts of sodium polyacrylate, 7 parts of briquette ash, 15 parts of seaweed residue, 6 parts of zeolite, 7 parts of nano hydrogel, 20 parts of biochar , 15 parts of Fe-Mn binary oxide, 7 parts of sodium pyrophosphate, 12 parts of trace element fertilizer, 6 parts of microbial mixed bacteria.

[0059] Among them, nano-hydrogels choose amide-based nano-hydrogels and sulfonic acid-based nano-hydrogels; biochars choose rice husk charcoal, cow dung charcoal, and pig manure charcoal; trace element fertilizers: 20 parts of chelated zinc, chelated 7 parts of iron, 10 parts of chelated magnesium, 9 parts of chelated copper, 7 parts of organic matter; microbial mixed bacteria selection: discoid spiral cyanobacteria, white rot fungus and Shewanella putrefaction, Fe-Mn binary oxide contains Hematite.

[0060] Add the restoration agent to the soil polluted by heavy metals, then plow down ...

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Abstract

The invention relates to the technical field of soil remediation, in particular to a remediation agent and remediation method for heavy metal contaminated soil. The remediation agent for the heavy metal contaminated soil comprises 2-16 parts of humic acid, 5-10 parts of succinic acid, 5-20 parts of sawdust, 2-10 parts of bentonite, 10-20 parts of sodium polyacrylate, 5-10 parts of honeycomb briquette ash, 5-20 parts of seaweed residues, 2-10 parts of zeolite, 5-10 parts of nano hydrogel, 10-30 parts of charcoal, 10-20 parts of Fe-Mn binary oxide, 5-10 parts of sodium pyrophosphate and 2-10 parts of microorganism mixed bacteria. The remediation agent is good in repairing effect and low in cost. The remediation method for remediating the heavy metal contaminated soil through the remediationagent is simple, heavy metal in the soil can be efficiently solidified, and the water quality grade of the soil penetrating fluid is improved.

Description

technical field [0001] The invention relates to the technical field of soil remediation, in particular to a remediation agent and a remediation method for heavy metal polluted soil. Background technique [0002] Soil pollution has become one of the main factors restricting the sustainable development of human society, and it is a current and long-term challenge faced by countries all over the world. The main causes of soil pollution are excessive use of chemical fertilizers and chemical pesticides, improper disposal of various sewage, sludge and organic waste, accidental discharge of harmful substances, and long-term accumulation of various pollutants in the soil. Soil pollution causes secondary pollution to groundwater and surface water, and enters the human body through the food chain through drinking water or soil-plant systems, endangering human health. [0003] Excessive heavy metals in the soil will cause pollution, which poses a great threat to crop growth and human ...

Claims

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Application Information

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IPC IPC(8): C05G3/00C05G3/80B09C1/08
CPCB09C1/08B09C2101/00C05B7/00C05G3/00
Inventor 冯棣
Owner WEIFANG UNIV OF SCI & TECH
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