Soil repairing agent used for soil polluted by chromium, cadmium and arsenic and preparation method thereof

A soil remediation agent and arsenic-polluted technology, applied in the field of soil remediation, can solve the problems of low efficiency, poor remediation effect, limited promotion and use, etc.

Inactive Publication Date: 2016-03-23
JIANGSU GAIYA ENVIRONMENTAL SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional soil remediation agents have limited their promotion

Method used

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  • Soil repairing agent used for soil polluted by chromium, cadmium and arsenic and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0022] A preparation method for a soil remediation agent for chromium, cadmium and arsenic contaminated soil, comprising the following preparation steps:

[0023] (1) Weigh by weight: 20 parts of dimercaptopropanol, 9 parts of cobalt ferrite, 7 parts of bismuth phosphate, 2 parts of tungsten oxide, 5 parts of hexahydroxy sodium antimonate, 3 parts of sepiolite, oxidized sophora fruit 4 parts of alkali, 3 parts of calcium chloride, 5 parts of potassium citrate, 2 parts of 1,3-diketone, 6 parts of palmitic acid, 5 parts of diatomaceous earth and 8 parts of glucono-δ-lactone; The average particle diameter of sepiolite is 300 mesh, and the density of described diatomite is 1.3g / cm 3 , the particle size is 250 mesh;

[0024] (2) Grind the sepiolite and diatomaceous earth to 200 mesh, set aside;

[0025] (3) Mix dimercaptopropanol, tungsten oxide, bismuth phosphate, sodium hexahydroxyantimonate, potassium citrate, palmitic acid, glucono-delta-lactone and the abrasive in step (2) a...

Embodiment 2

[0028] A preparation method for a soil remediation agent for chromium, cadmium and arsenic contaminated soil, comprising the following preparation steps:

[0029] (1) Weigh by weight: 30 parts of dimercaptopropanol, 16 parts of cobalt ferrite, 15 parts of bismuth phosphate, 5 parts of tungsten oxide, 14 parts of hexahydroxy sodium antimonate, 10 parts of sepiolite, oxidized sophora fruit 12 parts of alkali, 9 parts of calcium chloride, 10 parts of potassium citrate, 7 parts of 1,3-diketone, 13 parts of palmitic acid, 17 parts of diatomaceous earth and 15 parts of glucono-δ-lactone; The average particle diameter of sepiolite is 300 mesh, and the density of described diatomite is 1.8g / cm 3 , the particle size is 250 mesh;

[0030] (2) Grind the sepiolite and diatomaceous earth to 100 mesh, set aside;

[0031] (3) Mix dimercaptopropanol, tungsten oxide, bismuth phosphate, sodium hexahydroxyantimonate, potassium citrate, palmitic acid, glucono-delta-lactone and the abrasive in s...

Embodiment 3

[0034] A preparation method for a soil remediation agent for chromium, cadmium and arsenic contaminated soil, comprising the following preparation steps:

[0035] (1) Weigh by weight: 25 parts of dimercaptopropanol, 12 parts of cobalt ferrite, 11 parts of bismuth phosphate, 3 parts of tungsten oxide, 10 parts of hexahydroxy sodium antimonate, 6 parts of sepiolite, oxidized sophora fruit 8 parts of alkali, 6 parts of calcium chloride, 7 parts of potassium citrate, 4 parts of 1,3-diketone, 10 parts of palmitic acid, 11 parts of diatomaceous earth and 12 parts of glucono-δ-lactone; The average particle diameter of sepiolite is 300 mesh, and the density of described diatomite is 1.5g / cm 3 , the particle size is 250 mesh;

[0036] (2) Grind the sepiolite and diatomaceous earth to 150 mesh, set aside;

[0037] (3) Mix dimercaptopropanol, tungsten oxide, bismuth phosphate, sodium hexahydroxyantimonate, potassium citrate, palmitic acid, glucono-δ-lactone and the abrasive in step (2)...

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Abstract

The invention provides a soil repairing agent used for soil polluted by chromium, cadmium and arsenic and a preparation method thereof. The soil repairing agent is composed of, by weight, 20-30 parts of dimercaptopropanol, 9-16 parts of cobalt ferrite, 7-15 parts of bismuth phosphate, 2-5 parts of tungsten oxide, 5-14 parts of hexahydroxyl sodium antimonate, 3-10 parts of sepiolite, 4-12 parts of oxidized sophocarpine, 3-9 parts of calcium chloride, 5-10 parts of potassium citrate, 2-7 parts of 1,3-dione, 6-13 parts of palmitic acid, 5-17 parts of diatomite, and 8-15 parts of glucono-[delta]-lactone. The soil repairing agent can reduce the concentration of chromium to lower than 18.7 mg/kg, the concentration of cadmium to lower than 23.6 mg/kg and the concentration of arsenic to lower than 21.9 mg/kg in polluted soil when being used for repairing soil. Heavy metal concentration of the repaired soil satisfies the demand of national grade-II soil quality standard.

Description

technical field [0001] The invention belongs to the field of soil remediation, and in particular relates to a soil remediation agent for chromium, cadmium and arsenic polluted soil and a preparation method thereof. Background technique [0002] Heavy metals in polluted soil mainly include mercury, cadmium, lead, chromium and metalloid arsenic and other elements with significant biological toxicity. Heavy metals cannot be decomposed by microorganisms. Heavy metals themselves have poor mobility and can easily enter and accumulate in the human body through the food chain, endangering human health. In addition, heavy metals may also be transformed into substances that are more harmful to the human body and bring greater harm. [0003] The main principles of the remediation method of heavy metal-contaminated soil are: converting into low-toxic substances to reduce their toxicity, changing the form of heavy metals in the soil, and completely removing heavy metals. The main remedi...

Claims

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Application Information

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IPC IPC(8): C09K17/40
CPCC09K17/40
Inventor 程功弼仲英豪
Owner JIANGSU GAIYA ENVIRONMENTAL SCI & TECH CO LTD
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