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Novel heavy metal repairing agent used for soil

A technology of heavy metals and repair agents, applied in the direction of soil conditioning materials, applications, organic fertilizers, etc., can solve problems such as not easy to degrade, and achieve good removal effect and low chemical consumption

Inactive Publication Date: 2015-11-18
HUNAN JICHANG SILK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the biggest disadvantage of these complexing agents is that they are not easy to degrade and cause organic pollutants, so now the market is in great need of a composite restoration agent that can not only remove heavy metals, but also has biodegradability

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A novel heavy metal remediation agent for soil, in parts by weight, consists of the following components:

[0018] Activated carbon fiber: 10, citric acid: 5, ethylenediamine disuccinic acid: 5,

[0019] Thiocyanamide: 10, Chitosan: 10, Diatomaceous Earth: 5,

[0020] Molecular sieve: 5, sodium carbonate: 5, fly ash: 5,

[0021] Monochloroacetic acid: 1, calcium hydroxide: 10.

[0022] The preparation process of the novel heavy metal restoration agent is as follows: according to the proportion, after mixing the components, stirring and dispersing evenly, the finished product can be obtained.

[0023] The novel heavy metal restoration agent of the invention can be used to remove heavy metals in soil, and the dosage is controlled at 30-35mg / g.

Embodiment 2

[0025] A novel heavy metal remediation agent for soil, in parts by weight, consists of the following components:

[0026] Activated carbon fiber: 15, citric acid: 8, ethylenediamine disuccinic acid: 8,

[0027] Thiocyanamide: 12, Chitosan: 13, Diatomaceous Earth: 8,

[0028] Molecular sieve: 8, sodium carbonate: 8, fly ash: 8,

[0029] Monochloroacetic acid: 3, calcium hydroxide: 13.

[0030] The preparation process of the novel heavy metal restoration agent is as follows: according to the proportion, after mixing the components, stirring and dispersing evenly, the finished product can be obtained.

[0031] The novel heavy metal restoration agent of the invention can be used to remove heavy metals in soil, and the dosage is controlled at 30-35mg / g.

Embodiment 3

[0033] A novel heavy metal remediation agent for soil, in parts by weight, consists of the following components:

[0034] Activated carbon fiber: 20, citric acid: 10, ethylenediamine disuccinic acid: 10,

[0035] Thiocyanamide: 15, Chitosan: 15, Diatomaceous Earth: 10,

[0036] Molecular sieve: 10, sodium carbonate: 10, fly ash: 10,

[0037] Monochloroacetic acid: 5, calcium hydroxide: 15.

[0038] The preparation process of the novel heavy metal restoration agent is as follows: according to the proportion, after mixing the components, stirring and dispersing evenly, the finished product can be obtained.

[0039] The novel heavy metal restoration agent of the invention can be used to remove heavy metals in soil, and the dosage is controlled at 30-35mg / g.

[0040] Compared with the prior art, the remarkable feature of the present invention is that it can not only achieve less drug consumption and good removal effect, but also has the advantage of easy biodegradation.

[004...

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PUM

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Abstract

The invention discloses a novel heavy metal repairing agent used for soil. A technical scheme adopted in the invention is as follows: the novel heavy metal repairing agent used for the soil is composed of the following components by weight: 10 to 20 parts of activated carbon fiber, 5 to 10 parts of citric acid, 5 to 10 parts of ethylenediaminedisuccinic acid, 10 to 15 parts of amide thiocyanate, 10 to 15 parts of chitosan, 5 to 10 parts of diatomite, 5 to 10 parts of molecular sieves, 5 to 10 parts of sodium carbonate, 5 to 10 parts of fly ash, 1 to 5 parts of chloroacetic acid and 10 to 15 parts of calcium hydroxide, wherein dosage is controlled to be 30 to 50mg / g. Compared with prior art, the novel heavy metal repairing agent used for the soil provided by the invention has the significant characteristics of small agent-consumption amount, good removal effect and an advantage of easy biodegradation.

Description

technical field [0001] The invention relates to the technical field of heavy metal repairing agents for soil, in particular to a repairing agent for removing heavy metals in soil used in technical fields such as textiles, printing and dyeing. Background technique [0002] In industries such as textile and printing and dyeing, because more waste water, waste residues and other wastes are generated in the production process, these wastes are discharged into the soil, which will cause great pollution to the soil. The heavy metals that cause soil pollution mainly include mercury (Hg), cadmium (Cd), lead (Pb), chromium (Cr) and metalloid arsenic (As) and other elements with significant biological toxicity, as well as certain toxic elements such as zinc (Zn), Copper (Cu), nickel (Ni) and other elements. Mainly come from pesticides, wastewater, sludge and atmospheric deposition, etc. For example, mercury mainly comes from mercury-containing wastewater, cadmium and lead pollution m...

Claims

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Application Information

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IPC IPC(8): C09K17/40
Inventor 董荣琴
Owner HUNAN JICHANG SILK
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