Preparation method of soil heavy metal curing detoxicant

A technology for heavy metals and antidote, applied in the field of environment and resources, can solve problems such as unfavorable soil compaction, mineral substance entry, and unfavorable soil ecological environment improvement, and achieve the effect of easy capture and increased surface area.

Active Publication Date: 2015-07-01
SHANGHAI GUANFA MARINE BIOTECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Most of the existing heavy metal solidification antidotes use minerals as adsorption and chelation materials. Too much minerals enter the soil

Method used

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  • Preparation method of soil heavy metal curing detoxicant
  • Preparation method of soil heavy metal curing detoxicant
  • Preparation method of soil heavy metal curing detoxicant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] This example involves the use of medical chitin (produced by Zhejiang Jinke Biochemical Co., Ltd.) as a raw material for the production of soil heavy metal solidification antidotes. The chitin is pulverized to 200 mesh with a ball mill, and the weight ratio of part of the dissolving agent to the pulverized chitin is 100. 20, with a total weight of 14 kg, put it into a 10-liter reactor, dissolve at 95°C for 1 hour, adjust the pH value to 5.0 with neutralizing solution, add chitin and acylation preparation at a ratio of 100:0.01, and stir at 30°C Acylation reaction at low temperature for 6 hours, after that, add glutaraldehyde according to the ratio of chitin and cross-linking agent 100:0.1, stir at 50°C for 3 hours for cross-linking reaction, finish the reaction, dry, crush to 150 mesh, pack .

Embodiment 2

[0027] This embodiment involves the use of agricultural chitin (produced by Dalianguanfa Pharmaceutical Co., Ltd.) as a raw material for the production of soil heavy metal solidification antidotes. The difference between agricultural chitin and medical chitin is that agricultural chitin contains 10-15% of other organic matter, and the cost ratio Medical chitin is low. Use a ball mill to crush the raw material to 50 mesh. According to the weight ratio of part of the dissolving agent to the crushed chitin, the weight ratio is 100 to 10, and the total weight is 12 kg. Adjust the pH value of the neutralizing solution to 5.0, add it according to the ratio of chitin and acylation agent 100:0.05, carry out the acylation reaction under stirring at 85°C for 3 hours, and then add it according to the ratio of chitin and crosslinking agent 100:0.5 Glutaraldehyde was stirred at 30°C for 3 hours for cross-linking reaction, and the reaction was completed. After drying, it was crushed to 80 me...

Embodiment 3

[0029] This embodiment relates to the production of soil heavy metal solidification antidotes in a 50-liter reactor. The raw materials are pulverized to 100 mesh with a ball mill. The weight ratio of part of the dissolving agent to the pulverized chitin is 100 to 15, and the total weight is 23 kilograms. Add 50 liters of reaction In the kettle, dissolve at 75°C for 1 hour, adjust the pH value to 5.0 with a neutralizing solution, add chitin to the acylation agent at a ratio of 100:0.03, carry out the acylation reaction at 60°C for 3 hours under stirring conditions, and then press the chitin Glutaraldehyde was added to the ratio of 100:0.4 of the element and the cross-linking agent, and the cross-linking reaction was carried out at 45 ° C for 2 hours, and the reaction was completed. After drying, it was crushed to 120 mesh and packaged.

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Abstract

The invention discloses a preparation method of a soil heavy metal curing detoxicant. The preparation method comprises the following steps: crushing chitin to 50-200 meshes, adding an acidic dissolution agent for dissolution, and then adding a neutralization solution to regulate the pH value to 4.0-6.5; adding an acylating agent to perform acylating reaction for 3-6 hours at 30-85 DEG C under the stirring condition; adding a cross-linking agent to perform crosslinking reaction for 1-3 hours at the temperature 30-50 DEG C under the stirring condition; and after the reaction is ended, drying and crushing to obtain the soil heavy metal curing detoxicant. The soil heavy metal curing detoxicant prepared by the preparation method disclosed by the invention can be used for reducing contents of heavy metals of chromium, lead, arsenic and the like in the soil, reducing the damage of the heavy metals on plants, and reducing the absorption of a plant system in heavy metals.

Description

technical field [0001] The invention relates to the technical field of environment and resources, in particular to a preparation method of a soil heavy metal solidification antidote. Background technique [0002] Due to the rapid development of industrialization in my country, the air and water sources have been polluted by heavy metals including cadmium, lead, arsenic and mercury to varying degrees, which in turn causes soil pollution to varying degrees, and the soil pollution in some areas is more serious. The absorption and spread of plant cultivation has caused food safety problems and seriously threatened human health. Therefore, it is very urgent to find ways and means to effectively control heavy metal pollution in soil. [0003] Chitin is the only amino-containing polysaccharide in nature. It has a strong complexing and stabilizing function for metals. Its soluble chitin as a fertilizer and oligosaccharides as a biological source pesticide have already had a broad ap...

Claims

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Application Information

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IPC IPC(8): C09K17/32
CPCC09K17/32C09K2101/00
Inventor 王士奎朱祥民梁亮姜业昊胡雪芳张志民
Owner SHANGHAI GUANFA MARINE BIOTECH CO LTD
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