A kind of composite material for treating heavy metal pollution in soil and preparation method thereof

A technology of composite materials and heavy metals, applied in the field of environmental pollution control, to achieve the effects of improving removal efficiency, facilitating recycling, and simple operation

Active Publication Date: 2020-04-10
FOUR FRIENDS OF CHENGDU CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the above-mentioned deficiencies in the existing soil heavy metal pollution control methods, and provide a composite material for controlling soil heavy metal pollution and its preparation method

Method used

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  • A kind of composite material for treating heavy metal pollution in soil and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A composite material for controlling soil heavy metal pollution, prepared by the following preparation method:

[0026] 1. With 8 parts by weight of lignocellulose, 20 parts of hydroxy acid, 30 parts of polyvinyl alcohol, 15 parts of amorphous olefin copolymer, 4 parts of sodium citrate and 2 parts of sodium phosphate and sodium borate The amount ratio of the substance is 1:2, and the initiator is dissolved in the solvent mixed with the ratio of glycerin and water in the amount of 1:4. After mixing evenly, it is heated to 140°C for graft polymerization. React for 30 minutes to obtain a composite polymer material;

[0027] 2. Mix the composite polymer material obtained in step 1 with 15 parts of azodicarbonamide, 15 parts of sodium carbonate, and 0.8 part of dicumyl peroxide and place it in a mold for foaming, and use mechanical force to break the closed cells. A composite material with a porous sponge structure is obtained;

[0028] The composite material for controll...

Embodiment 2

[0030] A composite material for controlling soil heavy metal pollution, prepared by the following preparation method:

[0031] 1. With 5 parts by weight of lignocellulose, 30 parts of hydroxy acid, 20 parts of polyvinyl alcohol, 25 parts of amorphous olefin copolymer, 5 parts by weight of sodium citrate and 1 part of potassium phosphate and potassium borate The initiator mixed with the ratio of the substance amount of the substance is 1:5 is dissolved in the solvent mixed with the ratio of the substance amount of glycerol and water of 1:3, and after mixing evenly, it is heated to 130°C for graft polymerization React for 20 minutes to obtain a composite polymer material;

[0032] 2. Mix the composite polymer material obtained in step 1 with 20 parts of azodicarbonamide, 10 parts of sodium carbonate, and 0.5 part of dicumyl peroxide, place it in a mold for foaming, and use mechanical force to break the closed cells. A composite material with a porous sponge structure is obtaine...

Embodiment 3

[0035] A composite material for controlling soil heavy metal pollution, prepared by the following preparation method:

[0036] 1. 10 parts by weight of lignocellulose, 10 parts of hydroxy acid, 40 parts of polyvinyl alcohol, 10 parts of amorphous olefin copolymer, 3 parts of sodium citrate and 3 parts of ammonium phosphate and sodium borate The initiator mixed with the ratio of the substance amount of the substance is 1:1 is dissolved in the solvent mixed with the ratio of the substance amount of glycerin and water of 1:5, and after mixing evenly, it is heated to 150°C for graft polymerization React for 40 minutes to obtain a composite polymer material;

[0037] 2. Mix the composite polymer material obtained in step 1 with 10 parts of azodicarbonamide, 20 parts of sodium carbonate, and 1.0 part of dicumyl peroxide, place it in a mold for foaming, and use mechanical force to break the closed cells, A composite material with a porous sponge structure is obtained;

[0038] The ...

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Abstract

The invention discloses a composite material for treating heavy metal pollution of soil. The composite material has a porous sponge structure and is prepared from the following raw materials in parts by weight: 5-10 parts of lignocellulose, 10-30 parts of hydroxy acid, 20-40 parts of polyvinyl alcohol, 10-25 parts of amorphous olefin copolymer, 10-20 parts of azodicarbonamide, 10-20 parts of sodium carbonate, 0.5-1.0 parts of dicumyl peroxide, 3-5 parts of sodium citrate, and 1-3 parts of initiator. The composite material has a good removal effect of heavy metal ions, the steps for treating heavy metal polluted soil are simple, the treatment efficiency is high, and the composite material is suitable for treating the heavy metal pollution of soil on large scale.

Description

technical field [0001] The invention relates to the field of environmental pollution control, in particular to a composite material for controlling soil heavy metal pollution and a preparation method thereof. Background technique [0002] In recent years, with the continuous advancement of industrialization and urbanization in China, the problem of soil pollution has become increasingly serious. Heavy metal pollution can not only cause changes in soil composition, structure and function, but also inhibit crop root growth and photosynthesis, resulting in crop yield reduction or even failure . Soil heavy metal pollution is a major environmental problem at home and abroad today. Among heavy metals, five heavy metal elements, mercury, cadmium, lead, arsenic, and chromium, are the most harmful to human health and are called "five poisonous elements". Heavy metals enter the soil through different channels, and after complex physical and chemical reactions, they stay in the soil i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L29/04C08L23/00C08L1/02C08K13/02C08K5/09C08K5/098C08K3/26C08K5/14C08J9/10C09K17/40
CPCC08J9/103C08J2203/04C08J2329/04C08J2423/00C08L29/04C08L2203/14C08L2205/03C09K17/40C08L23/00C08L1/02C08K13/02C08K5/09C08K5/098C08K2003/262C08K5/14
Inventor 谭仁爱
Owner FOUR FRIENDS OF CHENGDU CHEM IND
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