Preparation method of macromolecular soil remediation agent

Abstract

The invention discloses a preparation method of a macromolecular soil remediation agent. The preparation method comprises the following steps of slowly adding dropwise a sodium hydroxide solution to an acrylic acid aqueous solution until the degree of neutralization is 80%, performing cooling, adding a cross-linking agent N,N'-methylene bisacrylamide and hydroxyethyl methacrylate, and then performing uniform stirring; adding whole green bean powder to a three-neck flask, adding distilled water, performing stirring and gelatinization in a thermostatic water bath, adjusting the pH of mixed liquid with the sodium hydroxide solution, introducing nitrogen gas, adding potassium persulfate, adding prepared mixed liquid, performing stirring for thickening, pouring thickened reaction liquid to a tray, performing a reaction in thermostatic water bath, cutting obtained gel, performing vacuum drying, performing screening and performing packaging so as to obtain the macromolecular soil remediation agent. According to the macromolecular soil remediation agent prepared by the method disclosed by the invention, the agricultural green bean powder is used as the raw material, so that the macromolecular soil remediation agent has massive hydrophilic groups, can rapidly and massively absorb water, salt water and physiological liquid, is stable in molecular structure and has superhigh ion adsorption performance.

Description

technical field [0001] The invention relates to the technical field of agricultural pollution control, in particular to a preparation method of a polymer soil remediation agent. Background technique [0002] Soil is one of the four elements of the environment and plays an irreplaceable role in the natural ecosystem. The problem of soil pollution in our country is becoming more and more prominent, especially with the development of industrialization, urbanization and highly intensified agriculture, the development of dyes, chemicals and minerals. The pollution of waste gas, waste water, waste residue, agricultural chemical fertilizers and pesticides discharged by industries such as smelting and processing has become more and more serious, resulting in the decline of more and more farmland soil quality, in which the exchangeable heavy metals are directly absorbed and enriched by crops. directly threaten human health. Soil pollution not only changes the physical and chemical ...

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Problems solved by technology

The soil leaching toxicity after treatment by this method is very low, but the energy consumption is high, and secondary pollution may be generated during the treatment process

[0007] Chinese patent (application publication number CN101695711A) discloses a chemical immobilization material and application of soil arsenic. The chemical immobilization material is composed of nano-titanium dioxide, iron powder, and sawdust, and has a strong adsorption capacity for soil arsenic; however, nano-titanium dioxide is not easy Preparation, unstable properties, and high cost, so it is not easy to use on a large scale

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