A leaching material capable of adsorbing and degrading organic chlorine pollutants and its preparation method

Abstract

The invention provides an elution material with an organochlorine pollutant adsorbing and degrading function and a preparation method, and belongs to the technical field of organochlorine pollutant degradation. The elution material is a multifunctional elution material which is composed of zero-valent iron and esterified and etherified humic acid and has the organochlorine pollutant adsorbing and degrading function. Humic acid, glycerinum and organic acid generate humic acid ester under the action of an acid catalyst; and glycidyl ether and carboxyl, hydroxide, amidogen and the like in the e sterified humic acid are utilized for a cross-linking reaction and etherification modification, and therefore hydrophobic ether groups and hydrophobic chains are introduced. Then iron ions and hydroxide and carboxyl in humic acid ester are subjected to coordination complexation or micro and mesoporous loading, finally the iron ions are reduced into zero-valent iron, and the elution material with the adsorption and hydrophobicity of etherified humic acid ester and the Fenton oxidizing property of zero-valent iron is prepared. Adsorption, degradation, efficient separation of chlorobenzenes POPs and soil and recycling of an elution medium can be achieved at the same time.

Description

technical field [0001] The invention belongs to the technical field of rinsing materials, in particular to a rinsing material capable of absorbing and degrading organic chlorine pollutants and a preparation method thereof. Background technique [0002] Chlorine-containing organic pollutants are widely used in pesticides, manufacturing, cleaning, chemical production and other industries, and are a class of long-term residual, bioaccumulative, semi-volatile and highly toxic, and can pass through a variety of environmental media Artificially synthesized persistent organic pollutants that pose serious hazards to human health and the ecological environment. The remediation of chlorobenzene pesticide-contaminated sites is aimed at decontamination, quality restoration, reuse, and health protection. Among the many remediation technologies for chlorobenzene POPs highly polluted soil, the use of ex-situ deep washing can break the shackles of soil medium such as large heterogeneity, p...

AI Technical Summary

Problems solved by technology

However, for highly polluted soils, the soil residues are still relatively large, and the oxidized materials cannot be recycled, which may easily cause secondary pollution of the soil.

In short, the single function of the leaching material (only elution) is limited. Even after multiple washings, it is still difficult to achieve the removal of highly polluted soil POPs up to the standard, and it produces dozens or even hundreds of times of the soil eluate, because of its amount It is large and complex in composition, which makes subsequent "eluate purification treatment" and "POPs safe treatment" very difficult

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