Method for preparing magnetic powder heavy metal ion blotting chitosan compound adsorbing agent

Abstract

The present invention provides a preparation of a chitosan compound adsorbent for absorbing magnetic powder heavy metal ion imprint. The chitosan is employed as a imprinting matrix material, the nanometer magnetic powder Fe3O4 is employed as a magnetic component, the epichlorohydrin is employed as a crosslinking agent, the sodium tripolyphosphate is employed as a curing agent, after steps of ion imprinting, magnetic powder embedding and curing and template ion eliminating, the magnetic metal ion imprinting chitosan compound adsorbent is obtained. The compound absorbent prepared by the presentinvention can be separated from the solution after absorption efficiently and rapidly under the external magnetic field to realize the rapid efficient reclaim of the adsorbent. The compound absorbenthas high mechanical strength and selective absorbability of imprint Cr(VI) or Zn (II), avoids the swelling loss of the chitosan in acidity solution and improves the absorption capacity of Cr(VI) or Zn (II). The preparation of the present invention has simple reaction conditions and has no rigorous limit of the experiment conditions. The preparation of the present invention can be used to process the heavy metal waste water containing Cr(VI) or Zn (II), also reclaim Cr(VI) or Zn (II).

Description

Preparation method of magnetic powder heavy metal ion imprinted chitosan composite adsorbent (1) Technical field The invention relates to a method for preparing a heavy metal adsorbent, in particular to a method for synthesizing an adsorbent which is magnetic and has high selective adsorption performance for imprinted metal ions. (2) Background technology Heavy metals are one of the main pollutants in the water environment, mainly from electroplating, mining, metallurgy, chemical industry and other industries. Accumulate in organisms, destroy the normal physiological and metabolic activities of organisms, and endanger human health. In addition, with the development of industry, heavy metals are used more and more widely, resulting in a relative shortage of heavy metal resources. Therefore, how to treat heavy metal wastewater and effectively recycle heavy metals is a prominent problem in the field of environmental protection today. It has environmental and economic benefits...

AI Technical Summary

Problems solved by technology

The purpose of the present invention is to provide a kind of mechanical strength and the selective adsorption ability that can improve chitosan adsorbent in waste water treatment application, solve its difficult problem of solid-liquid separation from waste water, preparation has magnetic simultaneously to imprinted metal ion Preparation method of magnetic powder heavy metal ion imprinted chitosan composite adsorbent with high selective adsorption performance, which can realize the removal and separation of Cr(VI) or Zn(II) in wastewater