A kind of preparation method of modified montmorillonite adsorbent for treating zinc-containing wastewater

Abstract

A preparation method of a modified montmorillonite adsorbent for treating zinc-bearing wastewater includes the steps of (1), preparing montmorillonite turbid liquid, namely purifying montmorillonite into a fine powder material through pretreatment measurements and preparing the montmorillonite turbid liquid from the fine powder material and distilled water; (2), preparing an FN intercalator; (3), subjecting the FN intercalator to inorganic modification; (4), purifying FN intercalated montmorillonite; (5), preparing an SDS intercalator; (6), subjecting the SDS intercalator to organic modification; (7) preparing a PAM flocculant; (8), purifying SDS intercalated montmorillonite, dropwise adding the PAM flocculant into secondarily-modified montmorillonite turbid liquid obtained in the step (6), stirring evenly rapidly prior to high-speed centrifugation and filtration, washing filter residues with deionized water to be neutral, and drying at a low temperature so as to obtain purified SDS intercalated montmorillonite powder; (9), subjecting the SDS intercalated montmorillonite powder obtained in the step (8) to high-temperature roasting so as to obtain the modified montmorillonite adsorbent.

Description

technical field [0001] The invention relates to the field of industrial sewage treatment, in particular to the preparation technology of a modified montmorillonite adsorbent for treating zinc-containing wastewater. Background technique [0002] In recent years, with the development of the industrial field, people's demand for water resources has gradually increased, and at the same time, the global water pollution problem has become more prominent. Human industrial activities have caused a large amount of sewage discharge, resulting in a gradual increase in the concentration of heavy metal pollutants in the water on the earth's surface, which seriously threatens the survival and living environment of human beings. In particular, the treatment of some highly active heavy metal ion wastewater, such as zinc-containing wastewater, has attracted great attention from the public and many experts due to its difficulty in treatment, poor effect, and high cost, and has become a must i...

AI Technical Summary

Problems solved by technology

The zinc ion adsorption performance of montmorillonite itself is not high, but after specific modification, its zinc ion adsorption performance can be greatly increased

At present, the research on the inorganic and organic modification of montmorillonite to increase its adsorption performance for specific pollutants has been very extensive, but there is not much research on the improvement of its treatment capacity for zinc-containing wastewater through modification. Therefore, applying montmorillonite to the treatment of zinc-containing wastewater often fails to achieve good treatment results.