Adsorbent for heavy metal wastewater treatment and preparation method thereof

Abstract

The invention discloses an adsorbent for heavy metal wastewater treatment and a preparation method thereof. The adsorbent comprises 100-200 parts of modified zeolite powder, 50-100 parts of modified attapulgite, 25-75 parts of a hydrophilic modifier, 5-30 parts of sodium bicarbonate, 75-150 parts of aluminosilicate powder and 300-600 parts of water. The preparation method comprises the steps: step1, preparing the modified zeolite powder; step 2, preparation of the modified attapulgite; step 3, carrying out hydrophilic modification on the modified zeolite powder and the modified attapulgite; step 4, preparing an adsorbent core; and step 5, wrapping an adsorbent shell. The adsorbent has the advantages of good hydrophilicity, strong adsorption capacity, low price and easiness in separation from wastewater, and the preparation process and required production equipment are simple and are easy for industrial production.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to an adsorbent for heavy metal wastewater treatment and a preparation method. Background technique [0002] The rapid development of modern industry produces a large amount of heavy metal wastewater, which poses a great threat to the environment and human life because it is non-degradable and easy to accumulate in organisms through the food chain. Therefore, how to manage heavy metal wastewater is a prominent problem facing environmental protection today. [0003] At present, the methods for treating heavy metal wastewater mainly include precipitation method, ion resin exchange method, electrolysis method, adsorption method, reverse osmosis method, electrodialysis method, etc. These methods have achieved good results to some extent, but they are also common There are problems of secondary pollution, high cost, and unsatisfactory treatment effect. [0004] Adsorption is an...

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Problems solved by technology

[0003] At present, the methods for treating heavy metal wastewater mainly include precipitation method, ion resin exchange method, electrolysis method, adsorption method, reverse osmosis method, electrodialysis method, etc. These methods have achieved good results to some extent, but they are also common There are problems of secondary pollution, high cost, and unsatisfactory treatment effect

[0004] Adsorption is an important physical and chemical method in the treatment of heavy metal ion wastewater, especially for low concentration wastewater. The traditional adsorbent activated carbon is a porous carbon material with a large pore structure and surface area, so its advantage is the adsorption capacity. Strong and high removal efficiency, but the high price limits its application to a certain extent, so seeking the adsorbent materials with wide sources, low price and high adsorption efficiency becomes the key to the treatment of heavy metal wastewater