Preparation method of plasma treatment modified Luffa Vegetable Sponge wastewater adsorbent

Abstract

The invention discloses a preparation method of a plasma treatment modified Luffa Vegetable Sponge wastewater adsorbent. The surface of Luffa Vegetable Sponge is pretreated through using a plasma treatment technology, and carboxyl groups are generated on the surface of fibers due to the surface oxidation effect, so the adsorption sites are increased; an etching effect makes the surface of Luffa Vegetable Sponge surfaces have obvious grooves, so the specific surface area is increased, and the intermolecular hydrogen bond effect is decreased, thereby the crystallization degree is decreased; and egg shell wastes are comprehensively used as a calcification liquid to chemically modify the plasma treated Luffa Vegetable Sponge, the surface of the Luffa Vegetable Sponge is loaded with calcium, and ion exchange increases the adsorption ability, so the calcium loaded Luffa Vegetable Sponge has a good adsorption effect on copper ions, and can effectively remove Cd<2+>, Pb<2+>, Hg<2+> and other heavy metal ions from wastewater. Compared with the prior art, the method has the advantages of simplicity in operation, water saving, no pollution, and meeting of the requirements of green chemistry and sustainable development.

Description

technical field [0001] The invention relates to the technical field of biosorbent preparation, in particular to a method for preparing a plasma-treated modified loofah wastewater adsorbent. Background technique [0002] Industrial wastewater and urban domestic sewage contain a large amount of heavy metal ions. These heavy metals are enriched in organisms through the food chain, posing a serious threat to human health and the ecological environment. Although the traditional chemical method has a certain removal effect, the production cost is relatively high, and most of them will cause secondary pollution to the environment. Therefore, the search for environmentally friendly adsorbents has become the focus of attention today. As a renewable, biodegradable and biocompatible adsorbent, biosorbents are widely used for the removal of heavy metal ions. [0003] Commonly used biosorbents include starch, cellulose, lignin, and chitosan. In the past, researchers used soybean hulls...

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Problems solved by technology

[0004] In this paper, the molecular structure of cellulose has indeed been changed by esterification reaction. Carboxyl groups are introduced through esterification reaction to increase the adsorption sites, and its adsorption performance is obviously improved. Alkaline pretreatment can eliminate part of the crystallinity of loofah fibers to improve esterification. reactivity, but they also pose a growing environmental problem