Preparation method of corn straw charcoal-based composite adsorbent

Abstract

The invention discloses a preparation method of a corn straw charcoal-based composite adsorbent, and belongs to the technical field of water treatment. The preparation method comprises the following steps of drying the corn straw, crushing, and screening, so as to obtain corn straw powder; mixing the corn straw powder, distillers' grain, bacterial residue, cow excrement and deionized water, fermenting, filtering, drying, treating in a ball grinding way, screening, gradually heating and carbonizing, so as to obtain a carbonized material; mixing a modified polyvinyl alcohol solution and a peachgum solution, sequentially adding hydrochloric acid, a glutaraldehyde solution and the carbonized material, stirring and mixing, filtering, washing, and drying under the vacuum condition, so as to obtain pretreated charcoal; mixing modified montmorillonite and an organic solvent, treating by ultrasonic waves, adding the deionized water, pretreating charcoal and phospholipids, stirring and mixing,dripping ethyl orthosilicate, and continuing to stir, so as to obtain the corn straw charcoal-based composite adsorbent. The prepared corn straw charcoal-based composite adsorbent has excellent adsorption effect on ammonia-nitrogen in acid wastewater.

Description

technical field [0001] The invention discloses a preparation method of a corn stalk biochar-based composite adsorbent, which belongs to the technical field of water treatment. Background technique [0002] Industrial wastewater and urban domestic sewage contain a large amount of ammonia nitrogen. Excessive discharge of ammonia nitrogen into natural water bodies can cause eutrophication of water bodies and lead to mass death of fish and other organisms. Facing the deteriorating environment, it is extremely important to develop methods that can efficiently remove copper and ammonia nitrogen in sewage. The adsorption method is simple in process and low in cost, and has been widely used in sewage treatment. In recent years, researchers have paid more and more attention to the use of agricultural by-products as biosorbents to adsorb pollutants in water bodies. Common agricultural by-products that can be used as biosorbents include corncobs and rice husks. [0003] Ammonia nitro...

AI Technical Summary

Problems solved by technology

[0006] The technical problem mainly solved by the present invention is: Aiming at the problem that traditional biochar adsorbents have poor