인산화한 견운모 비드를 이용한 Pb(II) 흡착

• 영문명: Adsorption of Pb(II) using phosphorylated sericite bead from aqueous solution
• 발행기관: 유기성자원학회
• 저자명: 최석순 최희정
• 간행물 정보: 『유기성자원학회 학술발표대회논문집』2022년도 춘계학술대회 발표집, 114~114쪽, 전체 1쪽
• 주제분류: 공학 > 환경공학
• 파일형태: PDF
• 발행일자: 2022.05.27

영문 초록

In recent years, biomass or clay minerals, which boast abundant materials readily available everywhere, have attracted more and more attention due to their low cost, eco-friendliness and reusability. However, most natural adsorbents have low adsorption efficiency, in some cases, low adsorbent strength and low selectivity for heavy metals to be adsorbed in the aqueous solution. In order to overcome these shortcomings, the researchers reported that the adsorbent was chemically modified through various techniques, thereby obtaining an adsorbent with improved adsorption efficiency and adsorption strength. Sericite, which is abundant in nature and inexpensive, is a very attractive heavy metal adsorbent. The main components of sericite are SiO2 (45.2%), Al2O3 (38.5%), K2O (11.8%) and H2O (4.5%), and it is composed of a tetrahedral structure of silicate. The presence of hydroxyl groups on the surface of natural sericite can easily remove various contaminants in wastewater such as dyes and heavy metal ions. However, sericite does not swell in water and has low cation exchange capacity compared to other clays such as montmorillonite and bentonite due to potassium ions strongly bound to the interlayer surface. Therefore, in order to convert natural sericite into a more valuable adsorbent by improving its surface area, porosity and sorption capacity, it needs to undergo an activation process. Therefore, this study attempted to increase the adsorption capacity of cations by attaching anions to this weak structure using phosphoric acid.

키워드

Adsorption Kinetic Lead removal Phosphorylation Sericite bead