文献类型：期刊文献

中文题名：-Cr(VI)

英文题名：Adsorption of Cr(VI) from Aqueous Solution by Biochar-clay Derived from Clay and Peanut Shell

作者：Wang Hai[1];Yang Ningcan[1];Qiu Muqing[1]

机构：[1]Shaoxing Univ, Sch Life Sci, Shaoxing 312000, Peoples R China

年份：2020

卷号：35

期号：3

起止页码：301

外文期刊名：JOURNAL OF INORGANIC MATERIALS

收录：SCI-EXPANDED(收录号：WOS:000540998700007)、、EI(收录号：20201608479443)、WOS

基金：National Natural Science Foundation of China (21876115); Public Welfare Program of Zhejiang Natural Science (LGF19C030001)

语种：英文

外文关键词：adsorption; peanut shell; clay-biochar; Cr(VI)

外文摘要：Heavy metal chromium pollution seriously threatens the environmental safety of soil and water body. The Cr(VI) compound has strong migration ability, enrichment and strong oxidizing ability. These properties make Cr(VI) ions more dangerous and difficult to handle. Adsorption technology is a simple and effective method for treatment of heavy metal pollution. The two clay-biochars are made by mixing biochar derived from peanut shell and two kinds of clays (Kaolin and bentonite) under magnetic stirring conditions. A variety of characterizations suggest that clays uniformly deposit on the surface of biochar. Adsorption experiments indicate that the sorption of Cr(VI) ions from wastewater on Kaolin-biochar is significantly higher than that of bentonite-biochar. Adsorption kinetic of Cr (VI) on two clay-biochars follows satisfactorily the pseudo-second order model due to high correlation coefficient (R-2 >0.999). Adsorption isotherms of Cr(VI) on Biochar@Bentonite are fitted by Langmuir model, whereas the Freundlich model fits better the Cr(VI) sorption on Biochar@Kaolin. These findings are crucial for the potential application of clay-biochar composites for the treatment of the immobilization of heavy metals in environmental remediation.