文献类型：期刊文献

英文题名：Preparation and evaluation of celite decorated iron nanoparticles for the sequestration performance of hexavalent chromium from aqueous solution

作者：Cheng, Xiankui[1];Chen, Junjie[1];Li, Hui[2];Sheng, Guodong[1]

机构：[1]Shaoxing Univ, Zhejiang Engn Res Ctr Fat Soluble Vitamin, Sch Chem & Chem Engn, Shaoxing 312000, Zhejiang, Peoples R China;[2]Shaoxing Univ, Sch Med, Shaoxing 312000, Zhejiang, Peoples R China

年份：2023

卷号：30

期号：23

起止页码：63535

外文期刊名：ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH

收录：SCI-EXPANDED(收录号：WOS:000970917900011)、、EI(收录号：20242616349119)、Scopus(收录号：2-s2.0-85152681075)、WOS

基金：We sincerely thank the young and middle-aged academic cadres from Shaoxing University. This work was also supported by the Opening Project of Zhejiang Engineering Research Center of Fat-soluble Vitamin.

语种：英文

外文关键词：Cr(VI); Iron nanoparticles; Celite; Sequestration

外文摘要：The increasing usage of an important heavy metal chromium for industrial purposes, such as metallurgy, electroplating, leather tanning, and other fields, has contributed to an augmented level of hexavalent chromium (Cr(VI)) in watercourses negatively impacting the ecosystems and significantly making Cr(VI) pollution a serious environmental issue. In this regard, iron nanoparticles exhibited great reactivity in remediation of Cr(VI)-polluted waters and soils, but, the persistence and dispersion of the raw iron should be improved. Herein, this article utilized an environment-friendly celite as a modifying reagent and described the preparation of a novel composites namaly celite decorated iron nanoparticles (C-Fe-0) and evaluation of C-Fe-0 for the sequestration performance of Cr(VI) from aqueous solution. The results indicated that initial Cr(VI) concentration, adsorbent dosage, and especially solution pH are all critical factors to control C-Fe-0 performance in Cr(VI) sequestration. We demonstrated that C-Fe-0 could achieve a high Cr(VI) sequestration efficiency with an optimized adsorbent dosage. Fitness of the pseudo-second-order kinetics model with data indicated that adsorption was the rate-controlling step and chemical interaction controlled Cr(VI) sequestration on C-Fe-0. The adsorption isotherm of Cr(VI) could be the best depicted by Langmuir model with a monolayer adsorption. The underlying sequestration path of Cr(VI) by C-Fe-0 was then put forward, and the combined effect of adsorption and reduction implied the potentials of C-Fe-0 in Cr(VI) removal.