文献类型：期刊文献

英文题名：Rapid removal of thallium from water by a new magnetic nano-composite using graphene oxide for efficient separation

作者：Li, Liangzhong[1,2];Liu, Chang[2];Ma, Ruixue[2];Yu, Yunjiang[2];Chang, Zhaofeng[2];Zhang, Xiaohui[2];Yang, Chengyu[2];Chen, Da[3];Yu, Yang[3];Li, Wei[1];Liu, Yongdi[1]

机构：[1]East China Univ Sci & Technol, Sch Resources & Environm Engn, State Environm Protect Key Lab Environm Risk Asse, Shanghai 200237, Peoples R China;[2]Minist Ecol & Environm, South China Inst Environm Sci, Ctr Environm Hlth Res, State Environm Protect Key Lab Environm Pollut Hl, Guangzhou 510655, Peoples R China;[3]Jinan Univ, Sch Environm, Guangdong Key Lab Environm Pollut & Hlth, Guangzhou 511443, Peoples R China

年份：2021

卷号：161

外文期刊名：INTERNATIONAL BIODETERIORATION & BIODEGRADATION

收录：;EI(收录号：20212110401507);WOS:【SCI-EXPANDED(收录号:WOS:000656677300007)】；

基金：This work was supported by the National Natural Science Foundation of China (42007390, 22006102, 41931298). We also would like to thank the anonymous referees for their helpful comments on this paper.

语种：英文

外文关键词：Thallium; Reduced graphene oxide; Rapid adsorption; Magnetically responsive adsorbent; Titanium oxide

摘要：Thallium contamination has raised global concern due to its high toxicity and treatment difficulties. In this study, the magnetic adsorbent rGO-Fe3O4@TiO2 was synthesized for the effective removal of thallium(I) from water. The stable magnetism of the adsorbent before and after the adsorption ensured the facile magnetic separation from treated streams. The abundant hydroxyl groups on the surface of nano-sized TiO2 particles served as adsorptive sites for the Tl(I) ions. The adsorbent performed a fast adsorption rate of Tl(I), achieving approximately 50% of ultimate adsorbed amount within the initial 10 min at near neutral condition (pH 7.0). Tl(I) removal was significantly enhanced by increasing solution pH value due to the electrostatic attraction between Tl (I) ions and the adsorbent surface. Isotherm study showed that the adsorption process was favorable, with the maximum adsorption capacity of 141.8 mg g-1. The presence of co-existing cations might interfere and compete with the adsorption sites of Tl(I) ions. The prepared magnetically responsive adsorbent with good regeneration ability could be used as a competitive alternative to address the sudden thallium pollution incidents considering its rapid rate and high efficiency for Tl(I) adsorption and removal from aqueous systems.