Issue 40, 2018

Arsenic removal from water/wastewater using layered double hydroxide derived adsorbents, a critical review

Abstract

Arsenic pollution has become a worldwide environmental concern. Dangerous arsenic concentrations in natural waters threaten the health of millions of people, and this has received significant attention. Among the various technologies that have been developed for arsenic removal from water, the use of adsorption technology is considered to be a prevailing method, because the adsorption approach usually has high removal efficiency and the advantage of convenience of handling. In recent years, layered double hydroxides (LDHs) have become prime candidates for arsenic removal, due to their hydrophilic nature and cationic layered structures. Research on arsenic removal using LDHs is mainly focused on (1) the influence of the synthesis method and composition of the LDH, (2) the influence of the particle size of the LDH, (3) the influence of the Mg/Al ratio in LDHs, (4) LDH-based hybrids and (5) the competition with other anions. This paper provides a review of the currently available literature focusing on arsenic removal using LDHs for the five parts mentioned above. In addition, based on this overview, a closing section will suggest research efforts for future work. It is expected that this review will provide a summary of the main research in this area, and will also shed light on the direction of future development.

Graphical abstract: Arsenic removal from water/wastewater using layered double hydroxide derived adsorbents, a critical review

Article information

Article type
Review Article
Submitted
27 apr 2018
Accepted
02 jun 2018
First published
20 jun 2018
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2018,8, 22694-22709

Arsenic removal from water/wastewater using layered double hydroxide derived adsorbents, a critical review

J. Wang, T. Zhang, M. Li, Y. Yang, P. Lu, P. Ning and Q. Wang, RSC Adv., 2018, 8, 22694 DOI: 10.1039/C8RA03647K

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