Issue 69, 2018

A critical review on arsenic removal from water using iron-based adsorbents

Abstract

Intensive research efforts have been pursued to remove arsenic (As) contamination from water with an intention to provide potable water to millions of people living in different countries. Recent studies have revealed that iron-based adsorbents, which are non-toxic, low cost, and easily accessible in large quantities, offer promising results for arsenic removal from water. This review is focused on the removal of arsenic from water using iron-based materials such as iron-based nanoparticles, iron-based layered double hydroxides (LDHs), zero-valent iron (ZVI), iron-doped activated carbon, iron-doped polymer/biomass materials, iron-doped inorganic minerals, and iron-containing combined metal oxides. This review also discusses readily available low-cost adsorbents such as natural cellulose materials, bio-wastes, and soils enriched with iron. Details on mathematical models dealing with adsorption, including thermodynamics, kinetics, and mass transfer process, are also discussed. For elucidating the adsorption mechanisms of specific adsorption of arsenic on the iron-based adsorbent, X-ray photoelectron spectroscopy (XPS) and X-ray absorption spectroscopy (XAS) are frequently used. Overall, iron-based adsorbents offer significant potential towards developing adsorbents for arsenic removal from water.

Graphical abstract: A critical review on arsenic removal from water using iron-based adsorbents

Article information

Article type
Review Article
Submitted
15 okt 2018
Accepted
21 noy 2018
First published
27 noy 2018
This article is Open Access
Creative Commons BY license

RSC Adv., 2018,8, 39545-39560

A critical review on arsenic removal from water using iron-based adsorbents

L. Hao, M. Liu, N. Wang and G. Li, RSC Adv., 2018, 8, 39545 DOI: 10.1039/C8RA08512A

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

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