Issue 58, 2021

Recent advances in dye and metal ion removal using efficient adsorbents and novel nano-based materials: an overview

Abstract

Excessive levels of dyes and heavy metals in water sources have long been a source of concern, posing significant environmental and public health threats. However, adsorption is a feasible technique for removing dye contaminants and heavy metals from water due to its high efficiency, cost-effectiveness, and easy operation. Numerous researchers in batch studies extensively evaluated various adsorbents such as natural materials, and agriculture-derived and industrial wastes; however, large-scale application is still missing. Nanotechnology is a novel approach that has arisen as one of the most versatile and cost-effective ways for dye and heavy metal removal. Its promotion on large-scale applications to investigate technological, fiscal, and environmental aspects for wastewater decontamination is particularly important. This review critically reviews wastewater treatment techniques, emphasizing the adsorption process and highlighting the most effective parameters: solution pH, adsorbent dosage, adsorbent particle size, initial concentration, contact time, and temperature. In addition, a comprehensive, up-to-date list of potentially effective low-cost adsorbents and nano-sorbents for the removal of dyes and heavy metals has been compiled. Finally, the challenges towards the practical application of the adsorption process based on various adsorbents have been drawn from the literature reviewed, and our suggested future perspectives are proposed.

Graphical abstract: Recent advances in dye and metal ion removal using efficient adsorbents and novel nano-based materials: an overview

Article information

Article type
Review Article
Submitted
14 9 2021
Accepted
04 11 2021
First published
11 11 2021
This article is Open Access
Creative Commons BY license

RSC Adv., 2021,11, 36528-36553

Recent advances in dye and metal ion removal using efficient adsorbents and novel nano-based materials: an overview

A. K. Badawi, M. Abd Elkodous and G. A. M. Ali, RSC Adv., 2021, 11, 36528 DOI: 10.1039/D1RA06892J

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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