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Review | Open Access

Hydrogel-based superadsorbents for efficient removal of heavy metals in industrial wastewater treatment and environmental conservation

Md. Samrat Hossaina, Md. Manik Hossaina, Most. Kulsum Khatuna, Khan Rajib Hossainb( )
Department of Applied Chemistry and Chemical Engineering, University of Rajshahi, Rajshahi 6205, Bangladesh
State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China
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HIGHLIGHTS

● Heavy metal adsorption from industrial wastewater using superadsorbent hydrogels (SAH).

● SAHs with good thermal and mechanical capabilities for heavy metal ion removal.

● In water, hydrogels have an excellent swelling ratio and slow-release characteristics.

● A versatile SAH with broad applications, contributing to eco-friendly practices and environmental conservation.

● SAHs are a promising new material for a wide range of applications, including water purification, drug delivery, and tissue engineering.

Graphical Abstract

Abstract

Superadsorbent hydrogels have become a viable solution to the urgent problem of industrial wastewater contamination. This paper offers a thorough analysis of the most recent advancements in superadsorbent hydrogels, highlighting their potential to reduce pollution from industrial waste and support environmental preservation. The review begins with an explanation of the basic properties and principles of superadsorbent hydrogels, with a focus on their exceptional ability to swell with water. The story then flows into a thorough analysis of wastewater treatment, explaining how superadsorbent hydrogels interact with pollutants. Synthesis processes using natural, synthetic, and hybrid materials are examined to reveal the many strategies used to produce these hydrogels. In addition, the study explores the environmental effects of using superadsorbent hydrogels in wastewater treatment, assessing possible effects on soil and aquatic environments. This research highlights the revolutionary potential of superadsorbent hydrogels in improving industrial wastewater treatment methods while also protecting the environment.

Keywords

HydrogelsWastewater treatmentSuperadsorbentEnvironment protection

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Environmental Functional Materials
Volume 2 Issue 2,
August 2023
Pages 142-158
DOI: 10.1016/j.efmat.2024.01.001
Cite this article:
Hossain MS, Hossain MM, Khatun MK, et al. Hydrogel-based superadsorbents for efficient removal of heavy metals in industrial wastewater treatment and environmental conservation. Environmental Functional Materials , 2023, 2(2): 142-158. https://doi.org/10.1016/j.efmat.2024.01.001

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Received: 25 October 2023
Revised: 22 December 2023
Accepted: 05 January 2024
Published: 11 February 2024
© 2024 The Authors.

This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
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