Recovery, regeneration and sustainable management of spent adsorbents from wastewater treatment streams:A review

Baskar, Arun V and Bolan, Nanthi and Hoang, Son A and Sooriyakumar, Prasanthi and Kumar, Manish and Singh, Lal and Jasemizad, Tahereh and Padhye, Lokesh P and Singh, Gurwinder and Vinu, Ajayan and Sarkar, Binoy and Kirkham, M B and Rinklebe, Jörg and Wang, Shengsen and Wang, Hailong and Balasubramanian, Rajasekhar and Siddique, Kadambot H M (2022) Recovery, regeneration and sustainable management of spent adsorbents from wastewater treatment streams:A review. Science of the Total Environment, 822. ISSN 0048-9697

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Abstract

Adsorption is the most widely adopted, effective, and reliable treatment process for the removal of inorganic and organic contaminants from wastewater. One of the major issues with the adsorption-treatment process for the removal of contaminants from wastewater streams is the recovery and sustainable management of spent adsorbents. This review focuses on the effectiveness of emerging adsorbents and how the spent adsorbents could be recovered, regenerated, and further managed through reuse or safe disposal. The critical analysis of both conventional and emerging adsorbents on organic and inorganic contaminants in wastewater systems are evaluated. The various recovery and regeneration techniques of spent adsorbents including magnetic separation, filtration, thermal desorption and decomposition, chemical desorption, supercritical fluid desorption, advanced oxidation process and microbial assisted adsorbent regeneration are discussed in detail. The current challenges for the recovery and regeneration of adsorbents and the methodologies used for solving those problems are covered. The spent adsorbents are managed through regeneration for reuse (such as soil amendment, capacitor, catalyst/catalyst support) or safe disposal involving incineration and landfilling. Sustainable management of spent adsorbents, including processes involved in the recovery and regeneration of adsorbents for reuse, is examined in the context of resource recovery and circular economy. Finally, the review ends with the current drawbacks in the recovery and management of the spent adsorbents and the future directions for the economic and environmental feasibility of the system for industrial-scale application.

Item Type:
Journal Article
Journal or Publication Title:
Science of the Total Environment
Additional Information:
This is the author’s version of a work that was accepted for publication in Science of the Total Environment. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Science of the Total Environment, ?, ?, 2022 DOI: 10.1016/j.scitotenv.2022.153555
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/2300/2311
Subjects:
ID Code:
166548
Deposited By:
Deposited On:
23 Feb 2022 11:50
Refereed?:
Yes
Published?:
Published
Last Modified:
20 May 2022 03:00