Opportunities for in situ electro-regeneration of organic contaminant-laden carbonaceous adsorbents.

Water Res

School of Sustainable Engineering and the Built Environment, Arizona State University, Tempe, AZ 85287-5306, United States. Electronic address:

Published: April 2023

AI Article Synopsis

  • Adsorptive separation technologies are effective for removing organic contaminants from water, but the regeneration of spent adsorbents is crucial due to inevitable breakthrough of contaminants.
  • Electrochemical regeneration is highlighted as a promising method that allows for in situ regeneration, eliminating the need for hazardous chemicals and the transportation of spent adsorbents.
  • The review assesses the fundamental principles of electro-regeneration, discusses its application to emerging contaminants like PFAS, and identifies future research areas to improve these methods.

Article Abstract

Adsorptive separation technologies have proven to be effective on organic contaminant removal in aqueous water. However, the breakthrough of contaminants is inevitable and can be at relatively low bed volumes, which makes the regeneration of spent adsorbents an urgent need. Electrochemically induced regeneration processes are given special attention and may provide ease of operation through in situ regeneration avoiding (i) removal and transport adsorbents, and (ii) avoiding use of hazardous chemicals (i.e., organic solvents, acids, or bases). Therefore, this review article critically evaluates the fundamental aspects of in situ electro-regeneration for spent carbons, and later discusses specific examples related to the treatment of emerging contaminants (such as per- and polyfluoroalkyl substances or PFAS). The fundamental concepts of electrochemically driven processes are comprehensively defined and addressed in terms of (i) adsorbent characteristics, (ii) contaminant properties, (iii) adsorption/regeneration driving operational parameters and conditions, and (iv) the competitive effects of water matrices. Additionally, future research needs and challenges to enhance understanding of in situ electro-regeneration applications for organic contaminants (specifically PFAS)-laden adsorbents are identified and outlined as a future key perspective.

Download full-text PDF

Source
http://dx.doi.org/10.1016/j.watres.2023.119718DOI Listing

Publication Analysis

Top Keywords

situ electro-regeneration
12
opportunities situ
4
organic
4
electro-regeneration organic
4
organic contaminant-laden
4
contaminant-laden carbonaceous
4
adsorbents
4
carbonaceous adsorbents
4
adsorbents adsorptive
4
adsorptive separation
4

Similar Publications

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!