TY - JOUR
T1 - Opportunities for in situ electro-regeneration of organic contaminant-laden carbonaceous adsorbents
AU - Ersan, Gamze
AU - Cerrón-Calle, Gabriel Antonio
AU - Ersan, Mahmut S.
AU - Garcia-Segura, Sergi
N1 - Funding Information:
This work was supported by research grants from the Phoenix/Scottsdale Groundwater Contamination Endowment seed fund and eFellows program, which is administered by the American Society for Engineering Education (ASEE) with funding provided by the National Science Foundation (NSF).
Publisher Copyright:
© 2023 Elsevier Ltd
PY - 2023/4/1
Y1 - 2023/4/1
N2 - 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.
AB - 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.
KW - Electrochemical water treatment
KW - Granular activated carbon (GAC)
KW - Per- and polyfluoroalkyl substances (PFAS)
KW - Spent carbon
KW - Water treatment process intensification
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U2 - 10.1016/j.watres.2023.119718
DO - 10.1016/j.watres.2023.119718
M3 - Review article
C2 - 36774755
AN - SCOPUS:85147872585
SN - 0043-1354
VL - 232
JO - Water Research
JF - Water Research
M1 - 119718
ER -