TY - JOUR
T1 - Reclamation of forward osmosis reject water containing hexavalent chromium via coupled electrochemical-physical processes
AU - Mousazadeh, Milad
AU - Naghdali, Zohreh
AU - Kabdaşlı, Işık
AU - Sandoval, Miguel A.
AU - Titchou, Fatima Ezzahra
AU - Malekdar, Farideh
AU - Nasr, Mahmoud
AU - Martínez-Huitle, Carlos A.
AU - Lichtfouse, Eric
AU - Emamjomeh, Mohammad Mahdi
N1 - Publisher Copyright:
© 2022 Informa UK Limited, trading as Taylor & Francis Group.
PY - 2024
Y1 - 2024
N2 - Forward osmosis is a water separation process that uses the natural energy of osmotic pressure to separate water from dissolved solutes through a semipermeable membrane. One of the major challenges using this process is the rejection water which contains high content of pollutants, hindering its practical application. Herein, for the first time, this work introduces a coupled electrochemical-physical process including iron-electrocoagulation/filtration/sedimentation as a cost-effective treatment to the forward osmosis reject water containing hexavalent chromium to be reclaimed. The synergistic treatment was optimized through a central composite design and response surface methodology to enhance hexavalent Cr removal and minimize operating costs, electrical energy consumption, and settled sludge volume. A 90.0% chromium removal was achieved under optimized conditions: electrolysis time of 59.7 min and current of 1.24 A (J = 6.32 mA cm−2). In addition, operating costs of 0.014 USD m−3, electrical energy consumption of 0.005 kWh m−3, and settled sludge volume of 445 mL L−1 were obtained.
AB - Forward osmosis is a water separation process that uses the natural energy of osmotic pressure to separate water from dissolved solutes through a semipermeable membrane. One of the major challenges using this process is the rejection water which contains high content of pollutants, hindering its practical application. Herein, for the first time, this work introduces a coupled electrochemical-physical process including iron-electrocoagulation/filtration/sedimentation as a cost-effective treatment to the forward osmosis reject water containing hexavalent chromium to be reclaimed. The synergistic treatment was optimized through a central composite design and response surface methodology to enhance hexavalent Cr removal and minimize operating costs, electrical energy consumption, and settled sludge volume. A 90.0% chromium removal was achieved under optimized conditions: electrolysis time of 59.7 min and current of 1.24 A (J = 6.32 mA cm−2). In addition, operating costs of 0.014 USD m−3, electrical energy consumption of 0.005 kWh m−3, and settled sludge volume of 445 mL L−1 were obtained.
KW - Electrocoagulation
KW - Forward osmosis concentrate
KW - Hexavalent chromium removal
KW - Response surface methodology
KW - Sustainable treatment
UR - http://www.scopus.com/inward/record.url?scp=85139569108&partnerID=8YFLogxK
U2 - 10.1080/09593330.2022.2130104
DO - 10.1080/09593330.2022.2130104
M3 - Article
C2 - 36174186
AN - SCOPUS:85139569108
SN - 0959-3330
VL - 45
SP - 888
EP - 901
JO - Environmental Technology (United Kingdom)
JF - Environmental Technology (United Kingdom)
IS - 5
ER -