TY - JOUR
T1 - Hydrodynamic cavitation and activated persulfate oxidation for degradation of bisphenol A
T2 - Kinetics and mechanism
AU - Choi, Jongbok
AU - Cui, Mingcan
AU - Lee, Yonghyeon
AU - Kim, Jeonggwan
AU - Son, Younggyu
AU - Khim, Jeehyeong
N1 - Funding Information:
This study was supported by the National Research Foundation (NRF-2017R1D1A1B03030079) and Korea Institute of Energy Technology Evaluation and Planning (KETEP, 20152510101820).
Funding Information:
This study was supported by the National Research Foundation ( NRF-2017R1D1A1B03030079 ) and Korea Institute of Energy Technology Evaluation and Planning ( KETEP , 20152510101820 ). Appendix A
Publisher Copyright:
© 2018 Elsevier B.V.
PY - 2018/4/15
Y1 - 2018/4/15
N2 - Bisphenol A (BPA) is an endocrine disruptor and is toxic at low concentrations. Furthermore, in order to oxidize BPA at the water treatment, an economical treatment method is required. This study was the first study to apply hydrodynamic cavitation/persulfate (HC/PS) processes to degrade BPA and investigated the effects of important operating parameters, such as HC inlet pressure, PS loading, pH, temperature and other anions. The results showed that the optimal pressure of HC was 0.5 MPa and the rate constant increased as the PS load concentration increased. The contribution of [rad]OH and SO4−[rad] to BPA oxidation using HC/PS processes was 10.3% and 89.7%, respectively. The reaction rate constant decreased with increasing pH and the reaction rate constant increased with increasing temperature. The activation energy was 69.62 kJ mol−1. The effects of other anions on BPA degradation were in the following order: Cl−> NO3−> HCO3−. Five major intermediates were formed in the HC/PS processes and they were obtained during 120 min of operation. Based on this, this study described the decomposition pathway of BPA. The kinetic study and economic evaluation of the HC/PS processes can be used as basic data for the real wastewater treatment process in the future.
AB - Bisphenol A (BPA) is an endocrine disruptor and is toxic at low concentrations. Furthermore, in order to oxidize BPA at the water treatment, an economical treatment method is required. This study was the first study to apply hydrodynamic cavitation/persulfate (HC/PS) processes to degrade BPA and investigated the effects of important operating parameters, such as HC inlet pressure, PS loading, pH, temperature and other anions. The results showed that the optimal pressure of HC was 0.5 MPa and the rate constant increased as the PS load concentration increased. The contribution of [rad]OH and SO4−[rad] to BPA oxidation using HC/PS processes was 10.3% and 89.7%, respectively. The reaction rate constant decreased with increasing pH and the reaction rate constant increased with increasing temperature. The activation energy was 69.62 kJ mol−1. The effects of other anions on BPA degradation were in the following order: Cl−> NO3−> HCO3−. Five major intermediates were formed in the HC/PS processes and they were obtained during 120 min of operation. Based on this, this study described the decomposition pathway of BPA. The kinetic study and economic evaluation of the HC/PS processes can be used as basic data for the real wastewater treatment process in the future.
KW - Activation energy
KW - Bisphenol A
KW - Hydrodynamic cavitation/persulfate process
KW - Hydroxyl radical
KW - Mechanism
KW - Sulfate radical
UR - http://www.scopus.com/inward/record.url?scp=85044780425&partnerID=8YFLogxK
U2 - 10.1016/j.cej.2018.01.018
DO - 10.1016/j.cej.2018.01.018
M3 - Article
AN - SCOPUS:85044780425
SN - 1385-8947
VL - 338
SP - 323
EP - 332
JO - Chemical Engineering Journal
JF - Chemical Engineering Journal
ER -