期刊
SCIENCE OF THE TOTAL ENVIRONMENT
卷 801, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.scitotenv.2021.149490
关键词
Salty water; Perovskite; Co-Fe bimetal; Peroxymonosulfate; Bisphenol A
资金
- National Science and Technology Major Project for Water Pollution Control and Treatment [2018ZX07208008, 19DZ2254400]
- fundamental research expenses for the central universities
The newly synthesized LaCo0.5Fe0.5O3 microns were effective in degrading BPA, even in the presence of 50 mM Cl- in salty water. Reactive chlorine species and radicals generated by LaCo0.5Fe0.5O3 activation of PMS played a crucial role in promoting the degradation of BPA.
Although it can effectively degrade refractory organic pollutants, advanced oxidation processes (AOPs) can be seriously interfered with the co-existing substance in salinity water. Herein, three-dimensional hierarchical cobalt-doped LaFeO3 perovskites (LaCo0.5Fe0.5O3) micron spheres composed of nano-rods were hydrothermally synthesized and applied to activate peroxymonosulfate (PMS) for degrading bisphenol A (BPA). Nearly 100% BPA was removed by LaCo0.5Fe0.5O3/PMS system in presence of more than 50 mM Cl- within only 2 min compared that of 30 min without Cl-, which was attributed to reactive chlorine species (RCS) including Cl- and HOCl with higher oxidation capacity. center dot OH and SO4 center dot- produced by LaCo0.5Fe0.5O3 activating PMS played crucial roles as the source of RCS in LaCo0.5Fe0.5O3/Cl-/PMS system. The synergistic effect between ROS and RCS promoted by the enhanced oxygen vacancies and the efficient redox recycling of Fe-III/Fe-II and Co-III/Co-II. Other anions like SO42- and NO3- hardly affected the BPA degradation. BPA degradation efficiency was also improved either in a wide pH range or in the presence of natural organic matters in salty water. This work also demonstrated the potential application of Fe-Co bimetallic LaCo0.5Fe0.5O3 activating PMS system for degradation of BPA or other organic micropollutants in seawater system. (C) 2021 Published by Elsevier B.V.
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