Abstract
In persulfate-based advanced oxidation process(PS-AOPs),fixing nanosized metal oxide on processable substrates is highly desirable to avoid the aggregation and loss of nanocatalysts during the practical ap-plication.However,it is still challenging to develop a versatile strategy for the deposition of metal oxide nanocatalysts on various substrates with different physicochemical properties.Herein,polyphenols are utilized as a"molecular glue"and reductant to mediate the interfacial deposition of MnO2 nanocatalysts on different substrates.MnO2 nanocatalysts were in-situ grown on macroscope mineral substrates(e.g.,airstone)via an interfacial redox strategy between tannic acid(TA)and oxidized KMnO4,and then em-ployed as a fixed catalyst of peroxymonosulfate(PMS)activation for treating pharmaceutical and personal care products(PPCPs)in water.The fixed MnO2 exhibited superior catalytic performance toward differ-ent PPCPS via a singlet oxygen(1O2)-dominated nonradical oxidation pathway.PPCPs in the secondary effluent of wastewater treatment plants could be effectively removed by a fixed-bed column of the fixed MnO2 with long term stability.Redox cycle of Mn4+/Mn3+and surface hydroxyl group of the fixed MnO2 was proved to be responsible for the activation of PMS.This work provides a new avenue for developing fixed metal oxides for sustainable water treatment.
基金项目
国家重点研发计划(2022YFE0100400)
国家自然科学基金(21701130)
Key Basic Research Program of Science and Technology Commission of Shanghai Municipality(20JC1415300)
State Key Laboratory of Transducer Technology of China(SKT2207)
陕西省重点研发计划(2021GY-225)
维普
万方数据