Du, Jiangkun Xiao, Guangfeng Xi, Yanxing Zhu, Xiaowei Su, Fan Kim, Sang Hoon 2024-01-19T18:03:46Z 2024-01-19T18:03:46Z 2021-09-05 2020-02-01 0043-1354 https://pubs.kist.re.kr/handle/201004/118973 This study presents a novel periodate oxidation system mediated by manganese oxides for the rapid removal of aqueous contaminants. The catalytic activation of periodate on manganese oxides was demonstrated as an efficient advanced oxidation system for degradation of sulfanilamide. The reactivity of manganese oxides with different Mn valence followed the order of MnO2>Mn3O4>Mn2O3, all of which showed extraordinary reusability during repeated activation of periodate. Sulfanilamide was rapidly degraded along with stoichiometric transformation of IO4- to IO3-, and both processes exhibited good linear correlations with the dosage of manganese oxides. While the degradation of sulfanilamide in the MnO2/IO4- system was accelerated at lower solution pH, it was only slightly affected by ionic strength, water anions and humic acid. In contrast to the homogeneous system of Mn2+/IO4-, sulfanilamide degradation was not influenced in oxic and anoxic environment. It was evidenced by quenching studies and EPR tests that both singlet oxygen (O-1(2)) and iodate radicals (IO3 center dot) were generated when the metastable Mn(IV)-O-IO3 interacted with sulfanilamide. The XPS spectra of Mn 2p and O 1s before and after reactions indicated that the catalytic activation of periodate on MnO2 was not in company with the redox cycling of Mn(IV) species. (C) 2019 Elsevier Ltd. All rights reserved. English PERGAMON-ELSEVIER SCIENCE LTD ACID ORANGE 7 AQUATIC ENVIRONMENTS BISPHENOL-A PHOTOACTIVATED PERIODATE ANTIBIOTIC-RESISTANCE ORGANIC CONTAMINANTS PHENOL DEGRADATION SINGLET OXYGEN OXIDATION WATER Periodate activation with manganese oxides for sulfanilamide degradation Article 10.1016/j.watres.2019.115278 1 WATER RESEARCH, v.169 WATER RESEARCH 169 scie scopus 000509632100068 2-s2.0-85074685038 Engineering, Environmental Environmental Sciences Water Resources Engineering Environmental Sciences & Ecology Water Resources Article ACID ORANGE 7 AQUATIC ENVIRONMENTS BISPHENOL-A PHOTOACTIVATED PERIODATE ANTIBIOTIC-RESISTANCE ORGANIC CONTAMINANTS PHENOL DEGRADATION SINGLET OXYGEN OXIDATION WATER Periodate Diverse manganese oxides MnO2 Sulfanilamide Singlet oxygen