Zero valent iron-electro-Fenton-peroxymonosulfate (ZVI-E-Fenton-PMS) process for industrial wastewater treatment

Abstract

This article reports a novel combined advanced oxidation process (ZVI-E-Fenton-PMS) for the treatment of refractory wastewater and investigates its main oxidation mechanisms.

Novel chemically reduced cobalt-doped g-C3N4 (CoCN-x) as a highly heterogeneous catalyst for the super-degradation of organic dyes via peroxymonosulfate activation

“…79 Additionally, the higher concentration of singlet oxygen ( 1 O 2 ) could be generated due to the transformation of PMS to SO 5 2− (as represented by eqn (3) and (4)). 29 Finaly, raising the pH additionally promoted the production of hydroxyl radicals on the surface of the CoCN–NaBH 4 catalyst. OH˙ serve as active sites for electron transfer, thereby bolstering the catalyst's effectiveness.…”

“…27,28 Hence, several researchers have investigated the industrial applicability of AOPs based on PMS activation and they have delved into the theoretical and reaction mechanism aspects. 29,30 In essence, the activation process of PMS involves mixing an appropriate catalyst with peroxymonosulfate (PMS) under well-defined operating conditions (temperature, pH, time, concentration, etc. ) and leads to the generation of free radicals ( e.g.…”

Magnetic MnFe2O4/ZIF-67 nanocomposites with high activation of peroxymonosulfate for the degradation of tetracycline hydrochloride in wastewater

“…Because PMS is more easily activated than PDS, 20 and compared with ˙OH produced by H 2 O 2 , SO 4 − ˙ produced by PMS has the advantages of long life, good selectivity, and wide working pH range; 21–24 as such, the type of AOPs based on PMS activation to generate active radicals has received wide attention. 50,51 Many transition metal ions (such as Co 2+ , Fe 3+ , Cu 2+ , and Mn 2+ ) can effectively activate PMS to produce active free radicals, among which cobalt ions have been reported to have the best ability to activate PMS. 25–29 However, although the Co 2+ /PMS system can degrade organic pollutants, it has the problem that homogeneous catalysts cannot be recovered, and carcinogenic Co 2+ will have an impact on human health, 30 so it is particularly important to find cobalt-containing heterogeneous catalysts.…”