文献类型：期刊文献

英文题名：Enhanced methyl orange degradation by natural manganese sand-catalyzed in-situ electro-generated active chlorine

作者：Khan, Asim[1];Zhang, Xinwan[1];Wang, Kun[1,2];Ahmed, Waqas[3];Ullah, Sajid[1];Mushtaq, Muhammad Umair[1];Hu, Huawei[1];Lu, Zhihao[1,2];Jia, Daqing[1,2];Zhang, Lehua[1,2,4]

机构：[1]East China Univ Sci & Technol, Natl Engn Lab Ind Wastewater Treatment, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Resources & Environm Engn, State Environm Protect Key Lab Environm Risk Asses, Shanghai 200237, Peoples R China;[3]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[4]Shihezi Univ, Sch Chem & Chem Engn, Shihezi 832003, Xinjiang, Peoples R China

年份：2025

卷号：984

外文期刊名：JOURNAL OF ELECTROANALYTICAL CHEMISTRY

收录：;EI(收录号：20251018010685);WOS:【SCI-EXPANDED(收录号:WOS:001442893600001)】；

基金：This work was supported by the project of 2023 Jixi Graphite Industry Technology Research and Development (JKJB2023H03) and the Xinjiang " Tianchi Talents " program. The authors also thank Qian Huang for her contribution to this work.

语种：英文

外文关键词：Electro-oxidation; Active chlorine; Organic dye; Natural manganese sand; Nonradicals mechanism

摘要：The application of electro-oxidation (EO) technology in organic dyes is restricted by the drawbacks, such as the expensive electrode materials, high energy consumption, and narrow pH applied range. Herein, a natural manganese sand (NMS)-catalyzed in situ electro-generated active chlorine (e.g., HClO) system was proposed to remove methyl orange (MO). The results show that MO can be efficiently removed by the NMS/EO system over a wide pH range (pH 3-12). Radicals (e.g., HO center dot, Cl center dot) and non-radical active species (e.g., 1O2, Mn4+) are involved in the removal of MO by the NMS/EO system. The effects of important parameters, including the initial solution pH, NMS dosage, current density, electrolyte type, and electrode space, on MO degradation by the NMS/EO system were investigated. The kinetic model of MO removal confirmed that the degradation rate of MO was mainly affected by the dosage of NMS compared with the NaCl concentration. Moreover, the NMS/EO system exhibited a significant reduction in energy consumption for MO removal. This work provides new insights into the degradation of organic dyes by NMS-catalyzed in situ electrogenerated active chlorine.