Development of Surrogate Parameters to Evaluate Micropollutant Abatement and N -Nitrosodimethylamine (NDMA) Formation Reduction by Permanganate Preoxidation

作者：Yang Song, Ting Chen, Sha Feng, Jianshan Peng, Kai Li, Peiyan Tan, Wen Qin · 发表于：ACS ES&T Engineering · 年份：2022 · DOI：10.1021/acsestengg.2c00108 · 被引用次数：3 · 研究领域：Water Treatment and Disinfection、Advanced oxidation water treatment、Wastewater Treatment and Nitrogen Removal

UV absorbance at 254 nm (UV 254 ) and electron-donating capacity (EDC) abatements were developed as novel surrogate parameters to evaluate the degradation of micropollutants in different water samples after direct permanganate (Mn(VII)) oxidation or Mn(VII) oxidation with filtration. UV 254 abatement was mainly attributed to the enhanced coagulation effect of manganese oxidation products. EDC was abated more efficiently than UV 254 because the reaction products of Mn(VII) oxidation by accepting electrons still absorb at 254 nm. UV 254 and EDC abatements during direct Mn(VII) oxidation were compared to those resulting from other preoxidation processes including ozonation, peroxomonosulfate (PMS) oxidation, and PMS-Fe(II) oxidation. UV 254 was significantly abated during ozonation with tert-butanol while EDC abatement was notable after direct Mn(VII) oxidation. The humic-like fluorescent value first increased slightly and decreased significantly with increasing Mn(VII) dose. The assimilable organic carbon formation increased during Mn(VII) oxidation with filtration. The relative abatement of selected micropollutants showed good one-phase correlations with UV 254 or EDC in humic acid solution and lake water and two-phase correlations in groundwater. During Mn(VII) oxidation and filtration of lake water followed by postchloramination, N -nitrosodimethylamine (NDMA) and total N -nitrosamine formation decreased with increasing specific Mn(VII) dose. NDMA formation abatement correla...