TY - JOUR T1 - A comparison of iodinated trihalomethane formation from chlorine, chlorine dioxide and potassium permanganate oxidation processes. AU - Zhang,Tian-Yang, AU - Xu,Bin, AU - Hu,Chen-Yan, AU - Lin,Yi-Li, AU - Lin,Lin, AU - Ye,Tao, AU - Tian,Fu-Xiang, PY - 2014/04/11/received PY - 2014/09/23/revised PY - 2014/09/26/accepted PY - 2014/12/3/entrez PY - 2014/12/3/pubmed PY - 2016/1/28/medline SP - 394 EP - 403 JF - Water research JO - Water Res VL - 68 N2 - This study compared the formation of iodinated trihalomethanes (I-THMs) from iodide-containing raw waters oxidized by chlorine, chlorine dioxide (ClO₂) and potassium permanganate (KMnO₄) at different oxidant concentrations, reaction times, pHs, initial iodide concentrations and bromide to iodide mass ratios. Among the six investigated I-THMs, iodoform was the major species formed during the oxidation using chlorine, ClO₂ and KMnO₄. When oxidant concentration increased from 0.1 to 3.0 mg/L, the formation of I-THMs increased and then decreased for chlorine and ClO₂, but kept increasing for KMnO₄. As the reaction time went by, I-THM concentration increased to a plateau within 10 h (ClO₂ within only 1 h, especially) for all the three oxidants. I-THM formation gradually increased from pH 3.0 to 9.0 and remained stable at pH values higher than 7.5 for chlorine; however, for ClO₂ and KMnO₄ the highest I-THM formation showed at pH 7.0 and 7.5, respectively. As initial iodide concentration increased from 20 to 800 μg/L, the total amount and species of I-THMs increased for the three oxidants. Iodide contributed to I-THM formation much more significantly than bromide. SN - 1879-2448 UR - https://www.unboundmedicine.com/medline/citation/25462746/A_comparison_of_iodinated_trihalomethane_formation_from_chlorine_chlorine_dioxide_and_potassium_permanganate_oxidation_processes_ DB - PRIME DP - Unbound Medicine ER -