School of Environmental and Safety Engineering, Changzhou University, Jiangsu, 213164, China; Guangxi Key Laboratory of Green Processing of Sugar Resources, College of Biological and Chemical Engineering, Guangxi University of Science and Technology, Guangxi, 545006, China.
School of Environmental and Safety Engineering, Changzhou University, Jiangsu, 213164, China.
Chemosphere. 2019 Aug;228:595-601. doi: 10.1016/j.chemosphere.2019.04.182. Epub 2019 Apr 27.
The homogeneous Fe(VI)/NaSO system has been proposed for highly efficient degradation of recalcitrant contaminants, in which sulfite could significantly enhance the transformation of organic substrate by Fe(VI). Also, the Fe(VI)/NaHSO system could show high efficiency across a wide range of pH conditions. The degradation rates reached up to 80% within 2 min and 70% within 5 min in strongly acidic and alkaline conditions, respectively. Unexpectedly, a faster removal rate was obtained in Fe(VI)/NaHSO system than that in Fe(VI)/NaSO system for the degradation of methylene blue (MB). A reasonable dye degradation mechanism was proposed and verified by a series of experiments. The high oxidation potential of Fe(VI) and other species such as sulfate and hydroxyl radicals were responsible for the outstanding capabilities of Fe(VI)/NaHSO system, which could significantly improve the treatment of organics in wastewater under a very wide range of pH conditions.
均相 Fe(VI)/NaSO 体系已被提议用于高效降解难处理的污染物，其中亚硫酸盐可通过 Fe(VI)显著增强有机底物的转化。此外，Fe(VI)/NaHSO 体系在很宽的 pH 条件范围内都能表现出高效性。在强酸性和碱性条件下，分别在 2 分钟内达到高达 80%和 5 分钟内达到 70%的降解速率。出乎意料的是，Fe(VI)/NaHSO 体系对亚甲基蓝 (MB) 的降解速率比 Fe(VI)/NaSO 体系快。通过一系列实验提出并验证了一个合理的染料降解机制。Fe(VI)和其他物质（如硫酸盐和羟基自由基）的高氧化电位是 Fe(VI)/NaHSO 体系卓越性能的原因，它可以在非常宽的 pH 条件范围内显著改善废水处理中的有机物。
