Université de Poitiers, CNRS, Laboratoire de Chimie et Microbiologie de l'Eau (UMR 6008), Ecole Nationale Supérieure d'Ingénieurs de Poitiers, 1 rue Marcel Dore, 86022 Poitiers Cedex, France.
J Hazard Mater. 2011 Jun 15;190(1-3):403-8. doi: 10.1016/j.jhazmat.2011.03.059. Epub 2011 Mar 23.
These days, the use of persulfate in advanced oxidation processes (AOPs) has gained more attention as an emerging clean and efficient technology to degrade the organic pollutants. The objective of this study was to investigate the effect of the addition of persulfate on the oxidation of benzotriazole (BT) and humic acids (HAs) by irradiation. The degradation of BT (3.7 μM) was followed under the influence of persulfate addition (200-500 μM) in combination with a fixed radiation dose (15 Gy) in the absence and presence of HA (5 and 20mg/L) in deionized water. The main results obtained in this study on the degradation of BT in the presence of HA showed a different effect of S(2)O(8)(2-) addition during irradiation, depending on whether HA are oxidized or not-oxidized. (1) An inhibitory effect of S(2)O(8)(2-) was observed in the presence of non-oxidized HA. (2) The removal of BT was generally more important during irradiation in the presence of S(2)O(8)(2-) when HA is pre-oxidized. This could be explained by the different structures of humic acids. These differences of structures of HA were identified by physico-chemical parameters such as the absorbance in the UV (254 nm), the fluorescence and the SUVA measurement.
目前，过硫酸盐在高级氧化工艺（AOPs）中的应用作为一种新兴的清洁高效技术，受到越来越多的关注，可用于降解有机污染物。本研究的目的是研究在辐照下添加过硫酸盐对苯并三唑（BT）和腐殖酸（HA）氧化的影响。在不存在和存在去离子水中 HA（5 和 20mg/L）的情况下，在固定辐射剂量（15Gy）下，研究了添加过硫酸盐（200-500μM）对 BT（3.7μM）的降解情况。本研究在 HA 存在下 BT 降解的主要结果表明，辐照过程中添加 S(2)O(8)(2-)的效果不同，取决于 HA 是否被氧化。（1）在非氧化 HA 的存在下观察到 S(2)O(8)(2-)的抑制作用。（2）当 HA 预先氧化时，在辐照过程中存在 S(2)O(8)(2-)时，BT 的去除通常更为重要。这可以通过腐殖酸的不同结构来解释。通过物理化学参数，如紫外光（254nm）的吸光度、荧光和 SUVA 测量，可以识别 HA 的这些结构差异。
