中文摘要：

研究了五种常见阴离子对过硫酸氢盐（PMS）的活化效能，并探讨了几个关键因素（PMS浓度、阴离子浓度、pH值和腐殖酸等）对过硫酸氢盐氧化甲氧苄啶（TMP）的影响。结果表明，CO3^2-、Cl^-和HPO4^2-均能够不同程度地活化PMS降解TMP；而SO4^2-和NO3^-对PMS基本没有活化能力。随着PMS浓度的升高，HPO4^2-对PMS的活化效果呈现先升高后降低的趋势，而Cl^-和CO3^2-对PMS的活化能力则逐渐增强。随着阴离子浓度的升高Cl^-和HPO4^2-对PMS的活化能力均有一定程度的提高，而CO3^2-却表现出相反的规律。pH值对阴离子活化PMS的影响应综合考虑阴离子对PMS的活化作用以及PMS的碱活化作用。水中存在的腐殖酸并不会严重抑制阴离子对PMS的活化。Cl^-和CO3^2-均能与PMS发生反应，分别生成非自由基型活性物种HOCl和HCO4^-；而在酸性条件下，HPO4^2-活化PMS生成的主要自由基为SO4^-。

英文摘要：

The activation performance of peroxymonosulfate （PMS）by five common anions was studied through batch experiments, in which the effect of several key factors such as PMS concentrations, anion concentrations, initial pH and humic acid on oxidation of trimethoprim （TMP） by PMS was investi-gated. The results showed that CO3^2-, Cl^- and HPO4^2- could activate PMS to oxidize TMP to different degrees, while SO4^2- and NO3- exhibited insignificant performance for the activation of PMS. As the PMS concentrations increased, the activation performance of HPO4^2- firstly increased and then decreased, however, the activation performance of Cl^- and CO3^2- both significantly enhanced. The activation effects of Cl^- and HPO4^2- were both improved to some extent as the anion concentrations increased, but CO3^2- showed the opposite law. Effect of pH values on activation of PMS by anions should comprehensively consider the activation of PMS by anions and the alkali activation of PMS. The presence of humic acid would not seriously inhibit the activation of PMS by anions. Cl^- and CO3^2- could react with PMS and generate non-radical reactive species HOCl and HCO4^-, respectively. However, HPO4^2- could effectively activate PMS and the generated main reactive species were SO4^- · under acidic conditions.