Fe^(2+)/PMS高级氧化体系对水体里Cl^(-)的影响探究

Effect of Fe^(2+)/PMS Advanced Oxidation System on Cl^(-) in Water

针对Fe^(2+)/过一硫酸盐(PMS)的高级氧化体系在水处理问题上被广泛应用的现象,采用Fe^(2+)/PMS的体系,研究以氯离子(Cl^(-))为目标物,在多种影响因素下的转化率和生成产物。结果表明,当pH=3,Fe^(2+)与PMS的摩尔浓度比例为0.8∶1时,Cl^(-)的转化效果最好。当Cl^(-)取20μmol·L^(-1)时,转化率为43%,转化产物仅为次氯酸(HClO)。随着p H的上升,Cl^(-)转化效果会变差,Fe^(2+)与PMS的摩尔浓度比例和Cl^(-)自身的浓度也会影响反应效果。

In view of the phenomenon that advanced oxidation system of Fe^(2+)/permonosulfate(PMS)has been widely used in water treatment,Fe^(2+)/PMS system was used to study the conversion rate and production products of chloride ion(Cl^(-))as the target substance under various influencing factors.The results showed that the conversion effect of Cl^(-)was the best when the pH was 3 and the molar ratio of Fe^(2+)to PMS was 0.8∶1.When Cl^(-)was 20μmol·L^(-1),the conversion rate was 43%,and the conversion product was only hypochlorous acid(HClO).With the increase of pH,the conversion effect of Cl^(-)became worse.The molar ratio of Fe^(2+)to PMS and the concentration of Cl^(-)itself also affected the reaction effect.