Fenton试剂降解内分泌干扰物双酚A的研究

Degradation of Bisphenol A in Water by Fenton Reagent

采用单独Fe2+、单独H2O2和单独Fenton试剂去除水中内分泌干扰物双酚A(BPA),考察了Fe2+与H2O2的投加量、pH值以及BPA初始浓度对BPA降解效果的影响。研究表明,单独Fe2+和单独H2O2都不能有效去除BPA,而Fe2+与H2O2联用后生成的Fenton试剂对BPA具有良好的去除效果。在BPA初始浓度为5 mg/L、Fe2+投加量为5.6 mg/L(以FeSO4.7H2O计)、H2O2投量为7 mg/L、pH值为3.94的条件下,反应30 min后对BPA的去除率高达99.12%。在低投加量范围内,随着Fe2+和H2O2投量的增加,对BPA的去除率迅速提高,当其投量提高到一定水平后则去除率不再提高。pH值对BPA的降解影响显著,当pH值为3.94时对BPA的去除率最高。BPA初始浓度对其降解效果几乎没有影响。

Single Fe^2＋, single H2O2 and single Fenton reagent were used to remove endocrine disruptmg chemical bisphenol A （BPA） from water. The effects of dosages of Fez ＋ and H2O2 , pH value and initial concentration of BPA on degradation efficiency of BPA were investigated. The results show that BPA can not be effectively removed by single Fe^2＋ and single H2O2. However, Fenton reagent （FE^2＋H2O2） is able to degrade BPA effectively. The removal rate of BPA in 30 rain comes to 99.12% when the initial concentration of BPA is 5 mg/L, the dosage of Fe^2＋ is 5.6 nag/L, the dosage of H2O2 is 7 rag/L, and pH value is 3.94. In the range of low dosages, the removal rate of BPA rises with the increase of Fe^2＋ and HaO2 dosages. After their dosages reach certain levels, the removal rate increases no longer. The effect of pH value is very marked, and the removal rate of BPA is the highest when pH is 3.94. The initial concentration of BPA does not nearly affect its degradation efficiency.