摘要
研究了UV/H2O2工艺对双酚A(BPA)的降解效果及影响因素。结果表明,UV/H2O2工艺可以有效降解水体中BPA,降解过程符合一级反应动力学模型;紫外光强对BPA的降解速度影响较小;H2O2浓度对BPA的降解具有促进和抑制的双重作用;BPA初始浓度对BPA降解没有影响;在酸性条件下,有利于BPA降解;NO3-、Cl-、HCO3-对BPA降解有抑制作用;当HCO3-、NO3-、Cl-摩尔浓度均为5mmol/L时,对BPA降解的抑制程度为HCO3->NO3->Cl-。腐殖酸在低浓度时,促进BPA降解反应进行;在高浓度时,BPA的降解受到抑制。
Series of UV/H2O2 experiments were carried out to determine the effects of important factors on the removal of bisphenol A （BPA） from water by photodegradation. The UV/H2O2 treatment was effective for removing BPA, and the photodegradation process was well described by the first order degradation rate model. The UV light intensity and the initial concentration of BPA had little effect on the degradation rate. Within the low concentration range of 5-10 mg/L, the first order rate constant increased linearly with increasing initial H2O2 concentration ; however, in a higher concentration range of 20-30 mg/L, the rate constant declined with increasing initial H2O2 concentration. The degradation rate was enhanced under acidic conditions. The anions of NO3^- , Cl^- , HCO3^- inhibited the BPA photodegradation; presenting at 5 mmol/L, the order of declining effect was HCO3^-〉NO3^-〉Cl^- . Humic acid enhanced the degradation rate when it was present at a low concentration of 0. 5 mg/L; at a higher concentration （2.5 mg/L and higher）, it inhibited the BPA removal.
出处
《环境污染与防治》
CAS
CSCD
北大核心
2008年第5期22-25,54,共5页
Environmental Pollution & Control
基金
辽宁省陆地生态过程与生态系统安全重点实验室开放基金资助项目
沈阳师范大学实验中心主任基金资助项目(No.SY200610)
沈阳师范大学博士启动基金资助项目
