【摘要】 采用UV/H2O2间歇式光氧化反应器,研究了溶液pH值、腐殖酸及水中常见阴离子HCO3-、NO3-、CO32-、Cl-和SO42-对UV/H2O2工艺降解17α-乙炔基雌二醇(EE2)的影响.结果表明,UV/H2O2工艺可以有效地去除水中的EE2,光降解过程符合一级反应动力学模型.双氧水投加量为5 mg/L时,在14W低压汞灯照射下,EE2在自来水和蒸馏水中的光降解一级反应速率常数为0.063 0min-1和0.132 4min-1.溶液中的腐殖酸和阴离子HCO3-、NO3-、Cl-、SO42-对EE2的光降解反应有抑制作用,4种阴离子浓度为5 mmol/L时,抑制作用依次为HCO3->SO42->Cl->NO3-,HCO3-可使光降解速率常数降低到50%.自来水中的光降解速率常数低于蒸馏水中的光降解速率常数是水中多种离子影响的结果.更多还原

【Abstract】 Effect of pH,HA and anions HCO^-₃,NO^-₃,CO^2-₃,Cl^-and SO^2-₄ in aqueous solution on the photodegradation of 17α-ethynyestradiol（EE2）was studied by using a batch photo-reactor.The results show that 17α-ethynyestradiol（EE2）could be removed effectively by the UV/H₂O₂ process.The rate of photodegradation in aqueous solution follows first-order kinetics.When H₂O₂ was dosed as 5（mg/L,） irradiated by a 14W low pressure mercury vapor discharge lamp,the first-order photodegradation rate constant of EE2 in distilled water and tap water were（0.063?0）min^-1 and（0.132?4）min^-1 respectively.HA,HCO^-₃,NO^-₃,Cl^-and SO^2-₄ have inhibitory action on EE2 photodegradation.when their concentrations at 5（mmol/L）,their inhibitory action: HCO^-₃ > SO^2-₄ > Cl^-> NO^-₃.HCO^-₃ induced photodegradation rate constant of EE2 reduced by half,It was anions synthesize effect that caused photodegradation rate constant of EE2 in tap water lower than distilled water.更多还原