摘要
采用常用消毒剂次氯酸钠对内分泌干扰物双酚A（BPA）的氧化消除及动力学规律进行研究,考察了加氯量、BPA初始浓度、pH值、Br-浓度和温度各因素对降解效果的影响.结果表明,次氯酸钠对BPA的氧化降解过程符合拟一级反应动力学;pH值对该降解反应影响较大,当pH为8～9时,BPA与HOCl的反应速率达到最大为0.5443 min-1;溶液中存在Br-会加快BPA的降解,并且其整体反应不符合拟一级动力学规律,随着Br-浓度的增加,BPA降解得越快;温度对该降解反应的影响较大并且符合Van’t Hoff规则,提高反应温度,有利于氯对BPA的降解.
The degradation and its kinetics of sodium hypochlorite oxidation of an endocrine disruptor-bisphenol A （BPA） were studied. The influencing factors were investigated, such as chlorine dosage, initial concentration of BPA, pH value, bromide ion concentration and temperature etc. The results showed that the degradation of BPA by sodium hypochlorite followed pseudo-first-order kinetics. The pH value influenced the degradation of BPA greatly. The pseudo-first-order rate constant of the reaction between BPA and HOC1 reached the maximum value of 0. 544 3 min^-1 during pH 8 - 9. Moreover, the bromine ion in water would accelerate the degradation of BPA, and the whole reaction did not follow the rule of pseudo-first-order kinetics. The temperature influenced the reaction greatly, and it followed Van＇t Hoff Rule. The removal efficiency of BPA would increase with increasing temperature.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2007年第11期2544-2549,共6页
Environmental Science
基金
上海市科学技术委员会基础研究重点项目(05JC14059)
国家高技术研究发展计划(863)项目(2002AA601130)
国家科技攻关计划重大项目(2003A808A17)
关键词
内分泌干扰物
双酚A
氯化
pH
溴离子
温度
endocrlne disruptor
bisphenol A
chlorination
pH
bromide ion
temperature
