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作 者:彭广勇[1] 高乃云[1] 汪雪姣[1] 张可佳[1] 隋铭皓[1]
机构地区:[1]同济大学污染控制与资源化研究国家重点实验室,上海200092
出 处:《中国给水排水》2008年第17期105-108,共4页China Water & Wastewater
基 金:国家"十一五"科技支撑计划项目(2006BAJ08B06;2006BAJ08B02);国家高技术研究发展计划(863)项目(2002AA601130)
摘 要:采用间歇性取样的试验方法,研究了氯消毒过程中不同反应条件下苯酚氯代生成2-氯酚的规律,考察了苯酚初始浓度、加氯量、pH值、温度和氨氮浓度对苯酚氯代效果的影响。结果表明,随着苯酚初始浓度的增加,2-氯酚的生成速率加快、峰值浓度增大;加氯量的增大只加快2-氯酚的生成速率,并不改变其浓度峰值的大小;温度升高,2-氯酚的氯代反应速度加快、氯代率升高;pH值对2-氯酚生成的影响较大,在弱酸性和强碱性条件下苯酚氯化生成2-氯酚的速度相对较慢,而中性和弱碱性条件下的生成速度相对较快;随着氨氮浓度的逐渐增大,2-氯酚浓度峰值出现的时间逐渐后移,并且峰值越来越小。The characteristics of forming 2-chlorophenol by chlorinated phenol under different conditions during disinfection were studied by using intermittent sampling method. The influencing factors were investigated, such as initial concentration of phenol, chlorine dosage, pH value, temperature and ammonia nitrogen concentration. The results show that the formation velocity of 2-chlorophenol is accelerated and the concentration peak value of 2-chlorophenol increases with increasing of initial concentration of phenol. The increase of chlorine dosage only accelerates the formation velocity of 2-chlorophenol, but does not affect the 2-chlorophenol concentration peak value. The chlorination velocity is speeded up and the chlorination rate rises with temperature increasing. The pH value influences the formation of 2-chloro- phenol greatly. The formation velocity of 2-chlorophenol is relatively slow in weakly acidic and strongly alkaline conditions, but is relatively fast in slightly alkaline or neutral conditions. With increasing of ammonia nitrogen concentration, the time when 2-chlorophenol concentration reaches the peak value is delayed, and the peak value becomes smaller and smaller.
分 类 号:X703[环境科学与工程—环境工程]
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