O_3/NaClO协同氧化——吸附处理雨水的试验研究  

Experimental Research on the Treatment of Rainwater by O_3/ NaClO Oxidation: Adsorption Process

作　　者：王丽娟[1] 张洪丹[1] 邸松 刘博川 贺子良 

机构地区：[1]河北工业大学土木工程学院,天津300401

出　　处：《科学技术与工程》2016年第32期332-336,共5页Science Technology and Engineering

基　　金：河北省教育厅研究项目(99);河北省住房和城乡建设厅项目(2013-125)资助

摘　　要：采用O_3/NaClO协同氧化_吸附法对校园屋面雨水处理进行了试验研究。考察了粉末活性炭投加量、吸附时间、搅拌速度以及初始pH对COD、氨氮、TP和浊度去除率的影响;并进行了吸附等温线及动力学模型拟合。试验结果表明:粉末活性炭的最佳投加量为50 mg/L,最佳吸附时间为60 min,最佳搅拌速度为200 r/min,最佳初始pH为7时COD,氨氮,TP和浊度的去除率分别达到了68.87%,81.90%,78.79%,78.50%。COD和氨氮的吸附等温线更符合Freundilch模型,TP吸附等温线更符合Langmuir模型,拟二级动力学模型能更好的描述粉末活性炭对雨水中COD,氨氮和TP的吸附过程,相关系数均接近于1。The O3/ NaClO collaborative oxidation-adsorption process has been used for treating school roof rainwater. The effects of powered activated carbon dosage,adsorption time,stirring speed and p H value on the removal rate of COD,ammonia-nitrogen,TP and turbidity have been investigated. The experimental result shows that the optimal reaction conditions of powered activated carbon process are optimum powered activated carbon dosage 50 mg /L,adsorption time 20 min,stirring speed 200 r / min and p H = 7,with the removal efficiency of the rainwater COD,ammonia-nitrogen,TP and turbidity respectively reaching up to 68. 87%,81. 90%,78. 79%,78. 50% by O3/ NaClO collaborative oxidation-adsorption process; The adsorption isotherm of COD and ammonia-nitrogen fits to Freundilch and TP fits to Langmuir isothermal adsorption model. The adsorption process of COD,ammonia-nitrogen and TP on activated carbon dosage can be best described by a pseudo-second order kinetic model and the correlation coefficient is close to 1. 000.

关 键 词：臭氧 氧化 吸附 雨水回用 去除率 吸附等温线 吸附动力学 

分 类 号：X703[环境科学与工程—环境工程]