改性活性炭去除饮用水中消毒副产物的实验分析

Experimental analysis of removal of disinfection by-products in drinking water by modified activated carbon

本文将普通活性炭清洗过滤后加入Fe2(SO4)3并经过高温焙烧得到改性活性炭,分析了改性活性炭在不同焙烧温度、焙烧时间以及不同Fe2(SO4)3浓度下对应的NDEA去除效果,研究了不同改性活性炭投加量、不同pH值下对应的NDEA(亚硝基二乙胺)去除效果,结果表明:(1)为达到最佳的NDEA去除效果,应控制焙烧温度为550℃,焙烧时间为1h,Fe2(SO4)3浓度为0.1mol·L^-1;(2)改性活性炭对NDEA去除率比普通活性炭高20%左右;(3)为达到较好的NDEA去除率以及NDEA吸附量应控制活性炭投加量为5mg·L^-1;(4)碱性环境下改性活性炭对水体中NDEA去除效果较好。研究结论可为进一步了解饮用水中消毒副产物的产生机理提供理论参考。

In this paper,ordinary activated carbon was cleaned and filtered,and ferric sulfate was added and calcined at high temperature to obtain modified activated carbon.The corresponding NDEA removal effects of modified activated carbon at different calcination temperatures,calcination time and different ferric sulfate concentrations were analyzed.Different modifications were studied.The effect of activated carbon dosage and corresponding NDEA removal at different pH values showed that:(1)In order to achieve the best NDEA removal effect,the calcination temperature should be controlled to 550℃,the calcination time was 1h,and the concentration of ferric sulfate was 0.1mol·L^-1;(2)The removal rate of NDEA by modified activated carbon is about 20%higher than that of common activated carbon;(3)The dosage of activated carbon should be controlled to 5mg·L^-1 to achieve better NDEA removal rate and NDEA adsorption amount;(4)Alkaline environment The modified activated carbon has better effect on the removal of NDEA in water.