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活性炭吸附水中新型含氮消毒副产物二甲基亚硝胺
引用本文:田康宁,徐斌,夏圣骥,高乃云,沈开源.活性炭吸附水中新型含氮消毒副产物二甲基亚硝胺[J].净水技术,2011,30(5):34-39.
作者姓名:田康宁  徐斌  夏圣骥  高乃云  沈开源
作者单位:同济大学污染控制与资源化研究国家重点实验室,长江水环境教育部重点实验室,上海200092
基金项目:国家高技术研究发展计划(863)项目,国家自然科学基金资助项目,上海市青年科技启明星计划项目
摘    要:二甲基亚硝胺(N-nitrosodimethylamine, NDMA)是水处理领域中颇为关注的强致癌性新兴含氮消毒副产物。该文系统研究了常见水处理材料及各类型改性颗粒炭活性炭(GAC)对NDMA的静态吸附特征。研究发现煤质颗粒活性炭和木质粉末活性炭对NDMA具有较好的吸附效果,活性炭纤维和煤质粉末活性炭次之,而石英砂、粉末沸石和硅藻土等基本不能吸附NDMA;煤质颗粒活性炭和木质粉末活性炭吸附NDMA的等温线可采用Freundlich模型描述,其k值仅分别为1.295和1.462(mg/g)(L/mg)^n,其1/n值分别为0.95和0.68,该结果说明活性炭难于有效吸附水中NDMA;起始溶液pH和不同离子背景条件下,颗粒活性炭的NDMA系统未见明显变化;对吸附效果较好的颗粒活性炭进行酸改性、碱改性和氮气热改性,结果表明三种改性方法均无法有效提高颗粒活性炭吸附NDMA的效果,酸性改性活性炭Freundlich吸附等温线的k值下降为0.5(mg/g)(L/mg)^n,其它两种改性方法较原碳的吸附容量略有降低。总体研究表明,部分类型活性炭对NDMA具有一定的吸附效果,但吸附容量均较低,不同改性方法均难于有效提高GAC吸附NDMA吸附效果,水处理用常规吸附法难于应对水中NDMA污染。

关 键 词:消毒副产物  改性活性炭  吸附等温线  二甲基亚硝胺(NDMA)

Adsorption of Emergent Nitrogenous Disinfection By-Product N-Nitrosodimethylamine by Activated Carbon
Tian Kangning,Xu Bin,Xia Shengji,Gao Naiyun,Shen Kaiyuan.Adsorption of Emergent Nitrogenous Disinfection By-Product N-Nitrosodimethylamine by Activated Carbon[J].Water Purifcation Technology,2011,30(5):34-39.
Authors:Tian Kangning  Xu Bin  Xia Shengji  Gao Naiyun  Shen Kaiyuan
Affiliation:Tian Kangning,Xu Bin,Xia Shengji,Gao Naiyun,Shen Kaiyuan(State Key Laboratory of Pollution Control and Resource Reuse,Tongji University,Key Laboratory of Yangtze Aquatic Environment,Ministry of Education,Shanghai 200092,China)
Abstract:In water treatment,N-nitrosodimethylamine(NDMA) is a newly detected nitrogenous disinfection by-product,which is extremely cancerogenic to human health.The paper investigated the adsorption characteristics of common materials used in water treatment such as activated carbon.The result indicate that the quartz sands,zeolite and diatomaceous earth powder are barely capable of adsorbing NDMA,Coal granular activated carbon and wood powder activated carbon possesse the best adsorption performance yet activated c...
Keywords:disinfection by-products DBPs modified activated carbon adsorption isotherms N-nitrosodimethylamine(NDMA)  
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