净水技术2011，Vol.30Issue(5)：34-39,6.
活性炭吸附水中新型含氮消毒副产物二甲基亚硝胺
Adsorption of Emergent Nitrogenous Disinfection By-Product N-Nitrosodimethylamine by Activated Carbon
摘要
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 carbon fiber and powdered activated carbon made of coal. Freundlich model was applied to describe the adsorption isotherms of coal granular activated carbon and wood powder activated carbon of NDMA absorption, with k values 1.29S and 1.462 (mg/gXL/mg), 1/n values 0.95 and 0.68, respectively, which reveal the fact that activated carbon failed to adsorb NDMA effectively. With different initial solution pH and consentration of dissolved salts, no significant changes of adsorption properity the granular activated carbon system are found. Further more, experiments of NDMA absorption by acid, alkali and nitrogen modified granular activated carbon were carried on, and the results show that none of them enhanced the adsorption efficiency, the k value of acid modified activated carbon decreased to 0.5 (mg/g)(L/mg)°, while the other two marginally reduced. Overall, it is found that some types of activated carbon act more or less effectively in the process of NDMA adsorption with low adsorption capacity. What's more, different modification methods could hardly improve the adsorption effect of NDMA by CAC. In conclusion, conventional adsorption is not useful method for NDMA removal in water treatment.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)Key words
disinfection by-products DBPs/ modified activated carbon/adsorption isotherms/N-nitrosodimethylamine (NDMA)分类
建筑与水利引用本文复制引用
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):34-39,6.基金项目
国家高技术研究发展计划(863)项目(2008AA06Z302) （863）
国家自然科学基金资助项目(51078280.50808134) （51078280.50808134）
上海市青年科技启明星计划项目(11QA1407000) （11QA1407000）
