Degradation of N-nitrosodimethylamine (NDMA) and its precursor   dimethylamine (DMA) in mineral micropores induced by microwave   irradiation

doi:10.1016/j.watres.2016.02.065

CORC > 北京大学 > 城市与环境学院

	Degradation of N-nitrosodimethylamine (NDMA) and its precursor dimethylamine (DMA) in mineral micropores induced by microwave irradiation
	He, Yuanzhen ; Cheng, Hefa
刊名	WATER RESEARCH
	2016
关键词	N-nitrosodimethylamine (NDMA) Dimethylamine (DMA) Sorption Microporous mineral Microwave-induced degradation Water treatment DRINKING-WATER AQUEOUS-SOLUTION REVERSE-OSMOSIS LOW-PRESSURE WASTE-WATER NITROSAMINES ZEOLITES OZONATION ADSORPTION OXIDATION
DOI	10.1016/j.watres.2016.02.065
英文摘要	Removal of N-nitrosodimethylamine (NDMA) in drinking water treatment poses a significant technical challenge due to its small molecular size, high polarity and water solubility, and poor biodegradability. Degradation of NDMA and its precursor, dimethylamine (DMA), was investigated by adsorbing them from aqueous solution using porous mineral sorbents, followed by destruction under microwave irradiation. Among the mineral sorbents evaluated, dealuminated ZSM-5 exhibited the highest sorption capacities for NDMA and DMA, which decreased with the density of surface cations present in the micropores. In contrast, the degradation rate of the sorbed NDMA increased with the density of surface cations under microwave irradiation. Evolutions of the degradation products and C/N ratio indicate that the sorbed NDMA and DMA could be eventually mineralized under continuous microwave irradiation. The degradation rate was strongly correlated with the bulk temperature of ZSM-5 and microwave power, which is consistent with the mechanism of pyrolysis caused by formation of micro-scale "hot spots" within the mineral micropores under microwave irradiation. Compared to existing treatment options for NDMA removal, microporous mineral sorption coupled with microwave-induced degradation has the unique advantages of being able to simultaneously remove NDMA and DMA and cause their full mineralization, and thus could serve as a promising alternative method. (C) 2016 Elsevier Ltd. All rights reserved.; Natural Science Foundation of China [41472324, 41322024]; National Program for Support of Top-notch Young Professionals; SCI(E); EI; PubMed; ARTICLE; hefac@umich.edu; 305-314; 94
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/434522]
专题	城市与环境学院
推荐引用方式 GB/T 7714	He, Yuanzhen,Cheng, Hefa. Degradation of N-nitrosodimethylamine (NDMA) and its precursor dimethylamine (DMA) in mineral micropores induced by microwave irradiation[J]. WATER RESEARCH,2016.
APA	He, Yuanzhen,&Cheng, Hefa.(2016).Degradation of N-nitrosodimethylamine (NDMA) and its precursor dimethylamine (DMA) in mineral micropores induced by microwave irradiation.WATER RESEARCH.
MLA	He, Yuanzhen,et al."Degradation of N-nitrosodimethylamine (NDMA) and its precursor dimethylamine (DMA) in mineral micropores induced by microwave irradiation".WATER RESEARCH (2016).