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	Size fractionation of organic matter and heavy metals in raw and treated leachate
	Li, Rui ; Yue, Dongbei ; Liu, Jianguo ; Nie, Yongfeng
	2010-10-12 ; 2010-10-12
关键词	LANDFILL-LEACHATE SPECIATION SORPTION Engineering, Environmental Environmental Sciences
中文摘要	This study characterized the organic matter and heavy metals in the leachate from two typical municipal solid waste (MSW) sanitary landfills in China, the recently established (3-year-old) Liulitun landfill and the mature (11-year-old) Beishenshu landfill, using a size fractionation procedure. The organic matter of all raw and treated leachate samples primarily existed in a truly-dissolved fraction with an apparent molecular weight (AMW) of <1 kDa, and its percentage decreased with an increase in overall AMW. The leachate from the newer landfill had a higher percentage of truly-dissolved organic matter. After anaerobic treatment, this leachate had a similar size fraction of organic matter to that seen for the raw leachate of the mature landfill. Biochemical processes had different removal efficiencies for various types of AMW organic matter, and the concentration of moderate AMW organic matter appeared to increase throughout these processes. Most of the heavy metals existed in a colloidal fraction (AMW >1 kDa and particle size <0.45 mu m). The behaviors of different species of heavy metals had large variations. The size fractions of heavy metal species were significantly affected by treatment processes and landfill age, except for Zn. The concentration ratio of heavy metals to organic matter was maximal in the colloidal fraction and showed an inverse change to that seen for organic matter concentration changes caused by biochemical processes. Consequently, the pollution levels of heavy metals were substantially increased by treatment processes, although their concentrations decreased. (C) 2009 Elsevier Ltd. All rights reserved.
语种	英语 ; 英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD ; OXFORD ; THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/79681]
专题	清华大学
推荐引用方式 GB/T 7714	Li, Rui,Yue, Dongbei,Liu, Jianguo,et al. Size fractionation of organic matter and heavy metals in raw and treated leachate[J],2010, 2010.
APA	Li, Rui,Yue, Dongbei,Liu, Jianguo,&Nie, Yongfeng.(2010).Size fractionation of organic matter and heavy metals in raw and treated leachate..
MLA	Li, Rui,et al."Size fractionation of organic matter and heavy metals in raw and treated leachate".(2010).

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