Fractionation of dissolved organic matter in mature landfill leachate and its recycling by ultrafiltration and evaporation combined processes

Chemosphere
Yu-Dong XuYong-Feng Nie

Abstract

XAD resin procedure was used to isolate dissolved organic matter (DOM) of a mature leachate collected from a municipal solid waste landfill in Beijing, China. The fulvic acids fraction dominated in collected leachate, accounting for 64% of DOM as dissolved organic carbon (DOC), and a high concentration of humic substances (HS) with a value of 441 mg l(-1) was found in the leachate. Molecular size distribution of DOM was also done by using batch ultrafiltration (UF) technique. Two major parts of the molecules of DOM were distributed in the regions of smaller than 1 kDa and 1-3.5 kDa, containing 45% and 43% of DOM as DOC, respectively. The laboratory-scale experiments were conducted to investigate and to develop an overall concept for mature leachate recycling based on UF and evaporation combined processes. Separation factor (SF) was applied to evaluate separation efficiency of UF. The data indicate that SF is strongly correlated with concentration factor. Second retentate from two-stage UF contained relatively high amount of DOM comprising 91% of HS and an insignificant concentration of heavy metals. The SF value for two-stage UF was more than 10. These results demonstrate that two-stage UF could effectively separate and refine ...Continue Reading

References

Nov 26, 2003·Chemosphere·Antonio LopezAppio Claudio Di Pinto
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Citations

Dec 19, 2012·Environmental Science and Pollution Research International·Hanife SariOmer Apaydin
Jan 31, 2016·Journal of Environmental Management·Fatima BenyoucefAziz Ouatmane
Jun 26, 2008·Journal of Environmental Sciences (China)·Shouliang HuoHongliang Liu
Jul 8, 2010·Journal of the Science of Food and Agriculture·Ana de Santiago, Antonio Delgado
Oct 1, 2017·Environmental Science and Pollution Research International·Yunfeng XuGuangren Qian
Mar 17, 2007·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·Rasool B MaharYongfeng Nie
May 29, 2009·Water Environment Research : a Research Publication of the Water Environment Federation·Míriam C S AmaralSérgio F Aquino
Oct 28, 2019·Environmental Science and Pollution Research International·Xu RenDan Liu
Jun 15, 2021·Journal of Environmental Management·Hengfeng ZhangMawuli Dzakpasu

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