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Fractionation of dissolved organic matter in mature landfill leachate [An article from: Chemosphere]
Book Details
Author(s)Y.D. Xu, D.B. Yue, Y. Zhu, Y.F. Nie
PublisherElsevier
ISBN / ASINB000P6O6IQ
ISBN-13978B000P6O6I0
AvailabilityAvailable for download now
Sales Rank99,999,999
MarketplaceUnited States 🇺🇸
Description
This digital document is a journal article from Chemosphere, published by Elsevier in 2006. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.
Description:
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 441mgl^-^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 1kDa and 1-3.5kDa, 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 HS in mature leachate from inorganic components. For achieving the main requirements as a fertilizer product, second retentate was further concentrated by evaporation, and contents of organic matter and dry-solids were obtained 13wt.% and 25wt.%, respectively. This study confirmed the feasibility of recycling HS from mature leachate.
Description:
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 441mgl^-^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 1kDa and 1-3.5kDa, 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 HS in mature leachate from inorganic components. For achieving the main requirements as a fertilizer product, second retentate was further concentrated by evaporation, and contents of organic matter and dry-solids were obtained 13wt.% and 25wt.%, respectively. This study confirmed the feasibility of recycling HS from mature leachate.
