Document Detail


Characterization and removal of dissolved organic matter (DOM) from landfill leachate rejected by nanofiltration.
MedLine Citation:
PMID:  18947991     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Dissolved organic matter (DOM) from wastewater rejected by nanofiltration from a landfill leachate treatment plant was fractionated into humic acid (HA), fulvic acid (FA) and hydrophilic (HyI) fractions. It was found that humic substances (HA and FA) composed 75% of the total dissolved organic carbon (DOC) concentration of the DOM, with an average molecular weight of about 1000 Da. Elemental analysis, infrared spectroscopy, UV-visible spectroscopy and acid-base titration observations showed that the HA and FA of the DOM exhibited lower fractions of condensed aromatic functional groups but larger fractions of acidic groups compared with other aquatic DOMs. The properties of HA and FA were similar, but HA exhibited more complete humification, while the HyI fraction had more acidic groups. An aminated polymeric adsorbent NDA-8 was used to adsorb the DOM in the wastewater along with primary coagulation. Results of bench-scale experiments indicated that the treatment process could effectively remove the DOM and heavy metals while desorption liquid was 10 times more condensed than raw wastewater. Results of desorption and reproducibility tests consolidated the strong application potential of this treatment process as an advanced landfill leachate treatment technology.
Authors:
Long Zhang; Aimin Li; Yufei Lu; Lei Yan; Sheng Zhong; Conglin Deng
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2008-10-22
Journal Detail:
Title:  Waste management (New York, N.Y.)     Volume:  29     ISSN:  0956-053X     ISO Abbreviation:  Waste Manag     Publication Date:  2009 Mar 
Date Detail:
Created Date:  2009-01-14     Completed Date:  2009-04-06     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9884362     Medline TA:  Waste Manag     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1035-40     Citation Subset:  IM    
Affiliation:
State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Hankou Road, Nanjing University, Nanjing 210093, China.
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MeSH Terms
Descriptor/Qualifier:
Adsorption
Benzopyrans / chemistry,  isolation & purification
Carbon / isolation & purification
Humic Substances
Metals, Heavy / chemistry,  isolation & purification
Molecular Weight
Nanotechnology
Organic Chemicals / chemistry,  isolation & purification*
Refuse Disposal / instrumentation,  methods*
Solubility
Spectrophotometry, Ultraviolet
Spectroscopy, Fourier Transform Infrared
Titrimetry
Ultrafiltration / instrumentation,  methods*
Water Pollutants, Chemical / chemistry,  isolation & purification*
Chemical
Reg. No./Substance:
0/Benzopyrans; 0/Humic Substances; 0/Metals, Heavy; 0/Organic Chemicals; 0/Water Pollutants, Chemical; 479-66-3/fulvic acid; 7440-44-0/Carbon

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