| Phthalic acid esters in dissolved fractions of landfill leachates. | |
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MedLine Citation:
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PMID: 17631939 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The distribution of phthalic acid esters (PAEs) (including diisobutylphthalate (DIBP), di-n-butylphthalate (DnBP) and bis(2-ethyl)hexylphthalate (DEHP)) in dissolved organic matter (DOM) fractions of leachates from sanitary or bioreactor landfills was evaluated. The leachate DOM was fractionated into humic acid (HA), fulvic acid (FA) and hydrophilic (HyI) fractions. Measurements showed that the PAEs were bound mostly to the HA fraction in leachate, regardless of their landfill age or the presence of leachate recirculation. The PAEs affinity for HA and FA differed considerably relative to the sorption coefficients reported for model compounds. Molecular weight of DOM correlated with PAEs partition in collected leachate samples fractions while aromaticity was a poor predictor. Based on the presence of phenolic, carboxyl or amide groups in DOM fractions, hydrogen bonding is likely to be involved in interactions between PAEs and leachate DOM. The peptide groups, particularly presented in HA fraction, might explain the strong affinity of PAEs for HA. The fluorescence excitation emission matrix contour plots showed that the HyI fractions shared certain similarities with humic substances in terms of molecular structure, which may be one reason why PAEs exhibited a clear sorption to the HyI fractions. |
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Authors:
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Zhong Zheng; Pin-Jing He; Li-Ming Shao; Duu-Jong Lee |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2007-06-21 |
Journal Detail:
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Title: Water research Volume: 41 ISSN: 0043-1354 ISO Abbreviation: Water Res. Publication Date: 2007 Dec |
Date Detail:
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Created Date: 2007-11-20 Completed Date: 2008-03-11 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0105072 Medline TA: Water Res Country: England |
Other Details:
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Languages: eng Pagination: 4696-702 Citation Subset: IM |
Affiliation:
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State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai 200092, PR China. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adsorption Benzopyrans / chemistry* China Environmental Monitoring Humic Substances* Phthalic Acids / analysis*, chemistry Refuse Disposal Solubility Water Pollutants, Chemical / analysis*, chemistry |
| Chemical | |
Reg. No./Substance:
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0/Benzopyrans; 0/Humic Substances; 0/Phthalic Acids; 0/Water Pollutants, Chemical; 479-66-3/fulvic acid |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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