| Characterization of dissolved organic matter fractions and its relationship with the disinfection by-product formation. | |
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MedLine Citation:
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PMID: 19402400 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Dissolved organic matter (DOM) has been identified as precursor for disinfection by-products (DBPs) formation during chlorination. Recently, it has been demonstrated that the characteristics of DOM influence the DBPs formation mechanism. A study was, therefore, initiated to investigate the effects of DOM fractions on DBPs formation mechanism. In the chlorination process, organic acids are dominant precursors of total thihalomethanes (TTHM) because of the v(c-o) and unsaturated structures. Furthermore, the TTHM formation of organic acids was affected by pH more greatly. Based on the fluorescence spectroscopy analysis, DOM fractions contained several fluorescence substances. During chlorination, humic acid-like substances were found to exhibit high chlorine reactivity and hydrophobic organics decomposed to smaller molecules faster than hydrophilic organics even at lower chlorine dosages. Unlike hydrophobic fractions, hydrophilic organics showed no toxicity following chlorination, suggesting that the toxic structures in hydrophilic organics showed high chlorine reactivity during chlorination. |
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Authors:
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Hua Zhang; Jiuhui Qu; Huijuan Liu; Dongbin Wei |
Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Journal of environmental sciences (China) Volume: 21 ISSN: 1001-0742 ISO Abbreviation: J Environ Sci (China) Publication Date: 2009 |
Date Detail:
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Created Date: 2009-04-30 Completed Date: 2009-06-11 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 100967627 Medline TA: J Environ Sci (China) Country: Netherlands |
Other Details:
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Languages: eng Pagination: 54-61 Citation Subset: IM |
Affiliation:
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Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China. zhanghua7977@163.com |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Acetonitriles
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chemistry Biological Assay Chlorine / chemistry Disinfectants / chemistry*, toxicity Halogenation Hydrogen-Ion Concentration Kinetics Organic Chemicals / chemistry* Photobacterium / drug effects Solubility Spectrometry, Fluorescence Spectroscopy, Fourier Transform Infrared Trihalomethanes / chemistry Water Purification |
| Chemical | |
Reg. No./Substance:
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0/Acetonitriles; 0/Disinfectants; 0/Organic Chemicals; 0/Trihalomethanes; 545-06-2/trichloroacetonitrile; 7782-50-5/Chlorine |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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