Document Detail


Separation of phthalocyanine-like substances from humic acids using a molecular imprinting method and their photochemical activity under simulated sunlight irradiation.
MedLine Citation:
PMID:  19591473     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
To elucidate the existence of phthalocyanine-like (Pc-like) substances in humic acids (HA) and their roles in photochemical transformation of organic pollutants, Pc-imprinted polymers (MIP) were synthesized successfully and employed to separate Pc-like substances from HA. The fraction bound by MIP (F(mip-b)) presented better photochemical activity for degradation of 2,4-dichlorophenoxyacetic acid (2,4-D) in aqueous solution irradiated by simulated sunlight. The pseudo-first-order rate constant of 2,4-D photodegradation with the presence of F(mip-b) was 2.5 times as high as that in solution containing effluent fraction (F(eff)). These results show the key role of some HA with special structures in photochemistry and are helpful for better understanding phototransformation of environmental contaminants in natural aquatic systems.
Authors:
Chunyan Yu; Shuo Chen; Xie Quan; Xiaoxia Ou; Yaobin Zhang
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of agricultural and food chemistry     Volume:  57     ISSN:  1520-5118     ISO Abbreviation:  J. Agric. Food Chem.     Publication Date:  2009 Aug 
Date Detail:
Created Date:  2009-09-02     Completed Date:  2009-11-03     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0374755     Medline TA:  J Agric Food Chem     Country:  United States    
Other Details:
Languages:  eng     Pagination:  6927-31     Citation Subset:  IM    
Affiliation:
Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), School of Environmental and Biological Science and Technology, Dalian University of Technology, Dalian 116024, China.
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MeSH Terms
Descriptor/Qualifier:
2,4-Dichlorophenoxyacetic Acid / chemistry*
Herbicides / chemistry*
Humic Substances / analysis*
Indoles / chemical synthesis,  chemistry*
Molecular Imprinting
Photolysis* / radiation effects
Radiation-Sensitizing Agents / chemical synthesis,  chemistry*
Sunlight
Chemical
Reg. No./Substance:
0/Herbicides; 0/Humic Substances; 0/Indoles; 0/Radiation-Sensitizing Agents; 574-93-6/phthalocyanine; 94-75-7/2,4-Dichlorophenoxyacetic Acid

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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