Separation of Phthalocyanine-like Substances from Humic Acids Using a Molecular Imprinting Method and Their Photochemical Activity under Simulated Sunlight Irradiation

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 (...

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Bibliographic Details
Published in:Journal of agricultural and food chemistry 2009-08, Vol.57 (15), p.6927-6931
Main Authors: Yu, Chunyan, Chen, Shuo, Quan, Xie, Ou, Xiaoxia, Zhang, Yaobin
Format: Article
Language:English
Subjects:
2,4-Dichlorophenoxyacetic Acid - chemistry
Biological and medical sciences
Environmental Chemistry
Food industries
Fundamental and applied biological sciences. Psychology
Herbicides - chemistry
Humic Substances - analysis
Indoles - chemical synthesis
Indoles - chemistry
Molecular Imprinting
Photolysis - radiation effects
Radiation-Sensitizing Agents - chemical synthesis
Radiation-Sensitizing Agents - chemistry
Sunlight
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Summary: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 (Fmip-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 Fmip-b was 2.5 times as high as that in solution containing effluent fraction (Feff). 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.
ISSN:0021-8561
1520-5118
DOI:10.1021/jf9016459