Gas\|phase Reaction of Herbicide 2-Methyl|4|chlorophenoxy Acetic Acid(MCPA) with OH Radicals

Chem. J. Chinese Universities ›› 2006, Vol. 27 ›› Issue (1): 112.

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Gas\|phase Reaction of Herbicide 2-Methyl|4|chlorophenoxy Acetic Acid(MCPA) with OH Radicals

HAN Lei, ZHU Tong, SUN Feng-Long, CHANG Jing

State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences, Peking University, Beijing 100871, China

Received:2004-12-06 Online:2006-01-10 Published:2006-01-10
Contact: 朱彤(1962年出生)，男，博士，长江特聘教授，博士生导师，从事大气化学研究. E-mail: tzhu@pku.edu.cn

Abstract

Abstract:

The investigations about the atmospheric degradation of organic herbicides became more and more important in China. In our present research, the rate constant of the reaction of 2-methyl-4-chlorophenoxy acetic acid(MCPA) with OH radicals was measured by a long path quartz reactor connecting with Fourier Transform Infrared Spectroscopy(FTIR). At 23 ℃ and under one atmosphere, the rate constant was determined to be 2.67×10^-11 cm³/(s*mol), the atmospheric life time of MCPA was estimated to be 14.9 h. The results show that MCPA can be degraded in atmosphere and is not feasible to cause wide\|spreading and persisting pollution through long range atmospheric transport.

Key words: Herbicide; 2-Methyl, 4, chlorophenoxy acetic acid(MCPA); OH radical; Reaction rate constant

CLC Number:

O644

TrendMD:

HAN Lei, SHU Tong, SUN Feng-Long, CHANG Jing. Gas\|phase Reaction of Herbicide 2-Methyl|4|chlorophenoxy Acetic Acid(MCPA) with OH Radicals[J]. Chem. J. Chinese Universities, 2006, 27(1): 112.

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Gas\|phase Reaction of Herbicide 2-Methyl|4|chlorophenoxy Acetic Acid(MCPA) with OH Radicals

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