VOLATILIZATION OF METOLACHLOR FROM WATER

被引：10

作者：

LAU, YL

LIU, DLS

PACEPAVICIUS, GJ

MAGUIRE, RJ

机构：

[1] Aquatic Ecosystem Protection Branch, National Water Research Institute, Denartment of the Environment, L7R 4A6, Burlington, Ontario

来源：

JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART B-PESTICIDES FOOD CONTAMINANTS AND AGRICULTURAL WASTES | 1995年 / 30卷 / 05期

关键词：

METOLACHLOR; VOLATILITY; HENRYS LAW; TEMPERATURE EFFECT;

D O I：

10.1080/03601239509372956

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The volatilization of metolachlor [2-chloro-N-(2-ethyl-6-methylphenyl)N-(2-methoxy-1-methylethyl)acetamide]from water was studied in the laboratory and in an outdoor open-channel experiment. As expected, volatilization was not significant at temperatures less than or equal to 25 degrees C. However, at temperatures greater than or equal to 30 degrees C, there was significant volatilization (e.g., half-life of 20 days at 40 degrees C in unstirred solutions). This increased volatility reflected the rapid increase of the Henry's law constant with temperature. Additional experiments indicated that aeration of water significantly accelerated volatilization losses. Such air-stripping may be important in very turbulent streams and rivers and when water flows over hydraulic structures such as weirs. The experiments reported here indicate the importance that ecosystem-specific characteristics can have on the persistence of environmental contaminants.

引用

页码：605 / 620

页数：16

共 15 条

[1] Chang C.D., Armstrong D.W., Fleischmann T.J., J. Liq. Chromatogr, 17, pp. 19-32, (1994)
[2] Chesters G., Simsiman G.Y., Levy J., Alhajjar B.J., Fathulla R.N., Harkin J.M., Rev. Environ. Contain. Toxicol., JJLQ, pp. 1-74, (1989)
[3] Frank R., Logan L., Arch. Environ. Contam. Toxicol., 12, pp. 741-754, (1988)
[4] Hunter C., McGee B., Economics Information Report No. 94–01, (1994)
[5] Kent R.A., Pauli B.D., Trotter D.M., Gareau J., Department of the Environment, Inland Waters Directorate, Scientific Series, 184, (1991)
[6] Kochany J., Maguire R.J., J. Agric. Food Chem., 42, pp. 406-412, (1994)
[7] LeBaron H.M., McFarland J.E., Simoneaux B.J., Ebert E., Metolachlor, Herbicides: Chemistry, Degradation and Mode of Action, 3, pp. 335-382, (1988)
[8] Liu D., Maguire R.J., Pacepavicius G.J., Aoyama I., Environ. Toxicol. Water Qual. Inter. J., 10, (1995)
[9] Mackay D., Wolkoff A.W., Environ. Sci. Technol, 2, pp. 611-614, (1973)
[10] Maguire R.J., Tkacz R.J., Arch. Environ. Contam. Toxicol., 25, pp. 220-226, (1993)

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