Dissipation and movement of acaricide chlorobenzilate in the environment

Ecotoxicol Environ Saf. 1994 Jul;28(2):193-200. doi: 10.1006/eesa.1994.1045.

Abstract

The dissipation of acaricide chlorobenzilate in selected soil and river water samples was studied. Under incubation conditions at 25 degrees C and 90% field capacity of moisture for 21 days, the residues of chlorobenzilate were 14 and 55% in Lukang silty clay loam and Pincheng clay, respectively. More than 80% of chlorobenzilate remained in the natural water (pH 7.2 and 7.3, respectively) and in the water adjusted to pH 5.0 when water samples collected from Green Lake and Wai-Shuang River near Taipei were treated with chlorobenzilate and then incubated for 34 days. But when the pH was adjusted to 9.0, only 60% was found in Green Lake water and 29% in Wai-Shuang River water. The dissipation of chlorobenzilate in the soil was fitted to first-order kinetics with half-lives of 5 to 36 days under various conditions in the laboratory experiments. No chlorobenzilate was detected in the leachate by a leaching experiment on the soil column for 18 days; most chlorobenzilate remained in the upper 3 cm of the column. According to assessment by the groundwater pollution-potential model (GWP), chlorobenzilate seemed to be safe in regard to groundwater contamination.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Benzilates / chemistry*
  • Chromatography, Gas
  • Humidity
  • Hydrogen-Ion Concentration
  • Insecticides / chemistry*
  • Kinetics
  • Soil / analysis
  • Soil Pollutants / analysis*
  • Taiwan
  • Temperature
  • Water Pollutants, Chemical / analysis*
  • Water Supply / analysis

Substances

  • Benzilates
  • Insecticides
  • Soil
  • Soil Pollutants
  • Water Pollutants, Chemical
  • chlorobenzilate