The Malaysian Journal of Analytical Sciences, Vol 12 No 2 (2008): 341 - 347

 

 

 

 

ADSORPTION OF CHLORIMURON ETHYL AND METSULFURON METHYL ON SELECTED SELANGOR AGRICULTURAL SOILS

 

Norhayati Mohd Tahir*, Tay Joo Hui, Marinah Mohd Ariffin, Suhaimi Suratman

and Tiung Swee Khoon

 

Environmental Research Group (ERG), Department of Chemical Sciences,

Faculty of Science and Technology, Universiti Malaysia Terengganu (UMT)

,Mengabang Telipot, 21030 Kuala Terengganu, Terengganu.

 

*Corresponding author: hayati@umt.edu.my

 

Abstract

The adsorption of chlorimuron-ethyl and metsulfuron-methyl herbicide in four types of soil samples taken from an oil palm estate in Selangor has been investigated at two different depths (0-10cm and 20-30cm) using a batch technique. The adsorption behaviour of both herbicides was evaluated using Freundlich and linear adsorption isotherms. Results indicate that soils from KLG 3 and KLG 4 stations exhibited significant stronger adsorption affinity for both herbicides (p<0.05). The adsorption affinity of chlorimuron-ethyl is stronger than metsulfuron-methyl in all soils studied and the adsorption affinity decreased with soil depth. Comparison of the soil physicochemical properties revealed that the organic matter content of KLG 3 and KLG 4 soils are significantly different from other soils although their pH values were similar. In agreement with previously reported studies, organic matter content and pH exert a dominant role in controlling the adsorption of sulfonylurea herbicides in the four soils studied. Thus it could be concluded that the varying adsorption coefficient values observed in the present study could be attributed to the differences in soil properties.

 

Keywords: adsorption; chlorimuron-ethyl; metsulfuron-methyl; soils; sulfonylurea herbicides

 

Rererences

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