alexa Adsorption and Desorption Behavior of Chlorotriazine He
ISSN:2157-7463

Journal of Petroleum & Environmental Biotechnology
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Research Article

Adsorption and Desorption Behavior of Chlorotriazine Herbicides in the Agricultural Soils

Anil Kumar Singh and Swaranjit Singh Cameotra*
Institute of Microbial Technology, Sector 39 a, Chandigarh 160036, India
Corresponding Author : Swaranjit Singh Cameotra
Institute of Microbial Technology
Sector 39 A, Chandigarh 160036, India
Tel: 0172-6665233
Fax: 0172-2690632/585
E-mail: [email protected]
Received August 12, 2013; Accepted September 18, 2013; Published September 25, 2013
Citation: Anil Kumar S, Swaranjit Singh C (2013) Adsorption and Desorption Behavior of Chlorotriazine Herbicides in the Agricultural Soils. J Phylogenetics Evol Biol 4:154. doi:10.4172/2157-7463.1000154
Copyright: © 2013 Anil Kumar S, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
 

Abstract

The chlorotriazine herbicides have been applied worldwide for controlling of broadleaf weeds. These herbicides are known carcinogen and thus, their occurrence in surface and ground water is a cause of concern. In the present study, adsorption–desorption behavior of chlorotriazine herbicides namely simazine and atrazine was investigated. For the study, two different types of agricultural soil A (loam, 13.7% organic matter content) and soil B (clay-loam, 4.8% organic matter content) was collected from Punjab, India. The adsorption–desorption study was carried out by batch equilibration procedure. The data fitted well into the Freundlich equation. The adsorption Kf values indicated that the simazine has more soil adsorption ability than atrazine. The extent of herbicides adsorbed to the soil was more under low pH conditions and decreased with the increase in pH value. Increase in temperature decreased herbicides adsorption ability for both the soil types. The Gibb’s free energy (ΔG) values were found less negative with the increase in temperature. Atrazine exhibited better desorption behavior than simazine. Soil A with high organic matter content exhibited sorption–desorption hysteresis. The results indicate that the soil organic matter content and aqueous solubility play an important role in the adsorption–desorption behavior of chlorotriazine herbicides. The present understanding of chlorotriazine herbicides sorption–desorption process will help to determine the herbicides fate and availability in soil, biodegradation, runoff and leaching.

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