Adsorption-desorption behaviour of chlorimuron-ethyl herbicide on homoionic clays

Authors : Archana SUYAL, Shailendra S CHAUHAN, Anjana SRİVASTAVA, Pc SRİVASTAVA

Pages : 28-34

View : 43 | Download : 16

Publication Date : 2013-03-01

Article Type : Research Paper

Abstract :Laboratory studies were conducted to determine the adsorption-desorption behaviour of Chlorimuron-ethyl herbicide on three homoionic clays insert ignore into journalissuearticles values(Kaolinite insert ignore into journalissuearticles values(K);, Mica insert ignore into journalissuearticles values(M); and Bentonite insert ignore into journalissuearticles values(B););, which are found in Indian soils. The adsorption- desorption data of chlorimuron-ethyl fitted well to Freundlich adsorption- desorption isotherm model insert ignore into journalissuearticles values(R² = 0.755 to 0.986);. The computed valued of log K and 1/n varied from 4.0199 insert ignore into journalissuearticles values(B-Cu); to 4.1144 insert ignore into journalissuearticles values(B-Ca); and from 0.4458 insert ignore into journalissuearticles values(M-Cu); to 0.7894 insert ignore into journalissuearticles values(K-Ca); respectively. Desorption data of chlorimuron-ethyl were also fitted to Freundlich model and the values of log K` and 1/n` ranged from 4.2727 insert ignore into journalissuearticles values(K-Ca); to 4.2933 insert ignore into journalissuearticles values(M-Ca); and from 0.0006 insert ignore into journalissuearticles values(B-Cu); to 0.0033 insert ignore into journalissuearticles values(B-Ca);, respectively. Higher values of desorption index n`/n indicated poor reversibility of chlorimuron ethyl by soil clays. 
Keywords : Adsorption desorption, Chlorimuron ethyl, Kaolinite, Bentonite, Mica

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