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Vol. 25 No. 7 (2013): Vol 25 Issue 7

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Adsorption and Persistence of Ziram Fungicide in Allahabad Region Soils Influence by Organic Matter

https://doi.org/10.14233/ajchem.2013.13853
Ritesh Kumar Srivastava
Department of Chemistry, Sheila Dhar Institute of Soil Science, University of Allahabad, Allahabad-211 002, India
Brijesh K. Singh
Department of Chemistry, Moti Lal Nehru National Institute of Technology, Allahabad-211 004, India
Dinesh Mani
Department of Chemistry, Sheila Dhar Institute of Soil Science, University of Allahabad, Allahabad-211 002, India

Corresponding Author(s) : Dinesh Mani

dr.dinesh.au@gmail.com

Asian Journal of Chemistry, Vol. 25 No. 7 (2013): Vol 25 Issue 7

Abstract

The adsorption isotherms of Ziram obey the Freundlich equation (r2 > 0.99) very well. Adsorption of Ziram increases in following order, black > sandy loam > alluvial soil in untreated and farm yard manure treated soils. Adsorption isotherm was non linear with 1/nads values < 1. The product of the Freundlich adsorption constants (Kf) showed good correlation with the soil organic matter content which suggests that soil organic matter is the main controlling factor for Ziram adsorption. Cation exchange capacity, clay and pH content of the soil also affect the adsorption constants. The negative magnitude of Gibbs free energy (DG) indicates that the adsorption was exothermic and spontaneous process. The persistence of Ziram indicates a close correspondence to the (r2 > 0.97) first order exponential degradation kinetics and it is mainly influenced by soil organic matter. The half-life (T1/2) value of Ziram was observed to be highest for alluvial soil followed by sandy loam and black soils.

Keywords

Adsorption Persistence Ziram Fungicide Half-life Farm yard manure Organic matter
Kumar Srivastava, R., K. Singh, B., & Mani, D. (2013). Adsorption and Persistence of Ziram Fungicide in Allahabad Region Soils Influence by Organic Matter. Asian Journal of Chemistry, 25(7), 3947–3951. https://doi.org/10.14233/ajchem.2013.13853
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