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The effect of cadmium (Cd) on adsorptiondesorption behavior of Simazine [2-chloro-4, 6 bis (ethylamine)-1,3,5-triazine] which is anionic herbicide were investigated at three different temperature 10, 25 and 40 ±1˚C on six agricultural soil samples which has different texture. The first order rate law was most fitted with the best correlation factor, the Linear, Freundlich and Langmuir models also were applied to describe the adsorption-desorption affinities to the soil samples. Values of adsorption rate constant k a were in the range 0.836 -1.818 h -1 while desorption rate constant k des were in the range 0.779 -1.376 h -1 . The activation energy E a * for adsorption processes followed the range 11.041-17.684 KJmol -1 . Values of equilibrium constant lnK o were in the range 0.048 -0.278. The standard free energy change ΔG o values were in the range -0.126 to -0.655 KJmol -1 . Values of the standard enthalpy change ΔH o followed the range -2.702 to -4.850 KJmol -1 . The value of standard entropy change ΔS o followed the range-7.557 to-14.965 Jmol -1 k -1 . The negative values revealed that the adsorption-desorption processes spontaneously, exothermic and physical in nature to some extent and chemical in others.
Rounak Shariff. 2013. "Effect of Cadmium ion on Adsorption-Desorption Behavior of Simazine on Agricultural Soils". Global Journal of Science Frontier Research, Global Journal of Science Frontier Research - B: Chemistry GJSFR-B Volume 13 (GJSFR Volume 13 Issue B6).
Crossref Journal DOI 10.17406/GJSFR
Print ISSN 0975-5896
e-ISSN 2249-4626
v1.2
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Total Score: 146
Country: Iraq
Subject: Global Journal of Science Frontier Research
Authors: Rounak M. Shariff, Media A. Hassan (PhD/Dr. count: 0)
View Count (all-time): 256
Total Views (Real + Logic): 1734
Total Downloads (simulated): 89
Publish Date: 2013 08, Fri
Monthly Totals (Real + Logic):
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