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Removal of Thiram from Aqueous Solutions
Author(s) -
Zahoor Muhammad
Publication year - 2010
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.201000201
Subject(s) - chemistry , adsorption , aqueous solution , endothermic process , thiram , freundlich equation , diffusion , langmuir , kinetics , thermodynamics , kinetic energy , activated carbon , physics , quantum mechanics , pesticide , agronomy , biology
In this study activated carbon was used for the removal of thiram from aqueous solutions. Adsorption experiments were carried out as a function of time, initial thiram concentration and temperature. Equilibrium data fitted well to the Freundlich and Langmuir equilibrium models in the studied concentration range. Adsorption kinetics followed a pseudo second‐order kinetic model rather than pseudo first‐order model. The results from kinetic experiments were used to describe the adsorption mechanism. Both boundary layer and intraparticle diffusion played important role in the adsorption mechanism of thiram. Thermodynamic parameters (Δ G 0 , Δ H 0 , and Δ S 0 ) were determined and the adsorption process was found to be an endothermic one. The negative values of ΔG 0 at different temperatures were indicative of the spontaneity of the adsorption process.