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- W2614123319 abstract "Untreated Sennaalata (USA) and chemically modified Sennaalata (CAMSA) were evaluated for their effectiveness in the removal of Cu2+ from aqueous solution. USA was modified with citric acid and characterized by SEM and FTIR. The parameters determined included pH, point of zero charge and initial concentration. Batched equilibrium, kinetic and thermodynamic experiments were also carried out at 298K and at pH 5. The kinetic data obtained were analyzed using pseudo-first order and pseudo-second order models. The pseudo- second order model was better for describing the adsorption of both USA and CAMSA. The equilibrium data were analyzed using Langmuir, Freundlich and Temkin isotherms. The Sorption isotherm was well fitted to Langmuir for both USA and CAMSA. The maximum monolayer adsorption capacities were 2.44 and 23.8 mg/g for USA and CAMSA respectively. In addition, the specific surface area of CAMSA (3.56m2/g) was higher than that of USA (0.365 m2/g). Thus CAMSA removed more Cu2+ than USA. Effect of temperature revealed that the reaction was endothermic and the sorption process was physisorption for both USA and CAMSA." @default.
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- W2614123319 date "2017-01-01" @default.
- W2614123319 modified "2023-09-28" @default.
- W2614123319 title "Copper Biosorption by Untreated and Citric Acid Modified Senna alata Leaf Biomass in a Batch System: Kinetics, Equilibrium and Thermodynamics Studies" @default.
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