Kinetics and thermodynamics study of lead adsorption on to activated carbons from coconut and seed hull of the palm tree
Journal Title: International Journal of Environmental Science and Technology - Year 2007, Vol 4, Issue 1
Abstract
The kinetic and thermodynamic of the bath sorption of lead (Pb) on to activated carbon from Coconut (CA) and Seed hull of the Palm tree (GA) have been investigated. The effects of initial Pb concentration, contact time and temperature were examined. The results showed that the adsorption capacities of the activated carbons increased with the initial lead concentration. The process sorption followed a pseudo first order kinetics and parameters such as Ea and k0 were determined. It could be best fitted by the Langmuir and Freundlich isotherms. From the first, the equilibrium sorption capacities of lead ion were determined and found to be respectively 4.38 and 3.77 mg/g for CA and GA at 60 °C. The thermodynamic parameters such as ΔH, ΔS and ΔG were computed from the experimental data. These values show that the adsorption is endothermic and non spontaneous. Moreover, the relative weak values of ΔH (~5 kcal/mol) confirm a physical adsorption. The maximum adsorptions were obtained at 60 °C, pH 4 and with a Pb initial concentration of 100 mg/L.
Authors and Affiliations
S. Gueu, B. Yao, K. Adouby, G. Ado
Keywords
Related Articles
- EP ID EP118487
- DOI -
- Views 121
- Downloads 0
Effects of aeration rate and detention time on thermophilic aerobic digestion of mixed sludge and its dewaterability<br />
Thermophilic aerobic digestion (TAD) is a possible alternative for rapid sludge degradation and producing Class A biosolids. Aeration rate and detention time are two of the important parameters in TAD processes due to ra...
Application of an environmentally optimum cooling water system design to water and energy conservation
Recirculating cooling water systems are consist of a cooling tower and heat-exchanger network which conventionally have a parallel configuration. However, reuse of water between different cooling duties enables cooling...
Modeling study of the effects of the coagulation kernel with van der Waals forces and turbulence on the particle size distribution<br />
In this study, variations in the size distributions due to different assumptions for the coagulation kernel are investigated. In order to evaluate how the coagulation kernel influences the form of the particle size distr...
Evaluation of advanced rice germplasm under water stress environment
Thirteen genotypes of rice comprising of approved varieties and elite candidate lines were studied at three different water regimes by supplying 12, 8 and 4 numbers of irrigations at different intervals/ stages. The expe...
Computer simulated versus observed NO2 and SO2 emitted from elevated point source complex
ISC-AERMOD dispersion model was used to predict air dispersion plumes from an diesel power plant complex. Emissions of NO2 and SO2 from stacks (5 numbers) and a waste oil incinerator were studied to evaluate the pollutan...