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Adsorption of Zinc Metal from Paper Mills Wastewater by Activated Carbon Prepared from Shorea robusta Leaf Litter


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1 Department of Chemical Engineering, GMR Institute of Technology, Rajam-532 127 Dist. Srikakulam, Andhra Pradesh, India
 

In this paper, a study of removal efficiency of zinc from a simulated Paper Mills Effluent by adsorption on a non-convectional material, activated carbon from Shorea robusta leaf litter, is presented. AS the adsorption potential of activated carbon varies as a function of contact time, initial metal concentration in the aqueous solution, temperature of solution, particle size of the adsorbent used, pH of solution, flow rate and the chemical and physical characteristics of the activated carbon and the wastewater, the chemical and physical properties of the activated carbon have been carried out.

The controlling efficiency of the adsorption of zinc is affected by aqueous solution pH, contact time, adsorbent dose and initial metal ion concentration, which are investigated for the batch process. Results of the investigation were used for the kinetic studies to understand the mechanism of the adsorption process. The adsorption equilibrium is well correlated by Langmuir and Freundlich isotherms. From the experimental results it was found that the optimum activated carbon dose is 2.8 g/L. At this optimum carbon dose, by varying the contact time, it was found that the equilibrium occurs at one hour of operation and maximum adsorption (83.23%) at high values of solution pH (9.0) and high initial metal ion concentration.


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  • Adsorption of Zinc Metal from Paper Mills Wastewater by Activated Carbon Prepared from Shorea robusta Leaf Litter

Abstract Views: 225  |  PDF Views: 2

Authors

S. N. Dash
Department of Chemical Engineering, GMR Institute of Technology, Rajam-532 127 Dist. Srikakulam, Andhra Pradesh, India
P. Satya Sagar
Department of Chemical Engineering, GMR Institute of Technology, Rajam-532 127 Dist. Srikakulam, Andhra Pradesh, India

Abstract


In this paper, a study of removal efficiency of zinc from a simulated Paper Mills Effluent by adsorption on a non-convectional material, activated carbon from Shorea robusta leaf litter, is presented. AS the adsorption potential of activated carbon varies as a function of contact time, initial metal concentration in the aqueous solution, temperature of solution, particle size of the adsorbent used, pH of solution, flow rate and the chemical and physical characteristics of the activated carbon and the wastewater, the chemical and physical properties of the activated carbon have been carried out.

The controlling efficiency of the adsorption of zinc is affected by aqueous solution pH, contact time, adsorbent dose and initial metal ion concentration, which are investigated for the batch process. Results of the investigation were used for the kinetic studies to understand the mechanism of the adsorption process. The adsorption equilibrium is well correlated by Langmuir and Freundlich isotherms. From the experimental results it was found that the optimum activated carbon dose is 2.8 g/L. At this optimum carbon dose, by varying the contact time, it was found that the equilibrium occurs at one hour of operation and maximum adsorption (83.23%) at high values of solution pH (9.0) and high initial metal ion concentration.