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Recovery of Gold from Electroplating Waste Water Effluents by using Orange Peel

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dc.contributor.author ASIM HAFEEZ
dc.contributor.author USMAN ALI
dc.contributor.author MUHAMMAD ALI KHAN
dc.date.accessioned 2023-10-03T04:03:29Z
dc.date.available 2023-10-03T04:03:29Z
dc.date.issued 2010-12-09
dc.identifier.citation KHAN, M. A., Ali, U., & HAFEEZ, A. (2010). Recovery of gold from electroplating waste water effluents by using orange peel. Journal of the Chemical Society of Pakistan, 32(6), 753. en_US
dc.identifier.issn 0253-5106
dc.identifier.uri http://142.54.178.187:9060/xmlui/handle/123456789/19755
dc.description.abstract A method for the recovery of gold from the electroplating waste water effluents has been developed based on its adsorption on orange peel. Adsorption of gold(III) from dilute solutions of hydrochloric acid on orange peel has been studied under various experimental conditions by using batch technique. Distribution coefficients, Kd and % extraction were determined for the orange peel-gold solution system as a function of contact time, pH, sorbent, sorbate concentrations and temperature. The uptake of gold by raw orange peel is time, pH, initial metal concentration, sorbate dose, and temperature dependent. Adsorption data have been interpreted in terms of Langmuir and the Freundlich equations. Thermodynamic parameters for adsorption of gold on raw orange peel have been determined at three different temperatures. The positive value of heat of adsorption; ΔH° = 61.85 kJ/mol shows that the adsorption of gold on orange peel is endothermic whereas the negative value of ΔG° = -35.85 kJ/mol at 308 K shows the spontaneity of the process. ΔG° becomes more negative with increase in temperature which shows that the adsorption is more favorable at higher temperatures. Under the optimal adsorption conditions the adsorption capacity of gold is 5.79 mg/g of the raw orange peel out of which 5.37 mg of gold gets desorbed with 0.1 % thiourea solution. en_US
dc.description.sponsorship The chemical society of Pakistan is an approved society from the PSF. en_US
dc.language.iso en en_US
dc.publisher Karachi: The Chemical Society of Pakistan en_US
dc.title Recovery of Gold from Electroplating Waste Water Effluents by using Orange Peel en_US
dc.type Article en_US


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