Removal of Copper from Aqueous Solution using Tunisian Clay | Science Publications

American Journal of Environmental Sciences

J. Bouzid¹  Z. Elouear¹  S. Gharab¹  N. Boujelben¹  F. Bouhamed¹ 

关键词: Copper;    Adsorption;    Clay;    Isotherms;   

DOI  :  10.3844/ajessp.2015.90.98

学科分类：环境科学（综合）

来源: Science Publications

【 摘 要 】

Natural adsorbents such as clay was used toreplace expensive imported synthetic adsorbents. In this study, ScanningElectron Microscopy (SEM), Infrared spectroscopy and X-ray diffractiontechniques were used to characterize the used sorbent (clays C). Batchexperiments were performed to evaluate the effects of contact time, solution pHand temperature on copper removal onto used sorbent from aqueous solution.Equilibrium data were analyzed using Langmuir and Freundlich isotherm models tocalculate isotherm constants. Kinetic studies showed that an equilibrium timeof 1 h was required for the adsorption of Cu(II) onto Tunisian clay.Equilibrium adsorption is affected by the initial pH of the solution. The maximumadsorption capacity was obtained at pH 5. Adsorption tests in syntheticwastewater revealed that the adsorption data of this material for copper ionswere better fit to the Langmuir isotherm based on correlation coefficients. Theinfluence of temperature on the adsorption process was also evaluated. Resultsindicated that adsorption of Cu(II) on the sorbents is endothermic. Thethermodynamic parameters (ΔG°,ΔH° and ΔS°) for Cu(II) sorption were also determined from the temperaturedependence. Results of this study suggest that used Tunisian clay may be apromising adsorbents for environmental remediation.

【 授权许可】

Unknown