Kinetic and isotherm studies of copper (II) removal from wastewater using various adsorbents | دراسات حركيه وحرارية لإزالة أيون النحاس من مياه الصرف باستخدام عدة مدمصات

The present investigation deals with the utilization of marine green algae (GA), Ulva lactuca, and an activated carbon prepared from green algae (CGA) as adsorbents for the removal of copper from wastewater. A series of experiments were conducted in a batch system to evaluate the effect of system variables. The effect of pH, initial copper concentration, dose of adsorbents were considered. The optimal pH value of copper (II) adsorption onto GA and CGA was found to be pH 5.0. The maximum uptake capacities were 24.5 and 32.3 mg copper (II) per gram of GA and CGA, respectively. The efficiency of removal was slightly changed by replacing an aqueous solution by saline water or wastewater containing the same copper concentration. Adsorption kinetic data were tested using pseudo-first order, pseudo-second order, Bangham's equation and intra-particle diffusion models. Kinetic studies showed that the adsorption followed a pseudo-second order reaction. Studies revealed that intra-particle diffusion played an important role in the mechanism of copper (II) adsorption. The equilibrium data were analyzed using Langmuir, Freundlich, Tempkin, Dubinin-Radushkevich, Redlich-Peterson and Koble-Corrigan isotherm models at different doses of GA and CGA. The equilibrium data were analysed using different error analysis equations. The Freundlich and Redlich-Peterson models were found to be describing the data of GA, while Freundlich model describes the data of CGA.

National Institute of Oceanography and Fisheries (NIOF), Egypt

The Egyptian Journal of Aquatic Research is abstracted in both of Zoological Record and Chemical Abstract since Volume 31(1), 2005. The Chief Editor: Prof. Fatma Aly Abd El-Razek E-mail: [email protected]

Published

Ulva lactuca, activated carbon, isotherm studies