International Journal of Environmental Science and Development

Abstract—In this study, the magnetic bentonite absorbent modified by 2-(3,4-dihydroxyphenyl)-1,3-dithiolane, was synthesized for simultaneous removal of two toxic heavy metals of cadmium and copper from soil and water samples. The influences of five dominant parameters of pH, temperature, time and adsorbent amount on adsorption process were investigated. Via experiments, maximum adsorption percent of 98.5 ± 0.5 and 98.1± 0.4 were obtained which showed the high adsorption potential of the proposed sorbent. The experimental data were found to be properly fitted to the Langmuir and Freundlich model which indicates that the sorption takes place on a heterogeneous material. The sorption capacities of 175.439 and 178.571(mg g-1) were achieved for cadmium and copper, respectively. Standard Error Estimates of 0.253 and 0.299 for Cu and Cd, respectively, showed the fittest adsorption data after using this model. Also, Freundlich isotherm and Freundlich isotherm- linear plots were satisfactorily able to describe the adsorption of copper and cadmium by both adsorbents: N-bentonite and modified bentonite.

Index Terms—2-(3,4-dihydroxyphenyl)-1, 3-dithiolane, adsorption, magnetic organo-bentonite, heavy metal, flame atomic absorption spectrometry (FAAS).

Naser Boroumand is with the Department of Soil Science, Faculty of Agriculture, University of Jiroft, Jiroft, P. O. Box 8767161167, Iran (e-mail: nboroomand.uj@gmail.com).
Zahra Shokria is with University of Jiroft, Iran, Islamic (e-mail: Shokri@yahoo.com).

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Cite: Naser Boroomand and Zahra Shokria, "Adsorption of Cadmium (II) and Copper (II) onto Magnetic Organo-Bentonite Modified by 2-(3,4-Dihydroxyphenyl)-1, 3-Dithiolane from Aqueous Solutions," International Journal of Environmental Science and Development vol. 8, no. 2, pp. 88-92, 2017.