—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.
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:
Zahra Shokria is with University of Jiroft, Iran, Islamic (e-mail:
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.