Adsorption of Cadmium, Copper, and Lead on Sphagnum Peat Moss

Sunbaek Bang; Sang-Woo Lee; Ju-Yong Kim; Dong Il Yu; Yong Kon Kang; Kyoung-Woong Kim

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Econ. Environ. Geol. 2006; 39(2): 103-109

Published online April 30, 2006

Adsorption of Cadmium, Copper, and Lead on Sphagnum Peat Moss

Sunbaek Bang¹, Sang-Woo Lee², Ju-Yong Kim¹, Dong Il Yu³, Yong Kon Kang⁴ and Kyoung-Woong Kim^1*

Author Info. +

¹Department of Environmental Science and Engineering, Gwangju Institute of Science and Technology, Gwangju 500-712, Korea
²Environmental Engineering Section, Division of Biotechnology, The Catholic University of Korea, Gyonggi 420-743, Korea
³Miraeentek. Co. Inc., Seongnam 461-822, Korea
⁴Ohsung NH. Co. Inc., Busan 604-817, Korea

Correspondence to :

Kyoung-Woong Kim

kwkim@gist.ac.kr

Received: January 25, 2006; Accepted: March 22, 2006

Abstract

Batch adsorption experiments were performed to adsorb cadmium [Cd(II)], copper [Cu(II)], and lead [Pb(II)] onto sphagnum peat moss. According to the results, 10-50 mg/L of Cd(II), Cu(II), and Pb(II) were effectively adsorbed and removed within 1 h by 1.0 g/L of sphagnum peat moss. The amounts of Cd(II), Cu(II), and Pb(II) adsorbed on sphagnum peat moss increased with increasing the initial concentrations. The kinetics for the adsorption of Cd(II), Cu(II), and Pb(II) on sphagnum peat moss was described well using the pseudo-second order model at different initial concentrations. The maximum adsorption capacities calculated from the Langmuir isotherm for Cd(II), Cu(II), and Pb(III) were 33.90, 29.15, and 91.74 mg/g, respectively. Experimental results showed that sphagnum peat moss was a very effective adsorbent on the adsorption of Cd(II), Cu(II), and Pb(II).

Keywords cadmium, copper, lead, peat moss, adsorption, Langmuir isotherm