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KMID : 1059520170610050238
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Journal of the Korean Chemical Society
2017 Volume.61 No. 5 p.238 ~ p.243
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Study on Adsorption of Pb and Cd in Water Using Carbonized Water Treatment Sludge
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Kim Youn-Jung
Kim Dae-Ik
Choi Jong-Ha
Hong Yong-Pyo
Ryoo Keon-Sang
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Abstract
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In this study, water treatment sludge carbonized with 400 oC was tested as an adsorbent for the removal of Pb and Cd in water. The carbonized sludge was characterized by thermo-gravimetric analysis (TGA), scanning electron microscopy (SEM), X-ray fluorescence spectrometry (XRF), and surface area analysis. Carbonized sludge exhibited much higher specific surface area and total pore volume than water treatment sludge itself. In batch-type adsorption process, carbonized sludge represented better adsorption performance for Pb than Cd, achieving 90~98% at the concentrations conducted in the experiments. Equilibrium data of adsorption were analyzed using the Freundlich and Langmuir isotherm models. It was seen that both Freundlich and Langmuir isotherms have correlation coefficient R2 value larger than 0.95. The results of studies indicated that carbonized water treatment sludge by heat treatment could be used as an efficient adsorbent for the removal of Pb and Cd from water.
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KEYWORD
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Carbonized water treatment sludge, Adsorption, Isotherm, Pb, Cd
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