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Adsorption Characteristics of Heavy Metals using Sesame Waste Biochar
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 Title & Authors
Adsorption Characteristics of Heavy Metals using Sesame Waste Biochar
Choi, Ik-Won; Seo, Dong-Cheol; Kang, Se-Won; Lee, Sang-Gyu; Seo, Young-Jin; Lim, Byung-Jin; Heo, Jong-Soo; Cho, Ju-Sik;
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 Abstract
Little research has been conducted to explore the heavy metal removal potential of biochar. The adsorption characteristics of heavy metals by sesame waste biochar (pyrolysis at for 1 hour) as heavy metal absorbent were investigated. The sesame waste biochar was characterized by SEM-EDS and FT-IR, and heavy metal removal was studied using Freundlich and Langmuir equations. The removal rates of heavy metals were higher in the order of Pb>Cu>Cd>Zn, showing that the adsorption efficiency of Pb was higher than those of any other heavy metals. Freundlich and Langmuir adsorption isotherms were used to model the equilibrium adsorption data obtained for adsorption of heavy metals on biochar produced from sesame waste. Pb, Cu, Cd and Zn equilibrium adsorption data were fitted well to the two models, but Pb gave a better fit to Langmuir model. Heavy metals were observed on the biochar surface after adsorption by scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS). Main functional groups were aromatic C
 Keywords
Biochar;Sesame waste;Heavy metals;Adsorption;
 Language
Korean
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