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KMID : 1024520140230081419
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Journal of the Environmental Sciences
2014 Volume.23 No. 8 p.1419 ~ p.1428
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Heavy Metal Removal of Acrylic Acid-grafted Bacterial Cellulose in Aqueous Solution
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Ahn Yeong-Hee
Choi Yong-Jin
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Abstract
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Electron beam-induced grafting polymerization was employed to prepare Acrylic acid-grafted bacterial cellulose
(BC-g-AAc). BC-g-AAc as an adsorbent was applied to remove heavy metals (e.g., As, Pb, and Cd). This study
examined followings; morphological change of surface, adsorptive behavior of BC-g-AAc, and interpretation of
adsorptive kinetics. Specific surface areas of BC and BC-g-AAc were 0.9527 m2g-1 for BC and 0.2272 m2
g-1 forBC-g-AAc, respectively as measured by BET nitrogen adsorption, revealing the morphological change of the surfaceof BC-g-AAc. Batch adsorption test was performed to investigate adsorptive behavior of BC-g-AAc in aqueous
solution. The amounts of Pb and Cd adsorbed on BC-g-AAc were 69 mg g-1 and 56 mg g-1, respectively. However, As
was not adsorbed on BC-g-AAc due to its neutral nature. Both the Benaissa model and the Kurniawan model were
applied in the study to interpret adsorptive kinetics. From the value of correction coefficient (R2
), adsorptive kinetics of Pb and Cd were subjected to Kurniawan model referred to pseudo-second-order. Taken together, the results of this study show that BC-g-AAc has potential as a heavy metal (eg., Pb, Cd)-adsorbent made of an environmentally friendly
material.
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KEYWORD
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Electron beam-induced grafting polymerization, Bacterial cellulose, Heavy metal, Adsorbent, Adsorptive kinetic
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