A novel adsorbent obtained by caging activated carbon by konjac glucomannan gel for elimination of organic compounds |
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| Authors: | Yingjie Dai Hong Yan Binbin Zhang Wenting Wu Liqiong Yang Shufeng Li Wenbin Li Hongtao Li Lilong Yan Dexin Shan Yujie Feng Norifumi Terui Shunitz Tanaka |
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| Affiliation: | 1. Laboratory of Environmental Remediation, School of Resources Environment, Northeast Agricultural University, Harbin, China;2. State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, China;3. Key Laboratory of National Education Department, Soybean Research Institute, Northeast Agricultural University, Harbin, China;4. College of Chemistry and Environmental Engineering, Harbin University of Science and Technology, Key Laboratory of Green Chemical Technology of College of Heilongjiang Province, Harbin, China;5. School of Biology and Environment Engineering, Shenyang University, Shenyang, China;6. College of Life Science, Northeast Agricultural University, Harbin, China;7. Ichinoseki National College of Technology, Ichinoseki, Japan;8. Graduate School of Environmental Earth Science, Hokkaido University, Japan |
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| Abstract: | In this study, the adsorptive ability of the konjac glucomannan gel containing activated carbon (KGMG–AC) was investigated by measuring the removal of several organic compounds with different charges, such as nitrobenzene (NB), methylene blue (MB), and rose bengale (RB). The physical and chemical properties, adsorption dynamics, adsorption isotherms, and the effect of pH of the adsorbents were compared with those of a commercially available powdered activated carbon (AC). The results of the present study indicate that the removal ratio of NB, MB, and RB onto KGMG–AC was slightly higher than that of the AC. The adsorption equilibrium constant (KL) value (0.02 L/mg) of KGMG–AC for NB was similar to that of AC (0.03 L/mg). However, the saturated adsorption amount (Q0) of KGMG–AC (368 mg/g) for NB was slightly larger than that of AC (354 mg/g). The saturated adsorption amounts of MB and RB on KGMG–AC were 302 and 259 mg/g, respectively. On the other hand, a high molecular weight humic acid was not adsorbed by KGMG–AC. Thus, entrapping AC into KGMG resulted in the selective adsorption. Therefore, this study could show that KGMG–AC was a new environmental friendly adsorbent that can be easily prepared, used, and recovered in environments. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014 , 131, 40542. |
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| Keywords: | adsorption colloids kinetics |
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