期刊
JOURNAL OF ENVIRONMENTAL MANAGEMENT
卷 204, 期 -, 页码 200-206出版社
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jenvman.2017.08.047
关键词
Palladium; Recovery; Adsorbent; Reusability
资金
- National Research Foundation of Korea (NRF) - Ministry of Science, ICT & Future Planning [NRF-2017R1A1A1A05000741]
- National Research Foundation of Korea [31Z20130012972] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
In this study, a mixture of polyethylenimine (PEI) and polyvinyl chloride (PVC) was reacted at 80 degrees C for 6 h to synthesize crosslinked PEI/PVC polymer solution, which was injected to produce the PEI/PVC-crosslinked fiber (PEI/PVC-CF). PEI/PVC-CF was investigated as an adsorbent to remove and recover Pd(II) from acidic solutions. In order to examine the adsorption characteristics and usability of PEI/PVC-CF for Pd(II) recycling, several experiments such as isotherm, kinetics, desorption and reuse were conducted. The adsorption isotherms were fitted using the Langmuir and Freundlich models, respectively. The maximum adsorption capacity was estimated as 146.03 mg/g according to the Langmuir model. The kinetic experiments demonstrated that adsorbent reaches adsorption equilibrium within 60 min for initial Pd(II) concentrations of 25-100 mg/L. After adsorption, Pd(II) on PEI/PVC-CF was easily desorbed using acidified thiourea solution, and the desorption efficiency increased with the thiourea concentration. It was also demonstrated that PEI/PVC-CF can be used repeatedly for at least five cycles without reduction in adsorption capacity. (C) 2017 Elsevier Ltd. All rights reserved.
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