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Received September 2, 2020
Accepted November 16, 2020
articles This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
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Application of polyethylenimine multi-coated adsorbent for Pd(II) recovery from acidic aqueous solution: batch and fixed-bed column studies

1Department of Ocean System Engineering, Gyeongsang National University, 2 Tongyeonghaean-ro, Tongyeong, Gyeongnam 53064, Korea 2Department of Marine Environmental Engineering, Gyeongsang National University, 2 Tongyeonghaean-ro, Tongyeong, Gyeongnam 53064, Korea
sungukw@gmail.com
Korean Journal of Chemical Engineering, March 2021, 38(3), 523-530(8), 10.1007/s11814-020-0716-x
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Abstract

PEI multi-coated PSBF (PEI-M-PSBF) with high adsorption efficiency and good reusability for Pd(II) recovery was prepared by a PEI multi-coating method. The results of FT-IR and FE-SEM showed that the PEI-M-PSBF was successfully prepared. Batch experiments were conducted to study the adsorption/desorption performance of PEIM-PSBF to Pd(II). The Langmuir and pseudo-second-order models were well suited for the batch experiment isotherm and kinetic data, respectively. The adsorption capacity of Pd(II) by Langmuir model was 327.14mg/g, and the initial adsorption rate of 3-PEI-PSBF was 37.19mg/g min. As a result, the increase in amine groups on the PEI-MPSBF surface through the PEI multi-coating directly influenced the adsorption amount of the biosorbent. The effects of initial concentration, bed column depth, and flow rate were determined in a column system and the breakthrough curves were detected by Thomas model. In addition, the recycle of the adsorbent was examined by multiple time performing adsorption/desorption cycles up to ten times in a fixed-bed column.

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