| Issue |
MATEC Web Conf.
Volume 333, 2021
The 18th Asian Pacific Confederation of Chemical Engineering Congress (APCChE 2019)
|
|
|---|---|---|
| Article Number | 04004 | |
| Number of page(s) | 4 | |
| Section | Separation Processes | |
| DOI | https://doi.org/10.1051/matecconf/202133304004 | |
| Published online | 08 January 2021 | |
Reductive Adsorption of Chromium(VI) with Activated Carbon
1
Department of Chemical Engineering, The University of Kitakyushu, Hibikino 1-1, Kitakyushu 808-0135, Japan
2
Department of Environmental Engineering, Chung Yuan Christian University, 200 Chung Pei Road, Chung Li District, Taoyuan City, Taiwan 32023, R.O.C.
* Corresponding author: nishihama@kitakyu-u.ac.jp
Reductive adsorption of chromium (Cr) has been investigated, employing coal-based activated carbon with batchwise study. The adsorption was carried out by varying parameters such as pH of the aqueous solution and contact time. Cr(III) was hardly adsorbed on activated carbon, and it was precipitated at high pH region. High adsorption amounts of Cr(VI) was obtained at pH range 4.5 – 5.5. In the adsorption process, reduction of Cr(VI) to Cr(III) was occurred at especially acidic pH region, and thus most of Cr remained in the aqueous solution in this pH region was Cr(III).
© The Authors, published by EDP Sciences, 2021
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