Palladium Recovery through Membrane Capacitive Deionization from Metal Plating Wastewater
- Authors
- Kim, David Inhyuk; Gwak, Gimun; Dorji, Pema; He, Di; Phuntsho, Sherub; Hong, Seungkwan; Shon, Hokyong
- Issue Date
- 2월-2018
- Publisher
- AMER CHEMICAL SOC
- Keywords
- Membrane capacitive deionization (MCDI); Electrosorption; Palladium concentration; Ion desorption; Wastewater from plating industry
- Citation
- ACS SUSTAINABLE CHEMISTRY & ENGINEERING, v.6, no.2, pp.1692 - 1701
- Indexed
- SCIE
SCOPUS
- Journal Title
- ACS SUSTAINABLE CHEMISTRY & ENGINEERING
- Volume
- 6
- Number
- 2
- Start Page
- 1692
- End Page
- 1701
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/77823
- DOI
- 10.1021/acssuschemeng.7b02923
- ISSN
- 2168-0485
- Abstract
- The potential application of membrane capacitive deionization (MCDI) for recovery of palladium (Pd) ions from catalyst solution wastewater generated from the plating industry was investigated in this study. Several major issues were explored in this work to verify the suitability of MCDI for Pd recovery from a practical perspective: adsorption and desorption efficiencies, desorption mechanisms into high concentration of Pd concentrate, and its sustainability in long-term operation. The lab-scale MCDI operation achieved satisfactory and highly competitive Pd removal (99.07-99.94% removal with 1.42-1.52 of Pd selectivity over ammonium ions) showing that Pd can be effectively collected from plating industry wastewater. A high concentration of Pd concentrate (64.77 and 919.44 mg/L of Pd from the 10 and 100 mg/L Pd containing catalyst solution, respectively) was obtained through successive five operation cycles of adsorption/desorption phases. However, it is significant to note that the desorption efficiency was inversely proportional to the concentration of Pd concentrate which is likely due to the Pd ions discharged from carbon electrode toward Pd solution against the enhanced concentration gradient. The long-term operation results suggest that scaling could reduce the MCDI efficiency during Pd recovery (0.17% decrease in Pd removal for every cycle on average) and hence may require an adequate electrode cleaning regime.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - College of Engineering > School of Civil, Environmental and Architectural Engineering > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.