Application of volume retarded osmosis – Low pressure membrane hybrid process for recovery of heavy metals in acid mine drainage
- Authors
- Choi, J.[Choi, J.]; Im, S.-J.[Im, S.-J.]; Jang, A.[Jang, A.]
- Issue Date
- Oct-2019
- Publisher
- Elsevier Ltd
- Keywords
- Acid mine drainage treatment; Forward osmosis; Low pressure membrane process; Recovery heavy metals; Volume retarded osmosis
- Citation
- Chemosphere, v.232, pp.264 - 272
- Indexed
- SCIE
SCOPUS
- Journal Title
- Chemosphere
- Volume
- 232
- Start Page
- 264
- End Page
- 272
- URI
- https://scholarworks.bwise.kr/skku/handle/2021.sw.skku/15281
- DOI
- 10.1016/j.chemosphere.2019.05.209
- ISSN
- 0045-6535
- Abstract
- Recovery of heavy metals in acid mine drainage (AMD) such as Mn, Fe, Cu, Zn, As, Cd and Pb was evaluated using volume retarded osmosis and low-pressure membrane (VRO-LPM) process. In VRO-LPM process, the draw solution (DS) is regenerated by the naturally generated pressure, giving its economic value. Ethylenediaminetetraacetic acid tetrasodium salt (EDTA-4Na) and Poly (sodium-4-styrenesulfonate, PSS-Na) were used and compared to determine more suitable DS in heavy metal recovery from the AMD. Forward osmosis (FO) and nanofiltration (NF) membrane were employed in VRO-LPM process, due to the low EDTA-4Na rejection (about 50%) in ultrafiltration (UF) process. For the FO part in the VRO-LPM process, PSS-Na had flux values of 0.12, 0.11 and 0.05 L m−2 h−1 and at osmotic pressure of 8.9, 12 and 13 bar, respectively. Unlike the flux values, the RSF of PSS remained at 0.01 mmol h−1 at all osmotic pressures. For EDTA-4Na, the flux values were 0.10, 0.06 and 0.04 L m−2 h−1, which are relatively higher than those of PSS-Na; and the RSF values were 0.1, 1.2, 2.2 mmol h−1, which are higher compared to those of PSS-Na. Unlike PSS-Na, RSF for EDTA-4Na increased as the concentration increases. In the NF part of the VRO-LPM process, PSS-Na had higher water flux and rejection than EDTA-4Na, and the flux and rejection both decreased with concentration for both PSS-Na and EDTA-4Na. The overall rejection in VRO-LPM process was over 95% for all heavy metal ions. Therefore, VRO-LPM process has proven its ability to be used in AMD treatment for heavy metal removal. © 2019 Elsevier Ltd
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Collections - Graduate School of Water Resources > Department of Water Resources > 1. Journal Articles
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