| Title | Optimisation of semi-upscaled polymer inclusion membrane (PIMs) based device for passive remediation of metal ions in acid mine drainage (AMD) |
|---|---|
| ID_Doc | 15136 |
| Authors | Maiphetlho, K; Netshiongolwe, K; Tutu, H; Chimuka, L; Richards, H |
| Title | Optimisation of semi-upscaled polymer inclusion membrane (PIMs) based device for passive remediation of metal ions in acid mine drainage (AMD) |
| Year | 2022 |
| Published | |
| Abstract | Acid mine drainage (AMD) has been a source of environmental contamination in many parts of the world. This is because many countries depend on mining as a source of revenue. However, waste tailing dumps often leach out toxic waste with high levels of metal ions and flow downstream to dams and rivers. The current remediation methods (passive and active) are expensive or ineffective for long-term use. In some cases, these methods generate solid slag waste as a major by-product. However, as part of the green and circular economy, waste materials are viewed as potential resources for raw materials. This work then reports on the design, laboratory optimisation and early-stage application of semi-pilot passive remediation device for the possible recovery of metal ions (cadmium, cobalt, copper, iron, and nickel) in AMD generated in the tailings pond. The sampling remediation device consisted of a polymer inclusion membrane composed of polyvinyl chloride and di-(2-eth-ylhexyl) phosphoric acid as a semi-penetrable barrier. The device had an upscaled chamber made of nylon with 1000 mL of the receiving solution. This developed passive remediation device was used in both synthetic and real AMD samples where a linear uptake of metals was demonstrated from day 6 to over a month with little influence of matrices. During deployment, the pH was increasing in the receiving solution and decreasing in the source solution of the linear region thus indicating the analytes facilitated transport. On day 35 of environmental application accumulated concentrations of target metal ions were Ni (63.42 mg L-1), Cd (47.48 mg L-1), Co (57.34 mg L-1), and Cu (49.86 mg L-1). Further, the characterisation results showed no signs of membrane degradation in this period. This highlights that the PIMs are a promising future for passive remediation and/or recovery of metal ions in mine wastewater before contamination of rivers and dams downstream. |
Similar Articles
| ID | Score | Article |
|---|---|---|
9369
|
Baena-Moreno, FM; Rodríguez-Galán, M; Arroyo-Torralvo, F; Vilches, LF Low-Energy Method for Water-Mineral Recovery from Acid Mine Drainage Based on Membrane Technology: Evaluation of Inorganic Salts as Draw Solutions(2020)Environmental Science & Technology, 54.0, 17 | |
| 15128
|
Sanchez-Ramos, D; Garrido, FJLB; Hernández, IA; Romero, LR; Camacho, JV; Fernández-Morales, FJ Sustainable use of wastes as reactive material in permeable reactive barrier for remediation of acid mine drainage: Batch and continuous studies(2023) | |
| 27339
|
López, J; Gibert, O; Cortina, JL Integration of membrane technologies to enhance the sustainability in the treatment of metal-containing acidic liquid wastes. An overview(2021) | |
| 21527
|
Lopez, J; Gibert, O; Cortina, JL Evaluation of an extreme acid-resistant sulphonamide based nanofiltration membrane for the valorisation of copper acidic effluents(2021) | |
| 27016
|
Moreira, VR; Torres, EA; Balarini, JC; Amaral, MCS Rethinking gold mining wastewater treatment with an integrated process of membrane distillation and membrane contactors for minimal waste discard and resource recovery(2023) | |
| 28997
|
Masindi, V; Foteinis, S; Renforth, P; Ndiritu, J; Maree, JP; Tekere, M; Chatzisymeon, E Challenges and avenues for acid mine drainage treatment, beneficiation, and valorisation in circular economy: A review(2022) | |
| 13622
|
Masindi, V; Shabalala, A; Foteinis, S Passive co-treatment of phosphorus-depleted municipal wastewater with acid mine drainage: Towards sustainable wastewater management systems(2022) |