| Title | Sustainable Co-Management of Acid Mine Drainage with Struvite Synthesis Effluent: Pragmatic Synergies in Circular Economy |
|---|---|
| ID_Doc | 5535 |
| Authors | Masindi, V; Mbhele, R; Foteinis, S |
| Title | Sustainable Co-Management of Acid Mine Drainage with Struvite Synthesis Effluent: Pragmatic Synergies in Circular Economy |
| Year | 2023 |
| Published | Environments, 10, 4 |
| Abstract | Herein, the alkaline supernatant of a struvite recovery system from municipal wastewater was successfully co-managed with acid mine drainage (AMD). Various ratios (v/v) of AMD to struvite supernatant were examined, and the quality of the passively co-treated effluent and of the generated sludge were examined using state-of-the-art analytical techniques including ICP-OES, FE-SEM/FIB/EDX, XRD, XRF, and FTIR. The optimum ratio was 1:9, where metals and sulphate were largely removed from AMD, i.e., from higher to lower score Fe (similar to 100%) >= Pb (similar to 100%) >= Ni (99.6%) >= Cu (96%) >= As (95%) >= Al (93.7%) >= Zn (92.7%) > Ca (90.5%) > Mn (90%) >= Cr (90%) > sulphate (88%) > Mg (85.7%), thus implying that opportunities for mineral recovery could be pursued. The pH of the final effluent was regulated to acceptable discharge levels, i.e., 6.5 instead of 2.2 (AMD) and 10.5 (struvite supernatant), while a notable reduction in the electrical conductivity further implied the attenuation of contaminants. Overall, results suggest the feasibility of the passive co-treatment of these wastewater matrices and that opportunities for direct scaling up exist (e.g., using waste stabilization ponds). Furthermore, apart from the initial recovery of struvite from municipal wastewater, metals could also be recovered from AMD and water could be reclaimed, therefore introducing circular economy and zero liquid discharge in wastewater treatment and management. |
| https://www.mdpi.com/2076-3298/10/4/60/pdf?version=1680588336 |
Similar Articles
| ID | Score | Article |
|---|---|---|
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) | |
| 16760
|
Akinwekomi, V; Maree, JP; Masindi, V; Zvinowanda, C; Osman, MS; Foteinis, S; Mpenyana-Monyatsi, L; Chatzisymeon, E Beneficiation of acid mine drainage (AMD): A viable option for the synthesis of goethite, hematite, magnetite, and gypsum - Gearing towards a circular economy concept(2020) | |
| 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) | |
| 3509
|
Mavhungu, A; Masindi, V; Foteinis, S; Mbaya, R; Tekere, M; Kortidis, I; Chatzisymeon, E Advocating circular economy in wastewater treatment: Struvite formation and drinking water reclamation from real municipal effluents(2020)Journal Of Environmental Chemical Engineering, 8, 4 | |
| 15675
|
Kotte-Hewa, DJ; Durce, D; Salah, S; Cánovas, CR; Smolders, E Remediation of acid mine drainage and immobilization of rare earth elements: Comparison between natural and residual alkaline materials(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) | |
| 22194
|
Vecino, X; Reig, M; López, J; Valderrama, C; Cortina, JL Valorisation options for Zn and Cu recovery from metal influenced acid mine waters through selective precipitation and ion-exchange processes: promotion of on-site/off-site management options(2021) | |
| 25376
|
Salehin, S; Rebosura, M; Keller, J; Gernjak, W; Donose, BC; Yuan, ZG; Pikaar, I Recovery of in-sewer dosed iron from digested sludge at downstream treatment plants and its reuse potential(2020) | |
| 15277
|
Nobahar, A; Melka, AB; Pusta, A; Lourenço, JP; Carlier, JD; Costa, MC A New Application of Solvent Extraction to Separate Copper from Extreme Acid Mine Drainage Producing Solutions for Electrochemical and Biological Recovery Processes(2022)Mine Water And The Environment, 41, 2 | |
| 23973
|
Lundquist, L; Baldwin, SA Novel Two-stage Biochemical Process for Hybrid Passive/Active Treatment of Mine-influenced Water(2022)Mine Water And The Environment, 41, 1 |