Recovery of drinking water and valuable minerals from acid mine drainage using an integration of magnesite, lime, soda ash, CO(sub)2 and reverse osmosis treatment processes

Masindi, Vhahangwele2017-11-012017-11-012017-08Masindi, V. 2017. Recovery of drinking water and valuable minerals from acid mine drainage using an integration of magnesite, lime, soda ash, CO(sub)2 and reverse osmosis treatment processes. Journal of Environmental Chemical Engineering 5(4), pp 3136-31422213-3437http://www.sciencedirect.com/science/article/pii/S2213343717302750http://hdl.handle.net/10204/9704Copyright: 2017 Elsevier. Due to copyright restrictions, the attached PDF file only contains the abstract of the full text item. For access to the full text item, please consult the publisher's website. The definitive version of the work is published in Journal of Environmental Chemical Engineering, vol 5(4), pp 3136-3142In this study, the possibility of recovering valuable minerals and drinking water from acid mine drainage was explored. Neutralisation of Acid Mine Drainage (AMD) and recovery of metals were done at 60 mins of equilibration. DOW water & Process solutions, Reverse Osmosis System Analysis (ROSA), version 9.1 was used to further purify the resultant water to meet the drinking quality standards as required by the South African National Standard (SANS) report (SANS 241). The obtained results revealed that drinking water, metals, gypsum, hydrated lime/limestone were recovered from the treatment process as valuable resources. This was confirmed by X-ray diffraction (XRD) and X-ray Fluorescence (XRF). Morphological properties of initial and recovered minerals were examined using High Resolution Scanning Electron Microscopy (HR-SEM). Carbon Dioxide (CO(sub2)) was bubbled through soda treated water to recover limestone and to stabilise the pH of the product water (pH ˜7.5). Post treatment, the resultant water was further purified by simulated Reverse Osmosis (RO) system to produce water that meet the drinking water quality as stipulated by SANS 241 standards. The pH of recovered drinking water was˜6.5. The metals removal efficiency of the RO system was ˜100%. In general, this study demonstrated that the integration of magnesite, lime, soda ash, CO(sub2) and reverse osmosis treatment processes can convert environmental pollutants and waste resources into commercially valuable products that have industrial applications.enAcid mine drainageGypsumBrucite and limestone recoveryMagnesiteLimeSoda ashCO (sub2) bubblingRecovery of drinking water and valuable minerals from acid mine drainage using an integration of magnesite, lime, soda ash, CO(sub)2 and reverse osmosis treatment processesArticleMasindi, V. (2017). Recovery of drinking water and valuable minerals from acid mine drainage using an integration of magnesite, lime, soda ash, CO(sub)2 and reverse osmosis treatment processes. http://hdl.handle.net/10204/9704Masindi, Vhahangwele "Recovery of drinking water and valuable minerals from acid mine drainage using an integration of magnesite, lime, soda ash, CO(sub)2 and reverse osmosis treatment processes." (2017) http://hdl.handle.net/10204/9704Masindi V. Recovery of drinking water and valuable minerals from acid mine drainage using an integration of magnesite, lime, soda ash, CO(sub)2 and reverse osmosis treatment processes. 2017; http://hdl.handle.net/10204/9704.TY - Article AU - Masindi, Vhahangwele AB - In this study, the possibility of recovering valuable minerals and drinking water from acid mine drainage was explored. Neutralisation of Acid Mine Drainage (AMD) and recovery of metals were done at 60 mins of equilibration. DOW water & Process solutions, Reverse Osmosis System Analysis (ROSA), version 9.1 was used to further purify the resultant water to meet the drinking quality standards as required by the South African National Standard (SANS) report (SANS 241). The obtained results revealed that drinking water, metals, gypsum, hydrated lime/limestone were recovered from the treatment process as valuable resources. This was confirmed by X-ray diffraction (XRD) and X-ray Fluorescence (XRF). Morphological properties of initial and recovered minerals were examined using High Resolution Scanning Electron Microscopy (HR-SEM). Carbon Dioxide (CO(sub2)) was bubbled through soda treated water to recover limestone and to stabilise the pH of the product water (pH ˜7.5). Post treatment, the resultant water was further purified by simulated Reverse Osmosis (RO) system to produce water that meet the drinking water quality as stipulated by SANS 241 standards. The pH of recovered drinking water was˜6.5. The metals removal efficiency of the RO system was ˜100%. In general, this study demonstrated that the integration of magnesite, lime, soda ash, CO(sub2) and reverse osmosis treatment processes can convert environmental pollutants and waste resources into commercially valuable products that have industrial applications. DA - 2017-08 DB - ResearchSpace DP - CSIR KW - Acid mine drainage KW - Gypsum KW - Brucite and limestone recovery KW - Magnesite KW - Lime KW - Soda ash KW - CO (sub2) bubbling LK - https://researchspace.csir.co.za PY - 2017 SM - 2213-3437 T1 - Recovery of drinking water and valuable minerals from acid mine drainage using an integration of magnesite, lime, soda ash, CO(sub)2 and reverse osmosis treatment processes TI - Recovery of drinking water and valuable minerals from acid mine drainage using an integration of magnesite, lime, soda ash, CO(sub)2 and reverse osmosis treatment processes UR - http://hdl.handle.net/10204/9704 ER -