A review of treatment technologies for the mitigation of the toxic environmental effects of acid mine drainage (AMD)
| Autor: | Stephen N. Oba, Shabnam Ahmadi, Chinenye Adaobi Igwegbe, Chukwunonso O. Aniagor, Setyo Budi Kurniawan, Kingsley O. Iwuozor, Oluwaseun Jacob Ajala, Felicitas U. Iwuchukwu, Joshua O. Ighalo |
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| Rok vydání: | 2022 |
| Předmět: |
Pollution
Environmental Engineering Waste management Environmental remediation General Chemical Engineering media_common.quotation_subject Advanced oxidation process Acid mine drainage Membrane technology Biochar Environmental Chemistry Environmental science Nanofiltration Safety Risk Reliability and Quality Reverse osmosis media_common |
| Zdroj: | Process Safety and Environmental Protection. 157:37-58 |
| ISSN: | 0957-5820 |
| Popis: | Acid mine drainage (AMD) is a multi-factor pollution formed from complex chemical, physical, and biological interactions that takes place under ambient conditions in abandoned and active mines. Over the years, researchers have been investigating ways to mitigate its potential impact on the environment through various treatment technologies. The aim of this review was to critically analyze the broad spectrum of treatment methods that have been engaged in published literature on the remediation of AMDs. Adsorption treatment using zeolites, fly ash, biochar activated carbon, clay-based minerals and biomass-based adsorbents was discussed. Given an appropriate choice of adsorbent, ions in AMD can be reduced between 50% and 99%. Membrane separation processes like nanofiltration, reverse osmosis and hybrid systems were discovered to be more effective than adsorption and can effect over 90% rejection at optimized conditions. Biological processes showed a far wider range of performance amongst all treatment types due to the selectivity in performance of the different micro-organisms used although Advanced Oxidation Process (AOPs) have been shown to achieve>80% ions removal. In all biological processes studied ranging from wetlands to bioreactors, algal bioreactors seemed the most effective in this domain. Most of these treatment technologies are corrective while preventive techniques can be explored to prevent the production of AMD. Despite the positive outcomes of the different types of treatment, they have associated technical issues. It is recommended that more preventive techniques be explored to reduce the production of AMD. The review discussed how AMD treatment would affect environmental protection and water resource management. |
| Databáze: | OpenAIRE |
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