Acid mine drainage: Prevention, treatment options, and resource recovery: A review

Towards zero-waste valorisation of rare-earth-containing industrial process residues: a critical review

Acid mine drainage (AMD) or acid rock drainage (ARD) is considered as one of the main pollutants of water in many countries that have historic or current mining activities. Its generation, release, mobility, and attenuation involves complex processes governed by a combination of physical, chemical, and biological factors. In general, AMD is produced by the oxidative dissolution of sulphide minerals. This paper reviews the current state-of-the-art of AMD. It critically analyses the work performed in recent years on its occurrence, effects (on human health, plant life and aquatic species), and summarizes the remediation approaches taken so far to overcome the problem of AMD. The challenges faced in tackling the remediation of AMD have also been considered. Commercially developed projects that are either in operation, being piloted or under evaluation have also been discussed. Finally, the paper speculates on future directions or opportunities that deserve exploration.

Acid mine drainage: Challenges and opportunities

A review of recent strategies for acid mine drainage prevention and mine tailings recycling.

The past few years have witnessed a rapid evolution of perovskite solar cells, an unprecedented photovoltaic (PV) technology with both relatively low cost and high power conversion efficiency. In this paper, we perform a life cycle assessment for two types of solution-processed perovskite solar modules to shed light on the environmental performance of this promising class of PVs. One module is equipped with FTO glass, a gold cathode, and mesoporous TiO2 scaffold; the other is equipped with ITO glass, a silver cathode, and ZnO thin film. We develop comprehensive life cycle inventories (LCIs) for all components used in the modules. Based on the LCI results, we conduct life cycle impact assessment for 16 common life cycle impact indicators, Eco-indicator 99, and two sustainable indicators: the energy payback time (EPBT) and the CO2 emission factor. We compare the results of Eco-indicator 99, the EPBT, and the CO2 emission factor among existing PV technologies, and further perform uncertainty analysis and sensitivity analysis for the two modules. The results demonstrate that perovskite solar modules possess the shortest EPBT, and future research should be directed to improving the system performance ratio and the device lifetime, and reducing precious metal consumption and energy-intensive operations in order to lower the CO2 emission factor.

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Papers

Acid Mine Drainage (AMD): causes, treatment and case studies