Reactive transport modelling to investigate multi-scale waste rock weathering processes.

摘要: Abstract Prediction of drainage quantity and quality is critical to reduce the environmental risks associated with weathering mine waste rock. Reactive transport models can be effective tools understand disentangle processes underlying waste-rock drainage, but their validity applicability impaired by poor parametrization non-uniqueness conundrum. Here, a process-based multicomponent reactive model presented interpret quantify affecting from 15 waste- rock experiments Antamina mine, Peru. The deployed uniform flow formulation consistent set geochemical rate equations could calibrated almost exclusively measured bulk properties in ranging 2 kg 6500 tons size. quantitative agreement between simulated dynamics observed records, for systems variety lithologies over wide range pH, supports proposed selection processes. controls important physicochemical feedbacks such as secondary mineral precipitation, surface passivation, oxygen limitations, were confirmed through sensitivity analyses. Our work shows that evidence-based used explain across laboratory field scales.