Geochemical insights and model optimisation for pilot-scale passive treatment of manganese and zinc in a legacy mine in Japan.

ABSTRACT: Elevated concentrations of manganese (Mn²⁺) and zinc (Zn²⁺) in water bodies can disrupt ecosystems and damage aquatic life. However, the mechanisms underlying the removal of Mn²⁺ and Zn²⁺ under dynamic conditions and the optimal hydraulic retention time (HRT) for passive treatment plants remain unclear. Here, a pilot-scale passive treatment system for the removal of Mn²⁺ and Zn²⁺ from legacy mine drainage in northern Japan is proposed; it was performed at circumneutral pH for 152 days. Comprehensive suspended solid mineralogy analyses and geochemical and numerical modelling were conducted to optimise the passive treatment efficiency. Mn²⁺ removal (efficiency reaching 98 %) primarily depended on the activity of Mn-

SUBMITTER: Tum S 

PROVIDER: S-EPMC11616510 | biostudies-literature | 2024 Nov

REPOSITORIES: biostudies-literature