Yes, but it is complicated. Eh, pH, ORP, microbe population, sulfate, organic carbon and iron are all variables on heavy metal removal. Understand the existing biological and physico-chemical properties of a site-specific conditions before attempting to change them. You will probably have to work within the existing pH range, especially with groundwater. Working with Jan Bogacki of the Warsaw University of Technology, Dr. Bogacki found that ZVI/H2O2 process allows effective heavy metals and boron removal. Two alternative advanced oxidation processes (Fe2+/H2O2 and Fe0/H2O2). Both oxidation processes that were used met the technical FGD wastewater treatment requirements of the BAT. The best treatment effects, expressed as pollutants’ removal, were obtained for the Fe2+/H2O2 process.
Bogacki, J., Marcinowski, P., Majewski, M., Zawadzki, J., & Sivakumar, S. (2018). Alternative approach to current EU BAT recommendation for coal-fired power plant flue gas desulfurization wastewater treatment. Processes, 6(11), 9–13. https://doi.org/10.3390/pr6110229