Gravel Bed Reactors (GBRs): Effective Treatment of Metals in Surface Water and Groundwater at Mine Sites
« All Publications

The mining industry continues to require robust, reliable and cost-effective treatment technologies to remove metals and inorganics from surface waters and groundwater at active and abandoned sites.

Recently, selenium has emerged as an expensive and challenging problem to solve. Gravel Bed Reactor (GBR™) technology is proving to be effective in treating selenium and nitrate, and GBRs have also been shown to be capable of treating problematic metals such as arsenic, zinc, chromium, uranium, cadmium and lead. GBRs consist of an engineered bed of gravel or waste rock. Amendments such as carbon-based electron donors, nutrients or pH buffers are added to the water at the inlet of the GBR to reduce or immobilize the metals and inorganics. GBRs offer simpler, less engineered systems compared to conventional above-ground water treatment facilities. The need for less infrastructure allows easier installation of smaller systems in less accessible locations such as montane topography, and the potential to treat water at/near the source of impact. This presentation will describe case studies where GBRs have been effectively used to treat selenium, nitrate, arsenic and other metals.

Publication Summary

  • Geosyntec Authors: Evan Cox, Silvia Mancini, Rachel James, Andrzej Przepiora, Karen Bechard, Mike Hayes, Kevin Coffey, Kevin Dufresne, Ali Nasseri-Moghaddam
  • All Authors: Evan Cox, Silvia Mancini, Rachel James, Andrzej Przepiora, Karen Bechard, Mike Hayes, Kevin Coffey, Kevin Dufresne, Ali Nasseri-Moghaddam
  • Title: MineXChange 2020 Society for Mining, Metallurgy & Exploration (SME) Annual Conference & Expo
  • Event or Publication: Event
  • Practice Areas: Groundwater Assessment and Remediation
  • Citation: Evan Cox, M.Sc. (Ontario) and Fabrizio Mascioni, R.G. (Arizona) will present at the MineXChange 2020 Society for Mining, Metallurgy & Exploration (SME) Annual Conference & Expo in Phoenix, Arizona on February 23-26, 2020.
  • Date: February 23-26, 2020
  • Location: Phoenix, Arizona
  • Publication Type: Platform Presentation