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- Title
Assessing Options for Remediation of Contaminated Mine Site Drainage Entering the River Teign, Southwest England.
- Authors
Jordan, Abigail; Hill, Rachel; Turner, Adrienne; Roberts, Tyrone; Comber, Sean
- Abstract
The river Teign in Devon has come under scrutiny for failing to meet environmental quality standards for ecotoxic metals due to past mining operations. A disused mine known as Bridford Barytes mine, has been found to contribute a significant source of Zn, Cd and Pb to the river. Recently, studies have been focused on the remediation of such mine sites using low-cost treatment methods to help reduce metal loads to the river downstream. This paper explores the metal removal efficiency of red mud, a waste product from the aluminium industry, which has proven to be an attractive low-cost treatment method for adsorbing toxic metals. Adsorption kinetics and capacity experiments reveal metal removal efficiencies of up to 70% within the first 2 h when red mud is applied in pelletized form. Further, it highlights the potential of biochar, another effective adsorbent observed to remove >90% Zn using agricultural feedstock. Compliance of the Teign has been investigated by analysing dissolved metal concentrations and bioavailable fractions of Zn to assess if levels are of environmental concern. By applying a real-world application model, this study reveals that compressed pellets and agricultural biochar offer an effective, low-cost option to reducing metal concentrations and thus improving the quality of the river Teign.
- Subjects
ENGLAND; MINE drainage; DEVON Energy Corp.; HAZARDOUS waste sites; METAL content of water; ENVIRONMENTAL quality; MINES &; mineral resources; ALUMINUM industry; ALUMINUM
- Publication
Minerals (2075-163X), 2020, Vol 10, Issue 8, p721
- ISSN
2075-163X
- Publication type
Article
- DOI
10.3390/min10080721