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Novel approach to zinc removal from circum-neutral mine waters using pelletised recovered hydrous ferric oxide

Mayes, William M.; Potter, Hugh A. B.; Jarvis, Adam P.

Authors

Hugh A. B. Potter

Adam P. Jarvis

Abstract

Data are presented which evaluate the performance of a pilot-scale treatment system using pelletised hydrous ferric oxide (HFO; a waste stream from coal mine water treatment) as a high surface area sorbent for removing zinc (Zn) from a metal mine water discharge in the North Pennines Orefield, UK. Over a 10-month period the system removed Zn at mean area- and volume-adjusted removal rates of 3.7 and 8.1 g m(-3) day(-1), respectively, with a mean treatment efficiency of 32% at a low mean residence time of 49 min. There were seasonal effects in Zn removal owing to establishment and dieback of algae in the treatment tank. This led to increased Zn uptake in early summer months followed by slight Zn release upon algae senescence. In addition to these biosorptive processes, the principal sinks for Zn appear to be (1) sorption onto the HFO surface. and (2) precipitation with calcite-dominated secondary minerals. The latter were formed as a product of dissolution of portlandite in the cement binder and calcium recarbonation. Further optimisation of the HFO pelletisation process holds the possibility for providing a low-cost, low footprint treatment option for metal rich mine waters, in addition to a valuable after-use for recovered HFO from coal mine water treatment facilities. (c) 2008 Elsevier B.V. All rights reserved.

Journal Article Type Article
Publication Date Feb 15, 2009
Journal JOURNAL OF HAZARDOUS MATERIALS
Print ISSN 0304-3894
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 162
Issue 1
Pages 512-520
Institution Citation Mayes, W. M., Potter, H. A. B., & Jarvis, A. P. (2009). Novel approach to zinc removal from circum-neutral mine waters using pelletised recovered hydrous ferric oxide. Journal of hazardous materials, 162(1), (512-520). doi:10.1016/j.jhazmat.2008.05.078. ISSN 0304-3894
DOI https://doi.org/10.1016/j.jhazmat.2008.05.078
Keywords Mine water; Hydrous ferric oxide; Remediation; Zinc
Publisher URL https://www.sciencedirect.com/science/article/pii/S030438940800753X?via%3Dihub