Field Trials of Low-cost Reactive Media for the Passive Treatment of Circum-neutral Metal Mine Drainage in Mid-Wales, UK

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dc.contributor.author Warrender, R.
dc.contributor.author Pearce, N. J. G.
dc.contributor.author Perkins, W. T.
dc.contributor.author Florence, K. M.
dc.contributor.author Brown, A. R.
dc.contributor.author Sapsford, D. J.
dc.contributor.author Bowell, R. J.
dc.contributor.author Dey, M.
dc.date.accessioned 2011-05-17T09:21:30Z
dc.date.available 2011-05-17T09:21:30Z
dc.date.issued 2011-06-01
dc.identifier.citation Warrender , R , Pearce , N J G , Perkins , W T , Florence , K M , Brown , A R , Sapsford , D J , Bowell , R J & Dey , M 2011 , ' Field Trials of Low-cost Reactive Media for the Passive Treatment of Circum-neutral Metal Mine Drainage in Mid-Wales, UK ' Mine Water and the Environment , vol 30 , no. 2 , pp. 82-89 . en
dc.identifier.issn 1616-1068
dc.identifier.other PURE: 160126
dc.identifier.other dspace: 2160/6750
dc.identifier.uri http://hdl.handle.net/2160/6750
dc.description.abstract This paper addresses the ability of five low-cost reactive materials to remove Zn, Pb, and Cd from Fe-poor, circum-neutral pH metal mine water in Mid-Wales, UK. Compost, fly ash, waste shell material, iron ochre, and a mixture of blast furnace slag (BFS) and basic oxygen furnace slag (BOS) were used in a series of small-scale passive treatment cells to assess metal removal from mine drainage initially containing, on average, 23.5 mg/L Zn, 0.5 mg/L Pb, and 0.05 mg/L Cd. Trial treatment cells contained between 1.5 and 12 kg of reactive media, had a 15 min residence time, and treated a discharge of up to 1 L per minute. Fly ash from a peat-fired power station was found to be the most effective material for metal removal, with concentrations reduced to 0.02 mg/L Zn, 0.0069 mg/L Pb, and 0.0001 mg/L Cd from over 1,000 L of water (between 98.6 and 99.9% removal). The other materials initially achieved high levels of metal removal (between 75 and 99.9% Zn, Pb, and Cd removed); however, all of the materials were saturated with Zn after less than 200 L of water had been treated. Metal sorption ranged from 21.4 mg/g Zn for the peat fly ash to 0.0015 mg/g Cd for the compost and BOS/BFS slag. The results of the pilot-scale field trials can be scaled to demonstrate that a modest-sized fly ash treatment cell (2.6 × 2.6 × 1 m) in size would be sufficient to remove 90% of the total metal load (Pb, Zn, and Cd) from this 10 L/min mine water discharge for a 1 year period. Importantly this research demonstrates that passive treatment for metal mine drainage can comply with water quality directives but cannot be considered a ‘walk-away’ solution; it requires modest (potentially annual) maintenance. en
dc.language.iso eng
dc.relation.ispartof Mine Water and the Environment en
dc.subject Circum-neutral mine water en
dc.subject Low-cost reactive materials en
dc.subject Passive treatment en
dc.subject Wales (UK) en
dc.title Field Trials of Low-cost Reactive Media for the Passive Treatment of Circum-neutral Metal Mine Drainage in Mid-Wales, UK en
dc.type Text en
dc.type.publicationtype Article (Journal) en
dc.identifier.doi http://dx.doi.org/10.1007/s10230-011-0150-8
dc.contributor.institution Institute of Geography & Earth Sciences en
dc.contributor.institution Other IGES Research en
dc.description.status Peer reviewed en


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