Show simple item record Warrender, R. Pearce, N. J. G. Perkins, W. T. Florence, K. M. Brown, A. R. Sapsford, D. J. Bowell, R. J. Dey, M. 2011-05-17T09:21:30Z 2011-05-17T09:21:30Z 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 . DOI: 10.1007/s10230-011-0150-8 en
dc.identifier.issn 1616-1068
dc.identifier.other PURE: 160126
dc.identifier.other PURE UUID: 988d5cd4-45bb-4af0-9b62-9287baa42595
dc.identifier.other dspace: 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.rights 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 /dk/atira/pure/researchoutput/researchoutputtypes/contributiontojournal/article en
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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