Document Detail


Performance of a passive treatment system for net-acidic coal mine drainage over five years of operation.
MedLine Citation:
PMID:  20605568     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
A full-scale passive treatment system (PTS) was commissioned in 2003 to treat two net-acidic coal mine water discharges in the Durham coalfield, UK. The principal aim of the PTS was to decrease concentrations of iron (<177 mg L(-1)) and aluminium (<85 mg L(-1)) and to increase pH (>3.2) and alkalinity (> or =0 mg L(-1) CaCO(3) eq). Secondary objectives were to decrease zinc (<2.8 mg L(-1)), manganese (<20.5 mg L(-1)) and sulfate (<2120 mg L(-1)). Upon treatment, water qualities were improved by 84% in the case of Fe, 87% Al, 83% acidity, 51% Zn, 23% Mn and 29% SO(4)(2)(-). Alkalinity (74%) and pH (95% as H(+)) were increased. Area adjusted removal rates (Fe=1.49+/-0.66 g d(-1) m(-2); acidity=6.7+/-4.9 g d(-1) m(-2)) were low compared to design criteria, mainly due to load limitation. Disregarding seasonality effects, acidity removal and effluent pH were stable over time. A substantial temporal decrease in calcium and alkalinity generation suggests that limestone is increasingly armoured. Once pH is no longer buffered by the carbonate system, metals could be remobilized, putting treatment efficiency at risk.
Authors:
Romy Matthies; Andrew C Aplin; Adam P Jarvis
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Publication Detail:
Type:  Evaluation Studies; Journal Article; Research Support, Non-U.S. Gov't     Date:  2010-07-06
Journal Detail:
Title:  The Science of the total environment     Volume:  408     ISSN:  1879-1026     ISO Abbreviation:  Sci. Total Environ.     Publication Date:  2010 Sep 
Date Detail:
Created Date:  2010-08-23     Completed Date:  2010-09-24     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0330500     Medline TA:  Sci Total Environ     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  4877-85     Citation Subset:  IM    
Copyright Information:
Copyright 2010 Elsevier B.V. All rights reserved.
Affiliation:
School of Civil Engineering and Geosciences, Newcastle University, Newcastle upon Tyne, NE1 7RU, UK. romy.matthies@ncl.ac.uk
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MeSH Terms
Descriptor/Qualifier:
Aluminum / analysis
Coal Mining*
Environmental Monitoring
Environmental Remediation / methods*
Fresh Water / chemistry
Iron / analysis
Metals / analysis*
Seasons
Time
Water Movements
Water Pollutants, Chemical / analysis*
Water Pollution, Chemical / prevention & control*
Zinc / analysis
Chemical
Reg. No./Substance:
0/Metals; 0/Water Pollutants, Chemical; 7429-90-5/Aluminum; 7439-89-6/Iron; 7440-66-6/Zinc

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