Etifeddiaeth cloddio am lo ym maes glo de Cymru: llygredd dŵr ac opsiynau i’w leihau

Etifeddiaeth cloddio am lo ym maes glo de Cymru: llygredd dŵr ac opsiynau i’w leihau
Nia Blackwell, William. T. Perkins ac Arwyn Edwards

Mae cloddio am lo a phrosesau cysylltiedig wedi effeithio ar amgylchedd naturiol rhan orllewinol maes glo de Cymru wrth i ddŵr llygredig sy’n arllwys o hen lofeydd gyrraedd y system hydrolegol leol. Mae gwaddol y gwaith cloddio yn yr ardal hon yn cynnwys ffurfiant dŵr llygredig, a lifa o sawl hen lofa, yn ogystal â ffurfiant mwynau haearn. Yn yr erthygl hon trafodir y prosesau tanddaearol sydd ar waith yn y glofeydd sy’n arwain at ffurfiant dŵr llygredig a mwynau haearn. Ymdrinnir yn benodol â phedair o’r hen lofeydd gan edrych ar y gwahanol systemau trin dŵr a ddefnyddir ar y safleoedd hynny. Mae’r systemau yn trin y dŵr llygredig drwy gael gwared â’r haearn fel bod y crynodiadau terfynol yn is na’r trothwy a bennwyd gan y Gyfarwyddeb Fframwaith Dŵr.

Enillydd Gwobr Gwerddon 2015.


  	Nia Blackwell, William. T. Perkins ac Arwyn Edwards, 'Etifeddiaeth cloddio am lo ym maes glo de Cymru: llygredd dŵr ac opsiynau i’w leihau', Gwerddon, 18, Medi 2014, 55-76.


    Cloddio am lo, llygredd dŵr, systemau trin dŵr.


  1. Awdurdod Glo (dim dyddiad), [Cyrchwyd: 29 Medi 2013].
  2. Banks, D., Younger, P. L., Arnesen, R. T., et al. (1997), ‘Mine-water chemistry: the good, the bad and the ugly’, Environmental Geology, 32 (3), 157-74.
  3. Barclay, W. J., Taylor, K., Thomas, L. P., et al. (1988), Geology of the South Wales Coalfield. Part V. The Country around Merthyr Tydfil (Keyworth, British Geological Survey).
  4. Batty, L. C., a Younger, P. L. (2002), ‘Critical role of macrophytes in achieving low iron concentrations in mine water treatment systems’, Environmental Science and Technology, 36, 3997-4002.
  5. Bearcock, J. M. (2007), ‘Remediation of mine drainage using naturally-occurring iron oxyhydroxides’, traethawd PhD., Prifysgol Aberystwyth, Aberystwyth.
  6. Bearcock, J. M., Perkins, W. T., Dinelli, E., et al. (2006), ‘Fe(II)/Fe(III) ‘green rust’ developed within ocherous coal-mine drainage sediment in South Wales, UK’, Mineralogical Magazine, 70, 731-41.
  7. Borja, A., Franco, J., Valencia, V., et al. (2004), ‘Implementation of the European water framework directive from the Basque country (northern Spain): a methodological approach’, Marine Pollution Bulletin, 48 (3-4), 209-18.
  8. Borja, A., Josefson, A. B., Miles, A., et al. (2007), ‘An approach to the intercalibration of benthic ecological status assessment in the North Atlantic ecoregion, according to the European Water Framework Directive’, Marine Pollution Bulletin, 55 (1-6), 42-52.
  9. Cole, J. E., Miliorizos, M., Frodsham, K., et al. (1991), ‘Variscan structures in the opencast coal sites of the South Wales Coalfield’, Proceedings of the Ussher Society, 7, 375-9.
  10. Cornell, R. M., a Schwertmann, U. (2000), The iron oxides structure, properties, reactions, occurrence and uses (New York: VCH Publishers).
  11. Coulton, R., Bullen, C., a Hallet, C. (2003a), ’The design and optimisation of active mine water treatment plants’, Land Contamination and Reclamation, 11 (2), 273-9.
  12. Coulton, R., Bullen, C., Dolan, J., et al. (2003b), ‘Wheal Jane mine water active treatment plant – design, construction and operation’, Land Contamination and Reclamation, 11 (2), 245-52.
  13. Davies, S. J., Guion, P. D., a Gutteridge, P. (2012), ‘Carboniferous sedimentation and volcanism on the Larussian margin’, yn Woodcock, N., a Strachan, R. (goln), Geological History of Britain and Ireland (2ail argraffiad, Oxford: Blackwell Science), tt. 227-70.
  14. De Vos, W., Tarvainen, T., a Salminen, R. M., et al. (2006), Geochemical Atlas of Europe. Part 2 – Interpretation of Geochemical Maps, Additional Tables, Figures, Maps and Related Publications (Espoo: Geological Survey of Finland).
  15. Drever, J. I. (1997), The Geochemistry of Natural Waters: surface and groundwater environments (3ydd argraffiad, New Jersey: Prentice Hall).
  16. Evans, K. A., Watkins, D. C., a Banwart, S. A. (2006), ‘Rate controls on the chemical weathering of natural polymineralic material II. Rate controlling mechnisms and mineral sources and sinks for element release from four UK mine-sites, and implications for comparison of laboratory and field scale weathering studies’, Applied Geochemistry, 21, 377-403.
  17. Falkowski, P. G., Fenchel, T., a Delong, E. F. (2008), ‘The microbial engines that drive earth’s biogeochemical cycles’, Science, 320, 1034-9.
  18. Fowler, P., a Gayer, R. A. (1999), ‘The association between tectonic deformation, inorganic composition and coal rank in the bituminous coals from the South Wales coalfield, United Kingdom’, International Journal of Coal Geology, 42, 1-31.
  19. Fuge, R., Laidlaw, I. M. S., Perkins, W. T., et al. (1991), ‘The influence of acid mine and spoil drainage on water quality in the mid-Wales area’, Environmental Geochemistry and Health, 13 (2), 70-5.
  20. Geroni, J. N. (2011), ‘Rates and mechanisms of chemical processes affecting the treatment of ferruginous mine water’, traethawd PhD, Prifysgol Caerdydd, Caerdydd.
  21. Geroni, J. N., Sapsford, D. J., Barnes, A., et al. (2009), ‘Current performance of passive treatment systems in South Wales, UK’, Abstracts of the International Mine Water Conference, 19-23 Hydref (Pretoria: Internation Mine Water Association), 486-94.
  22. Hedrich, S., Schlomann, M., a Johnson, D. B. (2011), ‘The iron-oxidizing proteobacteria’, Microbiology, 157 (6), 1551-64.
  23. Hedrich, S., a Johnson, D. B. (2012), ‘A modular continuous flow reactor system for the selective bio-oxidation of iron and precipitation of shwertmannite from mine-impacted waters’, Bioresource Technology, 106, 44-9.
  24. Hornung, M., Le-Grice, S., Brown, N., et al. (1990), ‘The role of geology and soils in controlling water acidity in Wales’, yn Edwards, R. W., Gee, A. S., a Stoner, J. H. (goln), Acid Waters in Wales (Dordrecht: Kluwer Academic Publishers), 55-66.
  25. Johnson, D. B. (2003), ‘Chemical and microbiological characteristics of mineral spoils and drainage waters at abandoned coal and metal mines’, Water, Air and Soil Pollution, 3, 47-66.
  26. Johnson, D. B., a Hallberg, K. B. (2002), ‘Pitfalls of passive mine water treatment’, Reviews in Environmental Science and Biotechnology, 1 (4), 335-43.
  27. Johnson, D. B., a Hallberg, K. B. (2003), ‘The microbiology of acid mine drainage’, Research in Microbiology, 154, 466-73.
  28. Johnson, D. B., a Hallberg, K. B. (2005), ‘Acid mine drainage remediation options: a review’, Science of the Total Environment, 338, 3-14.
  29. Lewis, B. (1971), Coal mining in the eighteenth and nineteenth centuries (London: Longman).
  30. Meredith, E. L., a Kuzara, S. L. (2012), ‘Identification and quantification of base flow using carbon isotopes’, Ground Water, 50 (6), 959-65.
  31. Neubauer, S. C., Emerson, D., a Megonigal, J. P. (2002), ‘Life at the energetic edge: kinetics of circumneutral iron oxidation by lithotrophic iron-oxidizing bacteria isolated from the wetland-plant rhizosphere’, Applied Environmental Microbiology, 68, 3988-95.
  32. Nordstrom, D. K. (2011), ‘Mine waters: acidic to circumneutral’, Elements, 7, 393-8.
  33. Nordstrom, D. K., Jenne, E. A., a Ball, J. W. (1979), ‘Redox equilibria of iron in acid mine waters. Chemical Modeling in Aqueous Systems’, yn Jenne, E. A. (gol.), Chemical Modeling in Aqueous Systems (California: American Chemical Society), tt. 51-79.
  34. Nordstrom, D. K., ac Alpers, C. N. (1999), ‘Geochemistry of acid mine waters’, yn Plumlee, G. S., a Logsdon, M. J. (goln), The Environmental Geochemistry of Mineral Deposits: Part A. Processes, Techniques and Health Issues (Littleton: Society of Economic Geologists), tt. 133-60. NRFA (dim dyddiad), [Cyrchwyd: 15 Mehefin 2013].
  35. Parker, K. (2003), ‘Mine water management on a national scale: experiences from the coal authority’, Land Contamination and Reclamation, 11 (2), 181-90.
  36. Rees, B., a Connelly, R. (2003), ‘Review of design and performance of the Pelenna wetland systems’, Land Contamination and Reclamation, 11 (2), 293-300.
  37. Rose, A. W., a Cravotta, C. A., III (1998), ‘Geochemistry of coal mine-drainage’, yn Brady, K. B. C., Smith M. W., a Schueck, J. (goln), Coal Mine Drainage Prediction and Pollution Prevention in Pennsylvania (Harrisburg: Department of Environmental Protection), 1.1-1.22.
  38. Salimnen, R., Batista, M. J., Bidovec, M., et al. (2005), Geochemical Atlas of Europe, Part 1 – Background Information, Methodology and Maps (Espoo: Geological Survey of Finland).
  39. Singer, P. C., a Stumm, W. (1970), ‘Acidic mine drainage: the rate-determining step’, Science, 167, 1121-3.
  40. Shen, Y., a Buick, R. (2004), ‘The antiquity of microbial sulphate reduction’, Earth-Science Reviews, 64, 243-72.
  41. Stumm, W., a Morgan, J. J. (1996), Aquatic Chemistry: Chemical Equilibria and Rates in Natural Waters (New York: John Wiley & Sons).
  42. Wardle, P. (2011), ‘The selective heating of pyrite in the coal using microwave energy’, traethawd PhD., Prifysgol Nottingham, Nottingham.
  43. Watson, I. A. (2007), ‘Managing minewater in abandoned coalfields using engineered gravity discharges’, Proceedings of the IMWA Symposia (Cagliari: International Mine Water Association), 355-9.
  44. Waybrant, K. R., Ptacek, C. J. a Blowes, D. W. (2002), ‘Treatment of mine drainage using permeable reactive barriers: column experiments’, Environmental Science and Technology, 36 (6), 1349-1356.
  45. Webber, K., Achenbach, L. A., a Coates, J. D. (2006), ‘Microorganisms pumping iron: anaerobic microbial oxidation and reduction’, Nature Reviews Microbiology, 4, 752-64.
  46. Whitehead, P. G., Hall, G., Neal, H., et al. (2005), ‘Chemical behaviour of the Wheal Jane bioremediation system’, Science of the Total Environment, 338 (1-2), 41-51.
  47. Wilby, R. L., Orr, H. G., Hedger, M., et al. (2006), ‘Risks posed by climate change to the delivery of the Water Framework Directive in the UK’, Environment International, 32 (8), 1043-55.
  48. Wiseman, I. M., ac Edwards P. J. (2004), ‘Constructed wetlands for minewater treatment: performance and sustainability’, Water and Environment Journal, 18 (3), 127-32.
  49. Younger, P. L. (1997), ‘The longevity of minewater pollution: a basis for decision-making’, The Science of the Total Environment, 194/195, 457-66.
  50. Younger, P. L. (2000), ‘The adoption and adaptation off passive treatment technologies for mine waters in the United Kingdom’, Mine Water and the Environment, 19, 84-97.
  51. Younger, P. L., a Robins, N. S. (2002), ‘Challenges in the characterization of the hydrogeology and geochemistry of mined ground’, Mine Water Hydrology and Geochemistry, 198, 1-16.
  52. Younger, P. L., Jayaweera, A., Elliot, A., et al. (2003), ‘Passive treatment of acidic mine waters in subsurface-flow systems: exploring RAPS and permeable reactive barriers’, Land Contamination and Reclamation, 11 (2), 127-13.