A review of acid rock drainage, seasonal flux of discharge and metal concentrations, and passive treatment system limitations

References

• A. Akcil and S. Koldas, Acid Mine Drainage (AMD): Causes, treatment and case studies, J Clean. Prod. 14 (2006), pp. 1139–1145. doi:10.1016/j.jclepro.2004.09.006.
   Web of Science ®Google Scholar
• R.S. Hedin, R.W. Narin, and R.L. Kleinmann, Passive Treatment of Coal Mine Drainage, US Department of the Interior Bureau of Mines, Pittsburgh, PA, 1994.
   Google Scholar
• M.C. Moncur, C.J. Ptacek, M. Hayashi, D.W. Blowes, and S.J. Birks, Seasonal cycling and mass-loading of dissolved metals and sulfate discharging from an abandoned mine site in northern Canada, Appl. Geochem. 41 (2014), pp. 176–188. doi:10.1016/j.apgeochem.2013.12.007.
   Web of Science ®Google Scholar
• D.K. Nordstrom, Acid rock drainage and climate change, J. Geochem. Explor. 100 (2009), pp. 97–104. doi:10.1016/j.gexplo.2008.08.002.
   Web of Science ®Google Scholar
• T.J. Hengen, M.K. Squillace, A.D. O’Sullivan, and J.J. Stone, Life cycle assessment analysis of active and passive acid mine drainage treatment technologies, Resour. Conserv. Recycl. 86 (2014), pp. 160–167. doi:10.1016/j.resconrec.2014.01.003.
   Web of Science ®Google Scholar
• D.B. Johnson and K.B. Hallberg, Acid mine drainage remediation options: A review, Sci. Total Environ. 338 (2005), pp. 3–14. doi:10.1016/j.scitotenv.2004.09.002.
   PubMed Web of Science ®Google Scholar
• N.O. Egiebor and B. Oni, Acid rock drainage formation and treatment: A review, Asia-Pac. J. Chem. Eng. 2 (2007), pp. 47–62. doi:10.1002/apj.57.
   Web of Science ®Google Scholar
• K.K. Kefeni, T.A.M. Msagati, and B.B. Mamba, Acid mine drainage: Prevention, treatment options, and resource recovery: A review, J. Clean. Prod. 151 (2017), pp. 475–493. doi:10.1016/j.jclepro.2017.03.082.
   Web of Science ®Google Scholar
• J. Skousen, C.E. Zipper, A. Rose, P.F. Ziemkiewicz, R. Nairn, L.M. McDonald, Review of passive systems for acid mine drainage treatment, Mine Water Environ. 36 (2017), pp. 133–153. doi:10.1007/s10230-016-0417-1.
   Web of Science ®Google Scholar
• R.D. Ludwig, R.G. McGregor, D.W. Blowes, S.G. Benner, and K. Mountjoy, A permeable reactive barrier for treatment of heavy metals, Ground Water 40 (2002), pp. 59–66. doi:10.1111/j.1745-6584.2002.tb02491.x.
   PubMed Web of Science ®Google Scholar
• P.B. McMahon, K.F. Dennehy, and M.W. Sandstrom, Hydraulic and geochemical performance of a permeable reactive barrier containing zero-valent iron, Denver Federal Center, Ground Water 37 (1999), pp. 396–404. doi:10.1111/j.1745-6584.1999.tb01117.x.
   Web of Science ®Google Scholar
• R.W. Puls, R.M. Powell, C.J. Paul, and D. Blowes, Groundwater remediation of chromium using zero-valent iron in a permeable reactive barrier, in Innovative Subsurface Remediation, American Chemical Society, 1999, pp. 182–194. doi:10.1021/bk-1999-0725.ch013.
   Google Scholar
• L. Li, C.H. Benson, and E.M. Lawson, Impact of mineral fouling on hydraulic behavior of permeable reactive barriers, Groundwater 43 (2005), pp. 582–596. doi:10.1111/j.1745-6584.2005.0042.x.
   PubMed Web of Science ®Google Scholar
• E. Gozzard, W.M. Mayes, H.A.B. Potter, and A.P. Jarvis, Seasonal and spatial variation of diffuse (non-point) source zinc pollution in a historically metal mined river catchment, UK, Environ. Pollut. 159 (2011), pp. 3113–3122. doi:10.1002/ep.670040311.
   PubMed Web of Science ®Google Scholar
• D.L. Harris, B.G. Lottermoser, and J. Duchesne, Ephemeral acid mine drainage at the Montalbion silver mine, north Queensland, Aust J. Earth Sci. 50 (2003), pp. 797–809. doi:10.1111/j.1440-0952.2003.01029.x.
   Web of Science ®Google Scholar
• E.E. August, D.M. McKnight, D.C. Hrncir, and K.S. Garhart, Seasonal variability of metals transport through a wetland impacted by mine drainage in the Rocky Mountains, Environ. Sci. Technol. 36 (2002), pp. pp. 3779–3786. doi:10.1021/es015629w.
   PubMed Web of Science ®Google Scholar
• P. Brooks, D. McKnight, and K. Bencala, Annual maxima in Zn concentrations during spring snowmelt in streams impacted by mine drainage, Environ. Geol. 40 (2001), pp. 1447–1454. doi:10.1007/s002540100338.
   Google Scholar
• T.W. Butler, Isotope geochemistry of drainage from an acid mine impaired watershed, Oakland, California, Appl. Geochem. 22 (2007), pp. 1416–1426. doi:10.1016/j.apgeochem.2007.01.009.
   Web of Science ®Google Scholar
• K.U. Mayer, S.G. Benner, and D.W. Blowes, Process-based reactive transport modeling of a permeable reactive barrier for the treatment of mine drainage, J. Contam. Hydrol. 85 (2006), pp. 195–211. doi:10.1016/j.jconhyd.2006.02.006.
   PubMed Web of Science ®Google Scholar
• C. Costello, Acid mine drainage: Innovative treatment technologies, US EPA Office of Solid Waste and Emergency Response Technology Innovation Office, Washington, D.C., 2003.
   Google Scholar
• D.A. Kepler and E.C. McCleary, Successive alkalinity-producing systems (SAPS) for the treatment of acidic mine drainage, U.S. Bureau of Mines Special Publication SP 06A. (1994), pp. 195–204. doi:10.21000/JASMR94010195.
   Google Scholar
• A. RoyChowdhury, D. Sarkar, and R. Datta, Remediation of acid mine drainage-impacted water, Curr. Pollut. Rep. 1 (2015), pp. 131–141. doi:10.1007/s40726-015-0011-3.
   Web of Science ®Google Scholar
• M.S. Ali, Remediation of acid mine waters, in 11th International Mine Water Association Congress- Mine Water- Managing the Challenges, R.T. Rude and A. Freund, eds., Wolkersdorfer, Aachen, 2011, pp. 253–257. ISBN 978-1-897009-47-5.
   Google Scholar
• M.A. Caraballo, E. Santofimia, and A.P. Jarvis, Metal retention, mineralogy, and design considerations of a mature permeable reactive barrier (PRB) for acidic mine water drainage in Northumberland, U.K., Am. Mineral. 95 (2010), pp. 1642–1649. doi:10.2138/am.2010.3505.
   Web of Science ®Google Scholar
• A. Johnston, R.L. Runkel, A. Navarre-Sitchler, and K. Singha, Exploration of diffuse and discrete sources of acid mine drainage to a headwater mountain stream in Colorado, USA, Mine Water Environ. 36 (2017), pp. 463–478. doi:10.1007/s10230-017-0452-6.
   Web of Science ®Google Scholar
• A.N. Shabalala, S.O. Ekolu, and S. Diop, Permeable reactive barriers for acid mine drainage treatment: A review, Constr. Mater. Struct. (2014), pp. 1416–1426. doi:10.3233/978-1-61499-466-4-1416.
   Google Scholar
• R.M. Powell, R.W. Puls, D.W. Blowes, J.L. Vogan, R.W. Gillham, P.D. Powell, T. Sivavec, and R. Landis, Permeable reactive barrier technologies for contaminant remediation. EPA/600/R-98/125 (NTIS 99-105702), Washington, D.C., 1998.
   Google Scholar
• S.G. Benner, D.W. Blowes, W.D. Gould, R.B. Herbert, and C.J. Ptacek, Geochemistry of a permeable reactive barrier for metals and acid mine drainage, Environ. Sci. Technol. 33 (1999), pp. 2793–2799. doi:10.1021/es981040u.
   Web of Science ®Google Scholar
• L. Li and C.H. Benson, Evaluation of five strategies to limit the impact of fouling in permeable reactive barriers, J. Hazard. Mater. 181 (2010), pp. 170–180. doi:10.1016/j.jhazmat.2010.04.113.
   PubMed Web of Science ®Google Scholar
• Y. Liu, H. Mou, L. Chen, Z.A. Mirza, and L. Liu, Cr(VI)-contaminated groundwater remediation with simulated permeable reactive barrier (PRB) filled with natural pyrite as reactive material: Environmental factors and effectiveness, J. Hazard. Mater. 298 (2015), pp. 83–90. doi:10.1016/j.jhazmat.2015.05.007.
   PubMed Web of Science ®Google Scholar
• K.R. Waybrant, D.W. Blowes, and C.J. Ptacek, Selection of reactive mixtures for use in permeable reactive walls for treatment of mine drainage, Environ. Sci. Technol. 32 (1998), pp. 1972–1979. doi:10.1021/es9703335.
   Web of Science ®Google Scholar
• O. Gibert, J.L. Cortina, J. de Pablo, and C. Ayora, Performance of a field-scale permeable reactive barrier based on organic substrate and zero-valent iron for in situ remediation of acid mine drainage, Environ. Sci. Pollut. Res. 20 (2013), pp. 7854–7862. doi:10.1007/s11356-013-1507-2.
   PubMed Web of Science ®Google Scholar
• J.J. Metesh, T. Jarrell, and S. Oravetz, Treating acid mine drainage from abandoned mines in remote areas, Tech. Rep. 9871-2821-MTDC, USDA Forest Service, Missoula Technology Development Center, Missoula, MT, 1998.
   Google Scholar
• A.E. Fryar and F.W. Schwartz, Hydraulic-conductivity reduction, reaction-front propagation, and preferential flow within a model reactive barrier, J. Contam. Hydrol. 32 (1998), pp. 333–351. doi:10.1016/S0169-7722(98)00057-6.
   Web of Science ®Google Scholar
• D.C. McMurtry and R.O. Elton, New approach to in-situ treatment of contaminated groundwaters, Environ. Prog. 4 (1985), pp. 168–170. doi:10.1002/ep.670040311.
   Google Scholar
• N. Moraci and P.S. Calabrò, Heavy metals removal and hydraulic performance in zero-valent iron/pumice permeable reactive barriers, J. Environ. Manage. 91 (2010), pp. 2336–2341. doi:10.1016/j.jenvman.2010.06.019.
   PubMed Web of Science ®Google Scholar
• S.J. Morrison and R.R. Spangler, Chemical barriers for controlling groundwater contamination, Environ. Prog. 12 (1993), pp. 175–181. doi:10.1002/ep.670120305.
   Google Scholar
• C. Fan and Y. Zhang, Adsorption isotherms, kinetics and thermodynamics of nitrate and phosphate in binary systems on a novel adsorbent derived from corn stalks, J. Geochem. Explor. 188 (2018), pp. 95–100. doi:10.1016/j.gexplo.2018.01.020.
   Web of Science ®Google Scholar
• M. Holub, M. Balintova, P. Pavlikova, and L. Palascakova, Study of sorption properties of zeolite in acidic conditions in dependence on particle size, Ital. Assoc. Chem. Eng. Trans. 32 (2013), pp. 559–564. doi:10.3303/CET1332094.
   Google Scholar
• S. Jain, B.P. Baruah, and P. Khare, Kinetic leaching of high sulphur mine rejects amended with biochar: Buffering implication, Ecol. Eng. 71 (2014), pp. 703–709. doi:10.1016/j.ecoleng.2014.08.003.
   Web of Science ®Google Scholar
• J. Lehmann, M.C. Rillig, J. Thies, C.A. Masiello, W.C. Hockaday, and D. Crowley, Biochar effects on soil biota – A review, Soil Biol. Biochem. 43 (2011), pp. 1812–1836. doi:10.1016/j.soilbio.2011.04.022.
   Web of Science ®Google Scholar
• T. Motsi, N.A. Rowson, and M.J.H. Simmons, Adsorption of heavy metals from acid mine drainage by natural zeolite, Int. J. Miner. Process. 92 (2009), pp. 42–48. doi:10.1016/j.minpro.2009.02.005.
   Web of Science ®Google Scholar
• X. Zhang, H. Wang, L. He, K. Lu, A. Sarmah, J. Li, et al., Using biochar for remediation of soils contaminated with heavy metals and organic pollutants, Environ. Sci. Pollut. Res. 20 (2013), pp. 8472–8483. doi:10.1007/s11356-013-1659-0.
   PubMed Web of Science ®Google Scholar
• F. Obiri-Nyarko, S.J. Grajales-Mesa, and G. Malina, An overview of permeable reactive barriers for in situ sustainable groundwater remediation, Chemosphere 111 (2014), pp. 243–259. doi:10.1016/j.chemosphere.2014.03.112.
   PubMed Web of Science ®Google Scholar
• R. Green, T.D. Waite, M.D. Melville, and B.C.T. Macdonald, Effectiveness of an open limestone channel in treating acid sulfate soil drainage, Water. Air. Soil Pollut. 191 (2008), pp. 293–304. doi:10.1007/s11270-008-9625-z.
   Web of Science ®Google Scholar
• J. Mertens, P. Vervaeke, E. Meers, and F.M.G. Tack, Seasonal changes of metals in willow (Salix sp.) stands for phytoremediation on dredged sediment, Environ. Sci. Technol. 40 (2006), pp. 1962–1968. doi:10.1021/es051225i.
   PubMed Web of Science ®Google Scholar
• C.A. Cravotta, Size and performance of anoxic limestone drains to neutralize acidic mine drainage, J. Environ. Qual. 32 (2003), pp. 1277–1289. doi:10.2134/jeq2003.1277.
   PubMed Web of Science ®Google Scholar
• A. Alcolea, M. Vázquez, A. Caparrós, I. Ibarra, C. García, R. Linares, and R. Rodríguez, Heavy metal removal of intermittent acid mine drainage with an open limestone channel, Miner. Eng. 26 (2012), pp. 86–98. doi:10.1016/j.mineng.2011.11.006.
   Web of Science ®Google Scholar
• O. Ouakibi, R. Hakkou, and M. Benzaazoua, Phosphate carbonated wastes used as drains for acidic mine drainage passive treatment, Procedia Eng. 83 (2014), pp. 407–414. doi:10.1016/j.proeng.2014.09.049.
   Google Scholar
• P.F. Ziemkiewicz, J.G. Skousen, D.L. Brant, P.L. Sterner, and R.J. Lovett, Acid mine drainage treatment with armored limestone in open limestone channels, J. Environ. Qual. 26 (1997), pp. 1017–1024. doi:10.2134/jeq1997.00472425002600040013x.
   Web of Science ®Google Scholar
• B. Gazea, K. Adam, and A. Kontopoulos, A review of passive systems for the treatment of acid mine drainage, Miner. Eng. 9 (1996), pp. 23–42. doi:10.1016/0892-6875(95)00129-8.
   Web of Science ®Google Scholar
• E.I. Robbins, C.A. Cravotta, C.E. Savela, and G.L. Nord, Hydrobiogeochemical interactions in `anoxic’ limestone drains for neutralization of acidic mine drainage, Fuel 78 (1999), pp. 259–270. doi:10.1016/S0016-2361(98)00147-1.
   Web of Science ®Google Scholar
• F.M. Kusin, A. Aris, A. Shayeeda, and A. Misbah, A comparative study of anoxic limestone drain and open limestone channel for acidic raw water treatment, Int. J. Eng. Technol. 13(6) (2013), pp. 87–92. 133906-8686-IJET-IJENS.
   Google Scholar
• G.R. Watzlaf, K.T. Schroeder, and C.L. Kairies, Long-term performance of anoxic limestone drains, Mine Water Environ. 19 (2000), pp. 98–110. doi:10.1007/BF02687258.
   Google Scholar
• C.E. Zipper and J.G. Skousen, Influent water quality affects performance of passive treatment systems for acid mine drainage, Mine Water Environ. 29 (2010), pp. 135–143. doi:10.1007/s10230-010-0101-9.
   Web of Science ®Google Scholar
• E.R. Goetz and R.G. Riefler, Performance of steel slag leach beds in acid mine drainage treatment, Chem. Eng. J. 240 (2014), pp. 579–588. doi:10.1016/j.cej.2013.10.080.
   Web of Science ®Google Scholar
• I.Z. Yildirim and M. Prezzi, Chemical, mineralogical, and morphological properties of steel slag, Adv. Civ. Eng. (2011), pp. 1–13. doi:10.1155/2011/463638.
   Google Scholar
• D.S. Kumar, M.R.B.S. Subramanya, and S.M.R. Prasad, Slags aggregates for roads and civil constructions, National Seminar on New Developments in Alternative Use of Materials, AMCON, Nagpur, India, 2015.
   Google Scholar
• S.D. Cunningham, W.R. Berti, and J.W. Huang, Phytoremediation of contaminated soils, Trends Biotechnol. 13 (1995), pp. 393–397. doi:10.1016/S0167-7799(00)88987-8.
   Web of Science ®Google Scholar
• H. Deng, Z.H. Ye, and M.H. Wong, Lead and zinc accumulation and tolerance in populations of six wetland plants, Environ. Pollut. 141 (2006), pp. 69–80. doi:10.1016/j.envpol.2005.08.015.
   PubMed Web of Science ®Google Scholar
• A.D. Karathanasis and C.M. Johnson, Metal removal potential by three aquatic plants in an acid mine drainage wetland, Mine Water Environ. 22 (2003), pp. 22–30. doi:10.1007/s102300300004.
   Google Scholar
• M. Roy, R. Roychowdhury, P. Mukherjee, A. Roy, B. Nayak, and S. Roy, Phytoreclamation of abandoned acid mine drainage site after treatment with fly ash, in Coal Fly Ash Beneficiation - Treatment of Acid Mine Drainage with Coal Fly Ash, R. Roychowdhury, ed., IntechOpen, Rijeka, 2018, pp. 111–118. doi:10.5772/intechopen.69527.
   Google Scholar
• C. Garbisu and I. Alkorta, Phytoextraction: A cost-effective plant-based technology for the removal of metals from the environment, Bioresour. Technol. 77 (2001), pp. 229–236. doi:10.1016/S0960-8524(00)00108-5.
   PubMed Web of Science ®Google Scholar
• M. Del Rı́o, R. Font, C. Almela, D. Vélez, R. Montoro, and A. De Haro Bailón, Heavy metals and arsenic uptake by wild vegetation in the Guadiamar river area after the toxic spill of the Aznalcóllar mine, J. Biotechnol. 98 (2002), pp. 125–137. doi:10.1016/S0168-1656(02)00091-3.
   PubMed Web of Science ®Google Scholar
• W. Gwenzi, C.C. Mushaike, N. Chaukura, and T. Bunhu, Removal of trace metals from acid mine drainage using a sequential combination of coal ash-based adsorbents and phytoremediation by bunchgrass (Vetiver [Vetiveria zizanioides L]), Mine Water Environ. 36 (2017), pp. 520–531. doi:10.1007/s10230-017-0439-3.
   Web of Science ®Google Scholar
• M.M. Lasat, Phytoextraction of metals from contaminated soil: A review of plant/soil/metal interaction and assessment of pertinent agronomic issues, J. Hazard. Subst. Res. 2 (1999), pp. 109–120. doi:10.4148/1090-7025.1015.
   Google Scholar
• M.O. Mendez and R.M. Maier, Phytoremediation of mine tailings in temperate and arid environments, Rev. Environ. Sci. Biotechnol. 7 (2008), pp. 47–59. doi:10.1007/s11157-007-9125-4.
   Google Scholar
• B.Pivetz, Phytoremediation of contaminated soil and ground water at hazardous waste sites, in groundwater, Issue, Tech. Rep. EPA/540/S-01/500, United States Environmental Protection Agency, 2001. Available at https://www.epa.gov/sites/production/files/201506/documents/epa_540_s01_500.pdf.
   Google Scholar
• J.S. Weis and P. Weis, Metal uptake, transport and release by wetland plants: Implications for phytoremediation and restoration, Environ. Int. 30 (2004), pp. 685–700. doi:10.1016/j.envint.2003.11.002.
   PubMed Web of Science ®Google Scholar
• G.J. Zagury, C. Neculita, and B. Bussière, Passive treatment of acid mine drainage in bioreactors: Critical review and research needs, J. Environ. Qual. 36 (2007), pp. 1–16. doi:10.2134/jeq2006.0066.
   Google Scholar
• O. Gibert, J. de Pablo, J.L. Cortina, and C. Ayora, Sorption studies of Zn(II) and Cu(II) onto vegetal compost used on reactive mixtures for in situ treatment of acid mine drainage, Water Res. 39 (2005), pp. 2827–2838. doi:10.1016/j.watres.2005.04.056.
   PubMed Web of Science ®Google Scholar
• A. Janin and J. Harrington, Passive treatment of mine drainage waters: The use of biochars and wood products to enhance metal removal efficiency, Proceedings 2013 Northern Latitudes Mining Reclamation Workshop and 38th Annual Meeting of the Canadian Land Reclamation Association Overcoming Northern Challenge, Whitehorse, Yukon, September 9–12, 2013, pp. 90–99.
   Google Scholar
• T.D. Brock and M.T. Madigan, Biology of Microorganisms, 6th ed., Prentice Hall, Englewood Cliffs, New Jersey, 1995.
   Google Scholar
• E.C.M. Kwong, Abiotic and biotic pyrrhotite dissolution, MASc Thesis, University of Waterloo, 1995.
   Google Scholar
• B. Lottermoser, Mine Wates: Characterization, Treatment and Environmental Impacts, 3rd ed., Springer Science & Business Media, London, 2010.
   Google Scholar
• D. Wagner, Microbial communities and processes in arctic permafrost environments, in Microbiology of Extreme Soils (Soil Biology), P. Dion and C. S. Nautiyal, eds., Vol. 13, Springer, Berlin/Heidelberg, 2008, pp. 133–154.
   Google Scholar
• Y. Yang, M. Wan, W. Shi, H. Peng, G. Qiu, J. Zhou, et al., Bacterial diversity and community structure in acid mine drainage from Dabaoshan Mine, China, Aquat. Microbiol. Ecol. 47 (2007), pp. 141–151. doi:10.3354/ame047141.
   Web of Science ®Google Scholar
• C.S. Kirby and C.A. Cravotta, Net alkalinity and net acidity 2: Practical considerations, Appl. Geochem. 20 (2005), pp. 1941–1964. doi:10.1016/j.apgeochem.2005.07.003.
   Web of Science ®Google Scholar
• N.A. Kruse, A.L. Mackey, J.R. Bowman, K. Brewster, and R.G. Riefler, Alkalinity production as an indicator of failure in steel slag leach beds treating acid mine drainage, Environ. Earth Sci. 67 (2012), pp. 1389–1395. doi:10.1007/s12665-012-1583-5.
   Web of Science ®Google Scholar
• S. Santomartino and J.A. Webb, Estimating the longevity of limestone drains in treating acid mine drainage containing high concentrations of iron, Appl. Geochem. 22 (2007), pp. 2344–2361. doi:10.1016/j.apgeochem.2007.04.020.
   Web of Science ®Google Scholar
• T.R. Lee and R.T. Wilkin, Iron hydroxy carbonate formation in zerovalent iron permeable reactive barriers: Characterization and evaluation of phase stability, J. Contam. Hydrol. 116 (2010), pp. 47–57. doi:10.1016/j.jconhyd.2010.05.009.
   PubMed Web of Science ®Google Scholar
• B.J. Baker and J.F. Banfield, Microbial communities in acid mine drainage, FEMS Microbiol. Ecol. 44 (2003), pp. pp. 139–152. doi:10.1016/S0168-6496(03)00028-X.
   PubMed Web of Science ®Google Scholar
• J. Skousen and P. Ziemkiewicz, Performance of 116 passive treatment systems for acid mine drainage, National Meeting of the American Society of Mining and Reclamation, Breckenridge, CO, 2005.
   Google Scholar
• M. Christ, Operation and maintenance of passive acid mine drainage treatment systems: A framework for watershed groups, Tech. Rep.Division of Water and Waste Management, Nonpoint Source Program, West Virginia Department of Environmental Protection, Charleston, West Viriginia, 2014.
   Google Scholar
• J. Bolzicco, C. Ayora, T. Rötting, and J. Carrera, Performance of the Aznalcóllar permeable reactive barrier, Mine Water Environ., at 8th International Mine Water Conference, Johannesburg, 2003, pp. 287–299.
   Google Scholar
• C. Woulds and B.T. Ngwenya, Geochemical processes governing the performance of a constructed wetland treating acid mine drainage, Central Scotland, Appl. Geochem. 19 (2004), pp. 1773–1783. doi:10.1016/j.apgeochem.2004.04.002.
   Web of Science ®Google Scholar
• C.D. Barton and A.D. Karathanasis, Renovation of a failed constructed wetland treating acid mine drainage, Environ. Geol. 39 (1999), pp. 39–50. doi:10.1007/s002540050435.
   Web of Science ®Google Scholar