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Bliss, L.N.; Sellstone, C.M.; Nicholson, A.D.; Kempton, J.H. |
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Buffering of acid rock drainage by silicate minerals |
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1997 |
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acid mine drainage; buffers; chemical reactions; decontamination; environmental analysis; geochemistry; pH; pollution; remediation; silicates; sulfate ion; USGS 22 Environmental geology; 02A General geochemistry |
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Open-File Report - U. S. Geological Survey, Report: OF 97-0496 |
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4th International symposium on Environmental geochemistry; proceedings |
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1998-068723; 4th International symposium on Environmental geochemistry, Vail, CO, United States, Oct. 5-10, 1997 U. S. Geol. Surv., Denver, CO, United States; GeoRef; English |
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CBU @ c.wolke @ 6286 |
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446 |
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Author |
Fricke, J.; Blickwedel, R.; Hagerty, P. |
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Title |
Biotreatment of metal mine waste waters; case histories |
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Journal Article |
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1997 |
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Open-File Report – US Geological Survey |
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Of 97-0496 |
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25 |
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abandoned mines acid mine drainage bacteria bioremediation chemical composition concentration efficiency geochemistry metals mines pollution remediation USGS waste water water quality water treatment |
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0196-1497 |
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Biotreatment of metal mine waste waters; case histories; 1; GeoRef: 98-68755 160101 / € 0; AMD ISI | Wolkersdorfer |
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CBU @ c.wolke @ 9627 |
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375 |
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Author |
Becker, B.; Graff, M.; Näveke, R. |
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Title |
Biological Treatment of Overburden from Lignite Opencast Mining in Order to Avoid Seepage of Acid Mine Water |
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Journal Article |
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1997 |
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Proceedings, 6th International Mine Water Association Congress, Bled, Slovenia |
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2 |
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283-291 |
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coal mining mine water acid mine water Germany treatment laboratory studies |
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Biological Treatment of Overburden from Lignite Opencast Mining in Order to Avoid Seepage of Acid Mine Water; 1; FG 6 Abb.; AMD ISI | Wolkersdorfer |
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CBU @ c.wolke @ 9527 |
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460 |
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Barton, C.D.; Karathanasis, A.D. |
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Title |
Aerobic and anaerobic metal attenuation processes in a constructed wetland treating acid mine drainage |
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1997 |
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AAPG Eastern Section and the Society for Organic Petrology joint meeting; abstracts |
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1545 |
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acid mine drainage aerobic environment air-water interface anaerobic environment attenuation buffers constructed wetlands controls diffusion iron manganese metals mineral composition pollution precipitation processes SEM data solubility solution sulfate ion sulfur wetlands X-ray diffraction data 22, Environmental geology |
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The use of constructed wetlands for acid mine drainage amelioration has become a popular alternative to conventional treatment methods, however, the metal attenuation processes of these systems are poorly understood. Precipitates from biotic and abiotic zones of a staged constructed wetland treating high metal load (approx. equal to 1000 mg L (super -1) ) and low pH (approx. 3.0) acid mine drainage were characterized by chemical dissolution, x-ray diffraction, thermal analysis and scanning electron microscopy. Characterization of abiotic/aerobic zones within the treatment system suggest the presence of crystalline iron oxides and hydroxides such as hematite, lepidocrocite, goethite, and jarosite. At the air/water interface of initial abiotic treatment zones, SO (sub 4) /Fe ratios were low enough (<2.0) for the formation of jarosite and goethite, but as the ratio increased due to treatment and subsequent reductions in iron concentration, jarosite was transformed to other Fe-oxyhydroxysulfates and goethite formation was inhibited. In addition, elevated pH conditions occurring in the later stages of treatment promoted the formation of amorphous iron oxyhydroxides. Biotic wetland cell substrate characterizations suggest the presence of amorphous iron minerals such as ferrihydrite and Fe(OH) (sub 3) . Apparently, high Fe (super 3+) activity, low Eh and low oxygen diffusion rates in the anaerobic subsurface environment inhibit the kinetics of crystalline iron precipitation. Some goethite, lepidocrocite and hematite, however, were observed near the surface in biotic areas and are most likely attributable to increased oxygen levels from surface aeration and/or oxygen transport by plant roots. Alkalinity generation from limestone dissolution within the substrate and bacterially mediated sulfate reduction also has a significant role on the mineral retention process. The formation of gypsum, rhodochrocite and siderite are by-products of alkalinity generating reactions in this system and may have an impact on S, Mn, and Fe solubility controls. Moreover, the buffering of acidity through excess alkalinity appears to facilitate the precipitation and retention of metals within the system. |
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AAPG Bulletin |
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Aerobic and anaerobic metal attenuation processes in a constructed wetland treating acid mine drainage; GeoRef; English; 1997-067790; AAPG Eastern Section and the Society for Organic Petrology joint meeting, Lexington, KY, United States, Sep. 27-30, 1997 |
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Call Number |
CBU @ c.wolke @ 16630 |
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70 |
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Author |
Bowell, R.J.; Connelly, R.J.; Ellis, J.; Cowan, J.; Wood, A.; Barta, J.; Edwards, P. |
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Title |
A review of sulfate removal options from mine waters |
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Journal Article |
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1997 |
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Keywords |
acid mine drainage; bacteria; bioremediation; decontamination; effluents; ground water; legislation; osmosis; oxidation; pollutants; pollution; remediation; reverse osmosis; selenites; sulfate ion; toxic materials; USGS; water treatment 22 Environmental geology; 02A General geochemistry |
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Open-File Report - U. S. Geological Survey, Report: OF 97-0496 |
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Series Title |
4th International symposium on Environmental geochemistry; proceedings |
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Notes |
1998-068727; 4th International symposium on Environmental geochemistry, Vail, CO, United States, Oct. 5-10, 1997 U. S. Geol. Surv., Denver, CO, United States; GeoRef; English |
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Call Number |
CBU @ c.wolke @ 6287 |
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438 |
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