Records |
Author |
Barton, C.D.; Karathanasis, A.D. |
Title |
Aerobic and anaerobic metal attenuation processes in a constructed wetland treating acid mine drainage |
Type |
Journal Article |
Year |
1998 |
Publication |
Environ Geosci |
Abbreviated Journal |
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Volume |
5 |
Issue |
2 |
Pages |
43-56 |
Keywords |
acid mine drainage aerobic environment anaerobic environment attenuation chemical fractionation chemical properties concentration constructed wetlands controls degradation detection environmental analysis ferric iron goethite heavy metals iron jarosite Kentucky McCreary County Kentucky metals oxides pollutants pollution seepage soils solubility sulfates surface water United States water treatment wetlands X-ray diffraction data 22, Environmental geology |
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ISSN |
1075-9565 |
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Aerobic and anaerobic metal attenuation processes in a constructed wetland treating acid mine drainage; 2001-034195; References: 41; illus. incl. 1 table United States (USA); GeoRef; English |
Approved |
no |
Call Number |
CBU @ c.wolke @ 16623 |
Serial |
61 |
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Author |
Barton, C.D.; Karathanasis, A.D. |
Title |
Aerobic and anaerobic metal attenuation processes in a constructed wetland treating acid mine drainage |
Type |
Book Chapter |
Year |
1997 |
Publication |
AAPG Eastern Section and the Society for Organic Petrology joint meeting; abstracts |
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Volume |
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Issue |
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Pages |
1545 |
Keywords |
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 |
Abstract |
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 |
Place of Publication |
81 |
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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 |
Approved |
no |
Call Number |
CBU @ c.wolke @ 16630 |
Serial |
70 |
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Author |
Karathanasis, A.D.; Barton, C.D. |
Title |
The revival of a failed constructed wetland treating a high Fe load AMD |
Type |
Book Chapter |
Year |
1999 |
Publication |
Proceedings; biogeochemistry of trace elements in coal and coal combustion byproducts |
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Issue |
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Pages |
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Keywords |
abandoned mines acid mine drainage anaerobic environment carbonate rocks characterization composting constructed wetlands design environmental analysis ferrihydrite geologic hazards hydrology hydroxides iron iron hydroxides Kentucky limestone metals minerals mines organic compounds oxides pollution remediation runoff sedimentary rocks sediments solubility sulfate ion United States water quality water treatment wetlands 22, Environmental geology |
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Kluwer Academic/Plenum Publishers |
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New York |
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Sajwan, K.S.; Alva, A.K.; Keefer, R.F. |
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0306462885 |
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Notes |
The revival of a failed constructed wetland treating a high Fe load AMD; GeoRef; English; 2002-039561; Fourth international conference on the Biogeochemistry of trace elements, Berkeley, CA, United States, June 23, 1997 References: 45; illus. incl. 2 tables, sketch maps |
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no |
Call Number |
CBU @ c.wolke @ 16571 |
Serial |
82 |
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Author |
Anonymous; Unten, L.; Wildeman, T.R.; Gusek, J.J. |
Title |
Passive treatment for contaminants in mine waters Effluent treatment in the mining industry |
Type |
Book Chapter |
Year |
1998 |
Publication |
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Abbreviated Journal |
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Volume |
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Issue |
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Pages |
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Keywords |
acid mine drainage; alkalinity; biodegradation; chemical reactions; coal mines; constructed wetlands; controls; degradation; heavy metals; ions; kinetics; metal ores; mines; mitigation; oxidation; pH; pollution; polymetallic ores; remediation; solubility; sulfate ion; sulfides; waste disposal; wetlands 22, Environmental geology |
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University of Concepcion |
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Concepcion |
Editor |
Castro, S.H.; Vergara, F.; Sanchez, M.A. |
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University of Concepcion, D. of M.E.C.C. |
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9562271560 |
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Passive treatment for contaminants in mine waters Effluent treatment in the mining industry; GeoRef; English; 2002-047084; References: 59; illus. incl. 3 tables |
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CBU @ c.wolke @ 6215 |
Serial |
477 |
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