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Barton, C.D. |
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Title |
Renovation of a failed constructed wetland treating acid mine drainage |
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Year |
1999 |
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Environmental Geology |
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39 |
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1 |
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39-50 |
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mine water treatment |
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Abstract |
Acid mine drainage (AMD) from abandoned underground mines significantly impairs water quality in the Tones Branch watershed in McCreary Co., Kentucky, USA. A 1022-m(2) surface-flow wetland was constructed in 1989 to reduce the I AMD effects, however, the system failed after six months due to insufficient utilization of the treatment area, inadequate alkalinity production and metal overloading. In an attempt to improve treatment efficiencies, a renovation project was designed incorporating two anoxic limestone drains (ALDs) and a series of anaerobic subsurface drains that promote vertical now or mine water through a successive alkalinity producing system (SAPS) of limestone beds overlain by organic compost. Analytical results from the 19-month post-renovation period are very encouraging. Mean iron concentrations have decreased from 787 to 39 mg l(-1), pH increased from 3.38 to 6.46 and acidity has been reduced from 2244 to 199 mg l(-1) (CaCO3 equivalent). Mass removal rates averaged 98% for Al, 95% for Fe, 94% for acidity, 55% for sulfate and 49% for Mn during the study period. The results indicate increased alkalinity production from limestone dissolution and longer residence time have contributed to sufficient buffering and metal retention. The combination of ALDs and SAPS technologies used in the renovation and the sequence in which they were implemented within the wetland system proved to be an adequate and very promising design for the treatment of this and other sources of high metal load AMD. |
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Renovation of a failed constructed wetland treating acid mine drainage; Wos:000084081400004; Times Cited: 5; ISI Web of Science |
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CBU @ c.wolke @ 17114 |
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129 |
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O'Sullivan, A.D.; McCabe, O.M.; Murray, D.A.; Otte, M.L. |
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Title |
Wetlands for rehabilitation of metal mine wastes |
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Journal Article |
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1999 |
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Biology and Environment-Proceedings of the Royal Irish Academy |
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99b |
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1 |
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11-17 |
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mine water treatment |
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Abstract |
Aspects of research work undertaken by the Wetland Ecology Research Group at University College Dublin are summarised here. Wastes from mining activities generally contain high concentrations of heavy metals and other toxic substances. Reclamation methods to treat these wastes include the use of wetlands, for revegetation of mine tailings under flooded conditions and for the treatment of tailings water. Both natural and constructed wetlands are frequently employed for the treatment of mine wastes. Through a complex array of plant, soil and microbial interactions contaminants, such as heavy metals and sulphates, can be successfully removed from wastewater. Suitable vegetation can stabilise the tailings sediment, thereby preventing it from being dust-blown or leached into the surrounding environment. Our research suggests that these two techniques for treatment of mine wastes are successful and economically viable. |
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Wetlands for rehabilitation of metal mine wastes; Wos:000083281300003; Times Cited: 4; ISI Web of Science |
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CBU @ c.wolke @ 17127 |
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130 |
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Author |
Benner, S.G. |
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Title |
Geochemistry of a permeable reactive barrier for metals and acid mine drainage |
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Journal Article |
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1999 |
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Environmental Science & Technology |
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33 |
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16 |
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2793-2799 |
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mine water treatment |
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A permeable reactive barrier, designed to remove metals and generate alkalinity by promoting sulfate reduction and metal sulfide precipitation, was installed in August 1995 into an aquifer containing effluent from mine tailings. Passage of groundwater through the barrier results in striking improvement in water quality. Dramatic changes in concentrations of SO4 (decrease of 2000-3000 mg/L), Fe (decrease of 270-1300 mg/L), trace metals (e.g., Ni decreases 30 mg/L), and alkalinity (increase of (800-2700 mg/L) are observed. Populations of sulfate reducing bacteria are 10 000 times greater, and bacterial activity, as measured by dehydrogenase activity, is 10 rimes higher within the barrier compared to the up-gradient aquifer. Dissolved sulfide concentrations increase by 0.2-120 mg/ L, and the isotope S-34 is enriched relative to S-32 in the dissolved phase SO42- within the barrier. Water chemistry, coupled with geochemical speciation modeling, indicates the pore water in the barrier becomes supersaturated with respect to amorphous Fe sulfide. Solid phase analysis of the reactive mixture indicates the accumulation of Fe monosulfide precipitates. Shifts in the saturation states of carbonate, sulfate, and sulfide minerals and most of the observed changes in water chemistry in the barrier and down-gradient aquifer can be attributed, either directly or indirectly, to bacterially mediated sulfate reduction. |
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Geochemistry of a permeable reactive barrier for metals and acid mine drainage; Wos:000082074500017; Times Cited: 57; ISI Web of Science |
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Call Number |
CBU @ c.wolke @ 17115 |
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132 |
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Author |
Wiessner, A. |
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Title |
The treatment of a deposited lignite pyrolysis wastewater by adsorption using activated carbon and activated coke |
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1998 |
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Colloids and Surfaces a-Physicochemical and Engineering Aspects |
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139 |
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1 |
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91-97 |
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mine water treatment |
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To study the functions of activated carbon and activated coke adsorption for the treatment of highly contaminated discolored industrial wastewater with a wide molecular size distribution of organic compounds, the deposited lignite pyrolysis wastewater from a filled open-cast coal mine was used for continuous and discontinuous experiments. |
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The treatment of a deposited lignite pyrolysis wastewater by adsorption using activated carbon and activated coke; Wos:000074411100012; Times Cited: 1; ISI Web of Science |
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CBU @ c.wolke @ 17147 |
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133 |
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Author |
Bertrand, S. |
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Title |
Performance of a nanofiltration plant on hard and highly sulphated water during two years of operation |
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Year |
1997 |
Publication |
Desalination |
Abbreviated Journal |
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113 |
Issue |
2-3 |
Pages |
277-281 |
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Keywords |
mine water treatment |
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A highly sulphated, hard water from a flooded iron mine was treated by nanofiltration for the production of drinking water (125 m(3)/h). This paper introduces the context and summarizes the configuration and operating conditions of the plant. The process performance in terms of product water quality and permeability during the first 2 years is presented and discussed. |
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Performance of a nanofiltration plant on hard and highly sulphated water during two years of operation; Wos:000071218200023; Times Cited: 5; ISI Web of Science |
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CBU @ c.wolke @ 17153 |
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134 |
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