| Records |
Author  |
Younger, P.L.; Banwart, S.A. |
| Title |
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Type |
Book Whole |
| Year |
2001 |
Publication |
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Abbreviated Journal |
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| Volume |
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Issue |
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Pages |
419-421 |
| Keywords |
mine water |
| Abstract |
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Preprints volume Conference 'Groundwater Quality 2001' (Third International Conference on Groundwater Quality, International Association of Hydrological Sciences) |
Place of Publication |
Sheffield |
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Series Title |
Time-scale issues in the remediation of pervasively contaminated groundwaters at abandoned mines sites |
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| Notes |
Time-scale issues in the remediation of pervasively contaminated groundwaters at abandoned mines sites; AMD ISI | Wolkersdorfer |
Approved |
no |
| Call Number |
CBU @ c.wolke @ 17629 |
Serial |
197 |
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| Author |
Younger, P.L. |
| Title |
Passive in situ remediation of acidic mine waste leachates: progress and prospects |
Type |
Journal Article |
| Year |
2003 |
Publication |
Land Reclamation: Extending the Boundaries |
Abbreviated Journal |
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| Volume |
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Issue |
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Pages |
253-264 |
| Keywords |
mine water treatment |
| Abstract |
The reclamation of former mining sites is a major challenge in many parts of the world. In relation to the restoration of spoil heaps (mine waste rock piles) and similar bodies of opencast backfill, key challenges include (i) the establishment of stable slopes and minimization of other geotechnical hazards (ii) developing and maintaining a healthy vegetative cover (iii) managing the hydrological behaviour of the restored ground. Significant advances have been made over the past four decades in relation to all four of these objectives. One of the most recalcitrant problems is the ongoing generation and release of acidic leachates, which typically emerge at the toes of (otherwise restored) spoil heaps in the form of springs and seepage areas. Such features are testament to the presence of a “perched” groundwater circulation system within the spoil, and their acidity reflects the continued penetration of oxygen to zones within the heaps which contain reactive pyrite (and other iron sulphide minerals). Two obvious strategies for dealing with this problem are disruption of the perched groundwater system and/or exclusion of oxygen entry. These strategies are now being pursued with considerable success where spoil is being reclaimed for the first time, by the installation of two types of physical barrier (dry covers and water covers). However, where a spoil heap has already been revegetated some decades ago, the destruction of an established sward or woodland in order to retro-fit a dry cover or water cover is rarely an attractive option for dealing with the “secondary dereliction” represented by ongoing toe seepages of acidic leachates. More attractive by far are passive treatment techniques, in which the polluted water is forced to flow through reactive media which serve to neutralize its acidity and remove toxic metals from solution. A brief historical review of the development of such systems reveals a general progression from using limestone as the key neutralizing agent, through a combined use of limestone and compost, to systems in which almost all of the neutralization is achieved by means of bacterial sulphate reduction in the saturated compost media of subsurface-flow bioreactors. In almost all cases, these passive treatment systems include an aerobic, surface flow wetland as the final “polishing” step in the treatment process. Such wetlands combine treatment functions (efficient removal of metals from the now-neutralized waters down to low residual concentrations, and re-oxygenating the water prior to discharge to receiving watercourses) with amenity value (attractive areas for recreational walking, bird-watching etc) and ecological value. |
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Passive in situ remediation of acidic mine waste leachates: progress and prospects; Isip:000183447100035; Times Cited: 0; ISI Web of Science |
Approved |
no |
| Call Number |
CBU @ c.wolke @ 17016 |
Serial |
158 |
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| Author |
Younger, P.L. |
| Title |
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Type |
Book Whole |
| Year |
1998 |
Publication |
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Abbreviated Journal |
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| Volume |
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Issue |
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Pages |
413-424 |
| Keywords |
wetlands mine water |
| Abstract |
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Proceedings International Mine Water Association Symposium |
Place of Publication |
2 |
Editor |
Nel Petrus Johannes, L. |
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Series Title |
Mine Water and Environmental Impacts |
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ISBN |
062-02294-0-3 |
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Design, construction and initial operation of full-scale compost-based passive systems for treatment of coal mine drainage and spoil leachate in the UK; 1; AMD ISI | Wolkersdorfer; Aj |
Approved |
no |
| Call Number |
CBU @ c.wolke @ 9976 |
Serial |
199 |
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| Author |
Ye, Z.H. |
| Title |
Removal and distribution of iron, manganese, cobalt, and nickel within a Pennsylvania constructed wetland treating coal combustion by-product leachate |
Type |
Journal Article |
| Year |
2001 |
Publication |
Journal of Environmental Quality |
Abbreviated Journal |
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| Volume |
30 |
Issue |
4 |
Pages |
1464-1473 |
| Keywords |
mine water treatment |
| Abstract |
A flow-through wetland treatment system was constructed to treat coal combustion by-product leachate from an electrical power station at Springdale, Pennsylvania. In a nine-compartment treatment system, four cattail (Typha latifolia L.) wetland cells (designated Cells I through 4) successfully removed iron (Fe) and manganese (Mn) from the inlet water; Fe and Mn concentrations were decreased by an average of 91% in the first year (May 1996-May 1997), and by 94 and 98% in the second year (July 1997-June 1998), respectively. Cobalt (Co) and nickel (Ni) were decreased by an average of 39 and 47% in the first year, and 98 and 63% in the second year, respectively. Most of the metal removed by the wetland cells was accumulated in sediments, which constituted the largest sink. Except for Fe, metal concentrations in the sediments tended to be greater in the top 5 em of sediment than in the 5- to 10- or 10- to 15-cm layers, and in Cell I than in Cells 2, 3, and 4. Plants constituted a much smaller sink for metals; only 0.91, 4.18, 0.19, and 0.38% of the Fe, Mn, Co, and Ni were accumulated annually in the aboveground tissues of cattail, respectively. A greater proportion of each metal (except Mn) was accumulated in cattail fallen litter and submerged Chara (a macroalga) tissues, that is, 2.81, 2.75, and 1.05% for Fe, Co, and Ni, respectively. Considerably higher concentrations of metals were associated with cattail roots than shoots, although Mn was a notable exception. |
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Removal and distribution of iron, manganese, cobalt, and nickel within a Pennsylvania constructed wetland treating coal combustion by-product leachate; Wos:000174863000040; Times Cited: 15; ISI Web of Science |
Approved |
no |
| Call Number |
CBU @ c.wolke @ 17061 |
Serial |
122 |
| Permanent link to this record |
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| Author |
Ye, Z.H. |
| Title |
Use of a wetland system for treating Pb/Zn mine effluent: A case study in southern China from 1984 to 2002 |
Type |
Journal Article |
| Year |
2004 |
Publication |
Wetlands Ecosystems in Asia: Function and Management |
Abbreviated Journal |
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| Volume |
1 |
Issue |
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Pages |
413-434 |
| Keywords |
mine water treatment |
| Abstract |
A constructed wetland system in Guangdong Province, South of China has been used for treating Pb/Zn mine discharge since 1984. In this chapter, the performance of this system in the purification of mine discharge, metal accumulation in different ecological compartments and ecological succession within the system during the period of 1984-2002 has been reviewed. The data show that the wetland system not only effectively remove metals (mainly Pb, Zn, Cd and Cu) and total suspended solids from the mine discharge over a long period leading to significant improvement in water quality, but also gradually increase diversity and abundance of living organisms. |
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Use of a wetland system for treating Pb/Zn mine effluent: A case study in southern China from 1984 to 2002; Isip:000226088800023; Times Cited: 0; ISI Web of Science |
Approved |
no |
| Call Number |
CBU @ c.wolke @ 16997 |
Serial |
155 |
| Permanent link to this record |
