Assessment, prediction and management of long-term post-closure water quality: a case study — Hlobane Colliery, South Africa

Hattingh, Raina; Pulles, W.; Krantz, R.; Pretorius, C.; Swart, Susan

doi:10.1144/gsl.sp.2002.198.01.20

Cited by 4 publications

(4 citation statements)

References 6 publications

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“…También es necesario evaluar los impactos potenciales sobre la calidad de las aguas subterráneas regionales y los riesgos a largo plazode la calidad del agua en cuerpos hídricos aguas abajo de la mina después del cierre. Un ejemplo de los efectos de diversas acciones de gestión del agua al respecto y un caso de estudio son analizadas por Hattingh et al (2002).…”

Section: Buenas Prácticasunclassified

Buenas prácticas para el uso del agua en la industria minera de México

Rabadán¹,

Reyes²,

Carretero³

2021

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La industria minera metalúrgica en México contribuye con el 8.2 % del Producto Interno Bruto (PIB) industrial y el 2.4 % del PIB nacional (Inegi, 2018). Esta riqueza, sin embargo, tiene costos sociales y ambientales en los sitios donde se desarrolla. Una empresa sin responsabilidad sobre los impactos que genera compromete su credibilidad, prestigio y apoyo por parte de las autoridades, los mercados y la sociedad civil, los cuales son cada vez más exigentes en la implementación de medidas para la protección del medio ambiente. El presente trabajo es un primer ejercicio para orientar la gestión responsable de los recursos hídricos dentro de una unidad minera y reducir el impacto de sus emisiones residuales al medio ambiente.

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Section: Buenas Prácticasunclassified

Buenas prácticas para el uso del agua en la industria minera de México

Rabadán¹,

Reyes²,

Carretero³

2021

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“…Gandy & Evans 2002). Full-scale application of kinetic geochemical modelling to the derivation of management plans for real problem sites remains a state-of-the-art venture, which has so far been attempted in very few recorded instances: a good early example is provided by Hattingh et al (2002).…”

Section: Towards Robust Management Strategiesmentioning

confidence: 99%

“…Banwart & Malmstr6m 2001;Banwart et al 2002;Loredo et al 2002). At the other extreme, attempts have been made to numerically model the generation and multispecies transport of acid mine waters and spoil leachates through both the source bodies of mine waste rock (Gandy & Evans 2002;Hattingh et al 2002) and in the aquifers infiltrated by such leachates (Saaltink et al 2002). Such efforts have revealed the persistence of the following problems, which serve as barriers to further advances in predictive geochemical modelling: 9 Lack of information on the nature and kinetics of several key sink-source reactions for the major mine water pollutant species (e.g.…”

Section: Geochemical Uncertainties and Challengesmentioning

confidence: 99%

“…However, the same cannot truly be stated for flooded or partially flooded deep mines (e.g. Hattingh et al 2002;Nuttall et al 2002), and significant progress in this regard is unlikely to be made before a wider range of comprehensive hydrogeochemical data-sets have been acquired for representative mine systems (along the lines of those presented by Nuttall et al 2002;and Hattingh et aI. 2002) and analysed using inverse geochemical modelling techniques.…”

Section: Geochemical Uncertainties and Challengesmentioning

confidence: 99%

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Challenges in the characterization and prediction of the hydrogeology and geochemistry of mined ground

Younger

Robins

2002

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Although mining is no longer a key industry in the UK, the international mining industry continues to expand. One of the principal legacies of past mining in Britain is water pollution emanating from abandoned mine voids and waste rock depositories. This has necessitated many expensive technical evaluations and remedial programmes in recent years, from which important lessons may be drawn for the still-growing mining industry overseas. Perhaps the single most important lesson is that there can never be too much information on mine hydrogeology and geochemistry available at the post-closure phase. As this phase is also the longest in the overall life cycle of any mine, it should be given appropriate consideration from the outset. The post-closure studies described in this paper and in this volume (as well as elsewhere) highlight the dearth of hydrological data that are usually available when compared with the wealth of geometric information available from mine abandonment plans. It is advocated that the collection of appropriate environmental data is built into the initial mine development plan and that monitoring commences from the green field site onwards. The uncertainties related to predictive modelling of mine water arisings are considerable, whilst those of predicting mine water quality are even greater. Numerous pointers towards robust mine water management strategies are identified, and a call for 'defensive mine planning' is made, in which relatively modest investments in hydrogeochemical control measures during the exploration and exploitation phases of the mine life cycle will yield dividends in the post-closure phase. With such measures in place, and enhanced monitoring data to hand, the conjunctive application of physical and geochemical evaluations will eventually provide much-needed predictive tools to inform site management decisions in the future.

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The importance of pyritic roof strata in aquatic pollutant release from abandoned mines in a major, oolitic, berthierine-chamosite-siderite iron ore field, Cleveland, UK

Younger

2002

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The Cleveland Ironstone Field (NE England) is a major sedimentary iron orefield in which the principal ore minerals are iron silicates (berthierine, chamosite) and carbonates (siderite). The siderite in this area is known to be rich in Mg and Mn in solid solution with Fe. Although this ore assemblage would not normally be expected to give rise to acid mine drainage phenomena, a number of discrete ferruginous mine water discharges (totalling some 6.5 million litres (M1) day -1) have been identified flowing from abandoned underground mine workings and old spoil heaps in the ore field. Some of these discharges are extremely acidic (pH --> 3.3), with total Fe reaching 1220mgl -~. At the point of first emergence to the surface, most of the discharges are so highly charged with dissolved CO2 that they effervesce. Upon degassing, one of the discharges precipitates a ferroan calcite deposit, which is most unusual as a mine water discharge precipitate. All the other discharges precipitate more usual ferrihydrite and goethite 'ochres'. The geochemistry of these waters supports the view that oxidation of pyrite in the roof strata initiates dissolution of siderite in the old workings, releasing CO2, Fe and Mg to solution. This chain of reactions 2 results in these waters having SO4 as their major anion (from pyrite weathering) with Mg as the major cation (except where Fe exceeds Mg in concentration). Two of the near-coastal discharges have Na as the major cation, and elevated C1 concentrations, suggesting a seawater component. However, SO4/C1 ratios suggest that sea water can account for no more than 20% of these waters. Most of the Cleveland mine waters have significant environmental impacts, ranging from ecological damage to receiving water courses to flooding problems caused by the clogging of surface sewers with mine water precipitates. A range of remedial measures are proposed.

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Assessment, prediction and management of long-term post-closure water quality: a case study — Hlobane Colliery, South Africa

Cited by 4 publications

References 6 publications

Buenas prácticas para el uso del agua en la industria minera de México

Buenas prácticas para el uso del agua en la industria minera de México

Challenges in the characterization and prediction of the hydrogeology and geochemistry of mined ground

The importance of pyritic roof strata in aquatic pollutant release from abandoned mines in a major, oolitic, berthierine-chamosite-siderite iron ore field, Cleveland, UK

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