An Assessment of Residues from Duct Injection Demonstration Sites

Pflughoeft-Hassett, Debra F.; Hassett, D.J.; Eylands, Kurt E.; Weber, G.F.; Martin, Cameron

doi:10.1080/10473289.1994.10467316

Cited by 2 publications

(1 citation statement)

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“…In the dynamic water experiment, the leaching cycle was shorter than that of the static water experiment, and the release of elements was representative because the groundwater flow was slow [24]. However, the leaching process of elements mainly occurs at the early stage of leaching [25,26], so the dynamic experimental period was set to 17 d. The average annual development temperature of tailings in the Gongyi mine area was 16 °C to 20 °C; and because it was mine water, at a depth of 200 m underground, the temperature above the surface was chosen for the experiment, so the static temperature was set at 25 °C and 35 °C as the study interval. In order to better explore the influence of temperature on the acid mine water produced by the oxidation of pyrite; therefore, 55 °C was used as an auxiliary factor in the dynamic leaching experiment.…”

Section: Experimental Factors and Conditionmentioning

confidence: 99%

Experimental Simulation Study of Mine Water Acidification under the Action of Pyrite

et al. 2022

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The discharge of acidic water has become an environmental issue of great concern worldwide. In order to investigate the characteristics and mechanism of acidic water induced by pyrite in sulfur-rich mines, indoor static precipitation and dynamic leaching simulation experiments were carried out under the conditions of pyrite content, rock particle size, media combination, and ambient temperature. At the same time, this paper used the gray correlation method to quantitatively analyze the influencing factors. The results showed that the degree of groundwater acidification was negatively correlated with the rock particle size and temperature and positively correlated with the pyrite content. The quantitative analysis of the effect of each factor on acid mine drainage pH was pyrite content > temperature > rock size. When considering different media conditions, the combined effect of the three media on reducing the acidification degree of mine water was limestone > gangue > coal. In addition, dynamic leaching and static soaking have different effects on the acidification of the mine water, with the latter acidifying more rapidly. It is also concluded that although pyrite enrichment was the main controlling factor affecting the acidification of mine water in nature, complexation of trivalent iron ions adsorbed in the formation was more likely to be the main causal mechanism for the rapid acidification of mine water in coal mining areas.

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Section: Experimental Factors and Conditionmentioning

confidence: 99%