Efficiency of acid sulphate soils reclamation in coal mining areas

IF 2.4 Q2 MINING & MINERAL PROCESSING
N. Mitrakova, E. Khayrulina, S. Blinov, Anna Perevoshchikova
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Abstract

During the development of coal deposits, acid mine waters flowing to the surface cause the formation of acid sulphate soils. We study the effectiveness of soil reclamation by agrochemical and geochemical methods at the site of acid mine water discharge in the Kizel Coal Basin, carried out in 2005 using alkaline waste from soda production and activated sludge. A technosol with a stable phytocenosis was detected on the reclaimed site, and soddy-podzolic soil buried under the technogenic soil layer with no vegetation on the non-reclaimed site. The buried soddy-podzolic soil retains a strong acid рН concentration Н2О = 3. A high content of organic matter (8-1.5 %) is caused by carbonaceous particles; the presence of sulphide minerals reaches a depth of 40 cm. Technosol has a slightly acid pH reaction H2O = 5.5, the content of organic matter due to the use of activated sludge is 19-65 %, the presence of sulphide minerals reaches a depth of 20-40 cm. The total iron content in the upper layers of the technosol did not change (190-200 g/kg), the excess over the background reaches 15 times. There is no contamination with heavy metals and trace elements, single elevated concentrations of Li, Se, B and V are found.
煤矿矿区酸性硫酸盐土壤复垦效率研究
在煤矿开发过程中,酸性矿井水向地表流动,形成了酸性硫酸盐土壤。本研究以2005年克则尔煤田酸性矿井排水场为研究对象,利用碱废水和活性污泥对土壤进行了农化和地球化学复垦。在复垦场地上发现了一种植物生长稳定的技术土壤,而在未复垦场地上,埋在技术土层下的钠灰化土没有植被。埋置的钠灰化土保持了强酸性рН浓度Н2О = 3。有机质含量高(8- 1.5%)是由碳质颗粒引起的;硫化物矿物的存在达到40厘米的深度。Technosol具有微酸性pH反应H2O = 5.5,因使用活性污泥而产生的有机物含量为19- 65%,硫化物矿物的存在深度达到20- 40cm。技术溶胶上层的总铁含量没有变化(190 ~ 200 g/kg),超过背景的量达到15倍。未发现重金属和微量元素污染,仅发现Li、Se、B、V单项浓度升高。
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来源期刊
Journal of Mining Institute
Journal of Mining Institute MINING & MINERAL PROCESSING-
CiteScore
7.50
自引率
25.00%
发文量
62
审稿时长
8 weeks
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