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Statistical design for reactive mixture selection in mine drainage treatment

机译:矿山排水处理中反应混合料选择的统计设计

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Generation of acid mine drainage (AMD) results from the biological and physico-chemical oxidation of sulfide minerals. The use of a sulfate-reducing reactive wall in the path of AMD contaminated groundwater is recognized as a cost-effective alternative method. However, a rigorous method for reactive mixture selection still needs to be investigated. The aim of this study was to select the most appropriate reactive mixture using a multiple factor design based on sulfate reduction rate. Mixture proportions (wt %) were settled for wood chips (0-30) poultry manure (10-20) leaf compost (0-30) and for two types of porous support: oxidized tailings (0-8) and sand (0-8). The reactivity of 17 mixtures was assessed using a synthetic AMD. Results indicate that within 41 days, sulfate concentrations decreased from initial concentrations of 2000-3200 mg/l to < 90 mg/l. Sulfate reduction rates ranged from 35.6 mg/l*d to 156.3 mg/l*d. The most efficient reactive mixture in terms of sulfate reduction rate was selected.
机译:酸性矿山排水(AMD)的产生是由于硫化物矿物的生物和物理化学氧化。在AMD污染的地下水路径中使用硫酸盐还原反应墙被认为是一种经济高效的替代方法。但是,仍然需要研究一种严格的反应混合物选择方法。这项研究的目的是使用基于硫酸盐还原速率的多因素设计来选择最合适的反应混合物。混合比例(wt%)用于木屑(0-30),家禽粪便(10-20),叶堆肥(0-30)和两种多孔载体:氧化尾矿(0-8)和沙子(0- 8)。使用合成AMD评估了17种混合物的反应性。结果表明,在41天内,硫酸盐浓度从2000-3200 mg / l的初始浓度降低到<90 mg / l。硫酸盐还原速率为35.6 mg / l * d至156.3 mg / l * d。选择了最有效的硫酸盐还原速率反应性混合物。

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