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首页> 外文期刊>Journal of Sustainable Development >An Empirical Study on Improving Quality of Coal-Mining Refuse for Re-Vegetation Using Amendments
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An Empirical Study on Improving Quality of Coal-Mining Refuse for Re-Vegetation Using Amendments

机译：使用修正案改善采煤废物再植被质量的实证研究

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Re-vegetation on closed mining-sites for carbon sequestration and/or bio-energy production is one of the strategies of addressing the world-wide issues of energy crisis and global warming. However, mine soils including coal-mining refuse usually have poor quality and are unfavorable to plant growth. Thus, the major objective of this study was to improve quality of coal-mining refuse under laboratory conditions using zeolite, flue gas desulfurization gypsum (FGD), flyash, and biosolids at 10% (w/w) rate. Chemical analysis did not indicate any significantly high concentrations of toxins in the solid or the solution phase, suggesting that soil acidity was the principal chemical constraint hindering re-vegetation. In this context, FGD was the best among the tested materials for increasing soil pH and improving lettuce ( Lactuca sativa ) seed germination, while application of biosolids significantly enhanced soil aggregate stability. Specifically, laboratory tests showed that application of FGD increased pH of the acidic coal refuse samples from initial 3.80-4.66 to 5.70-6.60 and enhanced the growth of germinated lettuce seedlings in mine soil solution from 2.9-4.4 cm to 5.9-8.6 cm. The biosolids amendment increased the geometric mean diameter of the mine soil aggregates from the antecedent 0.93-0.99 mm to 1.13-1.25 mm. However, use of zeolite and fly-ash did not significantly improve the soil quality.
机译：在封闭的采矿场进行植被再封存和/或生物能源生产是解决世界范围内能源危机和全球变暖问题的战略之一。但是，包括煤矿垃圾在内的矿土通常质量较差，不利于植物生长。因此，本研究的主要目标是在实验室条件下使用10％（w / w）的沸石，烟道气脱硫石膏（FGD），粉煤灰和生物固体来提高采煤垃圾的质量。化学分析没有显示出固相或溶液相中任何高浓度的毒素，表明土壤酸度是阻碍重新植被的主要化学约束。在这种情况下，FGD是提高土壤pH值和改善生菜（Lactuca sativa）种子发芽的最佳材料，而生物固体的施用显着增强了土壤团聚体的稳定性。具体而言，实验室测试表明，FGD的应用将酸性煤refuse石样品的pH从最初的3.80-4.66提高到5.70-6.60，并将矿井土壤溶液中发芽的生菜幼苗的生长从2.9-4.4 cm增加到5.9-8.6 cm。生物固体改良剂将矿山土壤团聚体的几何平均直径从之前的0.93-0.99 mm增加到1.13-1.25 mm。但是，使用沸石和粉煤灰并不能显着改善土壤质量。

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