Faculty of Environmental Engineering, Lublin University of Technology, Lublin, Poland.
PLoS One. 2020 Nov 12;15(11):e0242081. doi: 10.1371/journal.pone.0242081. eCollection 2020.
The most economical method of drill cuttings disposal may be their application in land reclamation which allows for the wastes recovery. However, the wastes application into the soil should ensure that the quality of the environment would not be deteriorated. These investigations were aimed at identifying the effect of drill cuttings, which were the mixture of different types of drilling wastes, on the physicochemical properties of acidic soil and growth of red clover (Trifolium pratense L.). The experimental design comprised 5 treatments, which differed in a dose of the drill cuttings: 0% (control), 2.5%, 5%, 10% and 15% of dry weight. A six-week pot experiment was conducted to determine the influence of the wastes on the plant growth. The results showed that the drill cuttings addition significantly changed the chemical and physicochemical properties of the soil, such as: electrical conductivity (EC), pH, base saturation, content of carbonate, alkaline cations (Ca2+, Na+, K+, Mg2+), organic matter, total organic carbon (TOC), and available phosphorus form. However, the most important factors that influenced the growth of red clover were pH, base saturation, content of Mg2+ and plant available phosphorus. The red clover biomass was increased from 1.5 to 2.5 times depending on the dose of wastes. We concluded that the examined wastes can be used for reclamation of the acid and unfertile degraded soils, but the amount of wastes should not exceed 5% of the soil, because the highest total clover biomass was observed just at this dose.
最经济的钻屑处理方法可能是将其应用于土地复垦，从而实现废物回收。然而，将废物应用于土壤中应确保环境质量不会恶化。这些研究旨在确定钻屑（不同类型的钻井废物的混合物）对酸性土壤的理化性质和红三叶草（Trifolium pratense L.）生长的影响。实验设计包括 5 种处理，它们在钻屑的剂量上有所不同：0%（对照）、2.5%、5%、10%和 15%的干重。进行了为期 6 周的盆栽实验，以确定废物对植物生长的影响。结果表明，添加钻屑会显著改变土壤的化学和理化性质，例如：电导率（EC）、pH 值、基础饱和度、碳酸盐含量、碱性阳离子（Ca2+、Na+、K+、Mg2+）、有机质、总有机碳（TOC）和有效磷形态。然而，影响红三叶草生长的最重要因素是 pH 值、基础饱和度、Mg2+含量和植物有效磷。红三叶草的生物量增加了 1.5 到 2.5 倍，具体取决于废物的剂量。我们得出结论，所研究的废物可用于酸性和贫瘠退化土壤的复垦，但废物的数量不应超过土壤的 5%，因为在这个剂量下观察到了最高的总三叶草生物量。
