Department of Plant Biology and Soil Science, Section of Soil Science, University of Vigo, 32004, Ourense, Spain.
Department of Plant Biology and Soil Science, Section of Soil Science, University of Vigo, 32004, Ourense, Spain.
J Environ Manage. 2017 May 1;192:79-88. doi: 10.1016/j.jenvman.2017.01.042. Epub 2017 Jan 29.
The European Community Bureau of Reference method (BCR) was used for evaluating the effects of pine bark amendment (0, 24 and 48 g kg) and ageing (1 and 30 days) on Cd, Cu, Ni, Pb and Zn fractionation, on samples from an acid mine soil. In addition, the stirred flow chamber technique was applied for analyzing heavy metals desorption from the unamended and pine bark amended mine soil. When the unamended soil were not subjected to ageing, the added heavy metals were mainly accumulated as soluble fraction (>90% for Cd, Ni and Zn; 71% for Cu; and 45% for Pb). Pine bark amendment and ageing had little effect on Cd, Ni and Zn fractionation, whereas important changes were detected for Cu and Pb in response to both pine bark amendment and ageing (decrease in the soluble fractions, and increase in less mobile fractions). Desorption experiments showed that both pine bark amendment and ageing decreased heavy metals release from the mine soil. The results of this study indicate that pine bark amendment could be used to increase heavy metals retention (especially in the case of Cu and Pb) in acid mine soils, thus reducing the risks of metal transfer to uncontaminated environmental zones.
欧洲共同体参考局（BCR）方法用于评估松树皮改良（0、24 和 48g/kg）和老化（1 和 30 天）对酸性矿山土壤中 Cd、Cu、Ni、Pb 和 Zn 形态的影响。此外，还应用搅拌流室技术分析了未改良和改良的松木树皮矿山土壤中重金属的解吸。当未改良的土壤未经历老化时，添加的重金属主要积累为可溶部分（Cd、Ni 和 Zn 超过 90%；Cu 为 71%；Pb 为 45%）。松树皮改良和老化对 Cd、Ni 和 Zn 的形态影响不大，但 Cu 和 Pb 的形态因松树皮改良和老化而发生重要变化（可溶部分减少，移动性较小的部分增加）。解吸实验表明，松树皮改良和老化都减少了矿山土壤中重金属的释放。本研究结果表明，松树皮改良可用于增加酸性矿山土壤中重金属的保留（特别是 Cu 和 Pb），从而降低金属向未污染环境区转移的风险。
