Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Suchdol, Czech Republic.
Int J Phytoremediation. 2012 Sep;14(8):806-19. doi: 10.1080/15226514.2011.628714.
The aim of our study was to compare the sorption properties of a contaminated soil before and after two types of phytoremediation (natural phytoextraction vs. phytostabilization with dolomite limestone (DL) application). Soil from a pot experiment in controlled greenhouse conditions performed for two vegetation periods was used for the study. Lead, as the main contaminant in the studied soil, was easily desorbed by Cu, especially due to the increased affinity of Cu for soil organic matter; hence input of Cu to the studied soil can present another environmental risk in soils contaminated with other metals (such as Pb). In addition, the sorption behavior of chosen metals from single-element solutions differed from multielement solutions. The obtained results proved the different sorption behavior of metals in the single-element solution compared to the multi-element ones. Soil sorption behavior of Cd, Cu, and Zn decreased with the presence of the competitive metals; nevertheless, Pb sorption potential was not influenced by other competitive metals. Natural phytoextraction showed no significant effect on the sorption of Cd, Cu, Pb, and Zn onto the soil On the other hand, phytostabilization associated with DL application improved the soil sorption efficiency of all chosen metals, especially of Cu.
我们的研究目的是比较两种植物修复（自然植物提取与施用白云石稳定化）前后污染土壤的吸附特性。研究使用了在可控温室条件下进行两个植被期的盆栽实验中的土壤。在所研究的土壤中，铅是主要污染物，铜很容易将其解吸出来，特别是由于铜对土壤有机质的亲和力增加；因此，向受其他金属（如铅）污染的土壤中添加铜可能会带来另一种环境风险。此外，单元素溶液中选定金属的吸附行为与多元素溶液中的不同。从单元素溶液中获得的结果证明了与多元素溶液相比，金属在单元素溶液中的吸附行为不同。在存在竞争金属的情况下，土壤对 Cd、Cu 和 Zn 的吸附能力下降；然而，Pb 的吸附潜力不受其他竞争金属的影响。自然植物提取对 Cd、Cu、Pb 和 Zn 吸附到土壤中的情况没有显著影响。另一方面，与 DL 应用相关的植物稳定化提高了所有选定金属的土壤吸附效率，尤其是 Cu。
