Int J Phytoremediation. 2014;16(2):138-54. doi: 10.1080/15226514.2012.759533.
A semi-field experiment was conducted to evaluate the use of mixed municipal solid waste compost (MMSWC) and green waste-derived compost (GWC) as immobilizing agents in aided-phytostabilization of a highly acidic soil contaminated with trace elements, with and without a plant cover of Agrostis tenuis. The compost application ratio was 50 Mg ha(-1), and GWC amended soil was additionally limed and supplemented with mineral fertilizers. Both treatments had an equivalent capacity to raise soil organic matter and pH, without a significant increase in soil salinity and in pseudo-total As, Cu, Pb, and Zn concentrations, allowing the establishment of a plant cover. Effective bioavailable Cu and Zn decreased as a consequence of both compost treatments, while effective bioavailable As increased by more than twice but remained as a small fraction of its pseudo-total content. Amended soil had higher soil enzymatic activities, especially in the presence of plants. Accumulation factors for As, Cu, Pb, and Zn by A. tenuis were low, and their concentrations in the plant were lower than the maximum tolerable levels for cattle. As a consequence, the use of A. tenuis can be recommended for assisted phytostabilization of this type of mine soil, in combination with one of the compost treatments evaluated.
进行了一项半田间实验，以评估混合城市固体废物堆肥（MMSWC）和源自绿色废物的堆肥（GWC）作为固定剂，在有和没有细叶羊茅（Agrostis tenuis）植物覆盖的情况下，辅助植物稳定化处理高度酸性土壤中微量元素污染的效果。堆肥的施用量为 50 Mg ha(-1)，添加 GWC 的土壤还进行了石灰处理，并补充了矿物肥料。这两种处理方法都具有提高土壤有机质和 pH 值的同等能力，而不会显著增加土壤盐分和伪总砷、铜、铅和锌的浓度，从而允许植物覆盖的建立。由于两种堆肥处理，有效生物可利用的铜和锌都减少了，而有效生物可利用的砷增加了两倍多，但仍只是其伪总量的一小部分。改良土壤的土壤酶活性更高，尤其是在有植物存在的情况下。细叶羊茅对砷、铜、铅和锌的积累因子较低，其在植物中的浓度低于牛的最大耐受水平。因此，可以推荐在使用一种评估的堆肥处理的情况下，用细叶羊茅辅助这种类型的矿山土壤的植物稳定化。
