结果表明各航道底泥中重金属除铅以外，含量均超过《土壤环境质量标准》中的二级标准，其中镉的污染最为严重。
The result showed the heavy metal content in bed mud was over Soil Environmental Quality Standard Two except Pb, in which Cd pollution was the most significant.
结果表明：园林植物对环境污染物中的铅、镉具有一定的吸收净化能力，并依污染物和植物的不同具有明显差异。
The results show that ornamental plants have certain absorption and purgation ability and have significant differences according to different pollutants and plants.
综述了镉在环境中的分布、污染来源及其在土壤中的迁移转化规律，着重讨论了镉在土壤中的赋存形态、生物有效性以及提取方法的现状和进展。
Progress in distribution, sources and transportation of cadmium in soils are summarized. The occurrence, bioavailability and extraction methodologies for cadmium in soils are discussed in this paper.
综述了镉在环境中的分布、污染来源及其在土壤中的迁移转化规律，着重讨论了镉在土壤中的赋存形态、生物有效性以及提取方法的现状和进展。
Progress in distribution, sources and transportation of cadmium in soils are summarized. The occurrence, bioavailability and extraction methodologies for cadmium in soils are discussed in this paper.
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