Effect of Soil Colloids on Migration of Cadmium in Soils from Water Level Fluctuating Zone of Three Gorges Reservoir

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- Effect of Soil Colloids on Migration of Cadmium in Soils from Water Level Fluctuating Zone of Three Gorges Reservoir
- Issue 4, Pages: 16-20(2007)
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- Published：2007
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Effect of Soil Colloids on Migration of Cadmium in Soils from Water Level Fluctuating Zone of Three Gorges Reservoir[J]. 2007, (4): 16-20.
DOI：

Effect of Soil Colloids on Migration of Cadmium in Soils from Water Level Fluctuating Zone of Three Gorges Reservoir[J]. 2007, (4): 16-20. DOI：

选取三峡水库消落区典型土壤

即紫色土、黄壤、紫色潮土和灰棕潮土为研究对象

以相应土壤胶体、蒙脱石矿物的10 mg/L Cd(NO3)2淋洗液分别淋洗土柱

研究了水分散态胶体对镉在土柱中迁移的影响.添加上述胶体的镉淋洗液

在紫色土、黄壤、紫色潮土和灰棕潮土土柱中镉迁移量分别是对照的1.18～4.96

1.05～2.37

1.10～4.33

1.03～3.33倍.结果表明胶体能够促进镉离子在土层中的迁移

其迁移能力遵循紫色土胶体≥紫色潮土胶体＞灰棕潮土胶体＞蒙脱石胶体＞黄壤胶体的规律.由此得出

胶体吸附态镉的迁移能力取决于胶体类型和土柱性质.

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Effect of Soil Colloids on Migration of Cadmium in Soils from Water Level Fluctuating Zone of Three Gorges Reservoir

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