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通过对草河口地区二道坊河沉积物和土壤中铊的分析与研究表明，该区域土壤中铊的含量高于世界与中国土壤铊含量的值；铊的富集特征具有一定的特殊性，并且铊在土壤和沉积物中与其相应性质关系有较大差异；在该河流沉积物的条件下，游离氧化锰对铊富集起着重要作用。
The analysis and research of thallium in the sediments and soils of Erdaofang River in Caohekou area shows that the content of thallium in the soil is higher than that in the world and China soils. The enrichment characteristics of thallium have some particularities, And the relationship between thallium and its corresponding properties in soils and sediments is quite different. Under the conditions of the river sediments, free manganese oxide plays an important role in the enrichment of thallium.