Samples of overlying water, suspended particles and bed mud in the Inner Mongolia stretch of the Yellow River were collected systemically and their heavy metal element contents were analysed.
系统地采集黄河内蒙古段上覆水、悬浮物和底泥样品，分析其中重金属元素的含量。
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。
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