黄河流域土地利用方式对土壤重金属污染的影响

黄河三角洲作为世界造陆速度最快的河口三角洲之一，但是近年来年来黄河流域草地、林地面积减少,而耕地、建设用地面积增加,所以研究黄河三角洲新生陆地的环境状况对于新生陆地的利用具有重要指导意义。文章利用ICP-MS分析了黄河三角洲新形成陆地土壤中重金属含量，主要是想揭示以下两个问题：(1)黄河三角洲新形成陆地是否可用于耕地或者人类居住需要注意哪些问题； (2)由于土地月度利用方式的变化和生态环境的恶化，黄河流域污染会对黄河三角洲有多大影响。结果显示：随着黄河流域土地利用的加快发展，黄河流沙中重金属污染状况逐渐恶化，特别是：Mn，Cu，Zn，Cr和Cd的污染与10年前比达到显著水平，而As, Pb和Hg含量也明显提高。

Effects of Soil Use along Yellow River Basin on the Pollution of Soil by Heavy Metals

Because of the decrease in pasture and woodland proportion,soil loss is severe along the Yellow River basin.The Yellow River delta has been one of the deltas that form land most quickly.Research on the pollution of new land is important for its use and appraising the environment and food pollution along Yellow River basin.The contents of heavy metals(Mn,Cu,Zn,As,Cd,Pb,Hg and Cr)in new soils(2006)and old soils(1996)from Yellow River delta,were analyzed by the method of ICP-MS/ICP-AES,in order to determine the level of pollution along Yellow River basin.The results showed that the heavy metals pollution along Yellow River basin is increasingly severe,especially the concentrations of Mn,Cu,Zn,Cr and Cd in soil forming in 2006 are significantly higher than those in 1996,which should be noticed by our government.