鄱阳湖与长江交汇区陆域重金属含量研究

The Content of Heavy Metals in the Terrestrial Area at the Intersection of Poyanghu Lake and Yangtse River

通过测定鄱阳湖与长江交汇区陆域(包括九江—新港和湖口2个采样地)土壤及植物体内的重金属As、Hg、Cr、Cd、Pb含量,统计分析了植物体内重金属含量与土壤中重金属含量的相关性及拟合曲线,同时提出相应的生态修复措施。结果表明:九江—新港土壤含Pb量高于湖口,而这两个地点的As、Hg、Cr、Cd含量差异不显著。九江—新港和湖口的植物根部重金属Cr、Pb、Cd含量高于茎部和叶部,而As和Hg含量恰好相反,茎部重金属含量处于中间水平。对所有采样点植物体内的重金属含量与土壤中重金属含量进行相关性分析,得出植物体内与土壤中的Hg、Pb含量相关性显著,而植物体内与土壤中的As、Cd、Cr含量没有显著的相关性。

On the basis of the measurement of the heavy metals As, Hg, Cr, Cd, Pb in the soil and plants on the terrestrial area at the intersection of Poyanghu Lake and Yangtse River（ including two sampling plots in Jiujiang-Xingang and Hukou ）, the difference of the heavy metals in these two plots were compared, and the correlation and curve fitting of the heavy metal contents in the plants and soil were counted and analyzed, and the ecological restoration measures were put forward. The result showed that, the content of Pb （63.56 mg·kg^-1 ） in the soil of Jiujiang-Xingang sampling plot was higher than that （53.12 mg·kg^-1 ） of Hukou sampling plot, but the contents of As,Hg, Cr, Cd were not significantly different. In Jiujiang-Xingang and Hukou sampling plots, the contents of Cr, Pb, Cd in the plant roots were higher than that in stems and leaves, but the contents of As and Hg were just contrary, the contents of heavy metals in stems were in the medium level. Analyzing the correlation of the heavy metal contents in plants and soil among all sampling plots, the results are as follows ： the contents of Hg, Pb in plant and soil were correlated, but As, Cd, Cr were not.