三峡水库小江流域消落区土壤重金属的时空分布

摘要

2009年5月、7月和9月对小江流域消落区5个断面土壤重金属的监测结果表明,Cu、Zn、Pb、Cd、Fe和Mn浓度均值分别为28.41、90.54、16.94、1.46、5.053×104和554.04mg/kg。随海拔高程升高,各重金属浓度均值在高程160m处最小、170m处增加;流域沿程在养鹿段减少,高阳和黄石段增加,在双江段又减少;随时间变化,7月增加、9月减少。Zn和Cu、Fe呈极显著正相关性,Pb和Cd、Fe,Cu和Fe、Pb呈较显著正相关性;pH和Mn呈正相关,与其他5种重金属呈负相关,与Fe%Soil samples were collected from the surface of five sections in the watershed of Xiaojiang River during May,July and September in 2009.The average concentration of Cu,Zn,Cd,Pb,Fe and Mn were 28.41,90.54,16.94,1.46,5.053×104 and 554.04 mg/kg.With the incr