珠江三角洲经济区河水中微量元素的空间分布

在珠江三角洲经济区采集了29个河水样品,利用高分辨率仪器ICP MS测量了河水中微量元素的含量。结果表明,河水中稀土元素的平均含量按西江、北江、珠三角河、深圳河、东江的顺序呈增加趋势;珠三角河及深圳河具有较高重金属含量,西江和北江中重金属含量相对较低,东江居中。经分析发现,珠江三角洲经济区河水中微量元素的空间分布特征是自然条件和人类活动共同作用的结果;自然环境对稀土元素的空间分布起主要作用;人类活动是影响重金属分布特征不可忽视的重要因素。

Spatial distribution of trace element in rivers in the Pearl River Delta Economic Zone

Twenty-nine water samples were collected from different rivers of the Pearl River Delta Economic Zone. An inductively coupled plasma-mass spectrometry (ICP-MS) was used to measure the concentrations of trace element in the sampling water. The result suggested that the average concentrations of rare earth element in river water showed an increasing trend from Xijiang River, Beijiang River, Channels of Pearl River Delta, Shenzhen River to Dongjiang River. As to heavy metal elements, Channels of Pearl River Delta and Shenzhen River have relatively high concentrations. Relatively lower concentrations of heavy metal appear in Xijiang River and Beijiang River. It can be found that trace element distribution in river of the Pearl River Delta Economic Zone is affected by both natural conditions and human activity. Natural background does the main impact on the spatial distribution of rare earth element. As to the distribution of heavy metal, human activity is an important factor that can't be ignored.