新疆阿拉尔垦区大气降尘中重金属时空分布特征

连续12个月对新疆阿拉尔垦区9个样点的3个不同高度处所采集的大气降尘中的重金属含量进行分析,结果表明:所测大气降尘中的5种重金属元素以铁的含量最高,铬的含量最低,其中铜、铁、锰及锌的含量均在4月份达到最大值,并且与降尘量之间有较好的线性关系。在不同的空间范围内,大气降尘中的重金属含量存在显著差异,其中铜、铁、锰的含量均随着高度的上升而呈现递增的趋势;铬的含量随高度的递增呈现递减趋势。

Characteristic of Space-Time Distribution about Heavy Metal in Dust Fall in Xinjiang Aral Irrigated Area

This paper analyzed the heavy metal contents in dust fall at 9 sites and 3 height of Xinjiang Aral irrigated area in 12 months continuously.The results showed that content of Fe is the highest among 5 monitored heavy metals in the dust fall,content of Cr is the lowest.The contents of Cu、Fe、Mn and Zn are maximum in April,and have better linear relation with dust fall quantity.The contents of heavy metals in dust fall have significant difference in different space area,contents of Cu、Fe、Mn increase with the height rise,while the content of Cr is on the contrary.