基于懸鈴木葉片重金屬累積特性的大氣污染分析和評價

更新時間：2014-07-15 14:51 來源：環(huán)境科學報作者: 閱讀：2435

中文摘要

以懸鈴木葉片為監(jiān)測器官，對淮南市6種大氣環(huán)境20個樣區(qū)Cd等6種重金屬的累積量進行了測量和聚類，并分析了葉片富集重金屬的EF值. 結(jié)果表明，不同樣區(qū)懸鈴木葉片累積的6種重金屬含量不同，平均值大小表現(xiàn)為Zn>Cu>Cr>Ni>Pb>Cd；環(huán)境不同，葉片累積同種重金屬的量也存在差異，水泥廠周邊環(huán)境懸鈴木葉片累積的Cd和礦區(qū)Cu以及交通主干道大氣環(huán)境中Cr、Ni、Pb和Zn顯著高于其他環(huán)境；除風景區(qū)、自然村Cr外，其他采樣環(huán)境中被測重金屬EF平均值全部超過1，礦區(qū)、電廠、交通主干道及水泥廠周邊環(huán)境中的6種重金屬的EF值全部大于3，淮南市總體大氣環(huán)境重金屬污染為Cd>Cu>Zn>Ni>Pb>Cr.

英文摘要

The present work was aimed to evaluate the heavy metal pollution in the atmosphere of Huainan City. We measured and clustered the accumulation of six heavy metals in Platanus acerifolia leaves in 20 sampling fields with six types of environmental conditions, and analyzed the EF value of heavy metal enrichment in the leaves. The results showed that the accumulations in Platanus acerifolia leaves varied according to different types of metals, following the order of Zn>Cu>Cr>Ni>Pb>Cd. Environmental conditions also had great influence on the accumulation of heavy metals. Cd and Cu were mostly found in cement plant and mine, respectively, and Cr, Ni, Pb and Zn were significant higher in main road, compared with other environmental conditions. The average values of EF for all the metals expect Cr in scenic and village area were over 1. The average values of EF for all the metals in mine, power plant, main road and cement plant were above 3. The overall pollution condition of heavy metals in Huainan City followed the order of Cd>Cu>Zn>Ni>Pb>Cr.

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