灰藓属植物对衡阳市大气重金属污染的监测作用

Effect of Hypnum Monitoring Atmospheric Heavy Metal Pollution in Hengyang City

研究主要是利用灰藓属植物大灰藓(Hypnum plumaeforme)对衡阳市内有代表性的区域大气重金属污染进行监测,分别选取了工业区、文教区、居民区、休闲旅游区4个功能区,采用原子吸收光谱法对样品中Cu、Hg、Cd、Pb、Zn等6重金属元素含量进行测定.结果:Cu、Hg、Cd、Pb、Zn、Cr在4个监测点的含量范围依次为10.211 ug/g^20.824 ug/g,0.515 ug/g^0.931 ug/g,0.326 ug/g^1.669 ug/g,22.746 ug/g^51.625 ug/g,101.745 ug/g^123.221ug/g,3.617 ug/g^15.822 ug/g,单一重金属污染指数值范围依次是:1.564~3.198,1.702~3.089,0.895~4.675,2.247~5.102,1.574~1.987,1.997~8.726.结论:利用灰藓属植物监测衡阳市大气重金属污染,Cr污染最严重,各监测点的重金属污染程度最严重的是松木工业园.

Hypnum plumaeforme was used to monitor the regional atmospheric heavy metal pollution in Hengyang city,among which there were four industrial zones such as cultural and educational areas,residential areas,leisure and tourism areas selected. The contents of Cu,Hg,Cd,Pb,Zn and other heavy metal elements in the samples were determined by atomic absorption spectrometry. Results: The content range of Cu,Hg,Cd,Pb,Zn and Cr in the four monitoring points was respectively 10. 211 ug/g ~ 20. 824 ug/g,0. 515 ug/g ~ 0. 931 ug/g,0. 326 ug/g ~ 1. 669 ug/g,22. 746 ug/g ~ 51. 625 ug/g,101. 745 ug/g ~ 123. 221 ug/g,3. 617 ug/g ~ 15. 822 ug/g,and the range of single heavy metal pollution index was respectively 1. 564 ~ 3. 198,1. 702 ~ 3. 089,0. 895 ~ 4. 675,2. 247 ~ 5. 102,1. 574 ~ 1.987,1. 997 ~ 8. 726. Conclusion: Hypnum plumaeforme was used to monitor atmospheric heavy metal pollution in Hengyang City,among which Cr was the most polluted,and the heavy metal pollution in the Song-mu industrial Park was the most serious in all the monitoring sites.