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| Heavy metal content and its pollution in the soils in the habitat area of camellia oleifera in Yunfu City, Guangdong, China |
| Xie Yini,Ye Longhua,Li Xiaochuan,Ding Xiaogang,Yang Haiyan,Zhang Geng,Qi Ye |
| (Guangdong Provincial Key Laboratory of Silviculture,
Protection and Utilization / Guangdong Academy of Forestry;Guangdong Provincial Forestry Technology Extension
Station) |
| Abstract: |
| The soils in the Camellia oleifera habitat
areas in Yunfu city were sampled with the methods
of distributing random spots, special spots and forest
distribution points. to determine the contents of five
heavy metal elements (Zn, Cu, Pb, Cd and Ni) and
their potential pollutions. The results showed that five
heavy metal elements varied more than 50%, a medium
intensity variation. There were significant differences
in heavy metal contents among 5 locations sampled in
Yunfu city. The overall average of the contents of five
elements were lower than the second level of the soil
environmental background value and the soil environmental quality standards issued in Guangdong Province.
The single factor pollution index showed the highest
degree pollution of Cu. The overall Nemerow pollution
index of Yunfu city was 0.73, which was at the level 2
of the pollution class,or clean level. By contrast, Yunan
county, Yuncheng district and Yun’an district, the subordinates of Yunfu city, had a comprehensive soil pollution at the level 3, the light pollution while Luoding city
reachedthe warning level compared to the non-pollution
in Xinxing county. Therefore, it is alarming that the pollution of Yunan county, Yuncheng district, Yun’an district and Luoding city should be controlled by measures
of the combination of physics, chemistry and biology |
| Key words: Yunfu city · Camellia oleifera habitat area ·
Heavy metal · Variation · Pollution evaluation |
