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The Impact of Pesticides - Academy Publish

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Shanghai and Guanting Reservoir (China). Some regions such as Beijing (China)and Tanzania showed higher results.Table 9. Concentration <strong>of</strong> ΣHCH (ng g -1 dw) in soil from other regions in the worldLocations ΣHCH ReferencesShanghai (China) GiaLam 1 (79.47 ngg -1 ) > Hanoi centre 1 (37.35 ng g -1 ). In fact, agricultural areas in Hanoi are mainlysituated in SonSon, ThanhTri and TuLiem district, whereas the industrial Parks aremainly situated in DongAnh and GiaLam district. This can be one element toexplain this order and may also suggest that the used quantity <strong>of</strong> DDT in SonSon,ThanhTri and TuLiem were probably higher than in the other areas in Hanoi. <strong>The</strong>mean ΣDDT concentrations in these areas are close to MAC-value <strong>of</strong> ΣDDT in soiland thus, need further studies to assess their contamination status in more detail.Figure 6. Distribution <strong>of</strong> ΣDDT concentrations in surface soil from study areas<strong>Academy</strong><strong>Publish</strong>.org - <strong>The</strong> <strong>Impact</strong> <strong>of</strong> <strong>Pesticides</strong>306

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