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International Journal of Analytical Chemistry
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International Journal of Analytical Chemistry
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2015
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Article
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Tab 1
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Research Article
Risk Assessment and Prediction of Heavy Metal Pollution in Groundwater and River Sediment: A Case Study of a Typical Agricultural Irrigation Area in Northeast China
Table 1
Classification of NI.
Class
Pollution degree
NI
0
No pollution
≤0.5
1
Clean
0.5–0.7
2
Warm
0.7–1.0
3
Polluted
1.0–2.0
4
Medium pollution
2.0–3.0
5
Severe pollution
>3.0