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Temporal-spatial variation of surface water affected by apatite mining Activity in Lao Cai, Viet Nam

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In particular, heavy polluted streams flow through apatite mining areas such as Ngoi Duong, Ngoi Dum and Chu O. The results of PCA show changes in the distribution of environmental quality parameters in major components by years.In particular, the parameters that contain high information values include COD, BOD5¸ N |

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