Abstract
Abstract Phosphorus content and its species were studied for the surface of Nansihu Lake. The phosphorus contents in the surface sediment are 465.5-13068.3 mg/kg, with the maximum value in Laoyun River, which was due to the waste water pollution from Jining City. The enrichment factors of organic phosphorus (OP) and NaOH-P are 6.5 and 9.0, respectively. The contents of phosphorus in other surface sediments are relatively lower. The enrichment factors of NaOH-P and OP are 1.0-3.7 and 1.3-6.0, indicating a minor human pollution.
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