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2010•Safety and Environmental EngineeringRequires access

Phosphorus Fractionations in Lake Dianchi Sediment

Haiying Gao

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Abstract

By the method of phosphorus fraction extraction,Fe-P,Al-P and Ca-P were gradually extracted from the superficial sediment in Lake Dianchi,and then the characteristics of the horizontal distribution of phosphorus fraction were obtained.The results indicated that TP is high in the northern and southern parts,but relatively low in the middle.The highest and average contents of TP are up to 13100 and 2728 mg·kg-1respectively.The contents of and Al-P are relatively low,accounting for only about 30% of TP,while Ca-P and OP contribute up to 70%.Labile phosphorus is impacted by the concentration of H+,which is significantly correlated with Fe-P +Al-P.As an indispensable part,Fe-P +Al-P is significantly correlated with TP(R=0.701,p0.01).

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What this paper is about

By the method of phosphorus fraction extraction,Fe-P,Al-P and Ca-P were gradually extracted from the superficial sediment in Lake Dianchi,and then the characteristics of the horizontal distribution of phosphorus fraction were obtained.The results indicated that TP is high in the northern and southern parts,but relatively low in the middle.The highest and average contents of TP are up to 13100 and 2728 mg·kg-1respectively.The contents of and Al-P are relatively low,accounting for only about 30% of TP,while Ca-P and OP contribute up to 70%.Labile phosphorus is impacted by the concentration of H+,which is significantly correlated with Fe-P +Al-P.As an indispensable part,Fe-P +Al-P is significantly correlated with TP(R=0.701,p0.01).

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Available abstract

By the method of phosphorus fraction extraction,Fe-P,Al-P and Ca-P were gradually extracted from the superficial sediment in Lake Dianchi,and then the characteristics of the horizontal distribution of phosphorus fraction were obtained.The results indicated that TP is high in the northern and southern parts,but relatively low in the middle.The highest and average contents of TP are up to 13100 and 2728 mg·kg-1respectively.The contents of and Al-P are relatively low,accounting for only about 30% of TP,while Ca-P and OP contribute up to 70%.Labile phosphorus is impacted by the concentration of H+,which is significantly correlated with Fe-P +Al-P.As an indispensable part,Fe-P +Al-P is significantly correlated with TP(R=0.701,p0.01).

Key concepts: Phosphorus, Sediment, Fraction (chemistry), Extraction (chemistry), Environmental chemistry, Chemistry, Environmental science, Mineralogy

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