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THE ADSORPTION CHARACTERISTICS OF PHOSPHATE ON THE VERTICAL SEDIMENTS FROM DIFFERENT FUNCTIONAL REGIONS OF NANSI LAKE

Daoji Wu

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Abstract

The adsorption characteristics of phosphate on the vertical sediments from different functional regions(fish aquaculture,closed fishing areas,waterway and lake shore) of Nansi Lake were determined in laboratory,and the correlativity between phosphorus species in sediments and phosphate adsorption characteristics were also analyzed.The results indicated that the phosphate adsorption process reached equilibrium within 10h,and the maximal phosphate adsorption capacity(Qmax) for sediment increased with depth.The equilibrium phosphorus concentration(Cepc) and native adsorbed phosphorus(ωNAP) decreased with sediment depth while phosphate adsorption efficiency increased.In addition,Cepc had significantly positive correlation with Ex-P and Fe-P;Qmax had significantly negative correlation with Ex-P,Org-P and TP;ωNAP had significantly positive correlation with Ex-P and De-P;adsorption efficiency only had significantly negative correlation with Org-P.

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The adsorption characteristics of phosphate on the vertical sediments from different functional regions(fish aquaculture,closed fishing areas,waterway and lake shore) of Nansi Lake were determined in laboratory,and the correlativity between phosphorus species in sediments and phosphate adsorption characteristics were also analyzed.The results indicated that the phosphate adsorption process reached equilibrium within 10h,and the maximal phosphate adsorption capacity(Qmax) for sediment increased with depth.The equilibrium phosphorus concentration(Cepc) and native adsorbed phosphorus(ωNAP) decreased with sediment depth while phosphate adsorption efficiency increased.In addition,Cepc had significantly positive correlation with Ex-P and Fe-P;Qmax had significantly negative correlation with Ex-P,Org-P and TP;ωNAP had significantly positive correlation with Ex-P and De-P;adsorption efficiency only had significantly negative correlation with Org-P.

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Available abstract

The adsorption characteristics of phosphate on the vertical sediments from different functional regions(fish aquaculture,closed fishing areas,waterway and lake shore) of Nansi Lake were determined in laboratory,and the correlativity between phosphorus species in sediments and phosphate adsorption characteristics were also analyzed.The results indicated that the phosphate adsorption process reached equilibrium within 10h,and the maximal phosphate adsorption capacity(Qmax) for sediment increased with depth.The equilibrium phosphorus concentration(Cepc) and native adsorbed phosphorus(ωNAP) decreased with sediment depth while phosphate adsorption efficiency increased.In addition,Cepc had significantly positive correlation with Ex-P and Fe-P;Qmax had significantly negative correlation with Ex-P,Org-P and TP;ωNAP had significantly positive correlation with Ex-P and De-P;adsorption efficiency only had significantly negative correlation with Org-P.

Key concepts: Adsorption, Phosphate, Chemistry, Phosphorus, Sediment, Environmental chemistry, Geology, Biochemistry

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THE ADSORPTION CHARACTERISTICS OF PHOSPHATE ON THE VERTICAL SEDIMENTS FROM DIFFERENT FUNCTIONAL REGIONS OF NANSI LAKE — Research Paper | ScholarLens