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Spatial distribution of phosphorus forms in sediments
with different distances to the estuary of the Dianchi Lake, China |
| Shaoyong LU1,Xiangcan JIN1,Fengchang WU1,Jing SI1,Jianning GUO2, |
| 1.Research Center of Lake
Eco-environment, Chinese Research Academy of Environmental Sciences,
Beijing 100012, China; 2.Research Center of Lake
Eco-environment, Chinese Research Academy of Environmental Sciences,
Beijing 100012, China；Department of Environmental
Engineering, Jilin Architectural and Civil Engineering Institute,
Changchun 130021, China; |
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Abstract Effects of human activity on the distribution of phosphorus (P) forms were investigated for the sediments and porewaters in Daqinghe Estuary of Dianchi Lake, China. The concentrations of total P (TP), inorganic-P (I-P), and organic-P (Org-P), and the ratio of iron-bound P (Fe-P)/calcium-bound P (Ca-P) in the sediments decreased with the increasing distance from the sampling site to the estuary. This is probably due to the flocculant materials, e.g., ferric and aluminous salts, usually being added in the wastewater treatment processes. The concentration of ammonia in the sediment porewaters significantly decreased with the increasing distance from the sampling site to the estuary. Both concentrations of total nitrogen and nitrogen in the sediment porewaters decreased to some content with the increasing distance from the sampling site to the estuary. However, the concentrations of nitrate, dissolved total P (DTP), and TP did not have strong relationship with the distances from the sampling sites to the estuary. Pollution load and water quantity also had an important influence on the concentrations of P in sediments and its interstitial water in estuary sedimentary area.
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| Keywords
estuary sedimentary area
phosphorus (P)
spatial distribution
human activity
the Dianchi Lake
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Issue Date: 05 September 2010
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