Phosphorus Distribution in Lake Sediments and Interstitial Water in Different Ecological Function Zones
Zhibin Zhang1, Xiaorui Zhang1, Yinghui Sui2, Yanhao Zhang1, Meng Wang1, Yufeng Lv1
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1College of Environmental and Municipal Engineering,
Shandong Jianzhu University, Jinan, 250101, China
2Department of Earth, Atmospheric, and Planetary Sciences, Purdue University,
West Lafayette, IN 47907 USA
Pol. J. Environ. Stud. 2014;23(5):1831-1836
For shallow lakes, phosphorus released from sediments becomes a major reason for eutrophication. To learn about the distribution characteristics of sedimentary phosphorous in Nansi Lake, China, the vertical distributions of sedimentary phosphorus at 5 representative sites were analyzed. The results showed that the sedimentary total phosphorus (TP) concentrations varied greatly, ranging from 313.50 to 963.48 mg·kg-1. As a typical macrophyte-dominated lake, organic phosphorus (Org-P) in Nansi Lake was the major phosphorus accounting for 41.56-52.60% of TP in sediment. Detrital apatite phosphorus (De-P) and authigenic calciumbound phosphorus (ACa-P) also represented a large proportion of TP in sediments, accounting for 14.77- 35.24% and 1.4-32.09% of TP, respectively. The vertical phosphorus distribution demonstrated a trend that Ex- P, Fe-P, Oc-P Org-P, and TP values decreased gradually with depth, Al-P and ACa-P decreased first and then increased with depth, and De-P had no obvious trend with depth. The results also indicated that the concentrations of PO43--P in interstitial water and the concentrations of Ex-P in sediments had a remarkable positive correlation.
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