Phosphorus Fractionation in Core Sediments from Haihe River Mainstream,China |
| |
| Authors: | Lu Han Suiliang Huang C D Stanley T Z Osborne |
| |
| Institution: | 1. Numerical Simulation Group for Water Environment, Key Laboratory of Pollution Processes and Environmental Criteria of Ministry of Education, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering , Nankai University , Tianjin, China;2. Gulf Coast Research and Education Center, Soil and Water Science Department, Institute of Food and Agricultural Sciences , University of Florida , Wimauma, Florida, USA;3. Wetland Biogeochemistry Laboratory, Soil and Water Science Department , University of Florida , Gainesville, Florida, USA |
| |
| Abstract: | Sediments from Haihe River mainstream, located in Xingjiaquan, Zhangjiazui, Tianjin, were collected and examined on the basis of P fractionation. SMT (standards, measurements and testing) procedure was adopted to investigate the changes in P concentration with depth in the core sediments collected from the different sampling sites of Haihe River mainstream. The relationships among different P fractions, such as exchangeable P (Ex-P), metal oxide bounded P (NaOH-P), organic matter and grain size, were also discussed. The results indicate that in both sites the rank order of P fractions was HCl-P > Organic P (OP) > NaOH-P > Ex-P in terms of their concentration. The Ex-P represented < 4% of the sediment total P, while the NaOH-P ranged 5–21%. The calcium bound phosphorus (HCl-P) showed considerable contribution (53–80%) to the sediment total P loads. Silt/clay sized sediments exhibited significantly higher concentrations of HCl-P and Ex-P in both sites. However, coarse-sand-sized sediments exhibited significantly higher concentrations of OP in both sites and NaOH-P in Xingjiaquan. Multivariate statistics were performed to identify the factors that influenced the sediment P. |
| |
| Keywords: | sediment phosphorus lake fraction |
|
|
