Geochemical characteristics of phosphorus in surface sediments of two major Chinese mariculture areas: The Laizhou Bay and the coastal waters of the Zhangzi Island |
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| Authors: | Wen Zhuang Xuelu Gao Yong Zhang Qianguo Xing Luigi Tosi Song Qin |
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| Institution: | 1. Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, Shandong 264003, China;2. College of City and Architecture Engineering, Zaozhuang University, Zaozhuang, Shandong 277160, China;3. University of Chinese Academy of Sciences, Beijing 100049, China;4. Institute of Marine Sciences, National Research Council, Arsenale-Tesa 104, Castello 2737/F, 30122 Venice, Italy |
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| Abstract: | Phosphorus (P) in surface sediments of the Laizhou Bay (LB) and the coastal waters around the Zhangzi Island (ZI) was analyzed. Six forms of P were separated — exchangeable or loosely sorbed P (Ads–P), aluminum-bound P (Al–P), iron-bound P (Fe–P), authigenic apatite plus CaCO3-bound P plus biogenic apatite (Ca–P), detrital apatite plus other inorganic P (De–P) and organic P (OP). The average contents of P in the LB were in the order: De–P > OP > Ca–P > Fe–P > Ads–P > Al–P; in the ZI, the corresponding order was De–P > OP > Fe–P > Ca–P > Ads–P > Al–P. Due to the high nutrient loadings from the surrounding rivers, TP contents in sediments of the LB were higher than in those of the ZI. The potential bio-available P (Ads–P and OP) accounted for 14.7% and 24.2% of TP in sediments of the LB and the ZI, respectively. |
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| Keywords: | Sequential extraction Surface sediment Phosphorus fractionation Geochemical characteristics Marine aquaculture area China |
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