Characteristics and distribution of phosphorus in surface sediments of a shallow lake  

作　　者：Ziwei Long Zehua Ji Yuansheng Pei 

机构地区：[1]State Key Laboratory of Water Environment Simulation,School of Environment,Beijing Normal University,Beijing 100875,China [2]The Key Laboratory of Water and Sediment Sciences,Ministry of Education,School of Environment,Beijing Normal University,Beijing 100875,China

出　　处：《Journal of Environmental Sciences》2023年第2期50-60,共11页环境科学学报（英文版）

基　　金：supported by the Beijing Municipal Science and Technology Plan Project (No. Z181100005518005);the National Natural Science Foundation of China (Nos. 51579009, 51879012);the Major Science and Technology Program for Water Pollution Control and Treatment (No. 2018ZX07110004)

摘　　要：Phosphorus(P)in sediments plays an important role in shallow lake ecosystems and has a major effect on the lake environment.The mobility and bioavailability of P primarily depend on the contents of different P forms,which in turn depend on the sedimentary environment.Here,sediment samples from Baiyangdian(BYD)lake were collected and measured by the Standards,Measurements,and Testing procedure and Phosphorus-31 nuclear magnetic resonance spectroscopy(31P NMR)to characterize different P forms and their relationships with sediment physicochemical properties.The P content in the sediments varied in different areas and had characteristics indicative of exogenous river input.Inorganic P(334–916 mg/kg)was the dominant form of P.The 31P NMR results demonstrated that orthophosphate monoesters(16–110 mg/kg),which may be a source of P when redox conditions change,was the dominant form of organic P(20–305 mg/kg).The distribution of P forms in each region varied greatly because of the effects of anthropogenic activities,and the regions affected by exogenous river input had a higher content of P and a higher risk of P release.Principal component analysis indicated that P bound to Fe,Al,and Mn oxides and hydroxides(NaOH-P)and organic P were mainly derived from industrial and agricultural pollution,respectively.Redundancy analysis indicated that increases in pH lead to the release of NaOH-P.Organic matter plays an important role in the organic P biogeochemical cycle,as it acts as a sink and source of organic P.

关 键 词：SEDIMENT Phosphorus forms SMT 31P NMR 

分 类 号：X524[环境科学与工程—环境工程]