title: [Phosphorus forms of the suspended particulate matter in the Yellow River downstream during water and sediment regulation 2008].
abstract: Suspended particulate matter samples were collected from Lijin Station on the Yellow River during the 2008 water and sediment regulation. Using water elutriation method, samples were physically separated according to grain size, and phosphorus forms were detected by the improved SEDEX technology. Results show that authigenic apatite phosphorus and organic phosphorus are the dominant forms of the particulate phosphorus. During water and sediment regulation, concentrations of total particulate phosphorus, loosely adsorbed phosphorus, organic phosphorus and refractory phosphorus are lower than those in other time of the year, while the concentration of detrital fluorapatite phosphorus is higher than that in other time. Grain size is the primary variable in the determination of the content of various particulate phosphorus forms. In fine particles, loosely adsorbed phosphorus, organic phosphorus and refractory phosphorus concentrations are high, while detrital fluorapatite phosphorus concentration is high in coarse particles. About 28.3% of the total particulate phosphorus is in the form of bio-available phosphorus, of which organic phosphorus is the major component. During the water and sediment regulation, the fluxes of sediment, particulate phosphorus and particulate bio-available phosphorus are 6.63 x 10(7) t, 3.42 x 10(4) t, and 8.30 x 10(3) t, which are 83.2%, 78.6%, and 80.2% each of the total fluxes in 2008.
authors.affiliation: Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, China. junfengwei@yahoo.cn
authors.forename: Jun-Feng
authors.initials: JF
authors.lastname: Wei
authors.forename: Hong-Tao
authors.initials: HT
authors.lastname: Chen
authors.forename: Yue-Liang
authors.initials: YL
authors.lastname: Liu
authors.forename: Kai
authors.initials: K
authors.lastname: Shan
authors.forename: Qing-Zhen
authors.initials: QZ
authors.lastname: Yao
authors.forename: Hui-Jun
authors.initials: HJ
authors.lastname: He
authors.forename: Zhi-Gang
authors.initials: ZG
authors.lastname: Yu
mesh_terms: D002681:China; D017753:Ecosystem; D004784:Environmental Monitoring / Q000379:methods*; D019015:Geologic Sediments / Q000737:chemistry*; D010316:Particle Size; D010758:Phosphorus / Q000032:analysis / Q000737:chemistry*; D045483:Rivers / Q000737:chemistry; D014872:Water Movements
chemical_list: D010758:Phosphorus