title: [Seasonal variation characteristics of phosphorus speciation in the sediment of Changshou Lake].
abstract: To further know the seasonal variation characteristics of phosphorus species in lake sediment, the contents of different phosphorus species in the surface sediment sampling from Changshou Lake were determined by using the SMT sequential extraction method in July and November, 2009, and March, 2010. The contents of total phosphorus (TP) basically show an order of the low-water period, high-water period, and normal-water period from high to low, and the maximum appeared in Shoudao (2960.29 mg/kg) while the minimum in Guanjiakou (586.05 mg/kg). The mass fractions of phosphorus associated with hydrous ferric/aluminum oxides (Fe/Al-P) and organic phosphorus (OP) in TP at all sampling sits are in an order of the normal-water period, high-water period, and low-water period from high to low, and the maximum of Fe/Al-P appeared in Lewen (40.01%) while that of OP in the dam mouth (72.44%). The mass fraction of phosphorus bound to calcium salt (Ca-P) in TP is in an order of the low-water period, normal-water period, and high-water period, and the maximum appeared in Baibudang (15.52%). These results suggested that the phosphorus speciation in the sediment of Changshou Lake shows obviously temporal and spatial distribution characteristics, and Fe/Al-P is mainly influenced by pH of the overlying water, while OP is not apparently influenced by dissolved oxygen (DO).
authors.affiliation: Chongqing Key Laboratory of Agricultural Resources and Environment, Ministry of Education, College of Resources and Environment, Southwest University, Chongqing 400716, China. guohaitao1943@126.com
authors.forename: Hai-Tao
authors.initials: HT
authors.lastname: Guo
authors.forename: Jin-Zhong
authors.initials: JZ
authors.lastname: Zhang
authors.forename: Shi-Qiang
authors.initials: SQ
authors.lastname: Wei
authors.forename: De-Ti
authors.initials: DT
authors.lastname: Xie
authors.forename: Jian-Cheng
authors.initials: JC
authors.lastname: Che
mesh_terms: D002681:China; D004784:Environmental Monitoring; D005618:Fresh Water / Q000032:analysis; D019015:Geologic Sediments / Q000737:chemistry*; D010755:Organophosphates / Q000737:chemistry; D010758:Phosphorus / Q000737:chemistry*; D012621:Seasons; D014874:Water Pollutants, Chemical / Q000737:chemistry*
chemical_list: D010755:Organophosphates; D014874:Water Pollutants, Chemical; D010758:Phosphorus