title: Composition of phosphorus in wetland soils determined by SMT and solution 31P-NMR analyses.
abstract: In Eastern China, wetlands are common in the lower reaches of catchments or in coastal zones. Wetlands are at risk from eutrophication because of the large quantities of phosphorus (P) they receive from rivers. They are also decreasing in size. In this contribution, we present information about the composition of P in wetland soils, obtained using the Standards, Measurements, and Testing (SMT) protocol and (31)P-nuclear magnetic resonance (NMR) spectroscopy. Average P concentrations varied in the different wetland soils and, in four of the five wetlands sampled, exceeded 500 mg∙kg(-1). HCl-inorganic P (Pi) was the main Pi fraction in wetland soils. The percentage contribution of Pi (89.7 %) to total P was the highest in the Yangtze River estuary wetland. Six P components were detected by (31)P-NMR analysis. Mono-P was the main organic P (Po) in wetland soils. Orthophosphate (Ortho-P) was positively and negatively related to NaOH-Pi (R (2) = 0.957, p < 0.001) and HCl-Pi (R (2) = -0.689, p < 0.001), respectively. Orthophosphate monoesters (Mono-P) were positively related to Po (R (2) = 0.617, p < 0.001) and ortho-P (R (2) = 0.624, p < 0.001), respectively. The main Po component was Mono-P, and it may be mineralized to ortho-P under the frequently changing redox conditions in wetland soils. The information from this study will support the development of robust scientific and effective policy for P management in wetlands.
authors.affiliation: State Key Laboratory on Environmental Aquatic Chemistry, Research Center for Eco-Environmental Science, Chinese Academy of Science, Beijing, 100085, People's Republic of China.
authors.forename: Wenqiang
authors.initials: W
authors.lastname: Zhang
authors.affiliation: State Key Laboratory on Environmental Aquatic Chemistry, Research Center for Eco-Environmental Science, Chinese Academy of Science, Beijing, 100085, People's Republic of China.|University of Chinese Academy of Science, Beijing, 100049, People's Republic of China.
authors.forename: Xin
authors.initials: X
authors.lastname: Jin
authors.affiliation: State Key Laboratory on Environmental Aquatic Chemistry, Research Center for Eco-Environmental Science, Chinese Academy of Science, Beijing, 100085, People's Republic of China.|University of Chinese Academy of Science, Beijing, 100049, People's Republic of China.
authors.forename: Yuekui
authors.initials: Y
authors.lastname: Ding
authors.affiliation: State Key Laboratory on Environmental Aquatic Chemistry, Research Center for Eco-Environmental Science, Chinese Academy of Science, Beijing, 100085, People's Republic of China.|University of Chinese Academy of Science, Beijing, 100049, People's Republic of China.
authors.forename: Xiaolei
authors.initials: X
authors.lastname: Zhu
authors.affiliation: State Key Laboratory on Environmental Aquatic Chemistry, Research Center for Eco-Environmental Science, Chinese Academy of Science, Beijing, 100085, People's Republic of China.|University of Chinese Academy of Science, Beijing, 100049, People's Republic of China.
authors.forename: Nan
authors.initials: N
authors.lastname: Rong
authors.affiliation: State Key Laboratory on Environmental Aquatic Chemistry, Research Center for Eco-Environmental Science, Chinese Academy of Science, Beijing, 100085, People's Republic of China.|University of Chinese Academy of Science, Beijing, 100049, People's Republic of China.
authors.forename: Jie
authors.initials: J
authors.lastname: Li
authors.affiliation: State Key Laboratory on Environmental Aquatic Chemistry, Research Center for Eco-Environmental Science, Chinese Academy of Science, Beijing, 100085, People's Republic of China. bqshan@rcees.ac.cn.
authors.forename: Baoqing
authors.initials: B
authors.lastname: Shan
mesh_terms: D002681:China; D004784:Environmental Monitoring; D063366:Estuaries; D005068:Eutrophication; D008279:Magnetic Resonance Imaging; D009682:Magnetic Resonance Spectroscopy / Q000379:methods; D010710:Phosphates / Q000032:analysis; D010758:Phosphorus / Q000032:analysis*; D045483:Rivers; D012987:Soil / Q000737:chemistry*; D012989:Soil Pollutants / Q000032:analysis*; D012996:Solutions; D053833:Wetlands
chemical_list: D010710:Phosphates; D012987:Soil; D012989:Soil Pollutants; D012996:Solutions; D010758:Phosphorus
keywords: Organic phosphorus; P-NMR; Phosphorus; SMT; Soil; Wetland
references.citation: Environ Sci Technol. 2015 Jun 2;49(11):6385-93
references.pmid: 25955310
references.citation: Nature. 2012 Oct 18;490(7420):388-92
references.pmid: 23075989
references.citation: Talanta. 2005 Apr 15;66(2):359-71
references.pmid: 18969999
references.citation: Environ Sci Technol. 2010 Dec 15;44(24):9265-71
references.pmid: 21090603
references.citation: Philos Trans R Soc Lond B Biol Sci. 2002 Apr 29;357(1420):449-69
references.pmid: 12028785
references.citation: Environ Sci Technol. 2012 May 15;46(10):5294-301
references.pmid: 22401269
references.citation: Environ Sci Technol. 2006 Feb 1;40(3):727-33
references.pmid: 16509310
references.citation: Analyst. 1976 Mar;101(1200):187-97
references.pmid: 1259177
references.citation: Talanta. 2005 Apr 15;66(2):294-306
references.pmid: 18969994
references.citation: J Environ Qual. 2006 Jan 05;35(1):293-302
references.pmid: 16397105
references.citation: J Environ Monit. 1999 Feb;1(1):51-6
references.pmid: 11529079
references.citation: Fresenius J Anal Chem. 2001 Jun;370(2-3):224-8
references.pmid: 11451241
references.citation: Environ Sci Technol. 2006 Dec 15;40(24):7874-80
references.pmid: 17256541
references.citation: Environ Sci Technol. 2005 Feb 1;39(3):867-72
references.pmid: 15757351
references.citation: J Environ Monit. 2001 Feb;3(1):121-5
references.pmid: 11253004
references.citation: Environ Sci Technol. 2012 Oct 2;46(19):10572-8
references.pmid: 22994917
references.citation: Environ Sci Technol. 2008 Dec 15;42(24):8994
references.pmid: 19174861
references.citation: Environ Sci Technol. 2012 May 1;46(9):4775-82
references.pmid: 22423890
references.citation: Environ Pollut. 2009 Aug-Sep;157(8-9):2507-13
references.pmid: 19345456
references.citation: Proc Natl Acad Sci U S A. 2008 Aug 12;105(32):11039-40
references.pmid: 18685114
references.citation: Nature. 2001 May 17;411(6835):258
references.pmid: 11357117