IHB OpenIR  > 水环境工程研究中心  > 期刊论文
Ferrous Iron Phosphorus in Sediments: Development of a Quantification Method through 2,2 '-Bipyridine Extraction
Li, Qingman1,4; Wang, Xingxiang5; Bartlett, Rebecca4; Pinay, Gilles2,4; Kan, Dan1,3; Zhang, Wen1,3; Sun, Jingxian1,3; Li, QM (reprint author), Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China.
2012-11-01
Source PublicationWATER ENVIRONMENT RESEARCH
ISSN1061-4303
Volume84Issue:11Pages:2037-2044
AbstractThe role of ferrous iron in the phosphorus cycle of an aquatic ecosystem is poorly understood because of a lack of suitable methods to quantitatively evaluate ferrous iron phosphorus (FIP) phases. Using sediments sampled from Fubao Bay of Dianchi Lake in China, a novel extraction method for FIP using 2,2'-bipyridine was explored. Total phosphorus and iron in the sediments ranged from 1.0 to 5.0 mg/g (dry weight) and 28.5 to 90.6 mg/g, respectively. Organic content (as indicated by loss on ignition or LOI) and iron(II) ranged from 3.1 to 27.0% and 26.5 to 64.9 mg/g, respectively. The dissolution dynamics of FIP extraction with a low solid/liquid ratio (1: 25) indicated that a single application of 0.2% 2,2'-bipyridine extracted both iron(II) (Fe(II)) and phosphorus (as PO43-) in sediments with different organic contents with low efficiency. The extraction efficiency of Fe(II) was improved by alteration of the solid/liquid ratio, but the effect was limited. However, addition of a 1:1000 solid/liquid ratio of 0.5 M potassium chloride to a 0.2% 2,2'-bipyridine solution significantly accelerated extraction of FIP with the release of Fe(II) and phosphorus toward equilibrium at approximately 150 hours. Further investigation demonstrated that 2,2'-bipyridine exhibited a higher selectivity in distinguishing FIP from phosphorus bound to ferric (Fe(III)) oxides or precipitated by calcium (Ca2+). Air-drying sediments significantly decreased the amount of extracted FIP, which indicates that fresh, wet sediment should be used in this type of FIP extraction. Based on experimental results using the proposed extraction protocol, (1) FIP in sediments of Fubao Bay had a predominant status in the lake sediment and accounted for 23.4 to 39.8% of total phosphorus, and (2) Fe(II)(FIP) released in the extraction is directly proportional to phosphorus(FIP) (Fe(II)(FIP) = 2.84 x P-FIP + 0.0007; R-2 = 0.97) with an average molar ratio of Fe(II)(FIP)/P-FIP of 2.7. This study shows that FIP extraction with 2,2'-bipyridine is a robust method for releasing ferrous iron associated with phosphorus. Further, the high percentage of FIP in total phosphorus (40%) measured in the study site using this extraction method suggests that FIP might have been often underestimated in previous studies. Water Environ. Res., 84 2037 (2012).; The role of ferrous iron in the phosphorus cycle of an aquatic ecosystem is poorly understood because of a lack of suitable methods to quantitatively evaluate ferrous iron phosphorus (FIP) phases. Using sediments sampled from Fubao Bay of Dianchi Lake in China, a novel extraction method for FIP using 2,2'-bipyridine was explored. Total phosphorus and iron in the sediments ranged from 1.0 to 5.0 mg/g (dry weight) and 28.5 to 90.6 mg/g, respectively. Organic content (as indicated by loss on ignition or LOI) and iron(II) ranged from 3.1 to 27.0% and 26.5 to 64.9 mg/g, respectively. The dissolution dynamics of FIP extraction with a low solid/liquid ratio (1: 25) indicated that a single application of 0.2% 2,2'-bipyridine extracted both iron(II) (Fe(II)) and phosphorus (as PO43-) in sediments with different organic contents with low efficiency. The extraction efficiency of Fe(II) was improved by alteration of the solid/liquid ratio, but the effect was limited. However, addition of a 1:1000 solid/liquid ratio of 0.5 M potassium chloride to a 0.2% 2,2'-bipyridine solution significantly accelerated extraction of FIP with the release of Fe(II) and phosphorus toward equilibrium at approximately 150 hours. Further investigation demonstrated that 2,2'-bipyridine exhibited a higher selectivity in distinguishing FIP from phosphorus bound to ferric (Fe(III)) oxides or precipitated by calcium (Ca2+). Air-drying sediments significantly decreased the amount of extracted FIP, which indicates that fresh, wet sediment should be used in this type of FIP extraction. Based on experimental results using the proposed extraction protocol, (1) FIP in sediments of Fubao Bay had a predominant status in the lake sediment and accounted for 23.4 to 39.8% of total phosphorus, and (2) Fe(II)(FIP) released in the extraction is directly proportional to phosphorus(FIP) (Fe(II)(FIP) = 2.84 x P-FIP + 0.0007; R-2 = 0.97) with an average molar ratio of Fe(II)(FIP)/P-FIP of 2.7. This study shows that FIP extraction with 2,2'-bipyridine is a robust method for releasing ferrous iron associated with phosphorus. Further, the high percentage of FIP in total phosphorus (40%) measured in the study site using this extraction method suggests that FIP might have been often underestimated in previous studies. Water Environ. Res., 84 2037 (2012).
SubtypeArticle
KeywordFerrous Iron Phosphorus Sediment 2,2 '-bipyridine
Department[Li, Qingman; Kan, Dan; Zhang, Wen; Sun, Jingxian] Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China; [Pinay, Gilles] Univ Rennes, OSUR ECOBIO CNRS, F-350242 Rennes, France; [Kan, Dan; Zhang, Wen; Sun, Jingxian] Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China; [Li, Qingman; Bartlett, Rebecca; Pinay, Gilles] Univ Birmingham, Sch Geog Earth & Environm Sci, Birmingham B15 2TT, W Midlands, England; [Wang, Xingxiang] Chinese Acad Sci, Inst Soil Sci, Nanjing 210008, Jiangsu, Peoples R China
DOI10.2175/106143012X13373575830872
WOS HeadingsScience & Technology ; Technology ; Life Sciences & Biomedicine ; Physical Sciences
Funding OrganizationNational Natural Science Foundation of China [40873061] ; National Natural Science Foundation of China [40873061] ; National Natural Science Foundation of China [40873061] ; National Natural Science Foundation of China [40873061]
Indexed BySCI
Language英语
WOS Research AreaEngineering ; Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources
WOS SubjectEngineering, Environmental ; Environmental Sciences ; Limnology ; Water Resources
WOS IDWOS:000311040300005
WOS KeywordLAKE-SEDIMENTS ; DIANCHI LAKE ; WATER ; VIVIANITE ; PHOSPHATE ; RELEASE ; EUTROPHICATION ; ENVIRONMENT ; SIDERITE ; MOBILITY
Funding OrganizationNational Natural Science Foundation of China [40873061] ; National Natural Science Foundation of China [40873061] ; National Natural Science Foundation of China [40873061] ; National Natural Science Foundation of China [40873061]
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Cited Times:6[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ihb.ac.cn/handle/342005/17246
Collection水环境工程研究中心_期刊论文
Corresponding AuthorLi, QM (reprint author), Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China.
Affiliation1.Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China
2.Univ Rennes, OSUR ECOBIO CNRS, F-350242 Rennes, France
3.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
4.Univ Birmingham, Sch Geog Earth & Environm Sci, Birmingham B15 2TT, W Midlands, England
5.Chinese Acad Sci, Inst Soil Sci, Nanjing 210008, Jiangsu, Peoples R China
Recommended Citation
GB/T 7714
Li, Qingman,Wang, Xingxiang,Bartlett, Rebecca,et al. Ferrous Iron Phosphorus in Sediments: Development of a Quantification Method through 2,2 '-Bipyridine Extraction[J]. WATER ENVIRONMENT RESEARCH,2012,84(11):2037-2044.
APA Li, Qingman.,Wang, Xingxiang.,Bartlett, Rebecca.,Pinay, Gilles.,Kan, Dan.,...&Li, QM .(2012).Ferrous Iron Phosphorus in Sediments: Development of a Quantification Method through 2,2 '-Bipyridine Extraction.WATER ENVIRONMENT RESEARCH,84(11),2037-2044.
MLA Li, Qingman,et al."Ferrous Iron Phosphorus in Sediments: Development of a Quantification Method through 2,2 '-Bipyridine Extraction".WATER ENVIRONMENT RESEARCH 84.11(2012):2037-2044.
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