Ferrous Iron Phosphorus in Sediments: Development of a Quantification Method through 2,2 '-Bipyridine Extraction
文献类型：期刊论文
| 作者 | Li, Qingman1,4; Wang, Xingxiang5; Bartlett, Rebecca4; Pinay, Gilles2,4; Kan, Dan1,3; Zhang, Wen1,3; Sun, Jingxian1,3 |
| 刊名 | WATER ENVIRONMENT RESEARCH
 |
| 出版日期 | 2012-11-01 |
| 卷号 | 84期号:11页码:2037-2044 |
| 关键词 | ferrous iron phosphorus sediment 2 2 '-bipyridine |
| ISSN号 | 1061-4303 |
| 通讯作者 | Li, QM (reprint author), Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China. |
| 中文摘要 | 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). |
| 英文摘要 | 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). |
| WOS标题词 | Science & Technology ; Technology ; Life Sciences & Biomedicine ; Physical Sciences |
| 类目[WOS] | Engineering, Environmental ; Environmental Sciences ; Limnology ; Water Resources |
| 研究领域[WOS] | Engineering ; Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources |
| 关键词[WOS] | LAKE-SEDIMENTS ; DIANCHI LAKE ; WATER ; VIVIANITE ; PHOSPHATE ; RELEASE ; EUTROPHICATION ; ENVIRONMENT ; SIDERITE ; MOBILITY |
| 收录类别 | SCI |
| 资助信息 | National Natural Science Foundation of China [40873061] |
| 语种 | 英语 |
| WOS记录号 | WOS:000311040300005 |
| 公开日期 | 2013-01-09 |
| 源URL | [http://ir.ihb.ac.cn/handle/342005/17246]  |
| 专题 | 水生生物研究所_水环境工程研究中心_期刊论文 |
| 作者单位 | 1.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 |
| 推荐引用方式 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.,...&Sun, Jingxian.(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. |
入库方式： OAI收割
来源：水生生物研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。