An innovative approach for sequential extraction of phosphorus in sediments: Ferrous iron P as an independent P fraction
文献类型：期刊论文
| 作者 | Gu, Sen1,2; Qian, Yiguang1; Jiao, Yang1; Li, Qingman1; Pinay, Gilles3; Gruau, Gerard3 |
| 刊名 | WATER RESEARCH
 |
| 出版日期 | 2016-10-15 |
| 卷号 | 103页码:352-361 |
| 关键词 | Phosphorus fractionation Ferrous iron phosphorus SEDEX Vivianite Geochemical process |
| ISSN号 | 0043-1354 |
| 英文摘要 | Accurate identification of phosphorus (P) forms is crucially important for understanding the geochemical cycle of P; however, until now the role of ferrous iron P (Fe(II)-P) buried in sediments has been completely ignored in nearly all sequential extraction procedures developed. Using sediment cores sampled from Donghu Lake in Wuhan, China, this study explored a modified version of widely used sequential P extraction method (SEDEX; Ruttenberg, 1992) in which Fe(II)-P was identified as an independent fraction. Based on the high selectivity of the extractant (0.2% 2,2' bipyridine+0.1 M KCl) and the dissolution equilibrium of 13, procedures for extracting Fe(II)-P were optimized using a 1:100 solid:liquid ratio and extraction at 50 +/- 1 degrees C for 24 h. The sedimentary P extracted was divided into five fractions: loosely-bound P, Fe(II)-P, CDB-P, Ca-P and O-P. Fe(II)-P was the predominant fraction in fresh sediments in Donghu Lake, accounting for 15.7-49.9% of TP, with a mean of 31.6%. The mean values of Ca-P, O-P, CDB-P and loosely-bound P were 28.4%, 22.7%, 17.1% and 4.3%, respectively. Combined with component analysis of extracts and recovery experiments of standard reference minerals (vivianite, Fe-3(PO4)(2)center dot 8H(2)O) in natural sediments, extraction of Fe(II)-P with 0.2% 2,2-bipridine and 0.1 M KCl was robust, with a good recovery rate (88.7-100.6%) and little of the Ca-P dissolved. It is possible to use this innovative SEDEX not only to distinguish the contribution of different P matrices in fresh sediments, but also to investigate the transformation of sedimentary P under different redox conditions. Therefore, greater focus on Fe(II)-P is necessary, because it is a major sink for the geochemical process of sedimentary P. (C) 2016 Elsevier Ltd. All rights reserved. |
| WOS标题词 | Science & Technology ; Technology ; Life Sciences & Biomedicine ; Physical Sciences |
| 类目[WOS] | Engineering, Environmental ; Environmental Sciences ; Water Resources |
| 研究领域[WOS] | Engineering ; Environmental Sciences & Ecology ; Water Resources |
| 关键词[WOS] | MARINE-SEDIMENTS ; LAKE ; PHOSPHATE ; FORMS ; CYCLE ; MOBILIZATION ; SOLUBILITY ; SPECIATION ; EFFICIENCY ; DEPENDENCE |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000383292100038 |
| 源URL | [http://ir.ihb.ac.cn/handle/342005/28361]  |
| 专题 | 水生生物研究所_水生生物多样性与资源保护研究中心_学位论文 |
| 作者单位 | 1.Chinese Acad Sci, Inst Hydrobiol, 7 Donghu South Rd, Wuhan 430072, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China 3.Univ Rennes 1, CNRS, OSUR, F-35042 Rennes, France |
| 推荐引用方式 GB/T 7714 | Gu, Sen,Qian, Yiguang,Jiao, Yang,et al. An innovative approach for sequential extraction of phosphorus in sediments: Ferrous iron P as an independent P fraction[J]. WATER RESEARCH,2016,103:352-361. |
| APA | Gu, Sen,Qian, Yiguang,Jiao, Yang,Li, Qingman,Pinay, Gilles,&Gruau, Gerard.(2016).An innovative approach for sequential extraction of phosphorus in sediments: Ferrous iron P as an independent P fraction.WATER RESEARCH,103,352-361. |
| MLA | Gu, Sen,et al."An innovative approach for sequential extraction of phosphorus in sediments: Ferrous iron P as an independent P fraction".WATER RESEARCH 103(2016):352-361. |
入库方式： OAI收割
来源：水生生物研究所
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