High-resolution imaging of labile phosphorus and its relationship with iron redox state in lake sediments
文献类型：期刊论文
| 作者 | Gao, Yulu1,2; Liang, Tao1,2 ; Tian, Shuhan1,2; Wang, Lingqing2; Holm, Peter E.1,3; Hansen, Hans Christian Bruun1,3
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| 刊名 | ENVIRONMENTAL POLLUTION
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| 出版日期 | 2016-12-01 |
| 卷号 | 219页码:466-474 |
| ISSN号 | 0269-7491 |
| 关键词 | Phosphorus Iron DGT High resolution Sediment-water interface |
| DOI | 10.1016/j.envpol.2016.05.053 |
| 通讯作者 | Liang, Tao(liangt@igsnrr.ac.cn) |
| 英文摘要 | A thorough understanding of the labile status and dynamics of phosphorus (P) and iron (Fe) across the sediment-water interface (SWI) is essential for managing internal P release in eutrophic lakes. Fe coupled inactivation of P in sediments is an important factor which affects internal P release in freshwater lakes. In this study, two in-situ high-resolution diffusive gradients in thin films (DGT) techniques, Zr-Oxide DGT and ZrO-Chelex DGT, were used to investigate the release characteristics of P from sediments in a large freshwater lake (Dongting Lake, China; area of 2691 km(2)) experiencing a regional summer algal bloom. Two-dimensional distributions of labile P in sediments were imaged with the ZrOxide DGT without destruction of the original structure of the sediment layer at four sites of the lake. The concentration of DGT-labile P in the sediments, ranging from 0.007 to 0.206 mg L-1, was highly heterogeneous across the profiles. The values of apparent diffusion flux (F-d) and release flux (F-r) of P varied between-0.027-0.197 mg m(-2) d(-1), and 0.037-0.332 mg m(-2) d(-1), respectively. Labile P showed a high and positive correlation (p < 0.01) with labile Fe(II) in the profiles, providing high-resolution evidence for the key role of Fe-redox cycling in labile P variation in sediments. (C) 2016 Elsevier Ltd. All rights reserved. |
| WOS关键词 | DISSOLVED REACTIVE PHOSPHORUS ; THIN-FILMS TECHNIQUE ; RARE-EARTH-ELEMENTS ; DIFFUSIVE GRADIENTS ; IN-SITU ; SHALLOW LAKES ; PORE-WATER ; PHOSPHATE RELEASE ; AEROBIC SEDIMENTS ; MOBILE PHOSPHORUS |
| 资助项目 | National Key Project for Basic Research[2012CB417004] |
| WOS研究方向 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| 出版者 | ELSEVIER SCI LTD |
| WOS记录号 | WOS:000390734100053 |
| 资助机构 | National Key Project for Basic Research |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/65308]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Liang, Tao |
| 作者单位 | 1.Sino Danish Ctr Educ & Res, Aarhus, Denmark 2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Land Surface Pattern & Simulat, Beijing 100101, Peoples R China 3.Univ Copenhagen, Dept Plant & Environm Sci, Thorvaldsensvej 40, DK-1871 Frederiksberg C, Denmark |
| 推荐引用方式 GB/T 7714 | Gao, Yulu,Liang, Tao,Tian, Shuhan,et al. High-resolution imaging of labile phosphorus and its relationship with iron redox state in lake sediments[J]. ENVIRONMENTAL POLLUTION,2016,219:466-474. |
| APA | Gao, Yulu,Liang, Tao,Tian, Shuhan,Wang, Lingqing,Holm, Peter E.,&Hansen, Hans Christian Bruun.(2016).High-resolution imaging of labile phosphorus and its relationship with iron redox state in lake sediments.ENVIRONMENTAL POLLUTION,219,466-474. |
| MLA | Gao, Yulu,et al."High-resolution imaging of labile phosphorus and its relationship with iron redox state in lake sediments".ENVIRONMENTAL POLLUTION 219(2016):466-474. |
入库方式： OAI收割
来源：地理科学与资源研究所
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