Remobilization mechanism and release characteristics of phosphorus in saline sediments from the Pearl River Estuary (PRE), South China, based on high -resolution measurements
被引:37
作者:
Gao, Lei
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Sun Yat Sen Univ, Sch Geog & Planning, Guangzhou 510275, Peoples R ChinaSun Yat Sen Univ, Sch Geog & Planning, Guangzhou 510275, Peoples R China
Gao, Lei
[1
]
Li, Rui
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Sun Yat Sen Univ, Sch Geog & Planning, Guangzhou 510275, Peoples R ChinaSun Yat Sen Univ, Sch Geog & Planning, Guangzhou 510275, Peoples R China
Li, Rui
[1
]
Liang, Zuobing
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Sun Yat Sen Univ, Sch Geog & Planning, Guangzhou 510275, Peoples R ChinaSun Yat Sen Univ, Sch Geog & Planning, Guangzhou 510275, Peoples R China
Liang, Zuobing
[1
]
Yan, Chang
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Sun Yat Sen Univ, Sch Geog & Planning, Guangzhou 510275, Peoples R ChinaSun Yat Sen Univ, Sch Geog & Planning, Guangzhou 510275, Peoples R China
Yan, Chang
[1
]
Zhu, Aiping
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Sun Yat Sen Univ, Sch Geog & Planning, Guangzhou 510275, Peoples R ChinaSun Yat Sen Univ, Sch Geog & Planning, Guangzhou 510275, Peoples R China
Zhu, Aiping
[1
]
Li, Shaoheng
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Sun Yat Sen Univ, Sch Geog & Planning, Guangzhou 510275, Peoples R ChinaSun Yat Sen Univ, Sch Geog & Planning, Guangzhou 510275, Peoples R China
Li, Shaoheng
[1
]
Yang, Zhigang
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Sun Yat Sen Univ, Sch Geog & Planning, Guangzhou 510275, Peoples R ChinaSun Yat Sen Univ, Sch Geog & Planning, Guangzhou 510275, Peoples R China
Yang, Zhigang
[1
]
He, Haijun
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机构:
Guangzhou Marine Geol Survey, Guangzhou 510760, Peoples R ChinaSun Yat Sen Univ, Sch Geog & Planning, Guangzhou 510275, Peoples R China
He, Haijun
[2
]
Gan, Huayang
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机构:
Guangzhou Marine Geol Survey, Guangzhou 510760, Peoples R ChinaSun Yat Sen Univ, Sch Geog & Planning, Guangzhou 510275, Peoples R China
Gan, Huayang
[2
]
Chen, Jianyao
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Sun Yat Sen Univ, Sch Geog & Planning, Guangzhou 510275, Peoples R ChinaSun Yat Sen Univ, Sch Geog & Planning, Guangzhou 510275, Peoples R China
Chen, Jianyao
[1
]
机构:
[1] Sun Yat Sen Univ, Sch Geog & Planning, Guangzhou 510275, Peoples R China
[2] Guangzhou Marine Geol Survey, Guangzhou 510760, Peoples R China
Pearl River Estuary (PRE);
Diffusive gradients in thin-films (DGT);
Fe-coupled P mobilization;
Decoupling of Fe-P cycling;
Diffusion flux;
IN-SITU;
LABILE PHOSPHORUS;
PORE-WATER;
DISSOLVED SULFIDE;
ORGANIC-MATTER;
LAKE-SEDIMENTS;
IRON;
PHOSPHATE;
MOBILIZATION;
SPECIATION;
D O I:
10.1016/j.scitotenv.2019.134411
中图分类号:
X [环境科学、安全科学];
学科分类号:
08 ;
0830 ;
摘要:
The internal loading of phosphorus (P) is commonly considered an essential factor contributing to eutrophication in freshwater bodies. However, investigation of the lability and remobilization characteristics of P in estuarine saline sediments has been limited. In this study, a sequential chemical extraction procedure and high-resolution measurement using the diffusive gradients in thin film (DGT) technique were employed to explore the lability, potential remobilization mechanism and release characteristics of sediment P in the Pearl River Estuary (PRE), South China. The P accumulated significantly in sediments along the west coast of the PRE due to the combined effects of terrestrial P inputs and specific hydrological conditions. The geochemical fractions of sediment P followed the order of organic P (Org-P) (mean: 58.6%) > iron-bound P (Fe-P) (23.4%) > calcium-bound P (Ca-P) (17.4%) > loosely bound P (LS-P) (0.63%). Synchronous vertical variations in DGT-labile Fe and Pin the upper and middle parts of the sediment profiles confirmed that Fe-coupled P mobilization occurred in saline sediments. In contrast, sulfate reduction in bottom sediments supposed to decouple the Fe-P cycling relationship. Additionally, the formation of an "iron curtain" (Fe oxyhydroxides) in the oxic surface sediments efficiently prevented upward diffusion of P, leading to relatively low effluxes of P (0.098-6.59 ng cm 2 d 1) across the sediment-water interface. (C) 2019 Elsevier B.V. All rights reserved.
机构:
Chinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, Guiyang 550081, Guizhou, Peoples R China
Univ Chinese Acad Sci, Beijing 100049, Peoples R ChinaChinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, Guiyang 550081, Guizhou, Peoples R China
Chen, Quan
;
Chen, Jingan
论文数: 0引用数: 0
h-index: 0
机构:
Chinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, Guiyang 550081, Guizhou, Peoples R ChinaChinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, Guiyang 550081, Guizhou, Peoples R China
Chen, Jingan
;
Wang, Jingfu
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h-index: 0
机构:
Chinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, Guiyang 550081, Guizhou, Peoples R ChinaChinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, Guiyang 550081, Guizhou, Peoples R China
Wang, Jingfu
;
Guo, Jianyang
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h-index: 0
机构:
Chinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, Guiyang 550081, Guizhou, Peoples R ChinaChinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, Guiyang 550081, Guizhou, Peoples R China
Guo, Jianyang
;
Jin, Zuxue
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机构:
Chinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, Guiyang 550081, Guizhou, Peoples R China
Guizhou Univ, Coll Resource & Environm Engn, Guiyang 550025, Guizhou, Peoples R ChinaChinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, Guiyang 550081, Guizhou, Peoples R China
Jin, Zuxue
;
Yu, Pingping
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h-index: 0
机构:
Chinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, Guiyang 550081, Guizhou, Peoples R China
Guizhou Univ, Coll Resource & Environm Engn, Guiyang 550025, Guizhou, Peoples R ChinaChinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, Guiyang 550081, Guizhou, Peoples R China
Yu, Pingping
;
Ma, Zhenzhen
论文数: 0引用数: 0
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机构:
Chinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, Guiyang 550081, Guizhou, Peoples R China
Xian Univ Sci & Technol, Xian 710054, Shaanxi, Peoples R ChinaChinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, Guiyang 550081, Guizhou, Peoples R China
机构:
Xiamen Univ, Environm Sci Res Ctr, State Key Lab Marine Environm Sci, Xiamen 361005, Peoples R ChinaXiamen Univ, Environm Sci Res Ctr, State Key Lab Marine Environm Sci, Xiamen 361005, Peoples R China
Dai, Minhan
;
Guo, Xianghui
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h-index: 0
机构:Xiamen Univ, Environm Sci Res Ctr, State Key Lab Marine Environm Sci, Xiamen 361005, Peoples R China
Guo, Xianghui
;
Zhai, Weidong
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机构:Xiamen Univ, Environm Sci Res Ctr, State Key Lab Marine Environm Sci, Xiamen 361005, Peoples R China
Zhai, Weidong
;
Yuan, Liangying
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机构:Xiamen Univ, Environm Sci Res Ctr, State Key Lab Marine Environm Sci, Xiamen 361005, Peoples R China
Yuan, Liangying
;
Wang, Bengwang
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机构:Xiamen Univ, Environm Sci Res Ctr, State Key Lab Marine Environm Sci, Xiamen 361005, Peoples R China
Wang, Bengwang
;
Wang, Lifang
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机构:Xiamen Univ, Environm Sci Res Ctr, State Key Lab Marine Environm Sci, Xiamen 361005, Peoples R China
Wang, Lifang
;
Cai, Pinghe
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h-index: 0
机构:Xiamen Univ, Environm Sci Res Ctr, State Key Lab Marine Environm Sci, Xiamen 361005, Peoples R China
Cai, Pinghe
;
Tang, Tiantian
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h-index: 0
机构:Xiamen Univ, Environm Sci Res Ctr, State Key Lab Marine Environm Sci, Xiamen 361005, Peoples R China
Tang, Tiantian
;
Cai, Wei-Jun
论文数: 0引用数: 0
h-index: 0
机构:Xiamen Univ, Environm Sci Res Ctr, State Key Lab Marine Environm Sci, Xiamen 361005, Peoples R China
机构:
Chinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, Guiyang 550081, Guizhou, Peoples R China
Univ Chinese Acad Sci, Beijing 100049, Peoples R ChinaChinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, Guiyang 550081, Guizhou, Peoples R China
Chen, Quan
;
Chen, Jingan
论文数: 0引用数: 0
h-index: 0
机构:
Chinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, Guiyang 550081, Guizhou, Peoples R ChinaChinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, Guiyang 550081, Guizhou, Peoples R China
Chen, Jingan
;
Wang, Jingfu
论文数: 0引用数: 0
h-index: 0
机构:
Chinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, Guiyang 550081, Guizhou, Peoples R ChinaChinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, Guiyang 550081, Guizhou, Peoples R China
Wang, Jingfu
;
Guo, Jianyang
论文数: 0引用数: 0
h-index: 0
机构:
Chinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, Guiyang 550081, Guizhou, Peoples R ChinaChinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, Guiyang 550081, Guizhou, Peoples R China
Guo, Jianyang
;
Jin, Zuxue
论文数: 0引用数: 0
h-index: 0
机构:
Chinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, Guiyang 550081, Guizhou, Peoples R China
Guizhou Univ, Coll Resource & Environm Engn, Guiyang 550025, Guizhou, Peoples R ChinaChinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, Guiyang 550081, Guizhou, Peoples R China
Jin, Zuxue
;
Yu, Pingping
论文数: 0引用数: 0
h-index: 0
机构:
Chinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, Guiyang 550081, Guizhou, Peoples R China
Guizhou Univ, Coll Resource & Environm Engn, Guiyang 550025, Guizhou, Peoples R ChinaChinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, Guiyang 550081, Guizhou, Peoples R China
Yu, Pingping
;
Ma, Zhenzhen
论文数: 0引用数: 0
h-index: 0
机构:
Chinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, Guiyang 550081, Guizhou, Peoples R China
Xian Univ Sci & Technol, Xian 710054, Shaanxi, Peoples R ChinaChinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, Guiyang 550081, Guizhou, Peoples R China
机构:
Xiamen Univ, Environm Sci Res Ctr, State Key Lab Marine Environm Sci, Xiamen 361005, Peoples R ChinaXiamen Univ, Environm Sci Res Ctr, State Key Lab Marine Environm Sci, Xiamen 361005, Peoples R China
Dai, Minhan
;
Guo, Xianghui
论文数: 0引用数: 0
h-index: 0
机构:Xiamen Univ, Environm Sci Res Ctr, State Key Lab Marine Environm Sci, Xiamen 361005, Peoples R China
Guo, Xianghui
;
Zhai, Weidong
论文数: 0引用数: 0
h-index: 0
机构:Xiamen Univ, Environm Sci Res Ctr, State Key Lab Marine Environm Sci, Xiamen 361005, Peoples R China
Zhai, Weidong
;
Yuan, Liangying
论文数: 0引用数: 0
h-index: 0
机构:Xiamen Univ, Environm Sci Res Ctr, State Key Lab Marine Environm Sci, Xiamen 361005, Peoples R China
Yuan, Liangying
;
Wang, Bengwang
论文数: 0引用数: 0
h-index: 0
机构:Xiamen Univ, Environm Sci Res Ctr, State Key Lab Marine Environm Sci, Xiamen 361005, Peoples R China
Wang, Bengwang
;
Wang, Lifang
论文数: 0引用数: 0
h-index: 0
机构:Xiamen Univ, Environm Sci Res Ctr, State Key Lab Marine Environm Sci, Xiamen 361005, Peoples R China
Wang, Lifang
;
Cai, Pinghe
论文数: 0引用数: 0
h-index: 0
机构:Xiamen Univ, Environm Sci Res Ctr, State Key Lab Marine Environm Sci, Xiamen 361005, Peoples R China
Cai, Pinghe
;
Tang, Tiantian
论文数: 0引用数: 0
h-index: 0
机构:Xiamen Univ, Environm Sci Res Ctr, State Key Lab Marine Environm Sci, Xiamen 361005, Peoples R China
Tang, Tiantian
;
Cai, Wei-Jun
论文数: 0引用数: 0
h-index: 0
机构:Xiamen Univ, Environm Sci Res Ctr, State Key Lab Marine Environm Sci, Xiamen 361005, Peoples R China