capability of estuarine sediments to remove nitrogen: implications for drinking water resource in Yangtze Estuary

Water in the Yangtze Estuary is fresh most of the year because of the large discharge of Yangtze River. The Qingcaosha Reservoir built on the Changxing Island in the Yangtze Estuary is an estuarine reservoir for drinking water. Denitrification rate in the top 10 cm sediment of the intertidal marshes...

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Veröffentlicht in:Environmental science and pollution research international 2014-09, Vol.21 (18), p.10890-10899
Hauptverfasser: Liu, Lin, Wang, Dongqi, Deng, Huanguang, Li, Yangjie, Chang, Siqi, Wu, Zhanlei, Yu, Lin, Hu, Yujie, Yu, Zhongjie, Chen, Zhenlou
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container_issue 18
container_start_page 10890
container_title Environmental science and pollution research international
container_volume 21
creator Liu, Lin
Wang, Dongqi
Deng, Huanguang
Li, Yangjie
Chang, Siqi
Wu, Zhanlei
Yu, Lin
Hu, Yujie
Yu, Zhongjie
Chen, Zhenlou
description Water in the Yangtze Estuary is fresh most of the year because of the large discharge of Yangtze River. The Qingcaosha Reservoir built on the Changxing Island in the Yangtze Estuary is an estuarine reservoir for drinking water. Denitrification rate in the top 10 cm sediment of the intertidal marshes and bare mudflat of Yangtze Estuarine islands was measured by the acetylene inhibition method. Annual denitrification rate in the top 10 cm of sediment was 23.1 μmol m⁻² h⁻¹ in marshes (ranged from 7.5 to 42.1 μmol m⁻² h⁻¹) and 15.1 μmol m⁻² h⁻¹ at the mudflat (ranged from 6.6 to 26.5 μmol m⁻² h⁻¹). Annual average denitrification rate is higher at mashes than at mudflat, but without a significant difference (p = 0.084, paired t test.). Taking into account the vegetation and water area of the reservoir, a total 1.42 × 10⁸ g N could be converted into nitrogen gas (N₂) annually by the sediment, which is 97.7 % of the dissolved inorganic nitrogen input through precipitation. Denitrification in reservoir sediment can control the bioavailable nitrogen level of the water body. At the Yangtze estuary, denitrification primarily took place in the top 4 cm of sediment, and there was no significant spatial or temporal variation of denitrification during the year at the marshes and mudflat, which led to no single factor determining the denitrification process but the combined effects of the environmental factors, hydrologic condition, and wetland vegetation.
doi_str_mv 10.1007/s11356-014-2914-8
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The Qingcaosha Reservoir built on the Changxing Island in the Yangtze Estuary is an estuarine reservoir for drinking water. Denitrification rate in the top 10 cm sediment of the intertidal marshes and bare mudflat of Yangtze Estuarine islands was measured by the acetylene inhibition method. Annual denitrification rate in the top 10 cm of sediment was 23.1 μmol m⁻² h⁻¹ in marshes (ranged from 7.5 to 42.1 μmol m⁻² h⁻¹) and 15.1 μmol m⁻² h⁻¹ at the mudflat (ranged from 6.6 to 26.5 μmol m⁻² h⁻¹). Annual average denitrification rate is higher at mashes than at mudflat, but without a significant difference (p = 0.084, paired t test.). Taking into account the vegetation and water area of the reservoir, a total 1.42 × 10⁸ g N could be converted into nitrogen gas (N₂) annually by the sediment, which is 97.7 % of the dissolved inorganic nitrogen input through precipitation. Denitrification in reservoir sediment can control the bioavailable nitrogen level of the water body. 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The Qingcaosha Reservoir built on the Changxing Island in the Yangtze Estuary is an estuarine reservoir for drinking water. Denitrification rate in the top 10 cm sediment of the intertidal marshes and bare mudflat of Yangtze Estuarine islands was measured by the acetylene inhibition method. Annual denitrification rate in the top 10 cm of sediment was 23.1 μmol m⁻² h⁻¹ in marshes (ranged from 7.5 to 42.1 μmol m⁻² h⁻¹) and 15.1 μmol m⁻² h⁻¹ at the mudflat (ranged from 6.6 to 26.5 μmol m⁻² h⁻¹). Annual average denitrification rate is higher at mashes than at mudflat, but without a significant difference (p = 0.084, paired t test.). Taking into account the vegetation and water area of the reservoir, a total 1.42 × 10⁸ g N could be converted into nitrogen gas (N₂) annually by the sediment, which is 97.7 % of the dissolved inorganic nitrogen input through precipitation. Denitrification in reservoir sediment can control the bioavailable nitrogen level of the water body. 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Wang, Dongqi ; Deng, Huanguang ; Li, Yangjie ; Chang, Siqi ; Wu, Zhanlei ; Yu, Lin ; Hu, Yujie ; Yu, Zhongjie ; Chen, Zhenlou</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c569t-2cd810d8050e6cfc885bd41a6df1b33ca4124f43da0819123fa7c6823153c62d3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2014</creationdate><topic>Acetylene</topic><topic>Algae</topic><topic>Aquatic ecosystems</topic><topic>Aquatic Pollution</topic><topic>Atmospheric Protection/Air Quality Control/Air Pollution</topic><topic>Bioavailability</topic><topic>China</topic><topic>Denitrification</topic><topic>dissolved inorganic nitrogen</topic><topic>Drinking behavior</topic><topic>Drinking Water</topic><topic>Earth and Environmental Science</topic><topic>Ecotoxicology</topic><topic>Environment</topic><topic>Environmental Chemistry</topic><topic>Environmental effects</topic><topic>Environmental factors</topic><topic>Environmental Health</topic><topic>Environmental Monitoring - methods</topic><topic>Estuaries</topic><topic>Estuarine environments</topic><topic>estuarine sediments</topic><topic>Eutrophication</topic><topic>Geologic Sediments - chemistry</topic><topic>hydrology</topic><topic>Islands</topic><topic>Marshes</topic><topic>mash</topic><topic>Moisture content</topic><topic>Mud flats</topic><topic>Mudflats</topic><topic>Nitrates</topic><topic>Nitrogen</topic><topic>Nitrogen Compounds - isolation &amp; 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The Qingcaosha Reservoir built on the Changxing Island in the Yangtze Estuary is an estuarine reservoir for drinking water. Denitrification rate in the top 10 cm sediment of the intertidal marshes and bare mudflat of Yangtze Estuarine islands was measured by the acetylene inhibition method. Annual denitrification rate in the top 10 cm of sediment was 23.1 μmol m⁻² h⁻¹ in marshes (ranged from 7.5 to 42.1 μmol m⁻² h⁻¹) and 15.1 μmol m⁻² h⁻¹ at the mudflat (ranged from 6.6 to 26.5 μmol m⁻² h⁻¹). Annual average denitrification rate is higher at mashes than at mudflat, but without a significant difference (p = 0.084, paired t test.). Taking into account the vegetation and water area of the reservoir, a total 1.42 × 10⁸ g N could be converted into nitrogen gas (N₂) annually by the sediment, which is 97.7 % of the dissolved inorganic nitrogen input through precipitation. Denitrification in reservoir sediment can control the bioavailable nitrogen level of the water body. At the Yangtze estuary, denitrification primarily took place in the top 4 cm of sediment, and there was no significant spatial or temporal variation of denitrification during the year at the marshes and mudflat, which led to no single factor determining the denitrification process but the combined effects of the environmental factors, hydrologic condition, and wetland vegetation.</abstract><cop>Berlin/Heidelberg</cop><pub>Springer-Verlag</pub><pmid>24770927</pmid><doi>10.1007/s11356-014-2914-8</doi><tpages>10</tpages></addata></record>
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source MEDLINE; SpringerLink Journals - AutoHoldings
subjects Acetylene
Algae
Aquatic ecosystems
Aquatic Pollution
Atmospheric Protection/Air Quality Control/Air Pollution
Bioavailability
China
Denitrification
dissolved inorganic nitrogen
Drinking behavior
Drinking Water
Earth and Environmental Science
Ecotoxicology
Environment
Environmental Chemistry
Environmental effects
Environmental factors
Environmental Health
Environmental Monitoring - methods
Estuaries
Estuarine environments
estuarine sediments
Eutrophication
Geologic Sediments - chemistry
hydrology
Islands
Marshes
mash
Moisture content
Mud flats
Mudflats
Nitrates
Nitrogen
Nitrogen Compounds - isolation & purification
Precipitation
Research Article
Reservoirs
Rivers
Salinity
Sediments
Soil erosion
t-test
temporal variation
Temporal variations
Vegetation
Waste Water Technology
Water bodies
Water Management
Water Pollutants, Chemical - isolation & purification
Water Pollution Control
Water Purification - methods
Water quality
Water resources
Water Supply
Wetlands
title capability of estuarine sediments to remove nitrogen: implications for drinking water resource in Yangtze Estuary
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