Historical accumulation and environmental risk of nitrogen and phosphorus in sediments of Erhai Lake, Southwest China

Ni, Zhaokui; Wang, Shengrui

doi:10.1016/j.ecoleng.2015.03.005

Cited by 83 publications

(33 citation statements)

References 30 publications

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“…Denitrification transformed NO 3 -N into gaseous N 2 or N 2 O and was often regarded as the main TN reduction process. In general, NO 3 -N attenuation through denitrification could not function well once the anaerobic period was less than 7 days (Tang et al 2008;Ni and Wang, 2015), and therefore, denitrification in columns subjected to a 6-cm/day variation might not function well for short anaerobic periods of nearly 6 days and appeared to be more favorable for nitrogen release. The loss of TN from the water column through nitrification and denitrification, microbial assimilation, and sediment adsorption maybe strengthened (beyond background concentrations) by the WL regulation.…”

Section: Potential Effects Of Water Level Regulation On Nitrogen Dynamentioning

confidence: 93%

“…For aerobic conditions, a release of phosphorus from sediment was limited, though OM mineralization was higher under aerobic compared to anaerobic conditions (Jiang et al 2006;Wengrove et al 2015). On the contrary, anaerobic conditions promoted the release of phosphorus from sediment via organic phosphorus mineralization and liberation of iron oxide-combined phosphorus (Zhang and Huang 2007;Ni and Wang 2015). When compared to the present study, results indicate that a much slower alternation between aerobic and anaerobic conditions and a longer anoxic period (3 versus 6 cm/day WL variation) exhibited a much higher phosphorus release potential (Figs.…”

Section: Potential Effects Of Water Level Regulation On Phosphorus Dymentioning

confidence: 96%

“…Nitrogen is mainly released from (surface) sediment as NH 4 -N (Beutel 2006;Lu et al 2009;Ni and Wang 2015). Because of restrained microbial nitrification such as conversion of NH 4 -N to NO 3 -N via nitrification and limited physical and chemical transformation (e.g., ammonification; Jing et al 2013), higher water-based NH 4 -N concentrations were detected with high WL.…”

Section: Potential Effects Of Water Level Regulation On Nitrogen Dynamentioning

confidence: 96%

“…For shallow water bodies with a water depth of less than 3 m (e.g., Taihu Lake, China), wind can be regarded as a most important driving force for nutrient release (Pang et al 2008;Ni and Wang 2015). For reservoirs subjected to large WL amplitude fluctuations (more than 10 m), dropping WL may directly cause an increase of OM mineralization and nutrient release from the water-sediment interface (Sánchez-Carrillo et al 2007).…”

Section: Introductionmentioning

confidence: 98%

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Impact of Simulated Water Level Regulation on Sediment Nutrient Release

Tang¹,

Wu²,

Yang³

et al. 2015

Water Air Soil Pollut

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Representative sediment samples rich in nitrogen and phosphorus (both continuous and intermittently submerged) were used to conduct dynamic water level (WL) regulation experiments with various WL velocity modes (0, 3, and 6 cm/day). The experiments lasted three WL regulating cycles (6 months), and each single cycle included four WL dynamic phases: decline, stable, ascend, and re-stable. During the experiment, a greater nutrient stock caused higher nutrient release fluxes for continuously submerged sediments when compared to corresponding intermittently submerged sediments regardless of WL regulation. Moreover, continuous submerged sediment nutrient release showed a similar BUp attern to the intermittently submerged sediment, and nutrient concentrations within the water phase generally increased with rising WL and decreased with dropping WL. Rapid WL regulation such as 6 cm/day promoted nitrogen release, and slow WL regulation at 3 cm/day favored phosphorus leaching. When three WL regulation cycles were finished, WL regulation of 6 cm/day resulted in 18 and 25 % decline of sediment mean organic matter (OM) content for continuous and intermittently submerged sediment, respectively. However, increased WL regulation cycles impacted on sediment nitrogen and phosphorus stock in different manners. For example, a WL regulation of 6 cm/day led to a 582 mg/kg decline and 322 mg/kg increase for intermittently submerged sediment in terms of total nitrogen (TN) and total phosphorus (TP) content, respectively. Results indicated that direct WL regulation insignificantly affected sediment nutrient release, but changed the overlying water conditions such as pH and redox potential (redox), and then indirectly changed the nutrient release dynamics.

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Section: Potential Effects Of Water Level Regulation On Nitrogen Dynamentioning

confidence: 93%

Section: Potential Effects Of Water Level Regulation On Phosphorus Dymentioning

confidence: 96%

Section: Potential Effects Of Water Level Regulation On Nitrogen Dynamentioning

confidence: 96%

Section: Introductionmentioning

confidence: 98%

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Impact of Simulated Water Level Regulation on Sediment Nutrient Release

Tang¹,

Wu²,

Yang³

et al. 2015

Water Air Soil Pollut

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show abstract

“…Total nitrogen (TN) and phosphorus (TP) were 2354-6174 mg kg −1 and 418-1108 mg kg −1 , respectively, in the surface sediments (about 20 cm thick). Fe/Al-P was the main form of TP and inorganic-N was the main form of TN, consisting to 43% of TN (Zhao et al, 2013a(Zhao et al, , 2013bNi and Wang, 2015).…”

Section: Experimental Sitementioning

confidence: 99%

Improvement of water quality by sediment capping and re-vegetation with Vallisneria natans L.: A short-term investigation using an in situ enclosure experiment in Lake Erhai, China

Zhu

Cao

et al. 2016

Ecological Engineering

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Hydro‐Chemical Conditions of Shaping the Water Quality of Shallow Łęczna‐Włodawa Lakes (Eastern Poland)

Ferencz

Toporowska

Dawidek

et al. 2017

CLEAN Soil Air Water

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Although water quality has been the main concern of ecologists over the last decades, a deterioration of both the quality and quantity of water has been observed worldwide. Understanding the dominant processes shaping eutrophication processes is crucial to sustainable water management in lake catchments. The aim of the study was to determine the importance of elements of lake‐catchment system structures in the processes of shaping lake water quality. The values of loads delivered to the lake basins from their catchments as well as nutrient output were calculated on the basis of stream discharge and nutrient concentration. A range of hydro‐chemical influences of each stream was presented by means of a range of a radius. A model of nutrient transport (prepared in GIS software) was used in the catchment of a lake without tributaries. Additionally, phytoplankton abundance and water quality indices were calculated. The results showed a clear pattern for the following lakes, Syczyńskie > Pniówno > Chuteckie > Tarnowskie, in terms of nutrient load as well as water quality. The hydro‐chemical influence of lake tributaries was determined by runoff processes, which reflected catchment geology, relief, and flushing time. The Q index showed a good ecological status for lakes Chuteckie and Tarnowskie, moderate for Lake Pniówno, and poor for Lake Syczyńskie.

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Historical accumulation and environmental risk of nitrogen and phosphorus in sediments of Erhai Lake, Southwest China

Cited by 83 publications

References 30 publications

Impact of Simulated Water Level Regulation on Sediment Nutrient Release

Impact of Simulated Water Level Regulation on Sediment Nutrient Release

Improvement of water quality by sediment capping and re-vegetation with Vallisneria natans L.: A short-term investigation using an in situ enclosure experiment in Lake Erhai, China

Hydro‐Chemical Conditions of Shaping the Water Quality of Shallow Łęczna‐Włodawa Lakes (Eastern Poland)

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