Identification and Quantification of Nitrogen in a Reservoir, Jiaodong Peninsula, China

Meng, Zheng; Sheng, Yanqing; Sun, Ruichuan; Tian, Chongguo; Zhang, Haibo; Ning, Jicai; Sun, Qiyao; Li, Zhaoran; Bottrell, Simon H.; Mortimer, Robert J.G.

doi:10.2175/106143017x14839994523226

Cited by 7 publications

(8 citation statements)

References 39 publications

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“…− -N in sediments from all sites, exhibiting 76.28% and 73.70% among inorganic N fractions in spring and summer, respectively (Figure 2a,b). Thereinto, NO 3 − -N was widely dispersed in Sites S5 and S6 in the flood seasons, which is in accordance with Zheng et al's [40] study. Notably, the highest level of NO 3…”

Section: Seasonal and Spatial Variations Of Different Inorganic Nitrosupporting

confidence: 90%

“…In rainy seasons, there were significantly positive correlations among TN, NO 3 − -N, TP, and NaOH-P ( Table 2), suggesting that they derived from homologous sources, such as agricultural and domestic sewage from upstream urbanization [54]. TN was highly positively correlated with NO 3 − -N (r = 0.802) indicating an oxidizing environment in the sediments [40]. Notably, NO 2 − -N was only significantly positively correlated to OP (r = 0.729, p < 0.01).…”

Section: Identification Of Pollution Sources Based On Statistical Anamentioning

confidence: 99%

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Seasonal and Spatial Distribution and Pollution Assessment of Nitrogen and Phosphorus in Sediments from One of the World’s Largest Tidal Reservoirs

Shen

Peng

Yuan

et al. 2021

Water

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Endogenous nutrients released from sediments are a potential hazardous source in aquatic ecosystems, especially reservoirs. Here, we investigated seasonal and spatial variations of different species of nitrogen and phosphorus and evaluated the pollution levels of nutrients in sediments from one of the world’s largest tidal reservoirs. The results indicate that most of the total nitrogen and phosphorus were accumulated in sediments from the reservoir downstream, which were enhanced by runoff and precipitation during seasonal alteration. Total nitrogen was increased to 2471.17 mg/kg during the saltwater intrusion period. Nitrate and ammonium were the major nitrogen fractions in flood and dry seasons, respectively, while the highest level of phosphorus, especially inorganic phosphorus, was found in summer. The sediment was slightly to moderately contaminated by nitrogen but not phosphorus, especially downstream in winter, according to the applied indices. Multivariate statistical analyses reveal that nutrient input in flood seasons was more complex than that in dry seasons, which possibly originated from upstream agricultural and domestic sewage.

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Section: Seasonal and Spatial Variations Of Different Inorganic Nitrosupporting

confidence: 90%

Section: Identification Of Pollution Sources Based On Statistical Anamentioning

confidence: 99%

Seasonal and Spatial Distribution and Pollution Assessment of Nitrogen and Phosphorus in Sediments from One of the World’s Largest Tidal Reservoirs

Shen

Peng

Yuan

et al. 2021

Water

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“…Therefore, nitrogen as well as phosphorus is considered a chemical marker of pollution (Liu et al, 2018). Excessive nitrogen discharge induces severe environmental problems, such as eutrophication and anoxia, also affecting human health (Zheng et al, 2017). High nitrogen, nitrites, and/or nitrates concentration in drinking water are related with the manifestation of cancer, diabetes, methemoglobinemia, thyroid disorders, and spontaneous abortions (Gao et al, 2012;Zheng et al, 2017).…”

Section: Discussionmentioning

confidence: 99%

“…Excessive nitrogen discharge induces severe environmental problems, such as eutrophication and anoxia, also affecting human health (Zheng et al, 2017). High nitrogen, nitrites, and/or nitrates concentration in drinking water are related with the manifestation of cancer, diabetes, methemoglobinemia, thyroid disorders, and spontaneous abortions (Gao et al, 2012;Zheng et al, 2017). Thus, the uptake of nitrogen by zebrafish gills following exposure to polluted BO water may contribute to the brain and behavioral impairments found in zebrafish in (Leme et al, 2018) experiments.…”

Section: Discussionmentioning

confidence: 99%

Billings Reservoir (Brazil): Chemical Studies on Water and Chemical and Morphological Studies on Zebrafish Gills

et al. 2021

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Previous study of this research group revealed that water from the Billings reservoir (Brazil) intended for human use (water supply and seafood) has microbiological contamination and causes lethality and brain and behavioral impairments in zebrafish. The objective of this study was to understand what have induced these impairments in the animal model. Chemical analyses on water samples from Rio Pequeno (RP), Rio Grande (RG), and Bororé (BO) rivers, as well as chemical and morphological analyses on zebrafish gills exposed to those waters were performed. Waters samples from RP, RG, and BO presented high levels of phosphorus. BO water and fish gills exposed to this water presented high levels of nitrogen. RG water caused potassium contamination in gills. Phosphorus, nitrogen, and potassium are indicators of anthropogenic pollution. RG water and fish gills exposed to this water presented low levels of calcium, which might be an indication of chemical imbalance that could lead to health problems in aquatic animals. RG and BO waters resulted in zirconium contamination in gills. BO water induced respiratory lamellae thickening in the gills, which may be the underlying mechanism for the observed hypoxia. In conclusion, behavioral, brain, and respiratory defects observed previously were induced by chemical and morphologicalb disturbances due to anthropogenic pollution in the Billings reservoir.

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“…Based on the water quality that is characteristic of local polluted rivers, reservoirs and groundwater [16], synthetic wastewater for this work was prepared with a low C/N ratio. The composition of synthetic wastewater for the SND experiments comprised glucose (0.6 g L…”

Section: Synthetic Influent and Sludgementioning

confidence: 99%

Simultaneous nitrification and denitrification using a novel up-flow bio-electrochemical reactor

Tang¹,

Meng²,

Sheng³

et al. 2019

Desalination and Water Treatment

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Nitrogen removal is a problem in the field of water treatment, especially in the presence of sulfate. Conventional nitrification and denitrification are usually carried out in two separate reactors. In addition, the effect of sulfate on hydrogenotrophic denitrification is not clear. In this study, simultaneous nitrification and denitrification (SND) for nitrogen removal from water was conducted using a single novel up-flow bio-electrochemical reactor (UBER). The influence of dissolved oxygen (DO) on nitrogen removal was investigated. When influent DO was 7.0-8.0 mg L-1 , a heterotrophic nitrification zone (with DO 3.2-5.5 mg L-1) and a hydrogenotrophic denitrification zone (with DO 1.6-4.2 mg L-1) were obtained within the reactor, and the removal rates of NH 4 +-N and TN reached more than 90%. The distribution of DO inside developing biofilms was measured using microelectrodes. When DO in the hydrogenotrophic denitrification zone was 2.9 mg L-1 , DO inside the biofilm was just 0.5 mg L-1. The effect of sulfate on hydrogenotrophic denitrification was studied by regulating the S/N ratio of influent water. Simultaneous removal of nitrate and sulfate can be achieved at low S/N, and the removal rates of nitrate and sulfate were ~80%. With increasing S/N ratio, sulfide produced by sulfate reduction inhibited both denitrification and further sulfate reduction.

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Identification and Quantification of Nitrogen in a Reservoir, Jiaodong Peninsula, China

Cited by 7 publications

References 39 publications

Seasonal and Spatial Distribution and Pollution Assessment of Nitrogen and Phosphorus in Sediments from One of the World’s Largest Tidal Reservoirs

Seasonal and Spatial Distribution and Pollution Assessment of Nitrogen and Phosphorus in Sediments from One of the World’s Largest Tidal Reservoirs

Billings Reservoir (Brazil): Chemical Studies on Water and Chemical and Morphological Studies on Zebrafish Gills

Simultaneous nitrification and denitrification using a novel up-flow bio-electrochemical reactor

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