Effect of hydrogeological conditions and surface loads on shallow groundwater nitrate pollution in the Shaying River Basin: Based on least squares surface fitting model

He, Bin; He, Jiangtao; Wang, Lei; Zhang, Xiaowen; Bi, Erping

doi:10.1016/j.watres.2019.114880

Cited by 62 publications

(14 citation statements)

References 38 publications

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“…The unusual increment in Cl − concentration is probably linked to the joint effect of both halite dissolution and anthropogenic pollution. Nitrate contamination in phreatic water has been a growing concern to hydrogeologists and practitioners over the world [22,23]. In the study area, a large quantity of chemical fertilizers were used by farmers to ensure better crop yields because agricultural cultivation is usually the principal economic source for local residents.…”

Section: Irrigation Water Quality Evaluationmentioning

confidence: 99%

Phreatic Water Quality Assessment and Associated Hydrogeochemical Processes in an Irrigated Region Along the Upper Yellow River, Northwestern China

Liu

Zhao

Yang

et al. 2020

Water

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Groundwater resources are playing an increasingly vital role in water supply for domestic and irrigation purposes in the Yinchuan Plain, along with the reduction in water transfer from the Yellow River. This study aimed to identify the current status of phreatic water quality and associated hydrogeochemical processes in an irrigated region along the upper Yellow River. A total of 78 water samples were collected in September 2018 for chemical analysis. Results showed that the phreatic water was excellent or good in most areas west of the Yellow River, while it was poor or very poor quality in some places east of the Yellow River. The nitrate contamination is particularly severe in the pluvial-alluvial plain, relating to the localized fine-grained zone with low permeability. Most samples had no sodium hazard but had magnesium hazard. Additionally, the overall evolutionary trend of the phreatic water showed the transformation of Ca-Mg-HCO 3 into Na-Cl-SO 4 type. Rock weathering and evaporation jointly predominate the evolution of phreatic water chemistry. The main geochemical processes involve the dissolution/precipitation of gypsum, halite, dolomite. and calcite, along with the cation exchange. Insights from this work have important implications for groundwater sustainable management in such irrigated regions along the upper Yellow River.

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Section: Irrigation Water Quality Evaluationmentioning

confidence: 99%

Phreatic Water Quality Assessment and Associated Hydrogeochemical Processes in an Irrigated Region Along the Upper Yellow River, Northwestern China

Liu

Zhao

Yang

et al. 2020

Water

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“…The main culprits of NO 3 pollution include agricultural runoff, fertilizer abuse, septic systems, industrial plants, and irrigation systems [4]. Currently, NO 3 contamination has been a serious environmental concern as it can affect the quality of groundwater and surface water, causing health problems to humans [5,6]. In an oxygen-deficient environment, such as in the digestive tract, NO 3 can be reduced to more toxic nitrite [7,8].…”

Section: Introductionmentioning

confidence: 99%

A Green Synthesis of Ru Modified g-C ₃ N ₄ Nanosheets for Enhanced Photocatalytic Ammonia Synthesis

et al. 2021

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Nitrate is a crucial environmental pollutant, and its risk on ecosystem keeps increasing. Photocatalytic conversion of nitrate to ammonia can simultaneously achieve the commercialization of environmental hazards and recovery of valuable ammonia, which is green and sustainable for the planet. However, due to the thermodynamic and kinetic energy barriers, photocatalytic nitrate reduction usually involves a higher selectivity of the formation of nitrogen that largely limits the ammonia synthesis activity. In this work, we reported a green and facile synthesis of novel metallic ruthenium particle modified graphitic carbon nitride photocatalysts. Compare with bulk graphitic carbon nitride, the optimal sample had 2.93-fold photocatalytic nitrate reduction to ammonia activity (2.627 mg/h/gcat), and the NH3 selectivity increased from 50.77% to 77.9%. According to the experimental and calculated results, the enhanced photocatalytic performance is attributed to the stronger light absorption, nitrate adsorption, and lower energy barrier for the generation of ammonia. This work may provide a facile way to prepare metal modified photocatalysts to achieve highly efficient nitrate reduction to ammonia.

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“…Recently, the content of inorganic nitrogen in soil, groundwater and estuarine areas has been increased due to the discharge of domestic sewage and the excessive use of agricultural nitrogen, which led to serious pollution [4] . Among them, the accumulation of nitrate nitrogen is the largest and exists in the form of non-adsorbable solute.…”

Section: Introductionmentioning

confidence: 99%

Effects of influent concentration and different valence cations on solute preferential transport in inter-tidal zone of Yellow River Estuary

Guo

Wang

2021

E3S Web Conf.

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The migration of land-based pollutants in tidal flat sediments has an important impact on the marine ecological environment. The effects of three influent concentrations and two cation valence states on the preferential transport of NO3-N in the sediments of the Yellow River Estuary were studied by soil column experiments. Results showed that the preferential flow and solute transport were more obvious with the increase of influent concentration; The solute potential was increased in the process of solute transport, which led to the rapid flow, shortened the total time, and facilitated the solute transport speed in the soil; The cation in the sediment of the Yellow River Estuary has little effect on the transport of nitrate nitrogen, and the initial penetration time of the penetration curve using Ca (NO3)2 as tracer was a little later than that using KNO3 as tracer, but it is not obvious.

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Effect of hydrogeological conditions and surface loads on shallow groundwater nitrate pollution in the Shaying River Basin: Based on least squares surface fitting model

Cited by 62 publications

References 38 publications

Phreatic Water Quality Assessment and Associated Hydrogeochemical Processes in an Irrigated Region Along the Upper Yellow River, Northwestern China

Phreatic Water Quality Assessment and Associated Hydrogeochemical Processes in an Irrigated Region Along the Upper Yellow River, Northwestern China

A Green Synthesis of Ru Modified g-C ₃ N ₄ Nanosheets for Enhanced Photocatalytic Ammonia Synthesis

Effects of influent concentration and different valence cations on solute preferential transport in inter-tidal zone of Yellow River Estuary

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Effect of hydrogeological conditions and surface loads on shallow groundwater nitrate pollution in the Shaying River Basin: Based on least squares surface fitting model

Cited by 62 publications

References 38 publications

Phreatic Water Quality Assessment and Associated Hydrogeochemical Processes in an Irrigated Region Along the Upper Yellow River, Northwestern China

Phreatic Water Quality Assessment and Associated Hydrogeochemical Processes in an Irrigated Region Along the Upper Yellow River, Northwestern China

A Green Synthesis of Ru Modified g-C 3 N 4 Nanosheets for Enhanced Photocatalytic Ammonia Synthesis

Effects of influent concentration and different valence cations on solute preferential transport in inter-tidal zone of Yellow River Estuary

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A Green Synthesis of Ru Modified g-C ₃ N ₄ Nanosheets for Enhanced Photocatalytic Ammonia Synthesis