Source and fate of nitrate in contaminated groundwater systems: Assessing spatial and temporal variations by hydrogeochemistry and multiple stable isotope tools

Biddau, Riccardo; Cidu, Rosa; Pelo, Stefania Da; Carletti, Alberto; Ghiglieri, Giorgio; Pittalis, Daniele

doi:10.1016/j.scitotenv.2018.08.007

Cited by 104 publications

(25 citation statements)

References 68 publications

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“…This difference was probably due to the difference in corn straw status in the soil. For the soil column collected after 230 days of straw return, the straw was decomposed partially under the conditions of the low temperature and soil moisture in early spring 3 . Non-decomposed straw also resulted in a lower soil bulk density, higher soil porosity, higher permeability and more nitrogen leaching out of the column compared with that of the soil column collected after 350 days of corn straw returning, in which the corn straw had experienced more complete decomposition during the wet and warm summer.…”

Section: Resultsmentioning

confidence: 99%

“…Considering labour costs and planting habits, the farmers in this area mostly adopt a fertilization method called "one-time fertilization" (in which all fertilizers required for the whole growth cycle of crops are applied to the soil at one time when sowing in spring) 2 . This fertilization method will result in a low fertilizer utilization rate (generally no more than 35%) and a large amount of chemical fertilizer leaching to the groundwater 3 .…”

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confidence: 99%

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Effects of different agronomic practices on the selective soil properties and nitrogen leaching of black soil in Northeast China

Wang

Gao

Xie

et al. 2020

Sci Rep

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Considering the large amount and high frequency application of concentrated fertilizer nitrogen in the Black Soil Region of Northeast China, the current laboratory/field simulation study aimed to explore the pollution risk of added nitrogen in black soil to groundwater and identify effective measures to prevent and control soil nitrogen leaching with an undisturbed soil column. The results showed that the saturated nitrogen adsorption capacities increased by 1.7%, 7.7% and 18.5% in ploughing, impervious agent (starch grafted polyacrylic acid) addition, and corn straw returning treatments, respectively, relative to the control (no-till). When the collection volume of the leaching solution reached the experimental maximum (4,000 mL), the total amount of nitrogen leaching from the control soil column (i.e., the no-tillage treatment) accounted for more than 50% of the added nitrogen, indicating a great risk of nitrogen pollution in groundwater. Compared with the no-tillage treatment, the amount of nitrogen leaching from the ploughing treatment increased insignificantly, and the amount of nitrogen leaching in the following spring in the corn straw returning treatment increased by 11.2%. The amount of nitrogen leaching decreased by 12.5% in the soil sampled in autumn of the second year. The total amount of nitrogen leaching in the soil with impervious agents decreased by 40.1%. Therefore, the permeability-reducing agent could significantly reduce underground water pollution risk posed by nitrogen leaching.

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Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

Effects of different agronomic practices on the selective soil properties and nitrogen leaching of black soil in Northeast China

Wang

Gao

Xie

et al. 2020

Sci Rep

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“…This study's results showed high nitrate concentrations (up to 162 mg/L) in groundwater samples monitored in this area for over 1 year. Present levels of nitrate accumulation in groundwater hosted in sand sediments were substantially higher than those found in groundwater associated with clay sediments (Biddau et al, 2019). The presence of higher nitrate concentration in groundwater reported from the coastal plain of the Campania region covering 13,500 km 2 in Southern Italy.…”

Section: Nitrogen Species In Groundwatermentioning

confidence: 97%

Groundwater pollution: Occurrence, detection, and remediation of organic and inorganic pollutants

Kurwadkar

Kanel

Nakarmi

2020

Water Environment Research

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Groundwater pollution is a result of natural and anthropogenic activities. While the elevated levels of various inorganic constituents could be attributed to natural processes, such as geological weathering and aquifer characteristics, many times, anthropogenic activities also substantially pollute the groundwater. On the contrary, the occurrence of organic pollutants is primarily due to various anthropogenic activities. Extensive groundwater mining, the hydraulic connection between groundwater and other surface water bodies, and leaking underground buried infrastructure also contribute to groundwater pollution. Water resources are scarce commodities, and preserving groundwater quality is of critical concern. This paper documents instances of groundwater quality impact during the year 2019 due to both natural and anthropogenic activities throughout the world.

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“…More recently, promising environmental stable isotope methods were applied to provide information about NO 3 − sources (e.g., animal waste vs. soil nitrogen) and transformations (e.g., nitrification and denitrification). The theoretical basis for isotopic method results from different NO 3 − sources having distinctive δ 15 N and δ 18 O isotopic signatures (Biddau et al, 2019). For example, the δ 15 N values from AD, SN, NF and M&S range from −13 to +13‰, 0 to +8‰, −6 to +6‰, and +4 to +25‰, respectively (Flipse and Bonner, 1985;Kendall and McDonnell, 1998;Xue et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Riverine nitrate source apportionment using dual stable isotopes in a drinking water source watershed of southeast China

Shang

Huang

Mei

et al. 2020

Science of The Total Environment

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Source and fate of nitrate in contaminated groundwater systems: Assessing spatial and temporal variations by hydrogeochemistry and multiple stable isotope tools

Cited by 104 publications

References 68 publications

Effects of different agronomic practices on the selective soil properties and nitrogen leaching of black soil in Northeast China

Effects of different agronomic practices on the selective soil properties and nitrogen leaching of black soil in Northeast China

Groundwater pollution: Occurrence, detection, and remediation of organic and inorganic pollutants

Riverine nitrate source apportionment using dual stable isotopes in a drinking water source watershed of southeast China

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