Nitrogen biogeochemical reactions during bank filtration constrained by hydrogeochemical and isotopic evidence: A case study in a riverbank filtration site along the Second Songhua River, NE China

Chen, Yaoxuan; Su, Xiaosi; Wan, Yong; Lyu, Hang; Dong, Weihong; Shi, Yawei; Zhang, Yiwu

doi:10.1016/j.apgeochem.2022.105272

Cited by 15 publications

(12 citation statements)

References 61 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Ammonium production via DNRA is regulated by the balance of electron acceptors (nitrate‐N) and donors (organic C, reduced Fe, and sulfide; Burgin & Hamilton, 2007; Pandey et al., 2020; Rutting et al., 2011). High concentrations of nitrate‐N vis‐à‐vis organic C favor denitrification, while high ratios of soil C:N (>12 Wei et al., 2022; S. Yin et al., 1998) and DOC:nitrate‐N (>10–15, Chen et al., 2022) and Fe (or sulfide):nitrate‐N favor DNRA (Chen et al., 2022; Robertson & Thamdrup, 2017). Under a high C to nitrate‐N ratio, DNRA has an advantage over denitrification since more electrons (eight vs. five) can be transferred per mole of nitrate‐N and the potential free energy per mole nitrate‐N is higher for DNRA than denitrification (Tiedje, 1982).…”

Section: Discussionmentioning

confidence: 99%

“…Stagnant and/or poorly mixed hydrologic conditions or flow paths with long residence time coupled with very low redox potentials and higher concentrations of electron donors such as organic carbon, dissolved iron (Fe), and sulfide have especially been shown to favor DNRA over denitrification (Burgin & Hamilton, 2007; Covatti & Grischek, 2021; Jantti et al., 2021; Reverey et al., 2018; Robertson & Thamdrup, 2017; Rutting et al., 2011; Sgourdis et al., 2011; Wang et al., 2020; G. Yin et al., 2017). Denitrification typically occurs for low organic C to nitrate‐N ratios (OC limiting) while DNRA has been reported for high organic C to nitrate‐N ratios (nitrate‐N limiting; >10–15; Chen et al., 2022; Pandey et al., 2020; Wei et al., 2022; S. Yin et al., 1998). How this balance between N removal via denitrification versus accumulation through ammonification and/or DNRA occurs in reducing riparian sediments upstream of milldams is a key knowledge gap that needs to be addressed.…”

Section: Introductionmentioning

confidence: 99%

“…Yin et al, 2017). Denitrification typically occurs for low organic C to nitrate-N ratios (OC limiting) while DNRA has been reported for high organic C to nitrate-N ratios (nitrate-N limiting; >10-15; Chen et al, 2022;Pandey et al, 2020;Wei et al, 2022;S. Yin et al, 1998).…”

mentioning

confidence: 99%

“…However, persistent hypoxic or anoxic (hypoxic <2 mg L −1 , anoxic ∼0 mg/L; Diaz & Rosenberg, 2008) and reducing soil conditions can increase N concentrations in riparian and wetland soils through accumulation of ammonium-N (Duval & Hill, 2007;Jantti et al, 2021;Liang et al, 2020;Reverey et al, 2018;Wang et al, 2020). Early studies attributed this ammonium-N accumulation to ammonification and suppression of nitrification (e.g., Doussan et al, 1998;Duval & Hill, 2007), whereas more recent studies increasingly attribute it to dissimilatory nitrate reduction to ammonium (DNRA; Chen et al, 2022;Covatti & Grischek, 2021;Liang et al, 2020;Murphy et al, 2020;Pandey et al, 2020;Su et al, 2022;Wang et al, 2020;G. Yin et al, 2017;Zhao et al, 2021).…”

mentioning

confidence: 99%

See 3 more Smart Citations

Saturated, Suffocated, and Salty: Human Legacies Produce Hot Spots of Nitrogen in Riparian Zones

et al. 2022

View full text Add to dashboard Cite

The compounding effects of anthropogenic legacies for environmental pollution are significant, but not well understood. Here, we show that centennial‐scale legacies of milldams and decadal‐scale legacies of road salt salinization interact in unexpected ways to produce hot spots of nitrogen (N) in riparian zones. Riparian groundwater and stream water concentrations upstream of two mid‐Atlantic (Pennsylvania and Delaware) milldams, 2.4 and 4 m tall, were sampled over a 2 year period. Clay and silt‐rich legacy sediments with low hydraulic conductivity, stagnant and poorly mixed hydrologic conditions, and persistent hypoxia in riparian sediments upstream of milldams produced a unique biogeochemical gradient with nitrate removal via denitrification at the upland riparian edge and ammonium‐N accumulation in near‐stream sediments and groundwaters. Riparian groundwater ammonium‐N concentrations upstream of the milldams ranged from 0.006 to 30.6 mgN L−1 while soil‐bound values were 0.11–456 mg kg−1. We attribute the elevated ammonium concentrations to ammonification with suppression of nitrification and/or dissimilatory nitrate reduction to ammonium (DNRA). Sodium inputs to riparian groundwater (25–1,504 mg L−1) from road salts may further enhance DNRA and ammonium production and displace sorbed soil ammonium‐N into groundwaters. This study suggests that legacies of milldams and road salts may undercut the N buffering capacity of riparian zones and need to be considered in riparian buffer assessments, watershed management plans, and dam removal decisions. Given the widespread existence of dams and other barriers and the ubiquitous use of road salt, the potential for this synergistic N pollution is significant.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

Saturated, Suffocated, and Salty: Human Legacies Produce Hot Spots of Nitrogen in Riparian Zones

et al. 2022

View full text Add to dashboard Cite

show abstract

“…Combined with the hydrogeological settings in the center of the basin, it is speculated that the large‐scale exploitation of confined water in the center of the basin drives the vertical infiltration recharge of phreatic water to the confined aquifer. In this long‐term migration and transformation process, the nitrate in water and the microbial environment of aquifers have denitrification, resulting in a decrease in the recharge ratio calculated by N‐O isotope method (Chen et al, 2022; Kendall et al, 2007). In general, the above multi‐isotope linkage analysis results show that the calculation results are accurate.…”

Section: Discussionmentioning

confidence: 99%

Source identification and apportionment of the nitrogen in groundwater based on isotope methods in the Beilin region of Suihua basin, northeastern China

Meng

Zhang

Liu

2022

Water Environment Research

View full text Add to dashboard Cite

Multi‐isotope method was used to analyze the migration and transformation characteristics of nitrogen in groundwater in the center of a typical confined water basin, and a simplified isotope mixing model was established to quantify the contribution of potential nitrate sources in the center of the basin. Based on the water quality monitoring results, the contour map of nitrate concentration in groundwater in the center of the basin was drawn. The results showed that the nitrate concentration in groundwater in the center of the basin increased gradually from upstream to downstream. The high value area of nitrate concentration in phreatic water is mainly affected by agricultural activities and infiltration of sewage discharge from upstream urban areas. The high value area of nitrate concentration in confined water is mainly due to the water level depression funnel caused by large exploitation of confined water. The quantitative results of N‐O isotope mixing model for potential nitrate sources show that the main recharge sources of groundwater in the center of the basin are atmospheric precipitation, agricultural irrigation water, and the lateral inflow of upstream groundwater. Agricultural irrigation water has the highest contribution rate of 67.01%. The main recharge sources of confined aquifer in the center of the basin are phreatic water leakage and lateral inflow of upstream confined water. The contribution rate of upstream confined water is between 45.55% and 56.35%, which is basically maintained at about 50%. Compared with the calculation results of D‐O isotope mixing model, the accuracy of the established N‐O isotope mixing model meets the basic requirements. The results of this study can provide technical reference and theoretical support for the identification and quantitative research of potential nitrate sources in groundwater under the same type of hydrogeological conditions. Practitioner points Multiple isotope fingerprint comparison to identify nitrate source contribution ratio. Migration and transformation of nitrogen in the center of a typical confined water basin Simplified the traditional isotope mixing model to quickly quantify the source of contamination.

show abstract

The Impact of Aquifer Recharge on Groundwater Quality

Ahmed,

El-Rawy

2024

Earth and Environmental Sciences Library

View full text Add to dashboard Cite

Nitrogen biogeochemical reactions during bank filtration constrained by hydrogeochemical and isotopic evidence: A case study in a riverbank filtration site along the Second Songhua River, NE China

Cited by 15 publications

References 61 publications

Saturated, Suffocated, and Salty: Human Legacies Produce Hot Spots of Nitrogen in Riparian Zones

Saturated, Suffocated, and Salty: Human Legacies Produce Hot Spots of Nitrogen in Riparian Zones

Source identification and apportionment of the nitrogen in groundwater based on isotope methods in the Beilin region of Suihua basin, northeastern China

The Impact of Aquifer Recharge on Groundwater Quality

Contact Info

Product

Resources

About