Human health risk assessment for fluoride and nitrate contamination in the groundwater: a case study from the east coast of Tamil Nadu and Puducherry, India

Khan, A. Faizal; Srinivasamoorthy, K.; Prakash, R.; Gopinath, S.; Saravanan, K.; Vinnarasi, F.; Babu, C. Prakash; Rabina, C.

doi:10.1007/s12665-021-10001-4

Cited by 28 publications

(8 citation statements)

References 68 publications

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“…The nitrate content in groundwater increases rapidly due to the discharge of industrial wastewater and excessive fertilization. − To eliminate environmental pollution by nitrate and to avoid its adverse effect on human health, electrolysis with simultaneous NH 3 synthesis and nitrate elimination has been considered to be one of the most attractive solutions. ,, To this purpose, transition metals (such as Pt, Pd, Rh, Ru, Cu, Ni, Fe, Sn, and Co), binary alloys (such as CuPt, PdRh, RuPt, and NiFe), and transition-metal (or nonmetal) compounds (such as Co 3 O 4 , MoS 2 , VN, FeCo 2 O 4 , ZnCo 2 O 4 , NiCo 2 O 4 , and B 2.6 C) are examined as electrocatalysts for the conversion of nitrate as well as the related intermediate products like NO 2 – , NO, N 2 O, and NH 2 OH to NH 3 . ,− Among them, noble metal catalysts face two challenges. First, noble metal catalysts usually have good activity toward HER, which competes with the nitrate reduction, resulting in low Faradaic efficiency and yield of NH 3 , especially at the high overpotentials.…”

Section: Introductionmentioning

confidence: 99%

Roles of Copper in Nitrate Reduction at Copper-Modified Ru/C Catalysts

Chen

Zhou

et al. 2023

J. Phys. Chem. C

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Electrochemical reduction is a potential solution to eliminate nitrate in wastewater; however, the poor activity and product selectivity of traditional electrocatalysts impede its large-scale application. Herein, we report a new catalyst of Cu-modified Ru nanoparticles (Cu-modified Ru/C NPs) prepared by underpotential deposition (UPD) of Cu atoms onto Ru NPs, which shows good nitrate reduction kinetics and NH3 selectivity. To unravel the enhancing mechanism, the impact of Cu coverage on nitrate reduction and the formation of possible products/intermediates as well as the competition of side products H2 have been investigated systematically by tracking the reverse oxidation of such species using rotation ring disk electrode (RRDE) combined with cyclic voltammetry. Our results reveal that the Cu-modified Ru/C NPs perform NH3 yield of 23.7 μmol h–1 cm–2 and 95% Faradaic efficiency, which is better than Ru/C NPs (6.0 μmol h–1 cm–2 with Faradaic efficiency of 66%); This enhancement of modified Cu atoms toward nitrate reduction results from synergetic effects: (i) Cu blocks the hydrogen evolution reaction (HER) sites on Ru surface; (ii) Cu accelerates the rate of nitrate reduction to nitrite; (iii) the enhanced nitrite reduction activity of Cu sites on Ru substrate is probably a result of changes in electronic structure of Cu.

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Section: Introductionmentioning

confidence: 99%

Roles of Copper in Nitrate Reduction at Copper-Modified Ru/C Catalysts

Chen

Zhou

et al. 2023

J. Phys. Chem. C

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“…Nitrate (NO3 -) is a widespread groundwater pollutant, and its concentration has been observed to increase globally in various regions such as America (Burow et al, 2010), Canada (Capone＆Bautista, 1985, India (Adimalla et al, 2018), and others. The primary sources of NO3 -can be attributed to the agricultural use of nitrogen-rich fertilizers (Khan et al, 2021), untreated domestic sewage (Widory et al, 2004), industrial wastewater (Wakida ＆Lerner, 2005), discharge of livestock and poultry manure (Thorburn et al, 2003), as well as leaching from expanding landfill sites (Panneerselvam et al, 2023). Due to its association with anthropogenic groundwater contamination, nitrate has garnered considerable attention as a crucial indicator (El Mountassir et al, 2022).…”

Section: Human Activities Impactmentioning

confidence: 99%

Deciphering Hydrochemical Characteristics and Formation mechanism of Groundwater in the Pongo Iron Mine Area, Peru

Ge,

Wang,

Wan

et al. 2024

Preprint

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Understanding the hydrochemical characteristics and formation processes of groundwater in mining areas is crucial for protecting and utilizing underground water resources. This study analyzed 42 groundwater samples from the Pongo mining area in Peru to determine the spatial-temporal distribution patterns and formation processes of chemical components. Statistical analysis, Gibbs diagrams, ion ratios, and hydrogeochemical modeling techniques were used. The results show that the groundwater in the study area is weakly alkaline (pH = 7.72) and has a total dissolved solids (TDS) range of 253.19 to 17912.82 mg/L, with an average of 2788.31 mg/L. About 55% of the groundwater samples are classified as brackish or saline water. According to the Gibbs diagram, the chemical composition of groundwater is mainly controlled by evaporation and rock weathering. Furthermore, ion ratios indicate the contribution of human activities, oxidation of pyrite, and desulfurization reactions to ionic concentrations in this groundwater system. The dissolution of evaporite minerals such as halite and gypsum contributes to the presence of Na+, Cl−, and SO42−, while Ca2+ and Mg2+ mainly come from the dissolution of minerals like calcite, gypsum, dolomite, and silicate. It is worth noting that approximately 38% groundwater samples have recorded NO3− concentrations levels surpassing the standard limit of 10 mg/L for drinking purpose, which is mainly attributed to agricultural activities. Moreover, the hydrogeochemical modeling indicates a strong dissolution tendency for halite and propensity for dissolution for gypsum, calcite, and dolomite. Additionally, pyrite oxidation and cation exchange processes also occur.

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“…Nitrate (NO3 -) is a widespread groundwater pollutant, and its concentration has been observed to increase globally in various regions such as America (Burow et al 2010), Canada (Capone and Bautista 1985), India (Adimalla et al 2018), and others. The primary sources of NO3 -can be attributed to the agricultural use of nitrogen-rich fertilizers (Khan et al 2021), untreated domestic sewage (Widory et al 2004), industrial wastewater (Esmaeili et al 2014), discharge of livestock and poultry manure (Thorburn et al 2003), as well as leaching from expanding landfill sites (Panneerselvam et al 2023). Due to its association with anthropogenic groundwater contamination, nitrate has garnered considerable attention as a crucial indicator (El Mountassir et al 2022).…”

Section: Human Activities Impactmentioning

confidence: 99%

Deciphering Hydrochemical Characteristics and Formation mechanism of Groundwater in the Banggou Iron Mine Area, Peru

Ge,

Wang,

Wan

et al. 2023

Preprint

View full text Add to dashboard Cite

Understanding the hydrochemical characteristics and formation processes of groundwater in mining areas is crucial for protecting and utilizing underground water resources. This study analyzed 42 groundwater samples from the Banggou mining area in Peru to determine the spatial-temporal distribution patterns and formation processes of chemical components. Statistical analysis, Gibbs diagrams, ion ratios, and hydrogeochemical modeling techniques were used. The results show that the groundwater in the study area is weakly alkaline (pH = 7.72) and has a total dissolved solids (TDS) range of 253.19 to 17912.82 mg/L, with an average of 2788.31 mg/L. About 55% of the groundwater samples are classified as brackish or saline water. The chemical composition of groundwater is mainly controlled by evaporation, rock weathering, human activities, oxidation of pyrite, and desulfurization reactions. The dissolution of evaporite minerals such as halite and gypsum contributes to the presence of Na+, Cl−, and SO42−, while Ca2+ and Mg2+ mainly come from the dissolution of minerals like calcite, gypsum, dolomite, and silicate. The presence of NO3− is attributed to anthropogenic influences. The hydrogeochemical modeling indicates a strong dissolution tendency for halite and propensity for dissolution for gypsum, calcite, and dolomite. Additionally, pyrite oxidation and cation exchange processes occur from recharge to discharge zones.

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Human health risk assessment for fluoride and nitrate contamination in the groundwater: a case study from the east coast of Tamil Nadu and Puducherry, India

Cited by 28 publications

References 68 publications

Roles of Copper in Nitrate Reduction at Copper-Modified Ru/C Catalysts

Roles of Copper in Nitrate Reduction at Copper-Modified Ru/C Catalysts

Deciphering Hydrochemical Characteristics and Formation mechanism of Groundwater in the Pongo Iron Mine Area, Peru

Deciphering Hydrochemical Characteristics and Formation mechanism of Groundwater in the Banggou Iron Mine Area, Peru

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