Aqueous geochemistry and non-carcinogenic health risk through chloride and nitrate enriched groundwater of cosmopolitan Bangalore city, India

Ratnalu, Gunnam Venkata; Dhakate, Ratnakar; More, Shekhar

doi:10.1080/03067319.2023.2173007

Cited by 2 publications

(1 citation statement)

References 27 publications

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“…NO3contamination has also become an emerging contamination in India and worldwide due to the excessive use of fertilizers in agricultural practices for productive growth and discharge of sewage municipal wastewater disposal practices in urban and rural areas. Several studies were carried out for NO3contamination relating to agricultural practices and waste disposal practices (Ratnalu et al 2023;Zhang et al 2020;Kumar et al 2019;Adimalla 2020).…”

Section: Introductionmentioning

confidence: 99%

Appraisal of hydrochemistry and non-carcinogenic risk assessment for the distribution of Fluoride and Nitrate in a semi-arid region

Ullengula,

Dhakate,

Gunnam

et al. 2024

Preprint

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Assessment of hydrochemistry, and its impact on human health via ingestion and dermal contact of Fluoride (F−), and Nitrite (NO3−) concentrated groundwater was assessed via ingestion and dermal contact pathways. Sixty-one groundwater samples from a Dilwarpur Mandal, Nirmal district, Telangana State, India were collected and analyzed major ion chemistry for pre and post-rainy seasons from the semi-arid region. The concentration of F− ranged from 0.24–3.28, and 0.08–1.52 mg/l with mean of 1.01, and 0.65 mg/l, around 48%, and 26% of samples exceeded the permissible limits (> 1 mg/l), and NO3− concentration ranges from 3–136, and 6 -132 mg/l with mean of 36 mg/l, and around 34% and 45% of samples exceeded the permissible limits (> 45 mg/l) for both the seasons. Elevated F−, and NO3− concentration due to the dissolution of fluoride-bearing minerals, and excessive use of nitrate fertilizers. Water Quality Index (WQI) ranges from 28–133, and 29–88 for both seasons. Piper plot suggests that CaHCO3 type water with 56% and 51%; Mixed CaMgCl type water with 41% and 49% and Mixed CaNaHCO3 type water with 3% each for both seasons. Gibbs plot suggests that most of the samples are rock dominant type and suggests that the water-rock interaction during the process of percolation water with high evaporation conditions. Principal component Analyses (PCA) suggest that the same factors contribute to an increase in F− and NO3− concentrations in groundwater. Hazard quotient (HQ) via ingestion (HQING) and dermal contact (HQDER) of F− and NO3− experiences higher values than the threshold limit of 1.0 for various age groups, affecting human health due to non-carcinogenic effect, and immediately requires a suitable effective measure should be implemented in the area to avoid further health hazard impact on the existing society and for an upcoming generation.

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Section: Introductionmentioning

confidence: 99%

Appraisal of hydrochemistry and non-carcinogenic risk assessment for the distribution of Fluoride and Nitrate in a semi-arid region

Ullengula,

Dhakate,

Gunnam

et al. 2024

Preprint

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Long-term spatiotemporal changes in nitrate contamination of municipal groundwater resources after sewerage network construction in the Hungarian Great Plain

Mester,

Szabó,

Kiss

et al. 2024

Environ Sci Pollut Res

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Over the last decades, as a consequence of wastewater discharges and other anthropogenic sources, severe nitrate (NO3−) pollution has developed in municipal environment causing global concern. Thus, eliminating the potential sources of pollution is one of the major challenges of the twenty-first century, whereby sanitation services are essential for ensuring public health and environmental protection. In the present study, long-term monitoring (2011–2022) of shallow groundwater NO3− contamination in municipal environment was carried following the construction of the sewerage network (2014) in the light of the pre-sewerage situation. Our primary aim was to assess the long-term effects of sewerage on nitrate NO3− levels in the shallow groundwater and evaluate the efficiency of these sanitation measures over time. Based on the results, significant pollution of the shallow groundwater in the municipality was identified. During the pre-sewer period, NO3− concentrations exceeded the 50 mg/L limit in the majority of monitoring wells significantly, upper quartile values ranged between 341 and 623 mg/L respectively. Using Nitrate Pollution Index (NPI) and interpolated NO3− pollution maps, marked spatial north–south differences were detected. In order to verify the presence of wastewater discharges in the monitoring wells, the isotopic ratio shifts (δ) for 18O and D(2H) were determined, confirming municipal wastewater effluent. Variations in NO3−/Cl− molar ratios suggest also contamination from anthropogenic sources, including septic tank effluent from households and the extensive use of manure. Data series of 7 years (2015–2022) after the investment indicate marked positive changes by the appearance of decreasing trends in NO3− values confirmed by Wilcoxon signed rank test and ANOVA. By comparing the pre- and post-sewerage conditions, the mean NO3− value decreased from 289.7 to 175.6 mg/L, with an increasing number of monitoring wells with concentrations below the limit. Our results emphasise the critical role of sanitation investments, while also indicating that the decontamination processes occur at a notably slow pace. Detailed, long-term monitoring is therefore essential to ensure accurate follow-up of the ongoing changes. The results can provide information for local citizens and authorities to improve groundwater management tools in the region.

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Aqueous geochemistry and non-carcinogenic health risk through chloride and nitrate enriched groundwater of cosmopolitan Bangalore city, India

Cited by 2 publications

References 27 publications

Appraisal of hydrochemistry and non-carcinogenic risk assessment for the distribution of Fluoride and Nitrate in a semi-arid region

Appraisal of hydrochemistry and non-carcinogenic risk assessment for the distribution of Fluoride and Nitrate in a semi-arid region

Long-term spatiotemporal changes in nitrate contamination of municipal groundwater resources after sewerage network construction in the Hungarian Great Plain

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