Hydro-chemical assessment of groundwater pollutant and corresponding health risk in the Ganges delta, Indo-Bangladesh region

Biswas, Tanmoy; Pal, Subodh Chandra; Saha, Asish; Ruidas, Dipankar; Islam, Abu Reza Md. Towfiqul; Shit, Manisa

doi:10.1016/j.jclepro.2022.135229

Cited by 33 publications

(4 citation statements)

References 105 publications

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“…The minimum seasonal temperature of the region varies from 12 to 24 °C, and the maximum ranges from 25 to 35 °C. The area has the largest population density compared to other deltaic regions due to the high soil fertility 30 . The Sundarbans, the world's largest mangrove forest, covers the southernmost part of this deltaic region also known as the Sunderban delta.…”

Section: Study Areamentioning

confidence: 99%

“…Considering the ongoing phenomena related to groundwater resources worldwide, particularly in the Ganges delta, very few studies have been undertaken that couple hydrochemical factors with ML algorithms 30 – 32 . Literature review on groundwater vulnerability highlights that the Ganga–Brahmaputra delta in the Indo-Bangladesh region stands out as a significant area globally affected by arsenic contamination 17 , 33 .…”

Section: Introductionmentioning

confidence: 99%

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Hydro-chemical based assessment of groundwater vulnerability in the Holocene multi-aquifers of Ganges delta

Saha,

Pal,

Islam

et al. 2024

Sci Rep

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Determining the degree of high groundwater arsenic (As) and fluoride (F−) risk is crucial for successful groundwater management and protection of public health, as elevated contamination in groundwater poses a risk to the environment and human health. It is a fact that several non-point sources of pollutants contaminate the groundwater of the multi-aquifers of the Ganges delta. This study used logistic regression (LR), random forest (RF) and artificial neural network (ANN) machine learning algorithm to evaluate groundwater vulnerability in the Holocene multi-layered aquifers of Ganges delta, which is part of the Indo-Bangladesh region. Fifteen hydro-chemical data were used for modelling purposes and sophisticated statistical tests were carried out to check the dataset regarding their dependent relationships. ANN performed best with an AUC of 0.902 in the validation dataset and prepared a groundwater vulnerability map accordingly. The spatial distribution of the vulnerability map indicates that eastern and some isolated south-eastern and central middle portions are very vulnerable in terms of As and F− concentration. The overall prediction demonstrates that 29% of the areal coverage of the Ganges delta is very vulnerable to As and F− contents. Finally, this study discusses major contamination categories, rising security issues, and problems related to groundwater quality globally. Henceforth, groundwater quality monitoring must be significantly improved to successfully detect and reduce hazards to groundwater from past, present, and future contamination.

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Section: Study Areamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Hydro-chemical based assessment of groundwater vulnerability in the Holocene multi-aquifers of Ganges delta

Saha,

Pal,

Islam

et al. 2024

Sci Rep

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“…This region significantly falls under the lower ganga basin area of the Holocene Sediments predominantly collected in lacustrine, marine, and fluvial settings 26 . The porous alluvial and coastal sediments in the area allowed undesirable pollutants to seep and infiltrate into the groundwater aquifer 27 ; at a depth of 160 to 400 m below the surface, the aquifer is composed primarily of freshwater layers, whereas the shallow aquifer, about 60 m below the surface, is dominated by salty water. In the study region, parent rock played a noteworthy role in salinity intrusion, hydro-geological interaction and cation exchange which significantly impact water quality 28 .…”

Section: Study Areamentioning

confidence: 99%

Source identification and potential health risks from elevated groundwater nitrate contamination in Sundarbans coastal aquifers, India

Pal,

Biswas,

Jaydhar

et al. 2024

Sci Rep

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In recent years groundwater contamination through nitrate contamination has increased rapidly in the managementof water research. In our study, fourteen nitrate conditioning factors were used, and multi-collinearity analysis is done. Among all variables, pH is crucial and ranked one, with a value of 0.77, which controls the nitrate concentration in the coastal aquifer in South 24 Parganas. The second important factor is Cl−, the value of which is 0.71. Other factors like—As, F−, EC and Mg2+ ranked third, fourth and fifth position, and their value are 0.69, 0.69, 0.67 and 0.55, respectively. Due to contaminated water, people of this district are suffering from several diseases like kidney damage (around 60%), liver (about 40%), low pressure due to salinity, fever, and headache. The applied method is for other regions to determine the nitrate concentration predictions and for the justifiable alterationof some management strategies.

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“…However, its quality has decreased due to pollution, caused mainly by industrialization [4,5], which continuously produces large amounts of organic and inorganic pollutants [6][7][8]. Recent research is focused on the chemical characterization of groundwater using numerical models [9][10][11][12][13][14][15]. However, most of this research is related to the effects of inorganic substances on groundwater quality [16][17][18].…”

Section: Introduction and Objectivesmentioning

confidence: 99%

Environmental Assessment of Soil and Groundwater Pollution by BTEX Leaching in Valencia Region (Spain)

Rodrigo-Ilarri,

Rodrigo-Clavero,

Capilla

et al. 2023

Water

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The impact of hydrocarbon spills in the unsaturated zone is a significant environmental concern, particularly in locations where contamination arises from leaks in underground fuel storage tanks (USTs). This paper presents the outcomes achieved through the utilization of VLEACH, a finite-difference numerical model, to assess the concentrations of organic contaminants in the solid, liquid, and gas phases within the vadose zone. Additionally, it evaluates the mass transfer of pollutants to the aquifer as part of an environmental assessment for the placement of a forthcoming service station. The study encompasses an analysis of 18 scenarios under realistic conditions based on actual field data. These scenarios were constructed, taking into account various factors, including the nature of the leak (one-time or permanent), the depth of the phreatic level, and the soil conditions and properties. The results highlight the potential environmental consequences of a permanent leak as compared to those resulting from a specific accident. The findings further emphasize the substantial influence of soil moisture on transport phenomena within the vadose zone. Variations in soil moisture significantly alter hydraulic conductivity, impact magnitudes, transport velocities, and even the predominant transport mechanism. Consequently, precise delineation of soil moisture becomes a crucial parameter in such simulations. Additionally, it has been observed that each component of BTEX (benzene, toluene, ethylbenzene, and xylene) experiences varying transport velocities through the vadose zone. Benzene, having a greater propensity to concentrate in the liquid and gas phases, exhibits the swiftest movement through the vadose zone. The detection of benzene in aquifers can serve as an indicator of the potential future arrival of the remaining BTEX compounds.

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Hydro-chemical assessment of groundwater pollutant and corresponding health risk in the Ganges delta, Indo-Bangladesh region

Cited by 33 publications

References 105 publications

Hydro-chemical based assessment of groundwater vulnerability in the Holocene multi-aquifers of Ganges delta

Hydro-chemical based assessment of groundwater vulnerability in the Holocene multi-aquifers of Ganges delta

Source identification and potential health risks from elevated groundwater nitrate contamination in Sundarbans coastal aquifers, India

Environmental Assessment of Soil and Groundwater Pollution by BTEX Leaching in Valencia Region (Spain)

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