Arsenic-contaminated groundwater and its potential health risk: A case study in Long An and Tien Giang provinces of the Mekong Delta, Vietnam

Nguyen, Van-Truc; Vo, Thi-Dieu-Hien; Tran, Thanh-Dai; Nguyen, Thi-Nhu-Khanh; Nguyen, Thanh-Binh; Dang, Bao‐Trong; Bui, Xuan‐Thanh

doi:10.1007/s11356-020-10837-6

Cited by 6 publications

(6 citation statements)

References 49 publications

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“…In Bac Lieu province, the concentrations of Fe and Mn were significantly lower than that of the study area, within the range of 40-120 μg Lˉ¹ and 10-60 μg Lˉ¹, respectively [42]. Meanwhile, the As content in groundwater in Soc Trang, Long An and Tien Giang were found to be higher than in the study area [51,70]. On the other hand, the As analysis results were similar to previous studies in Bac Lieu province [42], which did not detect As in groundwater.…”

Section: Spatial Variation In Groundwater Qualitymentioning

confidence: 96%

“…On the other hand, the As analysis results were similar to previous studies in Bac Lieu province [42], which did not detect As in groundwater. The difference in geological conditions can explain the variation in As concentration; for example, the soil in Long An has been recorded with a sulfuric horizon, and sulfuric acid is extracted from the soil leading to the release of As [70].…”

Section: Spatial Variation In Groundwater Qualitymentioning

confidence: 99%

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Seasonal Variations in Groundwater Quality under Different Impacts Using Statistical Approaches

Giao

Huynh

2023

Civ Eng J

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The objective of this study was to evaluate seasonal fluctuations in groundwater quality, determine the effects of different stressors on this resource, and recognize the potential pollution sources in a coastal region of southern Vietnam. Eleven samples collected in Ben Tre province during the dry and wet seasons were then analyzed for sixteen parameters, including pH, total dissolved solids (TDS), salinity, total hardness (TH), ammonium (NH₄⁺-N), nitrite (NO₂ˉ-N), nitrate (NO₃ˉ-N), sulfate (SO₄²ˉ), chloride (Clˉ), iron (Fe), manganese (Mn), lead (Pb), mercury (Hg), arsenic (As), coliforms, and Escherichia coli (E. coli). Pearson correlation analysis, principal component analysis (PCA), and cluster analysis (CA) were employed. The results indicated that total dissolved solids, salinity, total hardness, Clˉ, E. coli and coliform were detected as contaminants in groundwater samples. The trend of fluctuations in the parameters was mostly higher in the dry season. Which Mn and coliform significantly fluctuated between the dry and wet seasons. Activities in industrial-craft areas, landfills and seawater-intruded areas negatively impacted groundwater quality, typically TDS in industrial-craft areas, coliform and E.coliat the landfill area. Six principal components obtained from PCA could explain 93.6% of the variance, and all parameters are responsible for variations in groundwater quality. Geology, discharged wastewater, landfill leachate, agricultural activities, and saltwater intrusion can be considered representative factors. CA grouped the collected samples into four clusters based on the similarity in water properties. The analysis results showed that the locations in each cluster have outstanding water quality characteristics, clusters I and III have high TDS characteristics, cluster II has coliforms, and cluster IV sets of locations with high salinity. This study is promised to partially fill the gap in comprehensive information on groundwater quality in the coastal province so that policymakers can develop sustainable water management strategies in the future. Doi: 10.28991/CEJ-2023-09-03-01 Full Text: PDF

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Section: Spatial Variation In Groundwater Qualitymentioning

confidence: 96%

Section: Spatial Variation In Groundwater Qualitymentioning

confidence: 99%

Seasonal Variations in Groundwater Quality under Different Impacts Using Statistical Approaches

Giao

Huynh

2023

Civ Eng J

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“…The average daily dose (ADD) is calculated as equation (1). ADD=(C×IR×EF×ED)/(AT×BW) (1) Where: ADD is average daily dose from ingestion (mg/kg.day); C is arsenic content in groundwater samples (mg/L); IR is water intake rate, 1 L/day for children and 2 L/day for adults (Nguyen et al, 2020); EF is exposure frequency (365 days/year); ED is exposure duration, 10 years for children and 70 years for adults. AT is the averaging time for carcinogenic exposure, 3,650 days for children and 25,550 days for adults.…”

Section: Dose Assessment and Exposure Assessmentmentioning

confidence: 99%

“…CR=CSF×ADD (3) In which CSF is the cancer slope factor for arsenic (1.5 mg/kg.day) [14]. The highest safe standard for carcinogenic risk is 10 -4 [19].…”

Section: The Carcinogenic Risk (Cr) Is Calculated As Equationmentioning

confidence: 99%

“…Geological condition such as rich organic matter in sediment, low Eh in groundwater is the main cause for As mobilisation in these areas [13]. Consequently, As concentration is up to 1,300 ug/L in groundwater of the Mekong Delta and 3,000 ug/L in groundwater from the Red River Delta [14]. Because groundwater is very important sources for drinking and irrigation purposes, million people in Mekong Delta [15] and Red River Delta could be exposed to As.…”

Section: Introductionmentioning

confidence: 99%

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Health risk assessment of arsenic in drinking groundwater: A case study in a central high land area of Vietnam

Hoang

Vinh

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

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Arsenic contaminated groundwaters is a global environmental issue which cause serious problems for human health risks. 188 groundwater samples were collected in private wells of Lam Dong Province, a central highland area, Vietnam to investigate the health risks to the local people by using arsenic contaminated groundwater for drinking purpose. The result showed that the arsenic concentration is average of 14 μg/L and maximum of 500 μg/L. About 12% out of the total groundwater samples have arsenic concentration exceeded that value of 10 μg/L recommended for drinking water by World Health Organization (WHO, 2019). The health risk assessment showed that hazard quotient (HQ) value for adults was up to 60.6 with an average of 1.7 and about 14% of total samples show the HQ values greater than 1. The HQ value for children is average of 4.7 (maximum of 166.7) and about 23% of total groundwater samples show HQ > 1 for children. Cancer risk (CR) values were up to 27x10-4 (average of 8x10-4) for adults and 75x10-4 (average of 21x10-4) for children. About 26% and 29% of out of the total samples show CR value for adult and children greater than the CR (1×10-4) proposed by the USEPA. The result also indicated that the consumption of arsenic contaminated groundwater may seriously damage the human health. Therefore, groundwater in the area needs to be treated for arsenic removal before drinking to minimize the adverse effect on local communities’ health.

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Assessment of water, sanitation, and hygiene services in district health care facilities in rural area of Mekong Delta, Vietnam

Hoang

Binh

Bui

et al. 2022

Environ Monit Assess

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Arsenic-contaminated groundwater and its potential health risk: A case study in Long An and Tien Giang provinces of the Mekong Delta, Vietnam

Cited by 6 publications

References 49 publications

Seasonal Variations in Groundwater Quality under Different Impacts Using Statistical Approaches

Seasonal Variations in Groundwater Quality under Different Impacts Using Statistical Approaches

Health risk assessment of arsenic in drinking groundwater: A case study in a central high land area of Vietnam

Assessment of water, sanitation, and hygiene services in district health care facilities in rural area of Mekong Delta, Vietnam

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