Assessment of groundwater quality based on principal component analysis and pollution source-based examination: a case study in Ho Chi Minh City, Vietnam

Nguyen, Binh Thanh; Nguyen, Tham Minh Thi; Bach, Quang‐Vu

doi:10.1007/s10661-020-08331-0

Cited by 40 publications

(17 citation statements)

References 49 publications

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“…Moreover, Table 2 also represents the comparison between some existing literature data (Zakir et al, 2020;Saha et al, 2019;Rahman et al, 2013;Bodrud-doza et al, 2020;Kumar et al, 2019;Maw et al, 2020;Abeer et al, 2020;Muhammad et al, 2011;Mohammadi et al, 2019;Qiao et al, 2020;Dong et al, 2020;Nguyen et al, 2020;Le bot et al, 2016;Momot et al, 2005;Szuster-Janiaczyk et al, 2018;Abdeldayem, 2019;Opoku et al, 2020;Egbueri et al, 2020) and the determined heavy metal(oid)s concentrations in the tap water samples of the present study. In comparison to literature data, the mean concentration of Fe, Cr, Pb, Co, Ni, Cd were obtained significantly higher than the tabulated literature data, contrariwise, As concentration in the present study were much lower than the literature data.…”

Section: Metal(oid)s In Tap Water and Their Distributionsmentioning

confidence: 81%

Public health vulnerability due to the exposure of dissolved metal(oid)s in tap water from a mega city (Dhaka, Bangladesh)

Hossain

Anik

Khan

et al. 2021

Preprint

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Tap water is the sole source of water in urban cities but gradually being polluted by potentially toxic elements due to unplanned urbanization. The south Asian megacity, Dhaka (capital of Bangladesh) encounters drastic water pollution resulting mainly from anthropogenic differential factors. Consumption of such polluted water distributed to residents by pipelines can trigger health risks. Therefore, this study investigated the public health vulnerability associated with dissolved metal(oid)s in tap water collected across Dhaka city. The concentrations of Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Cd, Hg and Pb in measured tap water ranged from 8-156, 7–73, 400-20100, 12–110, 7-101, 12–136, 12–908, 0.03–9.75, 1–5, 0.22–1.30, and 8-118 µg/L, respectively. Among the observed elements, Pb, Cr, and Fe concentrations in 18%, 26%, and 75% of sampling sites, respectively, exceeded the standard guideline criteria of Bangladesh. Entropy-based water quality index demonstrated that ~ 12% of sampling sites possessed water unsuitable for drinking and other household works. The dominant sources of water pollution in this region are industrial effluents and domestic sewage. Both non-carcinogenic and carcinogenic health risks are invoked mostly from ingestion of Co and Pb. Regular consumption of this tap water without further pretreatment may result in detrimental health consequences to both children and adults due to the physiological accumulation of toxic elements over time. This study highlighted a comprehensive scenario of the potentially toxic elements in the tap water of Dhaka city, which will allow policymakers to take adequate measures for sustainable water quality management.

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Section: Metal(oid)s In Tap Water and Their Distributionsmentioning

confidence: 81%

Public health vulnerability due to the exposure of dissolved metal(oid)s in tap water from a mega city (Dhaka, Bangladesh)

Hossain

Anik

Khan

et al. 2021

Preprint

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“…The quantity of the three-point density of environmental factors (sewage treatment plants, garbage treatment plants, and garbage dumps) in a single county was determined using ArcGIS software according to a previously reported method [ 25 , 26 ]. The Point density of environmental factors ( m ), which refers to the number of environmental factors in each county in number/km 2 , was obtained using the Spatial Connection tool in ArcGIS software [ 27 ], as shown in Equation (2):

where data of environmental factors in the county is the number of vector planes obtained by longitude and latitude in units of number, and county area is the area of the county in units of km 2 .…”

Section: Methodsmentioning

confidence: 99%

Environmental and Socioeconomic Factors for Gastric Cancer in 14 Counties of the Huai River Basin from 2014 to 2018

Lin

Wang

et al. 2022

IJERPH

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To explore the potential relationship between environmental and socioeconomic factors and the risk of gastric cancer (GC) in the Huai River Basin, the GC incidence rate (GIR) and GC mortality rate (GMR) data from 2014 to 2018 in 14 counties of the Huai River Basin were collected from the Chinese Cancer Registration Annual Report. Environmental and socioeconomic parameters were collected through the Statistical Yearbook. The 14 counties were classified into three groups with low, moderate, and high risk of GC according to the point density of environmental factors (PDF) and index of socioeconomic factors (ISF). Significant differences in GIR and GMR were found among the counties with PDF (χ2 = 21.36, p < 0.01) and ISF (χ2 = 11.37, p < 0.05) levels. Meanwhile, significant differences in mortality rate were observed among counties with different PDF (χ2 = 11.25, p < 0.01) and ISF (χ2 = 18.74, p < 0.01), and the results showed that the ISF and PDF were increased while the GIR and GMR were decreased. Meanwhile, there was a lag effect between them, and we used two models to explore the lag effects between ISF, PDF and GIR and GMR; the coefficient influence between the ISF lag phase and GIR was −2.9768, and the coefficient influence between PDF and the lag phase on the GIR was −0.9332, and there were both significant impact when there was a probability of more than 95%. The results showed that the higher the ISF and PDF that lags in one stage, the more GIR was reduced, while the impact of the ISF and PDF on lag stage on mortality was not obvious. We used differential GMM to test the results, and also research results were relatively robust. Overall, GIR and GMR decreased with increasing point density of environmental factors and index of socioeconomic factors.

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“…Other sources of TOC in the upstream section can be the cause of TOC compensation due to the aerobic degradation process. According to a well-water quality survey from 233 wells in agricultural, urban and industrial areas of HCMC, the wells with high concentration of organic carbon are only observed in agricultural areas (upstream of Saigon River) (Nguyen et al, 2020b). This suggests that agricultural activities in the upstream Saigon River can release high TOC content, affecting groundwater and surface water in this area.…”

Section: Aerobic Degradation Of Organic Carbon (Aerobic Respiration)mentioning

confidence: 99%

“…In the Saigon River, about 90% of the nutrients from untreated wastewaters are retained in sludge within the canal network of HCMC and partly lost (denitrified into N 2 ) (Nguyen et al, 2020a(Nguyen et al, , 2020b. These polluted sludges are occasionally removed through canal dredging programs.…”

Section: Biogeochemical Reaction Fluxesmentioning

confidence: 99%

Biogeochemical functioning of an urbanized tropical estuary: Implementing the generic C-GEM (reactive transport) model

Nguyen

Némery

Gratiot

et al. 2021

Science of The Total Environment

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Estuaries are amongst the most productive ecosystems of the land ocean continuum, but they are also under high anthropic pressures due to coastal urbanization. Too sparse observations have hindered the understanding of complex interactions between water quality and estuarine hydrodynamics and biogeochemical transformations. Until now, estuarine modelling studies have mainly focused on temperate estuarine systems in industrialized countries. This study investigates the responses of a tropical estuary to pollution load from a megacity (Ho Chi Minh City, Southern Vietnam) by applying a one-dimensional, biogeochemical estuarine model (C-GEM). The Saigon River Estuary flows through the megacity of Ho Chi Minh (HCMC) and is subject to episodic hypoxia events due to wastewater inputs from urban discharges. Good agreements are found between simulation outputs and observations for tidal propagation, salinity, total suspended sediment, and water quality variables in dry season in Saigon River Estuary. C-GEM reproduces the increases in ammonium, total organic carbon, phytoplankton and dissolved oxygen depletion in the urban section of the Saigon River as an impact of untreated wastewaters from HCMC. The steadystate version of C-GEM also reveals the formation of a pollutant cloud (30-km stretch) resulting from the combined effects of tidal fluctuation and low flushing capacity during the dry season. Furthermore, the quantification of the reaction fluxes simulated by the model demonstrates that nitrification is the main process removing NH 4 + from the Saigon River. For the first time in such a type of environment, our study demonstrates the effectiveness of C-GEM at unraveling the complex interplay between biogeochemical reactions and transport in a tropical estuary with a minimized data requirement. This is significant for tropical estuaries in developing countries, where intensive monitoring programs are rare and have thus been rarely the object of modelling investigations.

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Assessment of groundwater quality based on principal component analysis and pollution source-based examination: a case study in Ho Chi Minh City, Vietnam

Cited by 40 publications

References 49 publications

Public health vulnerability due to the exposure of dissolved metal(oid)s in tap water from a mega city (Dhaka, Bangladesh)

Public health vulnerability due to the exposure of dissolved metal(oid)s in tap water from a mega city (Dhaka, Bangladesh)

Environmental and Socioeconomic Factors for Gastric Cancer in 14 Counties of the Huai River Basin from 2014 to 2018

Biogeochemical functioning of an urbanized tropical estuary: Implementing the generic C-GEM (reactive transport) model

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