Groundwater salinization and associated co-contamination risk increase severe drinking water vulnerabilities in the southwestern coast of Bangladesh

Rakib, Muntaha; Sasaki, Jun; Matsuda, Hirotaka; Quraishi, Shamshad B.; Mahmud, Juel; Bodrud-Doza, Md.; Ullah, A. K. M. Atique; Fatema, Konica J.; Newaz, Md. Asif; Bhuiyan, Mohammad Amir Hossain

doi:10.1016/j.chemosphere.2019.125646

Cited by 101 publications

(43 citation statements)

References 69 publications

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“…To determine the karst water's suitability for drinking purposes, based on the GWQI (Table 5), the quality of groundwater was divided into five classes ranging from good quality to extremely poor quality. The GWQI < 50 indicates excellent quality, while 50 < GWQI < 100 suggests good quality, 100 < GWQI < 150 indicates medium quality, 150 < GWQI < 200 indicates poor quality, and GWQI >200 indicates extremely poor quality [51,52]. However, this GWQI does not consider the microbiologic load in the GWQI calculation.…”

Section: Groundwater Quality Index (Gwqi)mentioning

confidence: 99%

Water Quality and Hydrogeochemical Characteristics of Some Karst Water Sources in Apuseni Mountains, Romania

Hoaghia

Moldovan

Kovács

et al. 2021

Water

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Human activities and natural factors determine the hydrogeochemical characteristics of karst groundwaters and their use as drinking water. This study assesses the hydrogeochemical characteristics of 14 karst water sources in the Apuseni Mountains (NW Romania) and their potential use as drinking water sources. As shown by the Durov and by the Piper diagrams, the chemical composition of the waters is typical of karst waters as it is dominated by HCO3− and Ca2+, having a circumneutral to alkaline pH and total dissolved solids ranging between 131 and 1092 mg L−1. The relation between the major ions revealed that dissolution is the main process contributing to the water chemistry. Limestone and dolostone are the main Ca and Mg sources, while halite is the main Na and Cl source. The Gibbs diagram confirmed the rock dominance of the water chemistry. The groundwater quality index (GWQI) showed that the waters are of excellent quality, except for two waters that displayed medium and good quality status. The quality of the studied karst waters is influenced by the geological characteristics, mainly by the water–rock interaction and, to a more limited extent, by anthropogenic activities. The investigated karst waters could be exploited as drinking water resources in the study area. The results of the present study highlight the importance of karst waters in the context of good-quality water shortage but also the vulnerability of this resource to anthropogenic influences.

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Section: Groundwater Quality Index (Gwqi)mentioning

confidence: 99%

Water Quality and Hydrogeochemical Characteristics of Some Karst Water Sources in Apuseni Mountains, Romania

Hoaghia

Moldovan

Kovács

et al. 2021

Water

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“…The pH of Ni and Zn stock solutions were also adjusted to 5 using the same buffer solution. This pH was chosen to avoid the Ni and Zn precipitation, as shown in Figure S1, where the real groundwater pH near coastal areas was in the range of 4.71-7.53 [23].…”

Section: Sorption Experimentsmentioning

confidence: 99%

The Influence of Salinity on the Removal of Ni and Zn by Sorption onto Iron Oxide- and Manganese Oxide-Coated Sand

2020

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The influence of salinity on the single and binary sorption of Ni and Zn onto iron oxide- and manganese oxide-coated sand (IOCS and MOCS) was investigated at pH = 5. The single sorption experimental data were fitted to Freundlich, Langmuir, Dubinin–Radushkevich, and Sips models, and a nonlinear sorption isotherm was observed (NF = 0.309–0.567). The higher Brunauer–Emmett–Teller (BET) surface area (ABET) and cation exchange capacity (CEC) of MOCS contributed to the higher maximum sorption capacities (qmL) of Ni and Zn than that of IOCS. The Ni sorption capacities in the single sorption were higher than that in the binary sorption, while the Zn sorption capacities in the single sorption were less than that in the binary sorption. The single and binary sorptions onto both IOCS and MOCS were affected by the salinity, as indicated by the decrease in sorption capacities. Satisfactory predictions were shown by the binary sorption model fitting including P-factor, ideal adsorbed solution theory (IAST)–Freundlich, IAST–Langmuir, and IAST–Sips; among these, the P-factor model showed the best fitting results in predicting the influence of salinity of Ni and Zn in the binary sorption system onto IOCS and MOCS. IOCS and MOCS offer a sustainable reactive media in a permeable reactive barrier (PRB) for removing Ni and Zn in the presence of salinity.

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“…Electrical conductivity (EC) actually measures the ionic process of a solution that enables it to transmit current. According to WHO standards, the EC value of drinking water should not exceed 400 μS/cm (Rakib et al, 2020). However, the conductivity of all the drinking water samples collected from the schools ranged from 54.97±3.06 -376.87±91.2, which indicated the presence of some ionic solutions in water but were good for drinking.…”

Section: Electrical Conductivity (µS/cm)mentioning

confidence: 98%

Assessment of Water Used In Basic Schools And Its Impact on School Feeding Programme, A Case Study in Mampong Municipality

Kuffour¹

2020

EASJALS

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Groundwater salinization and associated co-contamination risk increase severe drinking water vulnerabilities in the southwestern coast of Bangladesh

Cited by 101 publications

References 69 publications

Water Quality and Hydrogeochemical Characteristics of Some Karst Water Sources in Apuseni Mountains, Romania

Water Quality and Hydrogeochemical Characteristics of Some Karst Water Sources in Apuseni Mountains, Romania

The Influence of Salinity on the Removal of Ni and Zn by Sorption onto Iron Oxide- and Manganese Oxide-Coated Sand

Assessment of Water Used In Basic Schools And Its Impact on School Feeding Programme, A Case Study in Mampong Municipality

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