Chemical and in vitro bioanalytical assessment of drinking water quality in Manhiça, Mozambique

Villanueva, Cristina M.; Grau-Pujol, Berta; Evlampidou, Iro; Escola, Valdemiro; Goñi-Irigoyen, Fernando; Kuckelkorn, Jochen; Grummt, Tamara; Arjona, Lourdes; Lázaro, Beatriz; Etxeandia, Arsenio; Ulibarrena, Enrique; Nhacolo, Ariel; Muñóz, José

doi:10.1038/s41370-020-00282-5

Cited by 4 publications

(5 citation statements)

References 32 publications

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“…A source of fluoride in natural water is the fluoride‐containing minerals under the Earth's surface (Villanueva et al, 2021). Similarly, the disposal of untreated industrial wastes in open fields near water sources can enhance fluoride concentrations in water.…”

Section: Resultsmentioning

confidence: 99%

“…Nitrate and nitrites are found naturally in groundwater, and the health effects of nitrate are attributed to its reduction in nitrites (Jordao et al, 2002). The main biological effect of nitrite is the oxidation of normal hemoglobin to methemoglobin, which cannot transport oxygen to the tissues (Van Busse et al, 2012; Villanueva et al, 2021). In groundwater, nitrate is leached from nitrate salts; however, high concentrations are associated with animal and human wastes, open septic systems, and fertilization of farms (Sirajudeen & Mubashir, 2013).…”

Section: Resultsmentioning

confidence: 99%

“…A source of fluoride in natural water is the fluoride-containing minerals under the Earth's surface (Villanueva et al, 2021) 2020) documented the significant concentration of fluoride (0.001 and 2.37 mg/L) in the drinking water supply in Kathmandu Valley. An overdose of fluoride may cause bone demineralization by damaging bones and joints, whereas an insufficient amount may lead to osteoporosis, which affects bone mass and results in a rise in bone fragility (Burlakoti et al, 2020).…”

Section: Analysis Of Anionsmentioning

confidence: 99%

“…With the increase in contaminants such as inorganic and organic compounds as well as bacteria in water resources, new methodologies are expected to provide cost‐effective and feasible remediation solutions (Fadaei & Sadeghi, 2014). Drinking water quality has been weakened significantly due to the presence of toxic elements, which even in trace amounts can cause serious health hazards (Aryal & Liakopoulou‐Kyriakides, 2015; Shigut et al, 2017; Villanueva et al, 2021). Water contaminated with animal and human feces, domestic and industrial sewage, and agricultural runoff are important means of transmission of microorganisms to people (Ahmed et al, 2020; Fadaei & Sadeghi, 2014).…”

Section: Introductionmentioning

confidence: 99%

“…The availability of safe drinking water is one of the primary prerequisites for human well‐being; however, most people in the world struggle to access it (Li & Wu, 2019; NDWQS, 2005; Reyes‐Toscano et al, 2020; WHO, 2017). Access to safe and clean drinking water remains a problem in developing countries, especially in rural areas (Edokpayi et al, 2018; Li & Wu, 2019; Villanueva et al, 2021). Legislations of many developing countries consider the provision of safe drinking water as a major responsibility (Edokpayi et al, 2018; Li & Wu, 2019; Shigut et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

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An analysis of drinking water quality parameters to achieve sustainable development goals in rural and urban areas of Besisahar, Lamjung, Nepal

Aryal

2022

World Water Policy

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Nepal has a high annual rainfall, but it still faces numerous challenges in ensuring good water quality. A total of 20 water samples were collected from five springs, seven rivers, one borehole, and seven reservoir tanks. pH, electrical conductivity, total dissolved solids, turbidity, total hardness as CaCO3, and residual chlorine in the water samples were all found to be within the National Drinking Quality Standards (NDWQS) and World Health Organization (WHO) recommendations. The chemical oxygen demand (COD) was calculated in the range of 35.65–70.826 mg/L, where most of the water samples exceeded the WHO's threshold. The mean biological oxygen demand (BOD) value was 2.929 mg/L, which was below the WHO tolerance level. Moreover, the concentrations of zinc, copper, chromium, arsenic, cadmium, lead, chloride, fluoride, nitrate, nitrite, sulfate, and phosphate species studied here were lower than those of the NDWQS and WHO standards. It was found that most of the water samples crossed the threshold standard for Escherichia coli and total coliforms, respectively. The iron concentrations in BW8, PW9, and RVW10 were estimated at 0.321, 0.301, and 0.367 mg/L, manganese in BW8, RVW10, and PW9 at 0.191, 0.142, and 0.104 mg/L, and selenium in RVW10 and RVW14 at 0.041 mg/L, which exceeded the WHO permissible limit. In most samples, the contamination factor (CF) values of COD exceeded unity, and the pollution load index (PLI) was calculated at 1.3. In the CF analysis of Fe, Mn, and Se, it was found that some water samples were polluted and not suitable for drinking. Statistical analysis of water quality parameters revealed a significant correlation. Overall, the results suggest that governments and development agencies should enhance their involvement in water resources management to ensure sustainability.

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Section: Resultsmentioning

confidence: 99%