Occurrence and Distribution of Arsenic, Antimony and Selenium in Shallow Groundwater Systems of Ibadan Metropolis, Southwestern Nigerian

Etim, Effiong Ukorebi

doi:10.5696/2156-9614-7-13.32

Cited by 23 publications

(14 citation statements)

References 40 publications

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“…The amount of selenium in groundwater is much higher than that in seawater [13] because of selenium elution from the parent rocks and excessive fertilization of soils with mixtures rich in selenium compounds [17]. The selenium content determined in groundwater in Poznań (Poland) is 0.17–0.44 µg/L [18]. According to the recommendations of the World Health Organization (WHO), the acceptable amount of selenium in drinking water is 10 μg/L [19].…”

Section: Occurrence Of Selenium In the Environmentmentioning

confidence: 99%

Selenium–Fascinating Microelement, Properties and Sources in Food

2019

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Selenium is a micronutrient that is essential for the proper functioning of all organisms. Studies on the functions of selenium are rapidly developing. This element is a cofactor of many enzymes, for example, glutathione peroxidase or thioredoxin reductase. Insufficient supplementation of this element results in the increased risk of developing many chronic degenerative diseases. Selenium is important for the protection against oxidative stress, demonstrating the highest activity as a free radical scavenger and anti-cancer agent. In food, it is present in organic forms, as exemplified by selenomethionine and selenocysteine. In dietary supplementation, the inorganic forms of selenium (selenite and selenate) are used. Organic compounds are more easily absorbed by human organisms in comparison with inorganic compounds. Currently, selenium is considered an essential trace element of fundamental importance for human health. Extreme selenium deficiencies are widespread among people all over the world. Therefore, it is essential to supplement the deficiency of this micronutrient with selenium-enriched food or yeast cell biomass in the diet.

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Section: Occurrence Of Selenium In the Environmentmentioning

confidence: 99%

Selenium–Fascinating Microelement, Properties and Sources in Food

2019

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“…Thus, the bioaccumulation potential of selenium can further cause toxicity to the natural ecosystem. When animals absorb or accumulate extremely high concentrations of selenium it can cause reproductive failure and birth defects [35][36][37].…”

Section: Selenium In Animals: Toxic Dose and Health Symptomsmentioning

confidence: 99%

“…For instance, in many French regions, geogenic sedimentary sources of selenium were identified as responsible for the selenium concentrations exceeding the European limit in many wells designated to produce drinking water [36]. Selenium toxicity is prevalent in 1000 ha in Hoshiarpur and Nawanshahar of Nigerian districts where about 11 and 4% of groundwater samples were found unfit for drinking and irrigation purposes, respectively [35]. Selenium carries the narrowest range between its nutritional deficiency (< 40 μg/d) and toxicity (> 400 μg/d) with respect to the daily intake [17] (Table 1).…”

Section: Selenium In Humans With Epidemiological Perspectivementioning

confidence: 99%

“…Recently issues of selenium water contamination are associated with selenium biochemical risks. For instance, from the 210 ground water samples taken in Nigeria, selenium concentration of 7.33 ± 6.22-46.3 ± 22.4 µg/L is reported following the needed assessment vis-à-vis risk of geogenic contamination which is almost greater than that of WHO's limit of 10 µg/l [35] ( Table 1). The distribution of selenium was fairly uniform in the samples studied in different locations that suggested the influence of geogenic factors.…”

Section: Selenium Occurrence and Distribution In Groundwater And Surfmentioning

confidence: 99%

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A review on environmental selenium issues

Gebreeyessus

Zewge

2018

SN Appl. Sci.

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Selenium is an essential element since it is necessary for metabolism and is also toxic to the living things if it is consumed above the desirable limit. For instance, up to 40 µg per d of dietary selenium is essential for human health; however, consumption of a little over 400 µg per d could result in adverse physiological problems. In the environment, selenium occurs in different species; of which selenate and selenite are its most toxic forms accounting for 95% of selenium toxicity. Though, selenium fortification is important for normal human physiology in selenium deficient environments, it needs to be minimized or removed from selenium rich environmental media. Thus, its quantification is significantly important to control per limit. Currently there is advancement in the detection and quantification of selenium in environmental including the use of a Hydride Generating Atomic Absorption Spectroscopy. Due to the excess occurrences of selenium in different locations the removal techniques from geogenic or anthropogenic sources include microbial metabolism, phytoremediation, sorption, membrane separation, coagulation, ion exchange and catalytic reduction. Most of all, the microbial removal is applied in drinking water supply and in selenium recovery from wastewater sludge. Though current selenium removal from sorption studies reported better efficiency, phytoremediation appears attractive due to its field scale application advantage. However, the fate of selenium following phytoremediation remains unaddressed.

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“…high environmental arsenic concentrations. UNICEF estimates that in Vietnam there are approximately 10-15 million of the people (about 13.5 % of the population) using drinking water from tube wells, the arsenic concentrations of which ranged from 8-579 ppb (mean 301 ppb)[23].According to E t i m[12] there is a health risk due to increased occurrence of arsenic, antimony and selenium in shallow groundwater systems of Ibadan Metropolis(Southwestern Nigeria) caused by its significantly higher levels with 100 % of examined samples exceeding the WHO safe limits. While the Environmental Protection Agency (EPA) allows 0.006 parts of antimony per million parts of drinking water, the guidelines for Drinking-water Quality [49], WHO established a tolerable daily intake (TDI) of 6 μg.kg -1 body weight/day for antimony [52, 53], and the limit for Sb in drinking water, pursuant to the applicable laws in the SR, is 0.05 mg.l -1 .…”

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confidence: 99%

Individual Water Sources and their Potential Effect on Human and Animal Health in Environmentally Burdened Region

Hrušková¹,

Sasáková

Bujdošová³

et al. 2020

Folia Veterinaria

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The quality of water in a well that serves as an individual drinking water source, located in the Slovakian region previously burdened with mining activities, was investigated in relation to the quality of surface water in the same region. Selected microbiological and physicochemical parameters were determined in samples of ground water (well) and surface water (brook and river). Plate counts of coliform bacteria, E. coli, enterococci and bacteria cultivated at 22 °C and 37 °C were determined. Microbiological quality of samples collected from the well was generally satisfactory. Examination of the samples of surface water (river) showed a significant organic pollution indicated by fluorescence spectra. In all water samples the values of: pH, electrical conductivity, dissolved oxygen, ammonium ions, nitrites, nitrates, chlorides and chemical oxygen demand (CODMn) were below the limits set by the state legislation. In the surface water, high levels of arsenic were found. The sum of calcium and magnesium in the well water was close to or below the recommended minimum level. In this well water, the level of antimony exceeded 10-fold the maximum limit for drinking water and was of the largest concern as this well water has been used for drinking, cooking, and watering of animals and vegetables for a long period of time. This poses a risk of accumulation of this metalloid in the food chain.

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Occurrence and Distribution of Arsenic, Antimony and Selenium in Shallow Groundwater Systems of Ibadan Metropolis, Southwestern Nigerian

Cited by 23 publications

References 40 publications

Selenium–Fascinating Microelement, Properties and Sources in Food

Selenium–Fascinating Microelement, Properties and Sources in Food

A review on environmental selenium issues

Individual Water Sources and their Potential Effect on Human and Animal Health in Environmentally Burdened Region

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