Trace Elements as Indicators of Quality of Drinking Water in Offa Metropolis, Kwara State, Nigeria

Abstract

This study involved the determination of trace elements in drinking water in Offa Metropolis. Drinking water samples were collected from tap, well, borehole, stream and sachet water and analysed for Cr, Co, Cu, Fe, Mg and Mn using Atomic Absorption Spectrophotometer. The results obtained show the concentration ranges of the metals in the samples as follows: Cr (0.01-0.27)mgL-1 , Co (0.000-0.018) mgL-1 , Cu (0.001-0.023) mgL-1 , Fe (0.025-0.13) mgL-1 , Mg (0.007-0.082) mgL-1 and Mn (0.002-0.009) mgL-1. In conclusion these concentrations are within the permissible limit of the WHO drinking water quality guidelines except chromium with twenty-one samples above the WHO threshold limit and four samples within the limit.

Comparative study of household water treatment in a rural community in Kwara state, Nigeria

“…Though Cr was not found in the water samples from the public tap, a significant amount of 0.1 mg L -1 was found in the bore-hole water samples above the maximum permissible limit of 0.1 mg L -1 set by the WHO.. Cu and Mn concentrations in the public water tap sample (Table 3) were within the permissible limits of the WHO (Table 5). The mean concentrations of Cu in the raw bore-hole water sample (0.1mgW UV ) and the raw public tap water sample (0.2mgW UV ) were higher than the range (0.01-0.023mgW UV ) obtained for the neighboring Offa community [18]. Mn was not detected in the bore-hole water sample.…”

Classification of Regions with Endemic Diseases Based on Trace Element Concentrations in Groundwater

“…We determined trace elements in drinking water (Offa Metropolis) samples collected from tap, well, borehole, stream, and sachet water that was analyzed using atomic absorption spectrophotometry. These concentrations are within the permissible limits of the WHO drinking water quality guidelines (except some samples above the WHO threshold limit and some samples within the limit) [7]. Fluoride concentrations in drinking water are important for both bone and tooth health.…”

Quality Assessment of the Changes in the Physico-Chemical Parameters in Pipe-Borne Water Supplied In Kano Metropolis, Nigeria

“…The taps were allowed to run for at least two minutes before filling the container which has been rinsed severally with the water to be collected and the temperature was checked immediately. Each sample was collected three times at an interval of about 5 hours to form a representative of the whole water for that particular area or zone [11].…”

“…Each of the 5.0 liters samples was evaporated to dryness using Pyrex beaker and hot plate. The residues were digested with 50cm 3 of 0.25moldm -3 nitric acid and transferred into 120cm 3 plastic containers and then analyzed using atomic absorption spectrometry (AAS) [11].…”