No abstract

This study was carried out to determine the potability of selected brands of bottled water in Abeokuta metropolis. Water quality parameters such as physical (Color, turbidity, total suspended solids (TSS), total dissolved solids (TDS), total solids (TS)), chemical (pH, total hardness, alkalinity, chloride (Cl-), free chlorine, sulphate (SO4 2-), nitrate (NO3-) and iron (Fe 2+)) and microbiological (total coliform) were determined using standard procedures. The results obtained were subjected to statistical analysis for analysis of variance using SPSS 15.0. Mean values of water quality parameters were compared to World Health Organization (WHO) standards in drinking water. Results showed that water parameters like colour (< 7.0 Pt. Co.), TDS (<150 mg L-1), free chlorine (<0.5 mg L-1), Cl-(<27 mg L-1), SO4 2-(15 mg L-1), NO3-(<2.0 mg L-1), Fe 2+ (<0.1 mg L-1) and total coliform (0.0 count mL-1) were within WHO standards for drinking water indicating the potability of the bottled waters and hence, could be consumed without any possible health problems. @ JASEM

The present study assessed the water quality of Ogun river in southwestern Nigeria. Forty water samples were collected from twenty monitoring stations along Ogun River Basin between April 2013 and January 2014. Water samples were analyzed for important physical and chemical parameters such as temperature, pH, turbidity, total suspended solids (TSS), total dissolved solids (TDS), total solids (TS), electrical conductivity EC, dissolved --3-oxygen (DO), silica, anions (F , Cl , PO , NO ), hardness, alkalinity and metals (Fe, Pb, Cd, Na, K) using the 4 3 standard procedures. Data collected were subjected to simple descriptive (mean and standard deviation) and inferential statistics (Duncan Multiple Range Test, DMRT and Principal Component Analysis, PCA) using the Statistical Package for Social Sciences (SPSS, Windows' version 16.0). Results showed higher mean concentrations of turbidity (49.7±13.0 NTU) and total suspended solids (1205.2±4.7 mg/L) than the permissible limits of the World Health Organization (WHO) in drinking water. The values of phosphate (1.14±1.3 mg/L), Cd (0.02±0.01 mg/L) and Pb (0.33±0.05 mg/L) were also observed at higher concentrations than the permissible standards of the WHO. The sources of pollution to Ogun River Basin identified by varimax rotated PCA were industrial effluents, runoff, fertilizer and dissolved salts.ABSTRACT 375 https://dx.

This study was carried out to determine the hydrochemical characteristics of six springs in Oke-Igbo community, Ondo state, Nigeria. Water samples were collected from the upper, middle and lower course of each spring and analyzed for temperature, pH, electrical conductivity (EC), total dissolved solids (TDS), total alkalinity, total hardness, sodium (Na), potassium (K), calcium (Ca), magnesium (Mg), sulphate (SO4 2-), bicarbonate (HCO3-), chloride (Cl-), nitrate (NO3-), bacteria count and Escherichia coli. Data collected were presented in simple descriptive statistics and tables. Results showed that most of the measured parameters fell within the maximum acceptable standards set by World Health Organization (WHO) with the exception of microbiological parameter in which high coliform colonies were observed at the lower courses of each spring. The pH of the springs was generally low ranging from slightly acidic to acidic. The presence of bacteria count and Escherichia coli in the springs' water indicated fecal pollution, which could result in related water-borne diseases. Boiling of the spring water, is therefore, recommended before consumption.

Water scarcity remains a major challenge in all the developing nations of the world; not because of paucity of surface water (rivers and streams) that could be abstracted for treatment, but, finding a suitable and sustainable abstraction site. The main objective of this research is to identify good locations, where water treatment plant could be sited along Osun River in Ogun and Lagos State for sustainable production of potable water. To achieve this, water quality of Osun River upstream Lekki lagoon was investigated at three sampling stations; Ogbere, Igbonla and Lekki. Water parameters such as physical (temperature, solids, turbidity) chemicals (pH, electrical conductivity (EC), dissolved oxygen (DO), chemical oxygen demand (COD), nitrate, phosphate, chloride and sulphate, alkalinity, potassium, lead, chromium, iron) and bacteriological (feacal coliform) were determined using standard procedures. The results revealed that Ogbere and Igbonla stations are better locations where water could be abstracted from Osun River than Lekki stations due to low measured parameters (indicators of water pollution), which were within World Health Organization (WHO) acceptable limits. The findings also showed that while raw water abstraction from Osun River at Ogbere and Igbonla stations would require a conventional treatment, raw water from the Lekki lagoon (station) would require special treatment especially desalination due to high chloride and EC contents with expected cost implication.