Investigating The Influence Of Age And Materials of Roofing Sheets On The Quality Of Harvested Rainwater In Sango Ota, Nigeria.
Journal Title: IOSR Journal of Applied Chemistry (IOSR-JAC) - Year 2018, Vol 11, Issue 7
Abstract
This study was carried out to investigate the influence of age and materials of roofing sheets on the quality of harvested rainwater in Sango Ota of Ogun State Nigeria, between the months of June and August 2016. The harvested rainwater samples were stored properly and analyzed for physicochemical properties and metal contents. The physicochemical analysis results showed a temperature range of 27.50 oC - 27.80 oC, pH range of 6.51 - 6.81, Dissolved Oxygen range of 5.36 - 8.37mg/L, conductivity range of 7.55-99.25μS/cm, color of 5.00 TCU, turbidity range of 0.76-2.65mg/L, total solids range of 8.70-102.67mg/L, total suspended solids range of 5.60-53.46mg/L and total dissolved solids range of 3.10-56.28mg/L. All these physical quantities had concentration within the recommended guidelines of the World Health Organization, though pH of all the samples tends towards the lower limit of 6.5 of the WHOguidelines. The chemical qualities of Acidity ranged between 6.46-15.11mg/L, alkalinity 2.32-10.55mg/L, total hardness 10.15-44.45m/L, calcium hardness 6.05- 22.23mg/L, magnesium hardness 4.10-22.22mg/L, chloride 16.11-33.11mg/L, nitrate 1.26-6.23mg/L, nitrite 0.003 - 0.045mg/L while sulphate had 1.12-17.33mg/L and phosphate had 1.06 – 1.87mg/L and some are below detection limit.All these chemical quantities had concentration within the recommended guidelines of the World Health Organization.Metal qualities ranged between 0.03mg/L for Chromium and 1.08mg/L for Iron. All these values are seen to conform to limits stipulated by the WHO as a guide for potable water. The values obtained were observed not to follow any regular pattern as values for some aged roofing materials were more than those obtained for new roofing materials and values for some new roofing materials were more than those obtained for aged roofing materials, while those for asbestos were more than those for the corrugated iron sheets. It was found in this investigation that the material from which the roof is made may have effect on the rainwater quality as there was a contrast between the concentrations of the roofing materials samples and the control samples. Also, the age of the roofing materials adversely affects the water quality as there are contrast. This can be attributed to the deterioration of aged sheets leading to the release of the embedded chemicals, metals and contaminants into the water as they fall and strike it.
Authors and Affiliations
Osunkiyesi A. A. , Taiwo A. A. , Olawunmi M. O. , Adepoju M. A. , Akindele O. I.
Keywords
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