Abstract
This study was carried out to determine the quality of rainwater from three different roofing materials (asbestos, aluminum and zinc) in Bodo Community of Rivers State, Nigeria. Samples were taken to the laboratory and analyzed using standard analytical procedures. The average result obtained ranged from 6.0-7.0, 40-66 μsi/cm, 18-48 mg/l, 32.52-86.67 mg/L, 0.06-3.18 mg/L, 5.02-13.76 mg/L, 2.79-5.02 mg/L, 0.16-0.77 mg/L, 0.27-5.79 mg/L, 0.24 0.62 mg/L and 0.03-4.08 mg/L for pH, conductivity, chloride, salinity, nitrate, sulphate, sodium, magnesium, calcium, iron and zinc respectively. Of interest were rainwater samples from asbestos roofing sheets which gave high calcium and magnesium content. Also, zinc roofing sheet gave high zinc and iron content compared to other roofing sheets. Physico-chemical properties and metal content of the harvested water from the roofing sheets were considerably different from those of control samples (water collected directly from raindrop). This could mean that the impinging of rain drop on the roof gradually erodes the roof material or could be as a result of anthropogenic inputs (deposits of pollutants in contact with roofing sheet) or geographical location. Considering the result of the analysis the harvested water could be put to other domestic use, as they can not be consumed directly. Keywords: rainwater, roof materials, water quality
Highlights
The issue of rainwater harvesting is a widely used technique for the provision and supply of both portable and non-portable supply of water especially in developing Worlds where the potable water are insufficient to meet the growing needs of the society due to rapid industrialization and development as well as population growth (Olaoye and Olaniyan, 2012)
Several studie s have looked at the effect of roofing material on harvested rainwater quality but common roofing materials and coating will vary across the country and the world (Olaoye and Olaniyan, 2012)
This paper investigates the physical and chemical properties of rainwater harvested from different types of roofing sheets
Summary
The issue of rainwater harvesting is a widely used technique for the provision and supply of both portable and non-portable supply of water especially in developing Worlds where the potable water are insufficient to meet the growing needs of the society due to rapid industrialization and development as well as population growth (Olaoye and Olaniyan, 2012). Despite having some clear advantages over other sources, rainwater use has frequently been rejected on the ground of its limited capacity or due to water quality concerns. This is unfortunate as in many cases some simple upgrading and the integrated use of rainwater collection with other technologies is all that is required to obtain a cost effective and reliable water supply solution (Ragab et al, 2003). Several studie s have looked at the effect of roofing material on harvested rainwater quality but common roofing materials and coating will vary across the country and the world (Olaoye and Olaniyan, 2012). This paper investigates the physical and chemical properties of rainwater harvested from different types of roofing sheets
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