Impacts of natural and anthropogenic multiple sources of pollution on the environmental conditions of Ondo State coastal water, Nigeria
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Electronic Journal of Agricultural and Food Chemistry
The pollution status of the coastal water of Ondo State, Nigeria was investigated and found to be stressed by pollutants from both anthropogenic and natural sources. Solids (total solids, total dissolved solids, and total suspended solids), alkalinity, hardness, dissolved oxygen (DO), biochemical and chemical oxygen demand were evaluated as measures of environmental pollution of the area. Also, some ionic and metal components were analysed. Principal component analysis and linear correlation model of the data revealed that the coastal water was negatively impacted by pollutants from related anthropogenic sources and natural sources and that atmospheric precipitation and tidal activities ensure the perfect mix of the pollutants across the site. Seawater intrusion and erosion of the soil into the coastal water are natural activities stressing the water that it may not support uses. The observed DO of the water system was high (mean value – 7.85mgO2/L) due to tidal agitation while the BOD also were lower than 3mgO2/L in most sites. However, the concentrations of chloride and sulphate in the water system were on the high side ranging from 13,074– 17,366mg/L and 2,119 – 3,143mg/L respectively. The metal components investigated were beneficial to human health but exist in concentration too high for human consumption. Fe, Mn, Cu, and Zn were found to be anthropogenic metals from related sources in this coastal area having correlated positively and significantly with measures of organic matter and each other. There were also indications of natural contributions of Fe, Mn & Cu from the soil of the coastal area. Therefore, there is a growing need to monitor and control the release of pollutant into the coastal water system of developing countries having been overlooked.
anthropogenic activities , Pollution , Ondo Coast , metals , water quality , Research Subject Categories::NATURAL SCIENCES::Chemistry
Adebowale, K. O., Agunbiade, F. O., & Olu-Owolabi, B. I. (2008). Impacts of natural and anthropogenic multiple sources of pollution on the environmental conditions of Ondo State coastal water, Nigeria. Electronic Journal of Environmental, Agriculture and Food Chemistry, Vol.7(4), 2797-2881pp.