: Hydrochemical investigation of groundwater samples was carried out in Yenagoa, Southern Nigeria in an attempt to determine the suitability of the groundwater quality for domestic use. Twenty four groundwater samples were collected from domestic boreholes in the study area and were analyzed for major ions. The hydrochemical parameters determined were statistically examined and correlated. Factor analysis was applied to extract the principal factors responsible for the variation in the hydrochemistry. Water Quality Index (WQI) rating was calculated to quantify overall suitability of the water for human consumption. The results show that the correlation coefficient matrix between Electrical Conductivity (EC), Na + and Cl - was significant, which is an indication of seawater influence on the groundwater quality. The geochemistry of the groundwater is controlled mainly by rock-water interaction, ion exchange reactions, reductive dissolution of iron bearing minerals and weathering of silicate group of minerals. The WQI of the study area ranged from 5.7-32.7, indicating excellent water quality.
{"title":"Hydrochemistry and Groundwater Quality in a Quaternary Phreatic Qquifer in Yenagoa, Southern Nigeria","authors":"E. Akpofure, K. Okiongbo, Arobo R. C. Amakiri","doi":"10.19026/rjees.11.6025","DOIUrl":"https://doi.org/10.19026/rjees.11.6025","url":null,"abstract":": Hydrochemical investigation of groundwater samples was carried out in Yenagoa, Southern Nigeria in an attempt to determine the suitability of the groundwater quality for domestic use. Twenty four groundwater samples were collected from domestic boreholes in the study area and were analyzed for major ions. The hydrochemical parameters determined were statistically examined and correlated. Factor analysis was applied to extract the principal factors responsible for the variation in the hydrochemistry. Water Quality Index (WQI) rating was calculated to quantify overall suitability of the water for human consumption. The results show that the correlation coefficient matrix between Electrical Conductivity (EC), Na + and Cl - was significant, which is an indication of seawater influence on the groundwater quality. The geochemistry of the groundwater is controlled mainly by rock-water interaction, ion exchange reactions, reductive dissolution of iron bearing minerals and weathering of silicate group of minerals. The WQI of the study area ranged from 5.7-32.7, indicating excellent water quality.","PeriodicalId":355309,"journal":{"name":"Research Journal of Environmental and Earth Sciences","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129930189","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In order to assess the long-term contamination history of pollutants due to intense mining activities in the adjoining areas of rivers of northern Goa, sediment core samples collected from three rivers viz, the Bicholim (BR), the Mandovi (MR) and the Terekhol (TR) were analysed for texture, Organic Carbon (OC), major elements (Fe, Al, Ca and Mg) and trace metals (Mn, Cu, Zn, Pb, Ni and Cr). Depositional environment of the cores was assessed based on the color and the distribution of OC. Environmental parameters such as contamination factor, geo accumulation, enrichment factor and pollution load index were used to assess the extent of pollution. In addition, correlation coefficients were calculated to understand their relationships among the major elements and trace metals and their sources. The study revealed that the Bicholim river is strongly polluted with Fe & Mn and moderately polluted with Pb & Cr. Whereas, the Mandovi river is moderately polluted with Mn & Pb. On the other hand, Terekhol River (though unpolluted in the past) is getting polluted with Cu and Cr during recent years because of human interference. The results indicate that mining has a considerable impact on the Bicholim and Mandovi river sediments which in turn affect the ecology of bottom-dwelling organisms.
{"title":"Impact of Past Iron Ore Mining on the Sediment Cores of Rivers of Goa. West-coast of India","authors":"N. Rane, V. Matta","doi":"10.19026/RJEES.11.5991","DOIUrl":"https://doi.org/10.19026/RJEES.11.5991","url":null,"abstract":"In order to assess the long-term contamination history of pollutants due to intense mining activities in the adjoining areas of rivers of northern Goa, sediment core samples collected from three rivers viz, the Bicholim (BR), the Mandovi (MR) and the Terekhol (TR) were analysed for texture, Organic Carbon (OC), major elements (Fe, Al, Ca and Mg) and trace metals (Mn, Cu, Zn, Pb, Ni and Cr). Depositional environment of the cores was assessed based on the color and the distribution of OC. Environmental parameters such as contamination factor, geo accumulation, enrichment factor and pollution load index were used to assess the extent of pollution. In addition, correlation coefficients were calculated to understand their relationships among the major elements and trace metals and their sources. The study revealed that the Bicholim river is strongly polluted with Fe & Mn and moderately polluted with Pb & Cr. Whereas, the Mandovi river is moderately polluted with Mn & Pb. On the other hand, Terekhol River (though unpolluted in the past) is getting polluted with Cu and Cr during recent years because of human interference. The results indicate that mining has a considerable impact on the Bicholim and Mandovi river sediments which in turn affect the ecology of bottom-dwelling organisms.","PeriodicalId":355309,"journal":{"name":"Research Journal of Environmental and Earth Sciences","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115573348","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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