부산대학교 도서관

Pollution status and hydrogeochemical characterization of surface and groundwater resources in Onne Industrial Layout, and environs Rivers State, Nigeria has been done with the aim of determining concentrations of physical, heavy metals, and organic pollutants in the surface and groundwater resources. Water samples were collected seasonally. Surface water samples were collected from 12 locations. Four hand-dug well samples were also collected. A total of 31 parameters were analyzed. From the results of the physicochemical assessment of the hand-dug well in the dry season showed that the entire parameters analysed were within the required standards except Cl, Cu, Pb, Cd, Cr, Hg, Zn, Fe, BETEX and TPH and Cl, Cu, Pb, Cd, Hg, As, Ni, V, Se, Fe, BETEX and TPH, for dry and wet seasons, respectively. The pollution index (PI) values of hand-dug wells for dry and rainy seasons are within the study area were not at critical. SAR values for the hand-dug well water samples were suitable for irrigation purposes. Geochemical results revealed that the hand-dug well waters are potable and Sodium-Chloride (Na-Cl) dominated with a hydrogeochemical trend of Na+ > Ca2+ > Mg2+  > K+ and Cl− > SO42 > NO3 > HCO3−. The values of the physicochemical results from the surface water of the study are within the required regulatory standard except for Turbidity, Cl, Na, Pb, Cd, Cr, Se, BETEX and TPH; and Turbidity, Cl, Na, Pb, Cd, Cr, V, Se, BETEX and TPH for dry and wet seasons, respectively. The PI values of the surface water sources for dry and wet seasons were not at critical. The geochemical models showed that the water is potable and Na-Cl dominated with a hydrogeochemical trend of Na+ > Ca2+ > Mg2+  > K+and Cl− > SO42 > NO3 > HCO3−. The aquiferous materials in the research area are very permeable and relatively shallow, which accounts for the groundwater pollution shown to follow the flow direction. Regular assessment of the water resources within the study is recommended.