Title: ASSESSMENT OF THE VARIATIONS IN PHYSICO-CHEMICAL PARAMETERS AND HEAVY METALS POLLUTION POTENTIALS OF EKERIKANA WATERBODY, RIVERS STATE, NIGERIA
Author(s): Iyama William Azuka, Eugene-Nwala Obinna and Igoni Israel Kitoye
The Nigerian National Petroleum co-operation generates large proportion of effluents waste water from their process plants. This study was to assess the level of pollution from physicochemical parameters and heavy metals point of view on the adjoining Ekerikana water body. This study established six sampling station such as R, S, T, U, V control sample station X. All samples were collected in accordance with the procedure described in water standard method for water and waste analysis. Physico-chemical parameters were determined using Horiba U-10 model and titrimetry. The analysis conducted indicated that physico-chemical water quality parameters recorded mean concentration values of pH (7.06 – 7.67mg/l), DO (1.02 – 3.25mg/l), BOD (34.2-45.4mg/l), temperature (28.1-29.10C), electrical conductivity (4090-23,660 µS/Cm), Turbidity (1.4-26.7NTU), TDS (2863-22,820 mg/l) and THC(<0.20-2.42mg/l). The analysis conducted shows that parameters such as electrical conductivity, biochemical oxygen demand, turbidity temperature, and total dissolved solid were all above permissible limit as specified by world health organization and federal ministry of environment though pH was within the permissible limit. The analysis conducted indicated that heavy metal presence was within levels permissible by regulatory bodies It was established from the result of this study that the refinery discharged effluent has impacted negatively on the Ekerikana water quality which has resulted to loss of biodiversity, agricultural activities and hampered environmental sustainability. There is need to also study the trend in both nutrient and microbiological composition of the Ekerikana water body so as to develop a water quality index for it.
Keywords: water quality, assessment, variation, anthropogenic, contaminant, heavy metals, pollution.