5/22/2023 0 Comments Factsage download![]() ![]() Pb species exists predominantly in the forms: Pb 6(OH) 8 4+ (aq) (45%), Pb 4(OH) 4 4+ (aq) (45%). Mean concentration of Pb and Ni across the creek were 0.92 ± 0.27 mg/l and 0.46 ± 0.23 mg/l respectively. The trend of temperature values was recorded as: station 1 > station 2 = station 3 = station 4 > station 5 with the mean value deduced to be 25.6 ± 0.4. Surface water pH was close to neutral, and in line with: station 4 > station 2 > station 5 > station 1 > station 3 with 6.81 ± 0.13 as the mean value of pH. Along the creek, surface water Eh is in the order: station 2 > station 4 > station 5 > station 3 = station 1, with mean value of Eh as 140 ± 20 mV. Along the 3 km stretch (stations 1 to 5) of Woji creek, in-situ records were taken for temperature, pH and electrode potential (Eh) surface water samples to be assessed for Pb and Ni were collected in sterile bottles. The present study is designed to use FactSage version 7.3 to simulate and predict the ionic speciation of lead (Pb) and nickel (Ni) in surface water sampled from Woji creek in Rivers State, Nigeria.
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