Degradation Effects of Automotive Gas-Oil Pollution of Oyan-lake, Lagos Lagoon and Sea Waters on Elongation (cm) of Unknotted Artisanal PVA Synthetic Fishing Twine.

This study investigated the effects of automotive gas-oil spillage of Oyan-lake (0.4ppt), Lagos lagoon (25ppt) and Sea (37ppt) waters on elongation (cm) of artisanal PVA synthetic twine of diameters 4mm, 6mm, 8mm and 10mm soaked for four months. Chemical (burning) test was carried out to identify the twine as PVA, among others six locally synthetic twines (Klust, 1973). The elongation (cm) of dry, unpolluted (control) and polluted states of PVA twines were tested with tensile-strength gauge machine (0-200kg capacity). Factorial statistics was used to analyze the treatments, twine (at four levels), water salinity (at three levels) and concentrations (at six levels), replicated in four places (288 treatments). The thicker the PVA twine diameters at lowered (0%, 20%, 40%, 60%, 80% & 100%) automotive gas-oil spillage of fresh, brackish and marine waters respectively, the higher the significant elongation was evaluated. Significant (p<0.05) correlation coefficients r= 0.989 for dry twine 10mm, r=0.933 for unpolluted 10mm twine and lowest r-value of 0.499 was obtained in twine 4mm soaked in 100% gas-oil concentration.