Effects of diesel-oil spillage of fresh, brackish and marine waters on polyvinyl-alcohol (PVA) synthetic fishing twine
The effects of diesel-oil spillage of fresh (0.4ppt), brackish (25ppt) and marine (37ppt) waters on elongation (cm) and breaking load (kgf) of artisanal PVA synthetic twine of varied diameter (4mm, 6mm, 8mm and 10mm) soaked for 16 weeks was studied. Chemical (solubility) test was carried out to identify the experimental twine as PVA among other synthetic twines. The elongation (cm) and breaking load (kgt) of PVA twine diameters were tested by tensile-strength gauge machine (0-200kg) and was carried out in unpolluted (control) and polluted states (spillage level) at 0%, 20%, 40%, 60%, 80% and 100% diesel-oil concentrations of different water salinity. Factorial statistics was used to analyze the treatments; twine (at four levels), water salinity (at three levels) and concentrations (at six levels). This implies 4 by 3 by 6, replicated in four places (288 treatments). Results indicated that elongation (cm) and breaking load (kg) of the specimens were significantly (P<0.05) influenced by twine thickness. Twine l0mm soaked in 3.0 litres of unpolluted freshwater had significant (p<0.5) correlation coefficient r,0.927 and lowest r- value of 0.499 was obtained in twine 4mm soaked in 100% diesel-oil concentration. Significant (P <0.05) relationships were observed between the correlation coefficient r = 0.531-0.927 for unpolluted and r = 0.499-0.592 for polluted tests. The study revealed that diesel-oil spillage had negative effects on the quality of twines. The thicker the PVA twine diameters (10, 8, 6 and 4mm) at lowered (0%, 20%, 40%,60%,80% & 100%) diesel-oil spillage of fresh (0.4ppt), Brackish (25ppt) and Marine (37ppt) waters respectively, the higher the significant (P<0.05) elongation (cm) and breaking load (kgt) were evaluated in most cases.
| Main Authors: | , , , , |
|---|---|
| Format: | conference_item biblioteca |
| Language: | English |
| Published: |
FISON
2012
|
| Subjects: | Conservation, Fisheries, Nigeria, Ogun State, Diesel-Oil, PVA synthetic fishing twine, Freshwater, Brackishwater, Marine water, brackishwater environment, freshwater environment, marine environment, Fuels, Crude oil, Synthetic fibres, Yarns, Saline water, Fresh water, Brackish water, Netting materials, Gear research, Tensile strength, Materials testing, Comparative studies, |
| Online Access: | http://hdl.handle.net/1834/38874 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|