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| Oyewo, E.O.. |
| Laboratory-scale studies on the initial weathering of some oils on water by evaporative loss and dissolution have been carried out. Evaporation rate was dependent on the type of oil and was accelerated by increased temperature, number retarded evaporation rate. The order of evaporation rate was Gas Oil >Diesel Oil > Medium fuel Oil. Dissolution rate, which varied with the type of oil, was retarded by salinity but promoted by increased temperature. With the mono-component oils tested, the cyclic, aromatic and iso-characters increased dissolution rate. The order of dissolution rate for the commercial oils was Gas Oil Diesel Oil > Medium Fuel Oil. |
| Tipo: Report |
Palavras-chave: Oil pollution; Water pollution; Water pollution; Http://aims.fao.org/aos/agrovoc/c_8321. |
| Ano: 1988 |
URL: http://hdl.handle.net/1834/2445 |
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| Ajao, E.A.. |
| Bioassay tests were conducted with wastewater effluents from a textile mili and a detergent packing plant using the hermit crab. Clibinarius africanus. (Aurivillus) as experimental animal. LC50 values were evaluated using static testing procedures for 24, 48 and 96 hour. For the textile effluent, means of 79.0, 50.24 and 51.81 percentage effluent by volume were obtained in respect of crabs in the “medium” weight range (0.3 – 0.7grams) for the test periods. For the “detergent wash”, 95.16, 85.00 and 82.33 percentage effluent by volume represented means of values obtained for “small” size crabs (weight range 0.08–0.24 grams) and 96.0, and 81.50 percentage effluent by volume for ‘medium’ size crabs for 24, 48 and 96 hour respectively. Spearman’s Rank... |
| Tipo: Report |
Palavras-chave: Pollutants; Water pollution; Pollutants; Water pollution; Http://aims.fao.org/aos/agrovoc/c_6076; Http://aims.fao.org/aos/agrovoc/c_8321. |
| Ano: 1985 |
URL: http://hdl.handle.net/1834/2440 |
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| Sadik, O. A.. |
| Trace metal levels were determined in tissues of eleven species of marine fishes of commercial importance and in water and sediments taken from six sites located along the Nigerian Coastal waters. The Study was undertaken to determine the occurrence and the levels of cadmium, nickel, lead, mercury and zinc in fish tissues, water and sediments, and to establish a baseline data to which future studies on the levels of this metals could be referred. The total concentrations of each element in the samples were determined without regard to chemical form. Mean levels of each element are presented to relation to the number of species examined. More detailed analytical data on these elements are given with reference to tissue analysed, size range of fish and... |
| Tipo: Report |
Palavras-chave: Heavy metals; Water pollution; Heavy metals; Water pollution; Http://aims.fao.org/aos/agrovoc/c_2223; Http://aims.fao.org/aos/agrovoc/c_8321. |
| Ano: 1990 |
URL: http://hdl.handle.net/1834/2429 |
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