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Research On Acute Toxicity Of Spilling Oils To Chlorella Spp. And Artemia

Posted on:2007-01-04Degree:MasterType:Thesis
Country:ChinaCandidate:N LiuFull Text:PDF
GTID:2121360182478078Subject:Environmental Science
Abstract/Summary:PDF Full Text Request
Studying the acute toxicity of oil is the important measure to evaluate oil pollution's damage to marine biology. The paper selects gasoline, No.20 fuel oil, No.O fuel oil, No.O Maritime fuel oil and Maritime heavy fuel oil as oils used in experiment, selects Chlorella spp. , Artemia and Photobacterium phosphoreum T, spp as biology used in experiment. The result proves that five oils have stimulated Chlorella spp. in low concentration, followed as ≤0.5, ≤1.5,≤3.5, ≤44.94,and ≤6.5mg/L. It brings toxicity to Chlorella spp. when the concentration is increased, and the order of five WAF's toxicity is gasoline> No.20 fuel oil> No.O fuel oil> No.O Maritime fuel oil > Maritime heavy fuel oil. The paper also finds that oils badly effects chlorophyll and protein of Chlorella spp., and the rate of phaeophytin is enhanced in studying toxicity mechanism.The experiment to Artemia is controlled in 48h. The toxicity of oils to Artemia at shape, times of swim and lethal. The order of toxicity to Artemia is gasoline> No.20 fuel oil> No.O fuel oil> Maritime heavy fuel oil > No.O Maritime fuel oil. Compare to Artemia, Chlorella spp. is sensitive to oil pollution except to gasoline at 48h. The toxicity of oils to Photobacterium phosphoreum T, spp mostly is effecting the rate of luminescence, the order of toxicity is No.O Maritime fuel oil > Maritime heavy fuel oil.The paper also discusses the toxicity of two oils(No.O Maritime fuel oil and Maritime heavy fuel oil) to marine biology after using dispersant to the two oilso It have been found rising to Chlorella spp. and declining to Artemia and Photobacterium phosphoreum T, spp.The study proves that the acute toxicity of oils to marine biology is increase with the increase of time. When the concentration is steady, there's quadratic equations. Based on it dose-effect and time-effect relationships will be found. This result will do well to evaluate the toxicity degree of oils to marine at different time.
Keywords/Search Tags:Oil Pollution, Dispersant, Acute Toxicity
PDF Full Text Request
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