Graduate Thesis Or Dissertation

 

The effect of selected insecticides upon biochemical oxidation Public Deposited

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  • A study to determine the effect of certain synthetic organic insecticides on the Biochemical Oxygen Demand (BOD) Test was performed. BOD tests on a standard glucose-glutamic acid substrate were conducted while in the presence of dieldrin, dichlorodiphenyltrichloroethane (DDT), or diazinon. From the BOD data, the following parameters were obtained: 1. Oxidation rate constant 2. Ultimate carbonaceous demand 3. Lag period 4. Onset of nitrification. The following conclusions were reached concerning the effects of the insecticides on these parameters: 1. Dieldrin, DDT and diazinon decreased the oxidation rate. 2. Dieldrin increased the ultimate carbonaceous demand. 3. DDT and diazinon had a negligible effect on the ultimate carbonaceous demand. 4. Dieldrin and diazinon increased the lag period and retarded the onset of nitrification, 5. DDT, in the concentrations tested, had no effect on either the lag period or the onset of nitrification.
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  • File scanned at 300 ppi using Capture Perfect 3.0 on a Canon DR-9050C in PDF format. CVista PdfCompressor 5.0 was used for pdf compression and textual OCR.
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