Christopher Ogorchukwu OGBUE2024-05-222024-05-222022-12Kate TurabianM.Schttps://repository.lcu.edu.ng/handle/123456789/287This study is aimed to assess heavy metals and PAHs in soil from tyre pyrolysis plant Egbeda, Ibadan Oyo State. Soil samples were collected from seven strategic locations around the plant. Five selected heavy metals name As, Cd, Cr, Pb and Zn were determined using Atomic Absorption Spectrophotometer (AAS). PAHs were extracted from soil samples through an accelerated solvent extraction system (ASE 200, Dionex, Sunny-vale, CA, USA) with a 1:1 (v/v) acetone/dichloromethane solvent mixture. The results of heavy metals showed that the average concentration of the five metals are As-0.2827 mg/kg, Cd-0.2177 mg/kg, Cr-0.1726 mg/kg, Pb-0.6753 mg/kg and Zn-1.0232 mg/kg and in decreasing order of abundance ranked Zn > Pb > As > Cd > Cr. One way ANOVA reveals that all the results were significantly different from one another (P<0.05), similarly there was no correlation between all the five metals examined. The degree of contamination and the pollution index of the study site are 13.8 and 2.2 respectively and they implied that the site is moderately contaminated.The PAHs result showed that a total of 18 PAHs were determined with average concentration ranking of Naphthalene -381.25 mg/Kg, 1-Methyl Naphthalene -335.50 mg/Kg, 2-Methyl Naphthalene -236.25 mg/Kg, Anthracene -199.75 mg/Kg, Fluoranthene -173.65 mg/Kg, Phenanthrene -140.00 mg/Kg, Pyrene -78.78 mg/Kg, Chrysene -72.20 mg/Kg, Benzo(a)anthracene -48.78 mg/Kg, Benzo(a)pyrene -45.72 mg/Kg, Acenaphthene -36.68 mg/Kg, Indeno(1,2,3-cd)pyrene -31.26 mg/Kg, Benzo(b)fluoranthene -30.35 mg/Kg, Benzo(k)fluoranthene -27.54 mg/Kg, Fluorene -21.93 mg/Kg, Benzo(g,h,i)perylene -18.51 mg/Kg, Dibenz(a,h)anthracene -15.22 mg/Kg, and Acenaphthylene -12.98 mg/Kg. Seven major carcinogenic and tetratogenic PAHs were detected in slightly elevated levels. One way ANOVA reveals that the concentration of all the PAHs identified were significantly different from one another, although correlation study indicated that there is strong positive correlation between all the PAHs. Keywords: Pyrolysis, Scrap tyre, PAHs, Heavy metals, Environment, Concentration. Word Count: 285enThesis