Determination of Total Potency Equivalent Concentration (Tpec) of Carcinogenic Polycyclic Aromatic Hydrocarbons (Cpahs) In Soils of Bodo-City

Journal of Applied Sciences and Environmental Management

NWIGOO, J.¹  IWUOHA, G.N.¹  ONOJAKE, M.C.¹ 

关键词: TEQ;    TEF;    PEF;    cPAHs;    BaP;    Bodo;    risk assessment;   

DOI  :  

学科分类：环境科学（综合）

来源: University of Port Harcourt * Department of Pure and Industrial Chemistry

【 摘 要 】

The aim of this paper is to report the determination of Total potency equivalentconcentration (TPEC) of Carcinogenic polycyclic aromatic hydrocarbons (cPAHs) in soilsamples from Bodo area in Ogoniland using the Toxicity Equivalent Factor (TEF) model. GasChromatography GC HP 5870 with FID was used for analysis. Out of the seven cPAHsinvestigated only three were detected. They are Benzo (a) Pyrene (BaP), Dibenzo (a, h)anthracene and Indeno (1, 2, 3-cd) pyrene with soil concentrations of 19.06 mg/kg, 6.67 mg/kgand 29.26 mg/kg respectively. Their correspondingly individual potency equivalentconcentrations in soil (mg/kg) are 19.06, 0.67 and 2.93 respectively. Benzo (k) Fluoranthene,Benzo (a) Anthracene, Benzo (b) Fluoranthene and Chrysene was not detected. The calculatedTEQ or TPEC is 22.66mg/kg and this value by far exceeds the method B cleanup levels of BaPvalue of 0.137mg/kg, it suggests a massively contaminated soil. TPEC is 226.6 times higherthan the method B and CAL-EPA risk-based cleanup value of 0.1mg/kg while Total cPAHs is549.9 times higher than the risk-based cleanup value as indicated. This level of soil toxicitywith respect to BaP indicates that the area should be declared a no-go area for humans andanimals alike. We strongly recommend the application of Dispersion by Chemical ReactionTechnology, should be deployed immediately in this area for total detoxification anddecontamination of the area.

【 授权许可】

Unknown