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Distribution,sources and risk of exposure to polycyclic aromatic hydrocarbons in indoor dusts from electronic repair workshops in southern Nigeria

引用

Emerging Contaminants 2019年第1期5卷 23-30页

作者： Chukwujindu M.A.Iwegbue Grace Obi Stephen A.Uzoekwe Francis E.Egobueze eze W.Odali Godswill O.Tesi Godwin E.Nwajei Bice S.Martincigh Department of Chemistry Delta State UniversityP.M.B.1AbrakaNigeria Department of Chemistry Federal University of Petroleum ResourcesEffurunDelta StateNigeria Department of Chemistry Federal UniversityOtuokeBayelsa StateNigeria Nigerian Agip Oil Company Port HarcourtNigeria Department of Chemistry University of AfricaToru-OruaBayelsa StateNigeria School of Chemistry and Physics University of KwaZulu-NatalPrivate Bag X54001Durban4000South Africa

This study evaluates the characteristic levels,sources and risk of human exposure to polycyclic aromatic hydrocarbons(PAHs)in indoor dusts from electronic repair workshops in southern *** dust samples were collected by gentle sweeping with a brush and dustpan,and subsequently dried and extracted with hexane/dichloromethane by *** extracts were purified on a silica gel/alumina column,and then analysed for their PAH content by means of gas chromatography-mass *** concentrations of PAHs in the electronic repair workshop dusts ranged between 205 and 2963 mg kg*** compositional patterns indicate the dominance of 5-and 3-ring PAH *** estimated benzo[a]pyrene carcinogenic(BaPTEQ)and mutagenic(BaPMEQ)potency concentrations ranged from 67 to 401 mg kg^-1 and 56.5e277 mg kg^-1 *** non-cancer risk(hazard index,hi)arising from human contact with PAHs in the electronic repair workshop dusts were less than one for all human subject age groups indicating that there is no considerable non-cancer *** cancer risk values for the ingestion and dermal contact routes were greater than the acceptable risk of 10^-6,which suggests that there is a considerable cancer risk associated with unconscious ingestion and dermal contact with dust particles from these electronic repair *** isomeric ratios for the PAHs in the dust samples and principal component analysis suggest that combustion of biomass and vehicular emissions were responsible for the presence of PAHs in the electronic repair workshop dusts.

关键词： PAHs Health risks Indoor dust Electronic repair workshops Southern Nigeria

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