title: Surveillance and source diagnostic investigation of hydrocarbon residues in sediments.
abstract: The nature and seasonal distribution of hydrocarbons were studied in Ondo coastal region in Western Nigeria. The petroleum hydrocarbons were screened by gas chromatography with flame ionization detector (GC/FID) and gas chromatography-mass spectrometry (GC-MS). Complex series of compounds were identified. The overall molecular compositions obtained were characteristic of petrogenic origin with very little biogenic input. The concentrations of two important polycyclic aromatic hydrocarbons (PAHs); phenanthrene and anthracene exceeded the threshold level where adverse effects on biota would occasionally occur; a conclusion suggested to be clarified by site-specific studies on resident organisms. The study is useful for ecological risk assessment in the context of contaminant input, nature, pattern and trend.
authors.affiliation: Department of Chemistry and Industrial Chemistry, Adekunle Ajasin University, Akungba-Akoko, Ondo-State, Nigeria. olisa200@yahoo.com
authors.forename: Isaac A
authors.initials: IA
authors.lastname: Ololade
authors.forename: Labunmi
authors.initials: L
authors.lastname: Lajide
mesh_terms: D000873:Anthracenes / Q000032:analysis; D004784:Environmental Monitoring / Q000379:methods*; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods; D019015:Geologic Sediments / Q000737:chemistry*; D006838:Hydrocarbons / Q000032:analysis*; D010578:Petroleum / Q000032:analysis*; D010616:Phenanthrenes / Q000032:analysis; D012989:Soil Pollutants / Q000032:analysis*
chemical_list: D000873:Anthracenes; D006838:Hydrocarbons; D010578:Petroleum; D010616:Phenanthrenes; D012989:Soil Pollutants; C031181:phenanthrene; C034020:anthracene