Abstract:
Samples of surf zone beach sand were collected to track the occurrence and degradation of polycyclic aromatic hydrocarbons on beaches of the West Florida Panhandle. Composite samples were air dried and extracted by standard procedures for analysis of naphthalene, phenanthrene, and chrysene and their 1-3 alkylated forms by GC/MS SIM. Levels were higher after beach oiling, and rapidly decreased to background levels.
Suggested Citation:
Snyder, Richard A.. 2014. Napthalenes, Phenanthrenes, and Chrysenes in Northwest Florida Beach Sand, Santa Rosa and Escambia Counties in Florida, 5-3-2010 to 9-12-2011.. Distributed by: GRIIDC, Harte Research Institute, Texas A&M University–Corpus Christi. doi:10.7266/N7WS8R67
Purpose:
Monitoring concentrations of PAHs that are characteristic of crude petroleum via detection of naphthalene, phenanthrene, and chrysene and also alkylated naphthalenes, phenanthrenes, and chrysenes in the intertidal sands and backshore sands at beaches in Santa Rosa and Escambia Counties in Florida following the BP MC 252 well failure.
Data Parameters and Units:
1Metadata_and_PAHsBeachSandTableF.xlsx-- IdentSh: Metadata Identifier Sheet for Naphthalenes, Phenanthrenes, and Chrysenes in Northwest Florida Beach Sand, Purpose, Dates, Location, Latitude, Longitude (decimal degrees), Methods, List of Abbreviations, Responsible Party. [O1SF Fort Pickens, 01BKS Fort Pickens, 02SF Pensacola Pier, 02BKKS Pensacola, 03SF UWF Property, 038KS UWF Property, 04SF Navarre Pier, 04BKS Navarre Pier, 05SF River Road, 05BKS River Road, 06SF Johnson Beach]: Site, Date (MM/DD/YY), sample ID, Sand Location (Intertidal, BackShore), [Naph CO, Naph C1, Naph C2, Naph C3, Tot Naph, Ph CO, Ph C1, Ph C2, Ph C3, Tot Ph, Ch CO, Ch C1, Ch C2, Ch C3, Tot Chry, Total PAH] (ug/kg). Alkanes- Alaknes are chemical compounds that consist only of hydrogen and carbon atoms Date- The date that the sample was taken Intertidal- Intertidal samples were taken between the high tide mark down to where sand was being washed by waves Media- Material sampled rpl- Indicates replicate sample Sample ID- Unique number given to each sample includes month, day year, and location Sand location- Beach zone where the sample was taken Site- Location of sample’s origin Site ID- Unique number given to each site Naph C0- ug naphthalene/kg Naph C1- ug methylnaphthalenes/kg Naph C2- ug dimethylnaphthalenes/kg Naph C3- ug trimethylnaphthalenes/kg Tot Naph- ug sum of C+ C1+C2+C3 naphthalenes/kg Ph C0- ug phenanthrene/kg Ph C1- ug methylphenanthrenes/kg Ph C2- ug dimethylphenanthrenes/kg Ph C3- ug trimethylphenanthrenes/kg Tot Ph- ug Sum of C0+C1+C2+C3 phenanthrenes/kg Ch C0- ug chrysene/kg Ch C1- ug methylchrysenes/kg Ch C2- ug dimethylchrysenes/kg Ch C3- ug trimethylchrysenes/kg Tot Chry- ug Sum of C0+ C1+C2+C3 chrysenes/kg Total PAH- ug Sum of all detected naphthalenes, phenanthrenes, and chrysenes/kg
Methods:
Collection: A Chain of Custody Sheet was filled out for samples. Sand samples were composite samples 1.5-3.0 cm in depth from the surface taken in two areas of the beach and put on ice then stored frozen in the lab. Intertidal samples were taken between the high tide mark to where sand downslope was intermittently exposed by retreating waves. Backshore sand samples were taken from just at the end of the high tide mark for a distance of 5 meters shoreward. Extraction: Prior to extraction the sand was dried overnight in a laboratory hood at room temperature and then extracted. The dried sand received 1 gram of sodium sulfate per 10 grams of dried sand prior to extraction. Extractions were done by extracting the dried sample with dichloromethane and then dried down at 38 C to 1ml of volume for analysis. GC-FID Analysis: PAHs were analyzed by GC-MS (Gas Chromatography-Mass Spectrometry) using deuterated internal standards of naphthalene, phenanthrene, and chrysene for quantification.
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