Examining the correlation between quantifiable SVOCs and organic carbon content or particulate size in benthic sediments as a function of ocean stratum

Environmental Science. Processes & Impacts
Ochan Otim

Abstract

The raw analytical concentration values of semi-volatile organic compounds (SVOCs) in ocean sediments do not necessarily reflect the bioavailable fractions of SVOCs in the sediments due to factors such as the total organic carbon content of sediments (TOC) and the percentage of fine particles in sediments (% fines) as they are believed to affect the extraction efficiency of SVOCs from sediments. Corrective actions are therefore taken to minimize their influence on measurements. In doing so, a broad and uniform correlation is assumed to exist between the 'native' levels of SVOCs and TOC or % fines across ocean strata. However, the validity of this blanket assumption is not yet verified. In this study, we examined the strength of the assumption using DDTs, PAHs and PCBs levels in sediments from Santa Monica Bay (SMB), California, USA. (The distribution patterns of these SVOCs in SMB are known and reproducible for quality assurance.) As our results show, a uniform correlation between SVOC levels and TOC or % fines across strata is mostly absent. For example, PAH and PCB levels show negative correlation with TOC or % fines, and only in canyon sediments, DDT levels correlate positively with both TOC and % fines across at least three...Continue Reading

References

Mar 22, 2003·Marine Environmental Research·Kenneth Schiff, Steven Bay
Aug 12, 2006·Trends in Ecology & Evolution·Filip J R MeysmanCarlo H R Heip
May 15, 2007·Chemosphere·Snell A MillsJonathan Barney
May 29, 2012·Environmental Monitoring and Assessment·Darrin GreensteinKen Schiff
Jan 14, 2017·The Science of the Total Environment·Chunyang LiaoJay Gan
Mar 3, 2018·Environmental Monitoring and Assessment·Ochan OtimRobert Savinelli
Mar 5, 2019·Environmental Science & Technology·Veronika KivensonDavid L Valentine

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BETA
size fractionation

Software Mentioned

PAleontological STatistics
PAST
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