Historical contamination of PAHs, PCBs, DDTs, and heavy metals in Mississippi River Delta, Galveston Bay and Tampa Bay sediment cores

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dc.acquisition-srcDownloaded from-Web of Scienceen_US
dc.call-noen_US
dc.contract-noen_US
dc.contributor.authorSantschi PHen_US
dc.contributor.authorPresley BJen_US
dc.contributor.authorWade TLen_US
dc.contributor.authorGarcia-Romero Ben_US
dc.contributor.authorBaskaran Men_US
dc.contributor.otherMarine Environmental Researchen_US
dc.date.accessioned2010-02-15T17:17:05Z
dc.date.available2010-02-15T17:17:05Z
dc.date.issued2001 Julen_US
dc.degreeen_US
dc.description51-79en_US
dc.description-otheren_US
dc.description.abstractProfiles of trace contaminant concentrations in sediment columns can be a natural archive from which pollutant inputs into coastal areas can be reconstructed. Reconstruction of historical inputs of anthropogenic chemicals is important for improving management strategies and evaluating the success of recent pollution controls measures. Here we report a reconstruction of historical contamination into three coastal sites along the US Gulf Coast: Mississippi River Delta, Galveston Bay and Tamps Bay. Within the watersheds of these areas are extensive agricultural lands as well as more than 50% of the chemical and refinery capacity of the USA. Despite this pollution potential, relatively low concentrations of trace metals and trace organic contaminants were found in one core from each of the three sites. Concentrations and fluxes of most trace metals found in surface sediments at these three sites, when normalized to Al, are typical for uncontaminated Gulf Coast sediments. Hydrophobic trace organic contaminants that are anthropogenic (polycyclic aromatic hydrocarbons, DDTs, and polychlorinated biphenyls) are found in sediments from all locations. The presence in surface sediments from the Mississippi River Delta of low level trace contaminants such as DDTs, which were banned in the early 1970's, indicate that they are still washed out from cultivated soils. It appears that the DDTs profile in that sediment core was produced by a combination of erosion processes of riverine and other sedimentary deposits during floods. Most of the pollutant profiles indicate that present-day conditions have improved from the more contaminated conditions in the 1950-1970's, before the advent of the Clean Water Act. (C) 2001 Elsevier Science Ltd. All rights reserveden_US
dc.description.urihttp://gbic.tamug.edu/request.htmen_US
dc.historyen_US
dc.identifier.urihttp://hdl.handle.net/1969.3/23441
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dc.locationen_US
dc.longitudeen_US
dc.notesTimes Cited: 7ArticleEnglishSantschi, P. HTexas A&M Univ, Lab Oceanog & Environm Res, Dept Oceanog, Galveston, TX 77551 USACited References Count: 65436EZTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLANDOXFORDen_US
dc.placeen_US
dc.publisheren_US
dc.relation.ispartofseries51087.00en_US
dc.relation.urien_US
dc.scaleen_US
dc.seriesen_US
dc.subjectPAHsen_US
dc.subjectPCBsen_US
dc.subjectDDTsen_US
dc.subjectmetalsen_US
dc.subjectsedimentsen_US
dc.subject(210)pben_US
dc.subjectPu-239,Pu-240en_US
dc.subjectMississippi River Deltaen_US
dc.subjectGALVESTON BAYen_US
dc.subjectTampa Bayen_US
dc.subjectGULF-OF-MEXICOen_US
dc.subjectSABINE-NECHES ESTUARYen_US
dc.subjectPHASE SPECIATIONen_US
dc.subjectTEXAS ESTUARIESen_US
dc.subjectCOLLOIDAL FORMSen_US
dc.subjectTRACE-METALSen_US
dc.subjectLAKEen_US
dc.subjectENVIRONMENTSen_US
dc.subjectTRANSPORTen_US
dc.subjectPOLLUTIONen_US
dc.titleHistorical contamination of PAHs, PCBs, DDTs, and heavy metals in Mississippi River Delta, Galveston Bay and Tampa Bay sediment coresen_US
dc.typeJournalen_US
dc.universityen_US
dc.vol-issue52(1)en_US

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