Chemical Quality of Depositional Sediments and Associated Soils in New Orleans and the Louisiana Peninsula Following Hurricane Katrina
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- 作者：Craig Adams ; Emitt C. Witt ; Jianmin Wang ; David K. Shaver ; David Summers ; Youssef Filali-Meknassi ; Honglan Shi ; Ronaldo Luna ; Neil Anderson
- 刊名：Environmental Science & Technology
- 出版年：2007
- 出版时间：May 15, 2007
- 年：2007
- 卷：41
- 期：10
- 页码：3437 - 3443
- 全文大小：1213K
- 年卷期：v.41,no.10(May 15, 2007)
- ISSN：1520-5851
文摘
Hurricane Katrina made landfall on the Louisiana peninsulasouth of New Orleans on Aug 29, 2005. The resultingstorm surge caused numerous levy breaches in the parishesof New Orleans as well as on the Louisiana peninsula.This study was conducted to determine the concentrationsof inorganic and organic constituents in sediments andassociated soils in New Orleans parishes and the Louisianapeninsula after the floodwaters had been removed and/or receded following Hurricane Katrina. A total of 46 sedimentand soil samples were analyzed that were collectedthroughout New Orleans and the Louisiana peninsula.Approximately 20% of the sediment samples were analyzed,including shallow sediment samples from locations thatincluded the top and beneath automobiles, in residential andcommercial areas, and near refineries. Gasoline constituents,pesticides, and leachable heavy metals were analyzedusing headspace gas chromatography/mass spectrometry(GC/MS), organic extraction GC/MS, and inductivelycoupled plasma/mass spectrometry, respectively. A significantnumber of samples had leachable As and Pb concentrationsin excess of drinking water standards. The remainingmetals analyzed (i.e., Cd, Cr, Cu, Hg, and V) generally hadmuch lower leachable levels. Of the gasoline constituents,only benzene was observed above the limit of detection (of5 
g/kg), with no samples observed as being above themethod detection limits of 10 g/kg. For the 18 pesticidesanalyzed, most were in the nondetectable range and allwere in trace amounts that were orders of magnitudebelow regulatory guidelines.
g/kg), with no samples observed as being above themethod detection limits of 10 g/kg. For the 18 pesticidesanalyzed, most were in the nondetectable range and allwere in trace amounts that were orders of magnitudebelow regulatory guidelines.