DOI: 10.1016/j.marpolbul.2016.04.002
Scopus记录号: 2-s2.0-84963684573
论文题名: 234Th as a tracer of vertical transport of polycyclic aromatic hydrocarbons in the northern Gulf of Mexico
作者: Adhikari P.L. ; Maiti K. ; Bosu S. ; Jones P.R.
刊名: Marine Pollution Bulletin
ISSN: 0025-326X
EISSN: 1879-3363
出版年: 2016
卷: 107, 期: 1 起始页码: 179
结束页码: 187
语种: 英语
英文关键词: 238U-234Th disequilibria
; Gulf of Mexico
; Particulate PAH fluxes
; Polycyclic aromatic hydrocarbons (PAHs)
; Sediment traps
; Vertical transport fluxes
Scopus关键词: Aromatic compounds
; Aromatic hydrocarbons
; Aromatization
; Hydrocarbons
; Sediment traps
; Sediments
; <sup>238</sup>U-<sup>234</sup>Th disequilibria
; Gulf of Mexico
; Particulate PAH
; Polycyclic aromatic hydrocarbons (PAHS)
; Vertical transports
; Polycyclic aromatic hydrocarbons
; polycyclic aromatic hydrocarbon
; thorium
; water pollutant
; polycyclic aromatic hydrocarbon
; thorium
; thorium 234
; unclassified drug
; uranium 238
; analysis
; chemical model
; environmental monitoring
; Gulf of Mexico
; Mexico
; procedures
; sea
; sediment
; water pollutant
; alkylation
; Article
; atmospheric deposition
; carbon source
; combustion
; comparative study
; concentration (parameters)
; environmental impact
; environmental radioactivity
; geographic distribution
; marine environment
; oil spill
; particulate matter
; reliability
; transport kinetics
; Environmental Monitoring
; Geologic Sediments
; Gulf of Mexico
; Mexico
; Models, Chemical
; Oceans and Seas
; Polycyclic Aromatic Hydrocarbons
; Thorium
; Water Pollutants, Chemical
; marine pollution
; PAH
; pollutant transport
; sediment pollution
; sediment trap
; steady-state equilibrium
; tracer
; Atlantic Ocean
; Gulf of Mexico
Scopus学科分类: Agricultural and Biological Sciences: Aquatic Science
; Earth and Planetary Sciences: Oceanography
; Environmental Science: Pollution
英文摘要: Particle-mediated vertical flux of polycyclic aromatic hydrocarbons (PAHs) plays an important role in their removal from upper oceans and sets a limit on the amount delivered to the deep-sea sediments. In this study, we applied a one-dimensional steady-state 234Th scavenging model to estimate vertical flux of PAHs in the northern Gulf of Mexico and compared them with sediment trap based flux estimates. The 234Th-based Σ PAH43 fluxes were 6.7 ± 1.0 μg m- 2 d- 1 and 3.7 ± 0.6 μg m- 2 d- 1 while sediment trap-based fluxes were 4.0 ± 0.6 μg m- 2 d- 1 and 4.5 ± 0.7 μg m- 2 d- 1 at 150 m and 250 m, respectively. Alkylated homologues contributed to 80% of the total PAH fluxes which is in contrary to other regions where combustion derived parent PAHs dominate the fluxes. The results indicate that the 238U-234Th disequilibria can be an effective tracer of particulate PAH fluxes in upper mesopelagic zones and can provide flux estimates with high spatial coverage needed to quantify their long term fate and transport in the marine systems. © 2016 Elsevier Ltd. All rights reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/87047
Appears in Collections: 过去全球变化的重建 全球变化的国际研究计划
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作者单位: Department of Oceanography and Coastal Sciences, Louisiana State University, 1143 ECE Building, Baton Rouge, LA, United States; Department of Environmental Sciences, Louisiana State University, 1257 ECE Building, Baton Rouge, LA, United States
Recommended Citation:
Adhikari P.L.,Maiti K.,Bosu S.,et al. 234Th as a tracer of vertical transport of polycyclic aromatic hydrocarbons in the northern Gulf of Mexico[J]. Marine Pollution Bulletin,2016-01-01,107(1)