Spatial distribution and concentration assessment of total petroleum hydrocarbons in the intertidal zone surface sediment of Todos os Santos Bay, Brazil

被引：19
作者：
Silva, Carine S. [1 ]
Moreira, Icaro T. A. [1 ]
de Oliveira, Olivia M. C. [1 ,2 ]
Queiroz, Antonio F. S. [1 ]
Garcia, Karina S. [1 ]
Falcao, Brunno A. [1 ]
Escobar, Narayana F. C. [1 ]
Rios, Mariana Cruz [1 ]
机构：
[1] Univ Fed Bahia, Inst Geociencias, Nucleo Estudos Ambientais, BR-40170290 Salvador, BA, Brazil
[2] Univ Fed Bahia, Dept Geofis, Inst Geociencias, BR-40170290 Salvador, BA, Brazil
来源：
ENVIRONMENTAL MONITORING AND ASSESSMENT | 2014年 / 186卷 / 02期
关键词：
Sediment; Intertidal; TPHs; Todos os Santos Bay; Contamination; POLYCYCLIC AROMATIC-HYDROCARBONS; KAOHSIUNG HARBOR; ORGANIC-MATTER; GEOCHEMICAL MARKERS; CONTINENTAL-SHELF; COASTAL AREA; ORIGIN; PAHS; PHYTOREMEDIATION; NITROGEN;
D O I：
10.1007/s10661-013-3456-0
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
The primary objective of this study was to investigate the concentrations and spatial distribution of the total petroleum hydrocarbons (TPHs) in the intertidal zone surface sediment of Todos os Santos Bay, Brazil, to assess the distribution and degree of contamination by TPHs, measure the level of TPH degradation in the surface sediment, and identify the organic matter sources. The surface sediment used in this study was collected in 50 stations, and TPHs, isoprenoid alkanes (pristane and phytane), and unresolved complex mixture (UCM) were analyzed by gas chromatography with a flame ionization detector. The total concentrations ranged from 0.22 to 40,101 mu g g(-1) dry weight and showed a strong correlation with the total organic carbon (TOC) content. The highest TPH concentrations were observed in samples from the mangrove sediments of a river located near a petroleum refinery. Compared with other studies in the world, the TPH concentrations in the intertidal surface sediment of Todos os Santos Bay were below average in certain stations and above average in others. An analysis of the magnitude of UCM (0.11 to 17,323 mu g g(-1) dry weight) and the ratios nC17/Pr and nC18/Ph suggest that an advanced state of oil weathering, which indicates previous contamination. The molar C/N ratios varied between 5 and 43, which indicate organic matter with a mixed origin comprising marine and continental contributions.
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收藏
页码：1271 / 1280
页数：10
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