Distribution and characteristics of PAHs in sediments from the Mediterranean coastal environment of Egypt

Barakat, Assem O.; Mostafa, Alaa R.; Wade, Terry L.; Sweet, Stephen T.; Sayed, Nadia B. El

doi:10.1016/j.marpolbul.2011.06.024

Cited by 147 publications

(49 citation statements)

References 43 publications

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“…Similarly, IP/(IP þ Bghi) ratio <0.2 indicates a petroleum origin, 0.2e0.5 indicates a mixed source and >0.5 indicates a biomass/coal combustion source. In addition, the ratio MPhe/Phe defined as the ratio of the sum of all the detected methylated phenanthrenes (3M-Pheþ2M-Pheþ9M-Pheþ1M-Phe) to phenanthrene was also used to complement the source identification (Barakat et al, 2011). LMW-PAHs were the contaminants at five stations (Fig.…”

Section: Source Apportionmentmentioning

confidence: 99%

Distribution of persistent organic pollutants (PAHs, Me-PAHs, PCBs) in dissolved, particulate and sedimentary phases in freshwater systems

Rabodonirina

Net

Ouddane

et al. 2015

Environmental Pollution

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Section: Source Apportionmentmentioning

confidence: 99%

Distribution of persistent organic pollutants (PAHs, Me-PAHs, PCBs) in dissolved, particulate and sedimentary phases in freshwater systems

Rabodonirina

Net

Ouddane

et al. 2015

Environmental Pollution

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“…PAHs with three or more rings have low solubility in water and low vapor pressure; these PAHs can be widely dispersed by atmospheric transport or through stream pathways, and they eventually accumulate in aquatic sediments once produced (Kolarova et al, 2005;Jiang et al, 2007). When released into aquatic environments, the PAHs bind to particles easily and are subsequently deposited in sediments because of their high hydrophobicity and weak degradation (Barakat et al, 2011). Thus, sediment often constitutes a pollutant trap and has proven to be an effective monitoring object for identifying environmental impacts .…”

Section: Introductionmentioning

confidence: 99%

Source apportionment of PAHs in surface sediments using positive matrix factorization combined with GIS for the estuarine area of the Yangtze River, China

Liu

Wang

et al. 2015

Chemosphere

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“…They consist of fused aromatic rings without any heteroatoms or substitutions and comprise a group of over 100 different chemicals [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Applications of inorganic–organic mesoporous materials constructed by self-assembly processes for removal of benzo[k]fluoranthene and benzo[b]fluoranthene

Costa

Garcia

Santos

et al. 2015

J Sol-Gel Sci Technol

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The mesoporous materials MCM-41 and the functionalized inorganic-organic material p-aminobenzoic acid-MCM-41 (PABA-MCM-41) were used as adsorbents to remove the PAHs benzo[k]fluoranthene and benzo[b]fluoranthene from aqueous media. Both MCM-41 and PABA-MCM-41 exhibited the hexagonal mesostructures typical of the M41S family, as confirmed by SAXS, with type IV isotherms and type H1 hysteresis. The materials showed uniform mesopore size distributions, high surface areas, and thermal stability. Adsorption tests showed that for both mesoporous materials, the quantity adsorbed (q e ) increased for higher initial PAH concentrations, and adsorption equilibrium was reached in around 90 min. The experimental kinetic data were fitted using the pseudosecond-order model, and the adsorption process could be described by the Langmuir isotherm. At higher temperatures, there were increases in the initial rates of adsorption and the kinetic constants for adsorption of the PAHs by PABA-MCM-41. The thermodynamic parameters indicated that the process was spontaneous, endothermic, and with a tendency toward disorder of the system at the adsorbent/adsorbate interface. The functionalization of MCM-41 increased the efficiency of adsorption of the PAHs by 44.5 and 32.0 % for benzo[k]fluoranthene and benzo[b]fluoranthene, respectively. Graphical Abstract Effect of contact time on adsorption of (a) B[k]F and (b) B[b]F by PABA-MCM-41. Conditions: 0.05 g of PABA-MCM-41, 5 mL of each PAH solution (concentration 200 lg L -1 ), temperature of 25°C, contact time of 300 min, and agitation at 150 rpm. 0 5 0 1 0 0 1 5 0 2 0 0 2 5 0 3 0 0 22.2 22.3 22.4 22.5 26.5 PAH (a) Benzo[k]fluoranthene (b) Benzo[b]fluoranthene Time (min) q e (µg g -1 )

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Distribution and characteristics of PAHs in sediments from the Mediterranean coastal environment of Egypt

Cited by 147 publications

References 43 publications

Distribution of persistent organic pollutants (PAHs, Me-PAHs, PCBs) in dissolved, particulate and sedimentary phases in freshwater systems

Distribution of persistent organic pollutants (PAHs, Me-PAHs, PCBs) in dissolved, particulate and sedimentary phases in freshwater systems

Source apportionment of PAHs in surface sediments using positive matrix factorization combined with GIS for the estuarine area of the Yangtze River, China

Applications of inorganic–organic mesoporous materials constructed by self-assembly processes for removal of benzo[k]fluoranthene and benzo[b]fluoranthene

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