Seasonal atmospheric deposition variations of polychlorinated biphenyls (PCBs) and comparison of some deposition sampling techniques

Birgül, Aşkın; Taşdemir, Yücel

doi:10.1007/s11356-010-0383-2

Cited by 18 publications

(7 citation statements)

References 51 publications

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“…In recent years, environmental pollutants such as heavy metal have significant adverse biological effects to humans and other living organisms ( Sun et al 2009 ; Bačkor et al 2010 ; Birgül and Tasdemir 2011 ). However, some toxic chemical stressors may have beneficial protective effects at low doses ( Calabrese and Baldwin 2001 ; Calabrese and Baldwin 2003a ; Stebbing 2003 ).…”

Section: Introductionmentioning

confidence: 99%

Hormetic Responses of <i>Lonicera japonica Thunb.</i> to Cadmium Stress

Liu¹,

Chen²,

He³

et al. 2014

Dose-Response

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The hormetic responses of Lonicera japonica Thunb. to cadmium (Cd) stress were investigated in a hydroponic experiment. The present results showed that root length and total biomass dry weight increased in comparison with the control at low concentrations Cd. The height of the plant exposed to 2.5 and 5 mg L-1 Cd increased significantly by 11.9% and 12.8% relative to the control, and with the increase of Cd concentrations in the medium, plant height began to decrease. The responses of photosynthetic pigments contents and relative water content to Cd stress had a similar trend, which all showed significantly an inverted U-shaped dose–response curve and confirmed that the stimulatory effect of low concentrations Cd occurred in the plant. Furthermore, L. japonica, as a new Cd-hyperaccumulator, could be considered as a new plant model to study the underlying mechanisms of the hormesis.

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Section: Introductionmentioning

confidence: 99%

Hormetic Responses of <i>Lonicera japonica Thunb.</i> to Cadmium Stress

Liu¹,

Chen²,

He³

et al. 2014

Dose-Response

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“…The high PCB levels suggested that the occurrence of PCBs was due to local sources and long-range transport. The area of Northwestern Turkey is known as an area with mid to high concentrations of PCBs and many studies have been conducted last years to describe the situation [16–18, 22, 33]. The most abundant individual congeners, in this study, were PCB-85, PCB-52, and PCB-28 with average concentrations of 23.6, 21.3, 20.8 pg/m 3 , respectively.…”

Section: Resultsmentioning

confidence: 68%

“…After rain stopped, the cover opened on top of the dry deposition part and closed on top of the wet deposition part. Details of the WDDS have been previously described elsewhere [17, 18]. Samples were taken for 15-day periods.…”

Section: Methodsmentioning

confidence: 99%

“…There was a leading edge with a width of 20 cm in order to prevent negative effects of turbulence around the BDS [18]. The BDS and WDDS were run simultaneously.…”

Section: Methodsmentioning

confidence: 99%

“…The sampling, extraction, and analysis procedures followed in this study were explained elsewhere and were only summarized here [17, 18]. Briefly, PUF cartridges were soxhlet extracted with a 1 : 4 (v : v) mixture of DCM/PE (petroleum ether) for 24 hours [19].…”

Section: Methodsmentioning

confidence: 99%

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Determination of the Sampler Type and Rainfall Effect on the Deposition Fluxes of the Polychlorinated Biphenyls

Birgül

Taşdemir

2012

The Scientific World Journal

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Atmospheric concentration and deposition samples were collected between June 2008 and June 2009 in an urban sampling site Yavuzselim, Turkey. Eighty-three polychlorinated biphenyl (PCB) congeners were targeted in the collected samples. It was found that 90% of the total PCB concentration was in the gas phase. Deposition samples were collected by a wet-dry deposition sampler (WDDS) and a bulk deposition sampler (BDS). Average total deposition fluxes measured with the BDS in dry periods was 5500 ± 2400 pg/(m2day); average dry deposition fluxes measured by the WDDS in the same period were 6400 ± 3300 pg/(m2day). The results indicated that the sampler type affected the measured flux values. Bulk deposition samples were also collected in rainy periods by using the BDS and the average flux value was 8700 ± 3100 pg/(m2day). The measured flux values were lower than the values reported for the urban and industrial areas. Dry deposition velocities for the WDDS and BDS samples were calculated 0.48 ± 0.35 cm/s and 0.13 ± 0.15 cm/s, respectively.

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Concentrations, Gas-Particle Partitioning, and Seasonal Variations of Polycyclic Aromatic Hydrocarbons at Four Sites in Turkey

Birgül

Taşdemir

2014

Arch Environ Contam Toxicol

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Ambient air polycyclic aromatic hydrocarbon (PAH) samples were collected at traffic, residential, coastal, and semiurban sites in Bursa, Turkey, between June 2008 and June 2009. For the traffic, residential, coastal, and semiurban sites, the average gas phase total PAH (∑12PAH) concentrations were 113 ± 131, 142 ± 204, 53 ± 73, and 19 ± 34 ng/m(3), respectively, whereas the average particle phase total PAH concentrations were 28 ± 36, 56 ± 85, 24 ± 40, and 11 ± 23 ng/m(3), respectively. Phenanthrene and fluoranthene had the highest concentrations of all of the sampling sites in the gas phase. The PAH concentrations in the heating period were 5-7 times greater than the nonheating period concentrations. Principal component analysis (PCA) was used to investigate the relationship between the levels of PAHs determined in ambient samples and their possible sources. The PCA model shows that coal combustion and vehicle emissions affected PAH emissions. Moreover, the molecular diagnostic ratios indicated that coal-burning and traffic emissions were the dominant PAH sources. The multiple linear regression analysis indicated that the meteorological parameters also affected the ambient PAH concentrations. The sampling site characteristics, meteorological conditions, dispersion, and local sources all affected the concentration levels.

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Seasonal atmospheric deposition variations of polychlorinated biphenyls (PCBs) and comparison of some deposition sampling techniques

Cited by 18 publications

References 51 publications

Hormetic Responses of <i>Lonicera japonica Thunb.</i> to Cadmium Stress

Hormetic Responses of <i>Lonicera japonica Thunb.</i> to Cadmium Stress

Determination of the Sampler Type and Rainfall Effect on the Deposition Fluxes of the Polychlorinated Biphenyls

Concentrations, Gas-Particle Partitioning, and Seasonal Variations of Polycyclic Aromatic Hydrocarbons at Four Sites in Turkey

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