Disappearance of polycyclic aromatic hydrocarbons sorbed on surfaces of pine [Pinua thunbergii] needles under irradiation of sunlight: Volatilization and photolysis

Wang, Degao; Chen, Jingwen; Xu, Zhixiang; Qiao, Xianliang; Huang, Liping

doi:10.1016/j.atmosenv.2005.04.008

Cited by 99 publications

(51 citation statements)

References 35 publications

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“…The latter were higher than that reported in most other studies, such as that of PAHs adsorbed onto pine needles, where photolytic half-lives were >12 h with 450 W m À2 irradiation by sunlight (Wang et al, 2005). This is to be expected as LIF involves single wavelength irradiation at or close to the analyte's absorption maximum.…”

Section: Photodegradationmentioning

confidence: 54%

Investigations into a novel method for atmospheric polycyclic aromatic hydrocarbon monitoring

Forbes

Rohwer

2009

Environmental Pollution

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A novel method for rapid analysis of atmospheric PAHs by laser induced fluorescence allows for more detailed trend determinations. a r t i c l e i n f o a b s t r a c tA novel analytical method for atmospheric polycyclic aromatic hydrocarbons (PAHs) was developed based on laser induced fluorescence (LIF) of samples on quartz multi-channel polydimethylsiloxane traps. A tunable dye laser with a frequency doubling crystal provided the excitation radiation, and a double monochromator with a photomultiplier tube detected emitted fluorescence. The method allowed for the rapid (<5 min), cost effective analysis of samples. Those yielding interesting results could be further analysed by direct thermal desorption-gas chromatography-mass spectrometry (TD-GC-MS, with limits of detection of w0.3 ng m À3 ), as photodegradation was minimal (<10% over 5 min irradiation). Small amounts of naphthalene photodegradation products identified by TD-GC-MS after >15 min irradiation, included phenol, benzyl alcohol and phthalic anhydride. Without any signal optimization, a LIF detection limit of w1 mg m À3 was established for naphthalene using a diffusion tube (diffusion rate of 2 ng s À1 ) and 292 nm excitation.

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Section: Photodegradationmentioning

confidence: 54%

Investigations into a novel method for atmospheric polycyclic aromatic hydrocarbon monitoring

Forbes

Rohwer

2009

Environmental Pollution

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“…Различные части сосновых деревьев (Pinus densiflora), в том числе кора, хвоя, шишки, а также пыльца, широко употребляется в качестве пищевых продуктов или пищевых добавок для укрепления здоровья [2]. Они показали широкий спектр биоло-гического и фармакологического действия, такие как противовоспалительное, антибактериальное, противовирусное, антидепрессантное, а также спо-собствуют уменьшению триглицеридов в организ-ме.…”

Section: обзор литературыunclassified

Некоторые Химические Компоненты Сосны

Elanidze¹

2016

ХНТ

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Проведено исследование фенольного и липидного состава вторичных ресурсов экологически чистой сосны (Pinus Sylvestris) (sosnowskyi), распространённой на охраняемой территории Тушети (регион северо-восточной части Грузии), в частности, коры, древесных обрезков и смолы. Выявлены различия по содержанию липидной и фенольной фракций исследуемых объектов. Полученные данные указывают на то, что древесные обрезки, кора и смола как вторичные продукты из экологически чистой местности могут быть использованы для комплексной переработки, с целью получения полезных для здоровья природных биологически активных соединений.

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“…The relatively high concentration of HMW PAHs in mosses can be explained by differences in the leaf structure and PAH uptake mechanism of pine needles and mosses [42]. The leaf properties of bio-indicators (e.g., leaf size, surface morphology, waxy cuticle, and lipid compounds) are important for understanding their PAH profiles [3,[33][34][35][36]. Piccardo et al [3] showed that LMW PAHs diffuse and accumulate more readily than HMW PAHs in pine needle tissues either via the stomata or by diffusion through the cuticle, while HMW PAHs remain in the waxy cuticle layer owing to their strong interactions with the constituent of the cuticle layer.…”

Section: Uptake Mechanism Of Pahsmentioning

confidence: 99%

Comparison of Pine Needles and Mosses as Bio-Indicators for Polycyclic Aromatic Hydrocarbons

Oishi¹

2013

JEP

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Polycyclic aromatic hydrocarbons (PAHs) are ubiquitous environmental contaminants known to be hazardous to human health. Pine needles and mosses are useful bio-indicators for assessing PAH pollutions; however, the differences in their PAH uptake mechanisms have not been sufficiently discussed. In this study, the properties of pine needles and mosses as bio-indicators of PAHs were investigated on the basis of differences in their PAH profiles. Five sets each of pine needle and moss samples were collected from circular sampling plots and analyzed for 16 PAHs. A comparison of PAH profiles revealed that the proportion of lower molecular weight PAHs (2 -3 aromatic rings; LMW PAHs) was significantly higher in pine needles (78.5% ± 4.8%) than in mosses (35.4% ± 6.8%). In contrast, the proportion of higher molecular weight PAHs (5 -6 aromatic rings; HMW PAHs) was lower in pine needles (4.3% ± 2.9%) than in mosses (25.1% ± 3.3%). Further, the combination of PAH isomer ratios showed that PAH sources between pine needles and mosses were not the same. These differences were explained by their uptake mechanisms and partly by the absorption of PAHs from soil particles by mosses. These findings indicate that pine needles are useful for assessing airborne LMW PAH pollution, whereas mosses can be integrated indicators for assessing complex HMW PAH pollution of the atmospheric and soil environments. On the basis of these properties, the usefulness of these bio-indicators should also be evaluated according to the objective of the assessment and the areas where they are applied.

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Disappearance of polycyclic aromatic hydrocarbons sorbed on surfaces of pine [Pinua thunbergii] needles under irradiation of sunlight: Volatilization and photolysis

Cited by 99 publications

References 35 publications

Investigations into a novel method for atmospheric polycyclic aromatic hydrocarbon monitoring

Investigations into a novel method for atmospheric polycyclic aromatic hydrocarbon monitoring

Некоторые Химические Компоненты Сосны

Comparison of Pine Needles and Mosses as Bio-Indicators for Polycyclic Aromatic Hydrocarbons

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