Nonlinearity in the Slopes of Clausius−Clapeyron Plots for SVOCs

Hoff, R. M.; Brice, Kenneth A.; Halsall, Crispin J.

doi:10.1021/es9709740

Cited by 128 publications

(131 citation statements)

References 27 publications

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“…Atmospheric concentrations of semivolatile organic compounds (expressed as their partial pressure) have a strong relationship to ambient temperature. [34] The temperature dependence of these compounds can be quantitatively described by the CC equation, which is expressed as:…”

Section: Air Concentrationsmentioning

confidence: 99%

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Currently used pesticides, hexachlorobenzene and hexachlorocyclohexanes in the air and seawater of the German Bight (North Sea)

et al. 2012

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Environmental context. The occurrence of pesticides in remote areas such as high mountains and the Arctic demands an understanding of their regional environmental fate. We investigate the levels and sources of currently used pesticides and legacy pesticides in the air and seawater of the German Bight. Volatilisation from local surfaces and long-range transport were the major sources of these chemicals to the air, whereas riverine input and atmospheric deposition by air-seawater exchange were the main sources of these chemicals to the seawater.Abstract. Surface seawater and air samples collected from the German Bight (North Sea) in March, May and July 2010 were analysed for hexachlorobenzene (HCB) and hexachlorocyclohexanes (HCHs), five currently used pesticides (CUPs) (trifluralin, endosulfan, chlorpyrifos, dacthal and quintozene) and pentachloroanisole (metabolite). Volatilisation from local surfaces was considered to be the main source of these chemicals to the air (excluding trifluralin). Long-range transport from Western Europe partly contributed to the higher air concentrations observed in July whereas riverine input was the main source for HCHs and pentachloroanisole in seawater in March. Air-sea gas exchange of HCB and a-HCH in the German Bight was found to be near equilibrium, probably reflecting the past use of these chemicals, their wide dispersal in the environment and lack of contemporary use. Deposition of target compounds from the air to seawater was observed to be much higher in July compared with depositional fluxes for March and May, except for chlorpyrifos (with volatilisation fluxes in all sampling periods: ,25 ng m À2 day À1 ). Concentrations of trifluralin in seawater appear to have decreased since its restriction of use in European Union member states, with net volatilisation from seawater observed in March (flux: 6.3 AE 7.2 ng m À2 day À1 ). With the exception of chlorpyrifos, our results indicate that volatilisation from local sources combined with long-range transport from Western Europe and subsequent deposition are important pathways for these compounds to German Bight seawater during summer periods.

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Section: Air Concentrationsmentioning

confidence: 99%

“…versus LRAT can be assessed. [34,35] Details of CC equations and calculated DH ex for every compound are given in Table S10 and CC plots are shown in Fig. 2.…”

Section: Air Concentrationsmentioning

confidence: 99%

Currently used pesticides, hexachlorobenzene and hexachlorocyclohexanes in the air and seawater of the German Bight (North Sea)

et al. 2012

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“…The temperature influence on the gaseous phase behavior of PBDEs was investigated using the ClausiuseClapeyron equation: lnP ¼ m/T þ b, where P is the partial pressure of semivolatile organic compounds in gas phase (atm), T is the ambient temperature (K), and m and b are fitting parameters (Hoff et al, 1998). Since P is related to the air concentration (C), the relationship between lnC and T is discussed.…”

Section: Difference In Pbde Concentrations Among the Sitesmentioning

confidence: 99%

Summer atmospheric polybrominated diphenyl ethers in urban and rural areas of northern China

Wang

Chen

et al. 2012

Environmental Pollution

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“…Soil generally acts as a primary sink and emission source for contaminants (Duarte-Davidson et al, 1997;Rauf et al, 2002). Atmospheric particulates are important factors in the long distance transport of contaminants in the terrestrial ecosystem (Hoff et al, 1998). Although direct exposure to contaminants via inhalation of air is not a significant exposure pathway in humans, respirable particulate matter (PM) represents the vector by which persistent organic pollutants enter the upper respiratory tract.…”

Section: Introductionmentioning

confidence: 99%

Levels and distribution of organochlorine pesticides in various media in a mega-city, China

Cheng

Liu

et al. 2009

Chemosphere

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a b s t r a c tAs one of China's great metropolises, Taiyuan is generally recognized to be one of the most polluted cities in the world. It is affected by pollution from heavy industries, and from organochlorine pesticides (OCPs). In this study, we measured the concentrations of OCPs in various environmental media in Taiyuan. We measured the levels of OCPs in 15 soil samples and 34 samples of respirable particulate matter (PM) (17 of PM 2.5 and 17 of PM 10 ) from urban areas of Taiyuan. Analysis of the composition ratios of OCP residues revealed that dichlorodiphenyltrichloroethane (DDT) and hexachlorocyclohexane (HCH) were the predominant compounds in soil, PM 2.5 and PM 10 . The total DDT concentrations were 1.8-1.0 Â 10 2 ng g À1 in soil, 6.5-1.0 Â 10 3 pg m À3 in PM 2.5 , and 8.5-1.5 Â 10 3 pg m À3 in PM 10 . The total HCH concentrations were 1.4-45 ng g À1 in soil, 5.2-8.0 Â 10 2 pg m À3 in PM 2.5 , and 9.6-8.7 Â 10 2 pg m À3 in PM 10 . Furthermore, source analysis indicated that there was new input of OCPs at some sites. Finally, analysis of the individual OCPs revealed that new OCP contamination was the major problem in Taiyuan. This study suggests that measures should be taken to reduce the levels of OCP residues in order to improve the environmental quality in Taiyuan.

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Nonlinearity in the Slopes of Clausius−Clapeyron Plots for SVOCs

Cited by 128 publications

References 27 publications

Currently used pesticides, hexachlorobenzene and hexachlorocyclohexanes in the air and seawater of the German Bight (North Sea)

Currently used pesticides, hexachlorobenzene and hexachlorocyclohexanes in the air and seawater of the German Bight (North Sea)

Summer atmospheric polybrominated diphenyl ethers in urban and rural areas of northern China

Levels and distribution of organochlorine pesticides in various media in a mega-city, China

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