Annual cycle of polychlorinated biphenyls and organohalogen pesticides in air in southern Ontario. 1. Air concentration data

Hoff, R. M.; Muir, Derek C. G.; Grift, Norbert P.

doi:10.1021/es00026a005

Cited by 247 publications

(228 citation statements)

References 35 publications

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“…These concentrations were similar to the ones previously measured in Chicago, IL (Cotham and Bidleman, 1995;Pirrone et al, 1995) and in London (Halsall et al, 1994 (Table 1). These concentrations were within the ranges previously measured in Egbert, Ontario (Hoff et al, 1992) and Chicago, IL (Pirrone et al, 1995). Gas-phase Spesticide concentrations ranged from 0.24 to 1.35 ng m À3 (average 0.6370.22 ng m À3 ).…”

Section: Gas-phase Ambient Concentrationssupporting

confidence: 82%

Temperature dependence of gas-phase polycyclic aromatic hydrocarbon and organochlorine pesticide concentrations in Chicago air

Sofuoğlu

2001

Atmospheric Environment

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The temperature dependence of gas-phase atmospheric concentrations of polycyclic aromatic hydrocarbons (PAHs) and organochlorine pesticides measured in Chicago, IL between June and October 1995 were investigated using plots of the natural logarithm of partial pressures (ln P) vs. reciprocal mean temperatures ð1=TÞ: For the eight lowest molecular weight PAHs, temperature dependence was statistically significant (at the 95% confidence level) and temperature accounted for 23-49% of the variability in gas-phase concentrations. The relatively higher slopes for most of the PAHs suggested that volatilization from local sources and short-range transport influenced their concentrations. For pesticides, temperature dependence was statistically significant for DDD and for trans-nonachlor (at the 95% and 90% confidence levels), and was not statistically significant for the other five compounds (2-18% of the variability in their gas-phase concentrations). The relatively lower slopes for individual pesticides suggested that they have mostly nonurban and distant sources.Results of back trajectory analyses suggested that the region, southwest of Chicago, might be an important local or regional source sector for PAHs and organochlorine pesticides. No statistically significant relationship was observed between wind speed and PAH or pesticide concentrations. None of the variables (temperature, wind speed, wind direction, local and regional sources) could fully explain the variation in their concentrations measured in Chicago, therefore, this variation can be attributed to the combined effect of those factors. r

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Section: Gas-phase Ambient Concentrationssupporting

confidence: 82%

Temperature dependence of gas-phase polycyclic aromatic hydrocarbon and organochlorine pesticide concentrations in Chicago air

Sofuoğlu

2001

Atmospheric Environment

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“…Technical grade endosulfan contains approximately 70% a-endosulfan and 30% β-endosulfan, and published information regarding the stability of these compounds in the atmosphere is inconsistent. 44,45 β-endosulfan was also more frequently detected and at higher concentration than a-endosulfan in rain water samples collected in Mato Grosso by Laabs et al 10 Measured levels of endosulfan in rain water in the study areas as well as further studies could be useful to monitor the phase-out of endosulfan use in Brazil by 2013.…”

Section: Occurrence Of Pesticides In Rain Watermentioning

confidence: 93%

Currently used pesticides in water matrices in Central-Western Brazil

Nogueira¹,

Dores²,

Pinto³

et al. 2012

J. Braz. Chem. Soc.

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Este estudo fornece dados sobre a presença dos pesticidas atrazina, clorpirifós, a-endossulfam, β-endossulfam, flutriafol, malatiom e metolacloro em água de áreas urbanas e rurais das cidades de Campo Verde e Lucas do Rio Verde, no estado do Mato Grosso, Brasil. Amostras de água superficial, de chuva e subterrânea foram coletadas nas estações de seca e chuva em 2007 e 2008 nessas importantes áreas produtoras de grãos. Os resultados revelaram maior diversidade de substâncias e frequência de detecção em amostras de água de chuva. Concentrações de atrazina, endossulfam e malatiom foram encontradas acima dos níveis permitidos pela legislação brasileira em algumas amostras de água superficial e subterrânea, e os metabólitos DIA (de-isopropil-atrazina) e endossulfam sulfato foram encontrados em níveis maiores do que os compostos parentais em algumas amostras. Nossos resultados demonstram a vulnerabilidade dos recursos hídricos nessas áreas e apontam para o risco de contaminação de áreas de nascentes de importantes córregos por pesticidas.This study provides data on the presence of the pesticides atrazine, chlorpyrifos, a-endosulfan, β-endosulfan, flutriafol, malathion and metolachlor in water matrices in urban and rural areas of Campo Verde and Lucas do Rio Verde Cities, Mato Grosso State, Brazil. Surface, rain, and groundwater samples were collected in the rainy and dry seasons during 2007 and 2008 in these important grain-producing areas. The findings revealed a higher diversity of compounds and frequency of detection in the rain water than in surface and groundwater samples. Concentrations of atrazine, endosulfan and malathion above those permitted by Brazilian regulations were found in some surface and groundwater samples, and the degradation products DIA (deisopropylatrazine) and endosulfan sulfate, rather than their parental compounds, were found at higher levels in some samples. Our findings show the vulnerability of water systems in these areas and point to the risk of pesticide contamination in important headwater streams.

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“…PCBs have been detected in almost all environmental matrixes (air, soil, water, biota and human tissue) Asplund et al, 1994;Dahle et al, 1995) and in many locations around the world (Watanabe et al, 1996;Hermanson and Hites, 1989;Doskey and Andren, 1981;Halsall et al, 1999;Hoff et al, 1992;Kaupp et al, 1996;Brunciak et al, 2001). The atmosphere serves as an important pathway for global transport of PCBs.…”

Section: Introductionmentioning

confidence: 99%

Dry deposition fluxes and velocities of polychlorinated biphenyls (PCBs) associated with particles

Taşdemir

Odabaşı

Vardar

et al. 2004

Atmospheric Environment

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The interest in atmospheric deposition by the scientific community has increased a great deal over the past several years because of its significant contribution to the pollution budget of many natural waters. Dry deposition is an effective removal mechanism for polychlorinated biphenyls (PCBs) from the atmosphere. This study focuses on the understanding of the particulate dry deposition of PCBs in urban areas. In this paper, 43 chromatographic PCB congener peaks which represent 50 individual or coeluting congeners were evaluated.The PCB dry deposition fluxes were measured using a smooth, greased, knife-edge surrogate surface holding greased Mylar strips in Chicago, IL. The average PCB dry deposition flux measured (190780 ng m À2 day À1 ) was similar to those measured in other urban areas. Ambient air samples were also collected simultaneously with flux samples. The average apparent dry deposition velocity, calculated by dividing the fluxes to the particle phase concentrations was 5.272.9 cm s À1 . This value is in good agreement with the values calculated using similar techniques.

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Annual cycle of polychlorinated biphenyls and organohalogen pesticides in air in southern Ontario. 1. Air concentration data

Cited by 247 publications

References 35 publications

Temperature dependence of gas-phase polycyclic aromatic hydrocarbon and organochlorine pesticide concentrations in Chicago air

Temperature dependence of gas-phase polycyclic aromatic hydrocarbon and organochlorine pesticide concentrations in Chicago air

Currently used pesticides in water matrices in Central-Western Brazil

Dry deposition fluxes and velocities of polychlorinated biphenyls (PCBs) associated with particles

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