Spatial variability of atmospheric semivolatile organic compounds in Chile

Shunthirasingham, Chubashini; Barra, Ricardo; Mendoza, Gonzalo; Montory, Mónica; Oyiliagu, Catherine E.; Lei, Ying Duan; Wania, Frank

doi:10.1016/j.atmosenv.2010.10.027

Cited by 39 publications

(25 citation statements)

References 34 publications

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“…The higher regression slope of 2,4 0 -DDT than the one of 4,4 0 -DDT indicated 2,4 0 -DDT exhibit higher potential of partitioning in colder condition experienced with altitude. A range of other researches also noted increasing air concentrations of endosulfan (Shunthirasingham et al, 2011) and other POPs (Loewen et al, 2008;Wania, 1999) with elevation and ascribed it to re-evaporation effect. Although the deposition of POPs increases with altitude, the capacity of high altitude environment to retain them decreases (sparse vegetation cover, lower organic matter in soil).…”

Section: Seasonality and Slope Variations Of Popsmentioning

confidence: 89%

Environmental fate and behavior of persistent organic pollutants in Shergyla Mountain, southeast of the Tibetan Plateau of China

Zhu

Schramm

Wang

et al. 2014

Environmental Pollution

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a b s t r a c tPristine mountains are ideal settings to study transport and behavior of persistent organic pollutants (POPs) along gradients of climate and land cover. The present work investigated the concentrations and patterns of 28 organochlorine pesticides (OCPs), 25 polychlorinated biphenyl (PCBs), 13 polybrominated diphenyl ethers (PBDEs), and 3 hexabromocyclododecane (HBCDs) isomers in the air of the Shergyla Mountain, southeastern Tibetan Plateau. Endosulfan _, hexachlorobenzene, pentachlorobenzene, hexachlorocyclohexanes and dichlorodibenzotrichloroethane and its degradation products (DDTs) were the predominant compounds while PBDEs and HBCDs showed the lowest background concentrations. Most of the target POPs had significantly higher concentrations in summer than those in winter. Increasing trends of the concentrations of DDTs and endosulfan were found with increasing altitude on the western slope in the Shergyla Mountain. Potential forest filter effect was observed based on the lower air concentrations of the target POPs in the forest than the ones out of the forest.

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Section: Seasonality and Slope Variations Of Popsmentioning

confidence: 89%

Environmental fate and behavior of persistent organic pollutants in Shergyla Mountain, southeast of the Tibetan Plateau of China

Zhu

Schramm

Wang

et al. 2014

Environmental Pollution

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“…Endosulfan increased concomitantly with altitude without marked differences among regions. In the case of chlorotalonil, the concentrations were higher in zones close to urban areas (53). As expected from the well-known behavior of HCBs, concentrations of this chemical in all samples were similar without any significant difference.…”

Section: Chilementioning

confidence: 50%

“…Other research from Chile performed by Pozo et al (54), using PAS with PUF disks, reported the occurrence of OCPs, PCBs and PBDEs at low concentrations. Conversely, the results of Shunthirasingham et al (53), showed a decreasing endosulfan gradient from north to south. Concentrations of PCBs and PAHs in urban particles from Santiago and Temuco were comparable to others from around the world (55).…”

Section: Chilementioning

confidence: 89%

“…As predicted from its physical-chemical properties, hexachlorobenzene (HCB), had largely uniform air concentrations with latitude and altitude. For this reason, HCB is usually used to derive sampler specific sampling rates for passive samplers (53). Other research from Chile performed by Pozo et al (54), using PAS with PUF disks, reported the occurrence of OCPs, PCBs and PBDEs at low concentrations.…”

Section: Chilementioning

confidence: 98%

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Assessment of Persistent Organic Pollutants in the Atmosphere of Latin America

Miglioranza

González

Ondarza

et al. 2013

ACS Symposium Series

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“…1), and its levels were not uniformly distributed across Costa Rica as had been observed in the Chilean [28], North American [29], and European [30] atmosphere. The concentrations of HCB ranged from 19 to 120 pg Á m À3 (Supplemental Data, Table S1), with the highest concentrations in samples from the central valley.…”

Section: Passive Air Samplersmentioning

confidence: 74%

Current‐use pesticide transport to Costa Rica's high‐altitude tropical cloud forest

Shunthirasingham¹,

Gouin²,

Lei³

et al. 2011

Enviro Toxic and Chemistry

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To gain insight into the atmospheric transport and deposition of organic contaminants in high-altitude forests in the humid tropics, pesticides were analyzed in air, water, and soil samples from Costa Rica. Passive samplers deployed across the country revealed annually averaged air concentrations of chlorothalonil, endosulfan, and pendimethalin that were higher in areas with intensive agricultural activities than in more remote areas. Atmospheric concentrations were particularly high in the intensively cultivated central valley. Only endosulfan and its degradation products were found in soils sampled along an altitudinal transect on the northern side of Volcano Turrialba, which is facing heavily cultivated coastal plains. Consistent with calculations of cold trapping in tropical mountains, concentrations of endosulfan sulfate increased with altitude. Pesticide levels in lake, creek, fog, and arboreal water samples from high-elevation cloud forests were generally below 10 ng · L(-1). Endosulfan sulfate was the most abundant pesticide in water, with concentrations ranging from 0.4 to 9.4 ng · L(-1). Its levels were highest in water sampled from bromeliads. Levels of total endosulfan in water are much lower than the reported median lethal concentration (LC50) value for acute toxicity of α-endosulfan to tadpoles. Although this suggests that the presence of pesticide might not have a direct impact on amphibian populations, the possibility of effects of chronic exposure to a mixture of substances cannot be excluded. Fog was relatively enriched in some of the analyzed pesticides, such as dacthal and chlorothalonil, and may constitute an important deposition pathway to high-altitude tropical cloud forest.

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Spatial variability of atmospheric semivolatile organic compounds in Chile

Cited by 39 publications

References 34 publications

Environmental fate and behavior of persistent organic pollutants in Shergyla Mountain, southeast of the Tibetan Plateau of China

Environmental fate and behavior of persistent organic pollutants in Shergyla Mountain, southeast of the Tibetan Plateau of China

Assessment of Persistent Organic Pollutants in the Atmosphere of Latin America

Current‐use pesticide transport to Costa Rica's high‐altitude tropical cloud forest

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