Dissipation of DDT in a heavily contaminated soil in Mato Grosso, Brazil

Villa, Ricardo Dalla; Dores, Eliana Freire Gaspar de Carvalho; Carbo, Leandro; Cunha, Marcelo L. F.

doi:10.1016/j.chemosphere.2005.11.019

Cited by 25 publications

(3 citation statements)

References 25 publications

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“…Figure illustrates the vertical distributions of DDTs and dicofol in the soil profiles at the former DDT production site, and it clearly shows that the concentrations of DDTs (0.01–664.6 ppm) were much higher than those of dicofol, but much lower than in the soil of the former dicofol production site, especially in deep layer soil. They were also much lower than the average concentrations of DDTs (3800–7300 mg/kg) found in some reported heavily contaminated sites, but much higher than in urban renewal soil in Beijing . DDT concentrations at this site were much higher than that in soils from Hong Kong (0.007–0.31 μg/kg), the United States (<1 μg/kg), and that in agricultural soil of China. , They were close to concentrations of DDTs (0.775–226.711 mg/kg) reported by Zhao et al in measuring the soil around a pesticide factory in Zibo, China .…”

Section: Resultssupporting

confidence: 74%

“…The total OCP concentrations of S2 and S3, which were located in the center of the workshop, were much higher than those of S1 and S4 in the same soil layer. They were much higher than those not only in urban or agricultural soils from various countries, − but also around a pesticide factory in Zibo city of China, while close to those in a heavily contaminated site . In particular, S3 showed very high concentration levels, among which the highest DDT concentration (6071 ppm) was in the soil layer at the depth of 2.0–2.5 m. The concentrations of DDTs and dicofol were hundreds to thousands of ppm at 2.5 m below the soil surface.…”

Section: Resultsmentioning

confidence: 85%

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DDT Vertical Migration and Formation of Accumulation Layer in Pesticide-Producing Sites

Liu

Bai

Man

et al. 2015

Environ. Sci. Technol.

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Soil samples were collected at various depths (0.5-21.5 m) from ten boreholes that were drilled with a SH-30 Model Rig, four of which were at a dicofol production site while six were at a dichlorodiphenyltrichloroethane (DDT) production site. In industrial sites, the shallow soils at depths of 0-2 m were mostly backfill soils, which cannot represent the contamination situation of the sites. The contaminated levels in the deep original soil can represent the situation in contaminated sites. All the soil samples investigated at the DDT and dicofol production sites were found to be seriously polluted. The contents of both DDT (0.6-6071 mg/kg) and dicofol (0.5-1440 mg/kg) were much higher at the dicofol production site than at the DDT production site (DDTs, 0.01-664.6 mg/kg; dicofol, <0.1 mg/kg), even in the deep soil. DDTs had a different distribution in the soil of the pesticide production site from that in the soil outside the sites and that in agricultural soils. The results of the investigation revealed that DDTs were easily enriched in cohesive soil and in the bottom zone of aquifers, where the concentration was higher than in above the layers. DDTs were found to be hard to degrade, and their degradation speed was slower than their vertical migration, despite the fact that hydrophobic DDTs did not migrate easily in soils. In the dicofol production site, the value of DDE/DDD cannot indicate the degradation condition of DDTs, nor can the value of (DDE + DDD)/DDT identify how long DDTs have remained in the soil. It is debatable that the half-life of DDT inputted to soils is about 20-30 years, maybe longer than the generally recognized time.

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Section: Resultssupporting

confidence: 74%

Section: Resultsmentioning

confidence: 85%

DDT Vertical Migration and Formation of Accumulation Layer in Pesticide-Producing Sites

Liu

Bai

Man

et al. 2015

Environ. Sci. Technol.

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“…Além do uso ilegal, a presença de contaminação recente por DDT pode estar relacionada a três fatores: (i) uso do pesticida em campanhas públicas para eliminação de vetores de doenças como dengue e malária, conforme observado em algumas áreas dos estados do Amazonas, São Paulo e Paraná (Mendes et al, 2016) (ii) volatilização e/ou lixiviação a partir de solos previamente contaminados, conforme observado no Mato Grosso do Sul (Dalla Villa et al, 2006); ou (iii) presença de DDT como impureza no acaricida Dicofol e/ou degradação lenta do DDT, como sugerido em um estudo no Rio Jaguaribe, Ceará (Oliveira et al, 2016).…”

Section: Públicaunclassified

Desenvolvimento De Método Multiresíduo Em Gc-MS/MS E Lógica Fuzzy No Estudo De Pahs, Pcbs, Pbdes E Pesticidas Organoclorados E Sua Aplicação Em Sistemas Costeiros Do Brasil

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Distribution of DDT in a Typical DDT Waste Contaminated Site

Liu

Zheng

et al. 2008

Bull Environ Contam Toxicol

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Serious pollution was found in the soil under a historically DDT workshop and the highest level of P DDT was 2682.86 mg/kg. The vertical distribution of DDT shows that the levels of DDT decreased significantly with increase of depth, which mainly because the infiltration of rainwater was inhibited by the cement or brick surface. The DDT polluted soil area was 6,814 m 2 and the polluted soil volume 4,398 m 3 above 10 mg/kg. The ratio of (DDE + DDD) to DDT showed that part of the p,p 0 -DDT was degraded to DDD and DDE in the soil.

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Dissipation of DDT in a heavily contaminated soil in Mato Grosso, Brazil

Cited by 25 publications

References 25 publications

DDT Vertical Migration and Formation of Accumulation Layer in Pesticide-Producing Sites

DDT Vertical Migration and Formation of Accumulation Layer in Pesticide-Producing Sites

Desenvolvimento De Método Multiresíduo Em Gc-MS/MS E Lógica Fuzzy No Estudo De Pahs, Pcbs, Pbdes E Pesticidas Organoclorados E Sua Aplicação Em Sistemas Costeiros Do Brasil

Distribution of DDT in a Typical DDT Waste Contaminated Site

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