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Mapping polychlorinated dibenzo-p-dioxins/dibenzofurans in soils around Pugu municipal dump site in Dar es Salaam, Tanzania: Implications on dermal and soil ingestion exposure for people in the peripheral.
Pius, Christina; Koosaletse-Mswela, Pulane; Sichilongo, Kwenga; Dikinya, Oagile.
Afiliación
  • Pius C; Department of Chemistry, Mkwawa University College of Education, P.O Box 2513, Iringa, Tanzania.
  • Koosaletse-Mswela P; Department of Environmental Science, University of Botswana, Faculty of Science, 00704 Gaborone, Botswana.
  • Sichilongo K; Department of Chemistry, University of Botswana, Faculty of Science, 00704 Gaborone, Botswana. Electronic address: kwenga.sichilongo@mopipi.ub.bw.
  • Dikinya O; Department of Environmental Science, University of Botswana, Faculty of Science, 00704 Gaborone, Botswana.
Environ Pollut ; 258: 113665, 2020 Mar.
Article en En | MEDLINE | ID: mdl-31812523
ABSTRACT
Experimental data on the contribution of a dump site in Tanzania as a point source of the 17 possible congeners of PCDD/Fs to the environment is presented. Dry and wet season samples were collected around Pugu municipal dump site followed by GCxGC-TOFMS analysis. The dominant congeners were OctaCDD, 1,2,3,4,6,7,8-HepCDF; 1,2,3,4,6,7,8-HeptaCDD and 1,2,4,7-PeCDD. The concentrations of the congeners expressed as TEQ WHO2005 ranged from 11.69 to 48.97 pg/g with a mean of 29.44 pg/g for the dry season and TEQ WHO2005 4.13-85.82 pg/g with a mean of 41.51 pg/g for the wet season. These levels were speculated high enough to accumulate in free-range chickens and cause harmful effects to humans that consumed them especially residents around Pugu dump site. Exposure of people to PCDD/Fs through dermal absorption and soil ingestion were estimated using the VLIER-HUMAAN Mathematical model. Exposure through dermal absorption was estimated to be 1.2 × 10-4 and 9.8 × 10-6 ng TEQ/kg day for children and adults respectively while through soil ingestion via consumption of contaminated foods and other sources was 0.0045 and 0.27 ng TEQ/kg day for children and adults respectively. These values however were well below the WHO tolerable daily intake. Generally, there was no significant variation for total PCDD/Fs in the dry and wet season (α = 0.08). Strong positive correlation (r = 0.94) between total PCDD/Fs and organic matter content was observed during the wet season.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Contaminantes del Suelo / Exposición a Riesgos Ambientales / Dibenzofuranos Policlorados / Dibenzodioxinas Policloradas Límite: Adult / Animals / Child / Humans País/Región como asunto: Africa Idioma: En Revista: Environ Pollut Asunto de la revista: SAUDE AMBIENTAL Año: 2020 Tipo del documento: Article País de afiliación: Tanzania

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Contaminantes del Suelo / Exposición a Riesgos Ambientales / Dibenzofuranos Policlorados / Dibenzodioxinas Policloradas Límite: Adult / Animals / Child / Humans País/Región como asunto: Africa Idioma: En Revista: Environ Pollut Asunto de la revista: SAUDE AMBIENTAL Año: 2020 Tipo del documento: Article País de afiliación: Tanzania