Human health risk assessment for intake of root vegetables grown in DDT-contaminated soils

dc.contributor.authorGalindo Fernández, Ginés Inocencio
dc.contributor.departmentChalmers tekniska högskola / Institutionen för arkitektur och samhällsbyggnadsteknik (ACE)sv
dc.contributor.departmentChalmers tekniska högskola / Institutionen för arkitektur och samhällsbyggnadsteknik (ACE)en
dc.contributor.examinerNorrman, Jenny
dc.contributor.supervisorVolchko, Yevheniya
dc.date.accessioned2024-09-27T15:22:09Z
dc.date.available2024-09-27T15:22:09Z
dc.date.issued2024
dc.date.submitted
dc.description.abstractThis thesis has evaluated the SEPA model that determines the acceptable concentration of DDT in the soil, Cig, for private individuals to grow vegetables in the DDT-contaminated soil. DDT was considered in this thesis because it was used extensively in plant nurseries in Sweden in the decades of the 60s and early 70s, and since then, some of this terrain has been sold to individuals and converted to family homes with gardens where it is possible to grow vegetables for self-consumption. To evaluate the model, a sensitivity analysis was performed to find the most sensitive parameters of the model, a systematic literature review following the PRISMA statement was completed to find bibliographic sources with data on the sensitive parameters. Using this data, statistical distributions were calculated using @RISK to replace the point values used for the sensitive parameters in the SEPA model, and with them a probabilistic distribution for Cig was obtained. To evaluate how human behaviour and characteristics affect the exposure risk, different exposure scenarios were developed based on different behaviours. The probabilistic model was compared to an experimental study measuring the uptake of DDT in potatoes. Furthermore, the uptake of DDT in potatoes was compared with the uptake of DDT in radishes presents in another experimental study. This thesis found that the SEPA model calculates a higher exposure risk (lower Cig value) than the probabilistic model the default scenario. The scenario analysis logically confirms that the higher the intake of plants the higher the risk; the SEPA model is a good predictor for the uptake of DDT in potatoes. However, the DDT uptake in radishes is higher than its uptake in potatoes, so the risk of consuming radishes grown in the DDT-contaminated soil likely will be higher than for consuming potatoes grown in the same soil. There is a lack of experimental values for the sensitive parameters available in the searched literature databases. The correction factor between root lipids and octanol, broot, which is the most sensitive parameter of the uptake model had no information available in the literature and should be studied experimentally at more depth.
dc.identifier.coursecodeACEX30
dc.identifier.urihttp://hdl.handle.net/20.500.12380/308825
dc.language.isoeng
dc.setspec.uppsokTechnology
dc.titleHuman health risk assessment for intake of root vegetables grown in DDT-contaminated soils
dc.type.degreeExamensarbete för masterexamensv
dc.type.degreeMaster's Thesisen
dc.type.uppsokH
local.programmeInfrastructure and environmental engineering (MPIEE), MSc
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