Sources, distribution, and risk assessment of organochlorine pesticides in Nairobi City, Kenya
| Autor: | Fred Ayodi Lisouza, P. Okinda Owuor, Joseph O. Lalah |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
China
Environmental Engineering 010504 meteorology & atmospheric sciences Industrial area Organochlorine pesticide General Medicine 010501 environmental sciences Kenya Risk Assessment 01 natural sciences Semipermeable membrane devices Renal Dialysis Environmental chemistry Hydrocarbons Chlorinated Humans Environmental Chemistry Environmental science Cities Pesticides Child Risk assessment Environmental Monitoring 0105 earth and related environmental sciences General Environmental Science Passive sampling |
| Zdroj: | Journal of Environmental Sciences. 96:178-185 |
| ISSN: | 1001-0742 |
| Popis: | The distribution and sources of organochlorine pesticides (OCPs) in air and surface waters were monitored in Nairobi City using triolein-filled semipermeable membrane devices (SPMDs). The SPMDs were extracted by dialysis using n-hexane, followed by cleanup by adsorption chromatography on silica gel cartridges. Sample analysis was done by GC-ECD and confirmed by GC–MS. Separation of means was achieved by analysis of variance, followed by pair-wise comparison using the t-test (p≤ 0.05). The total OCPs ranged between 0.018 – 1.277 ng/m3 in the air and Kibera > Industrial Area > City Square > Ngong’ Forest. However, these were lower than the USEPA acceptable risks, 10−6 – 10−4. This study concluded that atmospheric OCPs did not pose significant cancer risks to the residents. |
| Databáze: | OpenAIRE |
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