The analysis of genotoxicity of e-waste dumpsites in and around Metro Manila, Philippies using Allium cepa assay as a bioindicator
The extraordinary growth in the usage of electronic gadgets and their improper disposal has led to the enormous problem of electronic waste management in the Philippines. The improper disposal of the e-waste can lead to the exposure to the hazardous substances that can be harmful to the humans as we...
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| Main Authors: | , , , |
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| Format: | text |
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Animo Repository
2016
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| Online Access: | https://animorepository.dlsu.edu.ph/faculty_research/12045 |
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| Institution: | De La Salle University |
| Summary: | The extraordinary growth in the usage of electronic gadgets and their improper disposal has led to the enormous problem of electronic waste management in the Philippines. The improper disposal of the e-waste can lead to the exposure to the hazardous substances that can be harmful to the humans as well as to the environment. This study was carried out to present evidence for the association between e-waste exposure and genotoxicity. Genotoxicity of the e-waste from three different e-waste landfills sites in and around Manila, specifically located at pier 18 (former Smokey mountain) were investigated using the Allium cepa bioassay. Morphological modifications of the Allium cepa roots, inhibition of root growth, mitotic index and the induction of high frequency of chromosomal aberrations comprising of chromosome fragments, laggards, anaphase and telophase bridges and C-mitotic effect were observed in the Allium cepa roots exposed to e-waste leachates prepared from the soil samples collected from all three sites tested as compared to the control. Since heavy metals are one of the hazardous components released during e-waste recycling, the Atomic absorption spectroscopy was carried out to find the presence of heavy metals in the soil samples collected from the three e-waste dumpsites. The informal e-waste recyclers inhabit most of these sites; hence Atomic absorption spectroscopy was carried out to detect the presence of heavy metals in the hair samples of these recyclers. The preliminary investigations establish the genotoxicity of e-waste and could lead to initiation of cancer, and other health related issues in the Filipino population. Hnece, a proper e-waste management is an absolute priority to minimize the risk to the Filipino population and at the same time save the environment. |
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