Evaluation of the Ecotoxicity Potentials of E-Waste Using Selenastrum capricornutum (Microalga), Eisenia fetida (Earth Worm) and Allium cepa (Onion Bulb) as Bioindicators

Main Article Content

Bright Obidinma Uba
Ebele Linda Okoye
Blessing Ginika Nweke
Chiamaka Perpetua Ibeneme

Abstract

Aims: This research work was designed to evaluate the ecotoxicity potentials of e-waste using Selenastrum capricornutum, Eisenia fetida and Allium cepa as bioindicators.

Study Design: Selenastrum capricornutum and Allium cepa bulbs were exposed for 72 h at concentration ranging from 0 mg/L to 100 mg/L while Eisenia fetida were exposed for 48 h and 14 days at sub - lethal concentrations ranging from 0 mg/L to 8.54 mg/Lfor Hp laptop battery and 0 mg/L to 9.34 mg/L for Toshiba battery sample, respectively.

Place and Duration of Study: Department of Microbiology, Chukwuemeka Odumegwu Ojukwu University (COOU), Uli Anambra State, Nigeria during May, 2019 - December, 2019.

Methodology: A laboratory scale study was carried out on spent Hp and Toshiba laptop battery samples using microalgal toxicity test, earthworm mortality test and Allium cepa tests.

Results: The result showed that the spent Toshiba battery sample had the most hazardous toxic effect (ErC50 19.58 mg/L; EC50 34.54%; LC50 3.60 mg/kg and 3.16 mg/kg) on the growth rate of S. capricornutum, root growth of A. cepa and E. fetid a survival after the treatment periods. Morphological abnormalities were also observed on the exposed roots of A. cepa. Inhibition (%), biomass change and mortality (%) of all species used were found to be concentration dependent with significant (P < 0.05) strong positive correlation at increasing concentrations.

Conclusion: Thus, the government should enforce strict regulations and heavy fines on industries, which do not practice E - waste prevention and recovery in the production facilities.

Keywords:
Electronic-waste, mortality test, rhizo-toxicity, genotoxicity, ecological contamination

Article Details

How to Cite
Uba, B. O., Okoye, E. L., Nweke, B. G., & Ibeneme, C. P. (2020). Evaluation of the Ecotoxicity Potentials of E-Waste Using Selenastrum capricornutum (Microalga), Eisenia fetida (Earth Worm) and Allium cepa (Onion Bulb) as Bioindicators. Asian Journal of Biotechnology and Genetic Engineering, 3(2), 20-31. Retrieved from https://journalajbge.com/index.php/AJBGE/article/view/30077
Section
Original Research Article

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