Experimental Assessment of the Toxicity Effects of Phone Battery Wastes on Aquatic and Terrestrial Bioindicators
Bright Obidinma Uba, Chisom Judith Okonkwo, Odera Richard Umeh
Asian Journal of Biochemistry, Genetics and Molecular Biology · pp. 17–27 · Published 22 Aug 2020
10.9734/ajbgmb/2020/v5i130117Abstract
Aims: The present study aimed at assessing the toxicity effects of phone battery wastes on aquatic and terrestrial bioindicators. Study Design: Five treatments and the controls designs designated as 6.25%, 12.5%, 25%, 50%, 100%, CTRL and 1 mg/kg, 2 mg/kg, 3 mg/kg, 4 mg/kg, 5 mg/kg, 6 mg/kg, CTRL were set up in triplicates and incubated for 24 h, 72 h and 20 days at 25 ± 2°C. Place and Duration of Study: Department of Microbiology, Chukwuemeka Odumegwu Ojukwu University, Nigeria during May, 2019 - August, 2019. Methodology: The growth inhibition and mortality were analyzed using Aspergillus terreus toxicity test, Allium cepa toxicity test and Limicolaria flammea toxicity test. Results: The results revealed that marine water (7.12 logCFU/mL) was shown to had more fungal count than the fresh water (7.07 logCFU/mL) ecosystem. On A. terreus, Itel in fresh water sample had the highest LC50 values of 30.49% while Gionee in fresh water sample had the lowest LC50 values of 21.74% after 24 h, respectively. The Itel battery sample had higher EC50 value (86.08%) than Gionee battery sample with EC50 value of 65.46% after 72 h on A. cepa. On L. flammea, Itel phone battery sample had lower (5.11%) LC50 value than Gionee phone battery sample with higher (6.20%) LC50 value at 6 mg/kg concentration after 20 days’ exposure, respectively. Conclusion: The results indicate that indiscriminate release of E- wastes into the aquatic and terrestrial environments should be discouraged.
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