| Autor: |
Kassimu, Habiba, Sallau, Abdullahi Balarabe, Nzelibe, Humphrey Chukwuemeka, Isa, Muhammed Tijjani, Ahmad, Ambi Ambi |
| Zdroj: |
Chemistry Africa; 20220101, Issue: Preprints p1-8, 8p |
| Abstrakt: |
Hexavalent chromium, (Cr VI) continues to cause harm in aquatic and terrestrial environments. In this study Cr (VI) bioreduction potentials of anthocyanins-rich extract (ARE) of watermelon rinds (an agro-waste) was investigated with respect to effect of process conditions: concentration of anthocyanin, time, temperature, pH, as well as concentration of Cr (VI) in toxic chromium contaminated waste water samples. Anthocyanin was extracted using 0.1% HCl (v/v) in methanol to obtain the anthocyanin extract. Partial purification of anthocyanin extract was carried out after solvent extraction by solid phase extraction technique to obtain ARE. Characterization was done with UV–Vis Spectroscopy. Batch process was used to study effect of ARE on Cr (VI) bioreduction efficiency under the influence of the process conditions. The result obtained show that ARE of watermelon rind was 71.2% pure. Also, that bioreduction of hexavalent chromium (Cr VI) by ARE was dependent on concentration of anthocyanin, time, temperature, pH as well as Cr (VI) concentration where an optimum concentration of 0.1 mg/ml of the extract was able to bioreduce 93% of the initial Cr (VI) concentration within 20 min, at a temperature of 250C and pH of 7. The relevance of these findings indicate how significant agro-wastes could be in sourcing for bioreductants for potential use in Cr (VI) bioremediation. |
| Databáze: |
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