Biosorption of Nickel ions by Immobilized and Free Biomass of the Freshwater Alga Chlorosarcinopsis eremi | ||
| Egyptian Journal of Aquatic Biology and Fisheries | ||
| Article 98, Volume 28, Issue 4, July and August 2024, Pages 1623-1642 PDF (1.7 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/ejabf.2024.374325 | ||
| Author | ||
| Al-Atbee et al. | ||
| Abstract | ||
| Biosorption is an effective technique for removing heavy metals from the aquatic environment. The aim of this study was to assess the potential of microalgae species Chlorosarcinopsis eremi in immobilized and free biomass state for nickel removal. Removal efficiency was studied at pH 7± 2, temperature of 25C ̊ , initial metal concentrations of 5, 10 and 15ppm, contact time ranging from 0– 8 days, and agitation speed of 120rpm. The highest removal percentages for all coefficients (immobilized biomass, free biomass, and blank alginate beads) were recorded at a concentration of 5 ppm, with values of 62.74, 49.54, and 38.86%, respectively. While, the lowest percentage of removal was associated with concentration of 15ppm for all coefficients, as it reached 50.27, 35.04, and 24.30%, respectively. The relationship was positive between the percentage of removal and increased exposure to the metal ions and reached its maximum on the sixth and eighth days of the experiment, for all coefficients and concentrations. While the highest removal percentage of blank alginate beads was recorded at the second and fourth days of the experiment. Biosorption was analyzed using Langmuir and Freundlich isotherms. Additionally, scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDX) analyses conducted before and after biosorption revealed that nickel ions were primarily adsorbed onto the surface of the algae cells during the biosorption process. | ||
| Keywords | ||
| Biosorption; Chlorosarcinopsis; Green algae; Immobilization; Nickel | ||
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