Journal
ENVIRONMENTAL TECHNOLOGY & INNOVATION
Volume 11, Issue -, Pages 105-115Publisher
ELSEVIER
DOI: 10.1016/j.eti.2018.05.003
Keywords
Aluminum; Adsorption; P. putida; Fixed-bed column
Funding
- FONCyT [PICT-2013-1475]
- SECYT-UNRC [PPI: 18/C412]
- CONICET of Argentina [PIP: 11220100100212CO]
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Non-viable biomass of Pseudomonas putida immobilized in agar-agar was used as adsorbent to remove aluminum from aqueous solutions. In batch assays, adsorption equilibrium was reached after 45 mm and 95% of 2.7 mg/L Al3+ were adsorbed. Immobilized biomass was packed to obtain a fixed-bed column and the dynamic behavior in continuous mode was established through breakthrough curves. At different flow rates (0.5 and 1.0 mL/min) the adsorption capacity of the column did not change, but removal percentage was higher at the lowest flow rate (64.92% and 44.34%, respectively). The fixed-bed column presented a higher biosorption capacity than that obtained in batch experiments (0.15 and 0.09 mg Al3+/g beads, respectively), and showed stability for up to 12 successive adsorption/desorption cycles with negligible loss in adsorption efficiency. We concluded
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