Application of alginate extraction residue for Al(III) ions biosorption: a complete batch system evaluation

• Published in: Environmental science and pollution research international Vol. 28; no. 37; pp. 51826 - 51840
• Main Authors: Costa, Heloisa Pereira de Sá, da Silva, Meuris Gurgel Carlos, Vieira, Melissa Gurgel Adeodato
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01-10-2021; Springer Nature B.V
• Subjects: Adsorption; Adsorptivity; Alginates; Alginic acid; Aluminum; Aquatic Pollution; Aqueous solutions; Atmospheric Protection/Air Quality Control/Air Pollution; Biosorption; Earth and Environmental Science; Ecotoxicology; Environment; Environmental Chemistry; Environmental Health; Environmental science; Evaluation; High temperature; Low temperature; Pycnometry; Research Article; Residues; Thermodynamic equilibrium; Thermogravimetry; Waste Water Technology; Water Management; Water Pollution Control; Water treatment; Batch design; Brown algae; Biosorption; Aluminum; Residue
• ISSN: 0944-1344; 1614-7499
• DOI: 10.1007/s11356-021-14333-3

The residue derived from the alginate extraction from
S. filipendula
was applied for the biosorption of aluminum from aqueous medium. The adsorptive capacity of the residue (RES) was completely evaluated in batch mode. The effect of pH, contact time, initial concentration, and temperature was assessed through kinetic, equilibrium, and thermodynamic studies. The biosorbent was characterized prior and post-Al biosorption by N
2
physisorption, Hg porosimetry, He pycnometry, and thermogravimetry analyses. Equilibrium was achieved in 60 min. Kinetics obeys pseudo-second-order model at aluminum higher concentrations. Isotherms followed Freundlich model at low temperature (293.15 K) and D-R or Langmuir model at higher temperatures (303 and 313 K). Data modeling indicated the occurrence of both chemical and physical interactions in the aluminum adsorption mechanism using RES. The maximum adsorption capacity obtained was 1.431 mmol/g at 293 K. The biosorption showed a spontaneous, favorable, and exotherm character. A simplified batch design was performed, indicating that the residue is a viable biosorbent, achieving high percentages of removal using low biomass dosage.