Design of composite chitosan/algae/zeolite by freeze- or air-drying: A comparative adsorbent analysis for optimized removal of brilliant green dye.

Autor: Suhaimi A; Faculty of Applied Sciences, Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia; Advanced Biomaterials and Carbon Development (ABCD) Research Group, Faculty of Applied Sciences, Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia., Jawad AH; Faculty of Applied Sciences, Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia; Advanced Biomaterials and Carbon Development (ABCD) Research Group, Faculty of Applied Sciences, Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia; Environmental and Atmospheric Sciences Research Group, Scientific Research Center, Al-Ayen University, Thi-Qar, Nasiriyah 64001, Iraq. Electronic address: ali288@uitm.edu.my., Yusoff MZM; Faculty of Applied Sciences, Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia., Wilson LD; Department of Chemistry, University of Saskatchewan, Saskatoon, SK S7N 5C9, Canada., ALOthman ZA; Advanced Materials Research Chair, Chemistry Department, College of Science, King Saud University, Riyadh 11451, Saudi Arabia.
Jazyk: angličtina
Zdroj: International journal of biological macromolecules [Int J Biol Macromol] 2024 Dec 17; Vol. 288, pp. 138650. Date of Electronic Publication: 2024 Dec 17.
DOI: 10.1016/j.ijbiomac.2024.138650
Abstrakt: A bio-composite material was developed that contains chitosan, food-grade algae, and zeolite for the removal of brilliant green (BG) dye. The synthesized bio-composite was dried via two different methods (air-drying; AD, and freeze-drying; FD). The physicochemical characterization of air-dried chitosan-algae-zeolite (Cs-Alg-Zl-AD) and freeze-dried chitosan-algae-zeolite (Cs-Alg-Zl-FD) were investigated by spectroscopy (FTIR, SEM-EDX, and XPS), diffraction (XRD), surface charge via pH pzc , specific surface area (SSA) and elemental analyses. The utilization of Box-Behnken Design (BBD) was intended to optimize the three input variables, which are adsorbent dosage, pH of medium, and contact time. The adsorption optimization process yielded optimal conditions, which were verified through a desirability test and implemented in batch-mode equilibrium experiments. The Cs-Alg-Zl-FD has a higher specific surface area (SSA = 3.29 m 2 /g) compared to Cs-Alg-Zl-AD (SSA = 1.79 m 2 /g). The Cs-Alg-Zl-FD shows greater adsorptive removal of BG (98.6 %) over Cs-Alg-Zl-AD (88.6 %), in parallel agreement with differences in the SSA. Moreover, the maximum BG dye adsorption capacities of Cs-Alg-Zl-FD (119.5 mg/g) and Cs-Alg-Zl-AD (108 mg/g) at pH = 8.1 and 25 °C. The Freundlich model fits best with Cs-Alg-Zl-AD while Langmuir and Temkin models account for the Cs-Alg-Zl-FD dye adsorption. The Cs-Alg-Zl-FD shows greater dye adsorption over four adsorption cycles, as compared with the Cs-Alg-Zl-AD.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
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Databáze: MEDLINE
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