Improved biosorption of phenol using crosslinked chitosan beads after modification with histidine and Saccharomyces cerevisiae

Abstract

The ability of chitosan beads modified with histidine and Saccharomyces cerevisiae using glutaraldehyde as a crosslinking agent (SC-HIS-CCBs) for the biosorption of phenol was studied. The surface of SC-HIS-CCBs was characterized by scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR) analysis. Batch biosorption experiments using the SC-HIS-CCBs were then performed by varying contact time, solution pH (2.0 ~ 7.0), and initial phenol concentration (25 ~ 250 mg/L). The isotherm and kinetic data were fitted by suitable equations including the Langmuir, Freundlich, pseudo-firstorder, and pseudo-second-order equations. Thermodynamic parameters of phenol biosorption on the SC-HIS-CCBs were calculated. Desorption of phenol from the loaded SC-HIS-CCBs was performed with NaOH solution. The biosorption capacity of phenol of 28.4 mg/g on the SC-HIS-CCBs at pH 2.0 and 313 K, determined by the Langmuir equation, indicated the promising potential of such modified chitosan biosorbents.

Removing Cr(VI) from Aqueous Solutions via Absorption by Green Synthesized PGA-PL-tannin Gel

“…The van't Hoff equation is the basic method for calculating adsorption thermodynamic parameters [18][19][20]. Thermodynamic parameters associated with the adsorption -that is, standard free energy change (ΔG), standard enthalpy change (ΔH), and standard entropy change (ΔS) -were calculated using equations 5 and 6: (5) …where R (8.314 J/mol/K) is the ideal gas constant, T (K) is the absolute temperature, K L (L/g) is the standard thermodynamic equilibrium constant, and ΔG is the standard free energy change of sorption (kJ/mol).…”

Practical use of dry magnetically controlled biosorbent in purification system of domestic sewage

“…В літературних джерелах [10][11][12][13][14][15][16][17][18] представлено ре зультати досліджень щодо розробки біосорбентів і ви значення їх властивостей.…”

“…Авторами роботи [16] досліджено новий біосорбент для посилення адсорбції іонів Ni (II) з водних розчи нів, в якості якого використано глутаровий альдегід, зшитий хітозаном в кульки, модифіковані гистидином Saccharomyces CEREVISIAE (SCHisБКК). Описані дослідження продовжуються у роботах [3-5, 17, 18] з використання магнітомічених клітин дріжджів для біосорбції іонів важких металів, зокрема і заліза, міді на модельних розчинах.…”

Photocatalytic degradation of phenol by LaFeO3 nanocrystalline synthesized by gel combustion method via citric acid route

“…Phenol, or previously also known as carbolic acid is an aromatic organic compound consisting of a phenyl group (-C 6 H 5 ) bonded to a hydroxyl group (-OH). Phenol-containing substances are toxic, carcinogenic, mutagenic and lead to teratogenic defects [2]. In Malaysia, phenol is designated as scheduled wastes under SW 3 group in First Schedule Environmental Quality Regulations 2005, which is "wastes containing principally organic constituents which may contain metals and inorganics materials" by Malaysia's Department of Environment (DOE).…”