Adsorption isotherms and kinetics for the removal of cationic dye by Cellulose -based adsorbent biocomposite films
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pISSN: 0256-1115 eISSN: 1975-7220
INVITED REVIEW PAPER
INVITED REVIEW PAPER
Adsorption isotherms and kinetics for the removal of cationic dye by Cellulose-based adsorbent biocomposite films Noppon Somsesta*, Chaichana Piyamawadee*, Viboon Sricharoenchaikul**, and Duangdao Aht-Ong*,***,† *Department of Materials Science, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand **Department of Environmental Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, 10330, Thailand ***Center of Excellence on Petrochemical and Materials Technology, Chulalongkorn University, Bangkok, 10330, Thailand (Received 12 February 2020 • Revised 1 June 2020 • Accepted 4 June 2020) AbstractVarious fillers (commercial, nipa palm, sisal activated carbon, zeolite) were incorporated with regenerated cellulose matrix that dissolved using lithium chloride/N, N-dimethylacetamide solution. The biosorbent films were successfully prepared via solution casting and then characterized by Fourier transform infrared spectrometer (FTIR), Xray Diffractometer (XRD), thermogravimetric analyzer (TGA), and scanning electron microscope (SEM). The biocomposite films with embedded commercial activated carbon exhibited the largest adsorption capacity of methylene blue (146.81 mg g 1). Although the adsorption ability of the nipa palm and sisal activated carbon biocomposite was lower than the commercial activated carbon biosorbent film, both nipa palm and sisal activated carbon still could potentially be used as an alternative filler for cationic dye removal. On the contrary, zeolite had low adsorption efficiency owing to its morphology. The equilibrium adsorption experiment revealed that the Langmuir isotherm model best fitted the biocomposite films with commercial and sisal activated carbon, whereas the Freundlich adsorption model suited the biosorbent films with nipa palm activated carbon and zeolite than other models. The kinetics results of adsorption for all biocomposite films were well described using a pseudo-second-order kinetic model. The cellulose/activated carbon films would be promisingly utilized as a biosorbent for treatment of dye-contaminated wastewater. Keywords: Cellulose Biocomposite Film, Isotherm, Activated Carbon, Methylene Blue Adsorption, Kinetic
duced by carbonization of biomass at elevated temperature under inert condition, a process called “pyrolysis” [10]. Recently, different kinds of biomass were used as precursor to make activated carbon [11-13]. To optimize the activated carbon adsorption performance, several researchers have investigated the effect of pyrolysis conditions; for example, retention time [14,15], pyrolysis temperature [16,17], heating rate [18,19], and pressure [20] on specific surface areas and porous characteristic. However, activated carbon and many commercial absorbents are usually utilized in the form of powder, which makes it difficult to recover and regenerate. This restricted their practical application because if the powdered adsorbents were directly used and remained in
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