Equilibrium, Kinetic, and Thermodynamic Studies of Azo Dye Adsorption from Aqueous Solution by Chemically Modified Lignocellulosic Jute Fiber
Citations Over TimeTop 1% of 2013 papers
Abstract
The lignocellulosic biomass jute fiber (JF) was chemically modified with polyphenolic tannin in aqueous medium by epoxy activation under mild conditions and applied as a potential adsorbent for the removal of Congo Red, a model azo dye, from aqueous solution. The virgin and tannin-modified JF samples were characterized by solid-state nuclear magnetic resonance spectroscopy, Fourier transform infrared spectroscopy, and scanning electron microscopy. Within the studied range of dye concentrations, the adsorption equilibrium was found to follow the Langmuir isotherm model well, with R2 > 0.99. The rate of adsorption of the dye onto treated JF was very high, and equilibrium was attained within 15–30 min of contact. The efficiency of modified JF for the spontaneous and exothermic adsorption of azo dye is attributed to the copious availability of hydroxyl and other polar functional groups on the fiber surface. The present adsorption studies of azo dye from aqueous solution revealed the potential of modified JF to be utilized as an alternative, inexpensive, and environmentally benign adsorbent for water purification.
Related Papers
- → The langmuir isotherm: A commonly applied but misleading approach for the analysis of protein adsorption behavior(2014)274 cited
- → Algal biochar: A natural solution for the removal of Congo red dye from textile wastewater(2023)39 cited
- → Modified Langmuir Equation for S-Shaped and Multisite Isotherm Plots(1998)67 cited
- → Superior adsorption capacity of Fe3O4@nSiO2@mSiO2 core-shell microspheres for removal of congo red from aqueous solution(2016)54 cited
- → Rethinking the Use of Linear Forms of the Langmuir Isotherm in Adsorption Modeling to Calculate Langmuir Isotherm Parameters(2023)4 cited