1 research outputs found
Adsorption of Anionic-Azo Dye from Aqueous Solution by Lignocellulose-Biomass Jute Fiber: Equilibrium, Kinetics, and Thermodynamics Study
The present investigation describes the evaluation of feasibility
of lignocellulosic-biomass jute fiber (JF) toward adsorptive removal
of anionic-azo dye from aqueous solution. Batch studies illustrated
that dye uptake was highly dependent on different process variables,
pH, initial dye concentration of solution, adsorbent dosage, and temperature.
Further, an attempt has been taken to correlate these process variables
with dye absorption and was optimized through a full-factorial central
composite design (CCD) in response surface methodology (RSM). Maximum
adsorption capacity (29.697 mg/g) under optimum conditions of variables
(pH 3.91, adsorbent dose 2.04 g/L, adsorbate concentration 244.05
mg/L, and temperature 30 °C), as predicted by RSM, was found
to be very close to the experimentally determined value (28.940 mg/g).
Exothermic and spontaneous nature of adsorption was revealed from
thermodynamic study. Equilibrium adsorption data were highly consistent
with Langmuir isotherm yielding <i>R</i><sup>2</sup> = 0.999.
Kinetic studies revealed that adsorption followed pseudo second-order
model regarding the intraparticle diffusion. Activation parameters
for the adsorption process were computed using Arrhenius and Eyring
equations. Maximum desorption efficiency of spent adsorbent was achieved
using sodium hydroxide solution (0.1 M)