Open AccessSequestration of Brilliant Green Dye by Coriander Leaf: Isotherm and Kinetic Studies
Author(s) -
Hemanta Mukherjee,
Soma Mukherjee
Publication year - 2022
Publication title -
trends in sciences
Language(s) - English
Resource type - Journals
ISSN - 2774-0226
DOI - 10.48048/tis.2022.3070
Subject(s) - freundlich equation , adsorption , taguchi methods , langmuir , brilliant green , chemistry , point of zero charge , aqueous solution , nuclear chemistry , zeta potential , langmuir adsorption model , chromatography , chemical engineering , analytical chemistry (journal) , materials science , organic chemistry , nanotechnology , composite material , nanoparticle , engineering
Adsorption process has been performed to investigate the potentiality of coriander leaf to sequester brilliant green (BG) dye from the aqueous phase. Coriander leaf of 75-micron size has been characterized by SEM, BET, FTIR etc. In the present study, emphasis has been given on the removal of BG dye under different conditions viz. dose of biomaterial (10.0 - 100.0 mg), pH (2.0 - 12.0) and dye concentration (10.0 - 100.0 mg/L) by Taguchi optimization. The batch experiments have been conducted at 25 ℃ with stirring speed of 120.0 rpm. The kinetic study is performed at two different temperatures, 30 and 40 ℃. The batch adsorption process for sequestration of the dye followed pseudo-2nd order kinetics (R2 = 0.99). The study also reveals that the Freundlich isotherm is the best fitted (R2 = 0.96) model. The adsorption capacity is 68.49 mg/g and the overall removal efficiency is above 80.0 %.
HIGHLIGHTS
The coriander leaf (75-micron) has been investigated as an effective adsorbent for Brilliant green dye in aqueous environment
Effects of physico-chemical properties of adsorbent (BET, pZC, zeta potential, bulk density, moisture, ash etc.) and the role of several operating parameters (contact time, pH, dose and concentration) have been investigated
Langmuir, Freundlich isotherm models and pseudo-second-order kinetic model favour the adsorption phenomena
L9 orthogonal array (3X3) of Taguchi optimization study with ANOVA analysis predicts the role of control parameters
GRAPHICAL ABSTRACT