The removal of rhodamine B dye from aqueous solution using Casuarina equisetifolia needles as adsorbent

MRR Kooh, MK Dahri, LBL Lim - Cogent environmental science, 2016 - Taylor & Francis
Cogent environmental science, 2016Taylor & Francis
Casuarina equisetifolia needle (CEN), a lignocellulosic-rich and sustainable material, was
used in order to investigate its ability as an adsorbent to remove rhodamine B (RB) dye from
aqueous solution. Fourier Transform Infrared spectrometer was used to characterise CEN
functional groups and scanning electron microscope was used to study its surface
morphology. Batch experiments were done in order to determine the effect of some
parameters such as adsorbent dosage, initial pH, contact time, ionic strength, temperature …
Abstract
Casuarina equisetifolia needle (CEN), a lignocellulosic-rich and sustainable material, was used in order to investigate its ability as an adsorbent to remove rhodamine B (RB) dye from aqueous solution. Fourier Transform Infrared spectrometer was used to characterise CEN functional groups and scanning electron microscope was used to study its surface morphology. Batch experiments were done in order to determine the effect of some parameters such as adsorbent dosage, initial pH, contact time, ionic strength, temperature and initial dye concentration. Kinetics, isotherm modelling and thermodynamics studies were also performed in order to explore an insight into the mechanism of the adsorption process. The study showed that the adsorption of RB by CEN is endothermic in nature and follows the pseudo-second-order kinetics model. The Langmuir isotherm model fitted the experimental data best with a maximum adsorption capacity of 82.34 mg g−1.
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