Adsorption Of Rhodamine B And Malachite Green From Aqueous Solutions Onto Nanocomposites Composed Of Biomass, Silver Nanoparticles And Carbon Nanotubes
ABSTRACT
Nanocomposites adsorbents were fabricated from different types of plant biomass and
functionalized multiwalled carbon nanotubes decorated
with silver nanoparticles (Ag/f-MWCNTs). A set of adsorption experiments were
performed to determine the effect of solution pH, agitation time, adsorbate
temperature, adsorbent dose, initial dye concentration, and desorption of the
dyes in order to validate the efficiency of these nanocomposites to eliminate
rhodamine B (RhB) and malachite green oxalate (MGO) from aqueous solution. The results obtained showed an increase in RhB and MGO uptake with increased
contact time, adsorbent dose, and initial concentration of RhB or MGO. The optimum uptake was observed at pH 3 for
RhB and pH 7 for MGO. Kinetics studies
showed that the adsorption of MGO and RhB proceeded according to the pseudo-second order and Elovich models,
respectively. Equilibrium data obtained
from the uptake of RhB and MGO
were best described
by the Langmuir and Sips isotherm models. The
thermodynamic parameters (ΔG°, ΔH° and ΔS°) of the adsorption process revealed
that the uptake of RhB and MGO by the adsorbents was entropy-driven, feasible,
and spontaneous. The composites
demonstrated higher uptake capacities than Ag/f-MWCNTs for the removal of MGO. Meanwhile, the reverse was the case in the elimination of RhB. The nanocomposite materials demonstrated good
capacity to eliminate MGO and RhB from aqueous systems, and have shown the
ability to be reused. Hence, these
nanomaterials are suitable for wastewater treatment at the industrial scale.
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MICHAEL, U (2023). Adsorption Of Rhodamine B And Malachite Green From Aqueous Solutions Onto Nanocomposites Composed Of Biomass, Silver Nanoparticles And Carbon Nanotubes. Repository.mouau.edu.ng: Retrieved May 12, 2024, from https://repository.mouau.edu.ng/work/view/adsorption-of-rhodamine-b-and-malachite-green-from-aqueous-solutions-onto-nanocomposites-composed-of-biomass-silver-nanoparticles-and-carbon-nanotubes-7-2
UNIVERSITY, MICHAEL. "Adsorption Of Rhodamine B And Malachite Green From Aqueous Solutions Onto Nanocomposites Composed Of Biomass, Silver Nanoparticles And Carbon Nanotubes" Repository.mouau.edu.ng. Repository.mouau.edu.ng, 21 Jun. 2023, https://repository.mouau.edu.ng/work/view/adsorption-of-rhodamine-b-and-malachite-green-from-aqueous-solutions-onto-nanocomposites-composed-of-biomass-silver-nanoparticles-and-carbon-nanotubes-7-2. Accessed 12 May. 2024.
UNIVERSITY, MICHAEL. "Adsorption Of Rhodamine B And Malachite Green From Aqueous Solutions Onto Nanocomposites Composed Of Biomass, Silver Nanoparticles And Carbon Nanotubes". Repository.mouau.edu.ng, Repository.mouau.edu.ng, 21 Jun. 2023. Web. 12 May. 2024. < https://repository.mouau.edu.ng/work/view/adsorption-of-rhodamine-b-and-malachite-green-from-aqueous-solutions-onto-nanocomposites-composed-of-biomass-silver-nanoparticles-and-carbon-nanotubes-7-2 >.
UNIVERSITY, MICHAEL. "Adsorption Of Rhodamine B And Malachite Green From Aqueous Solutions Onto Nanocomposites Composed Of Biomass, Silver Nanoparticles And Carbon Nanotubes" Repository.mouau.edu.ng (2023). Accessed 12 May. 2024. https://repository.mouau.edu.ng/work/view/adsorption-of-rhodamine-b-and-malachite-green-from-aqueous-solutions-onto-nanocomposites-composed-of-biomass-silver-nanoparticles-and-carbon-nanotubes-7-2