Adsorption Ofrhodamine B And Malachite Green From Aqueous Solutions Onto Nano-Composites Composed Of Biomass, Silver Nanoparticles And Carbon Nanotubes:- Mbuko, Candid O
ABSTRACT
Nanocomposites adsorbents were fabricated from
different types of plant biomass and functionalized multiwailed carbon
nanotubes decorated with silver nanoparticles (Ag//- 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 (AG°, AH° and AS0) ofthe 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 Kg/fMWCNTs 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.
0.0
CANDID, O (2025). Adsorption Ofrhodamine B And Malachite Green From Aqueous Solutions Onto Nano-Composites Composed Of Biomass, Silver Nanoparticles And Carbon Nanotubes:- Mbuko, Candid O. Repository.mouau.edu.ng: Retrieved Jul 31, 2025, from https://repository.mouau.edu.ng/work/view/adsorption-ofrhodamine-b-and-malachite-green-from-aqueous-solutions-onto-nano-composites-composed-of-biomass-silver-nanoparticles-and-carbon-nanotubes-mbuko-candid-o-7-2
OKEZIE, CANDID. "Adsorption Ofrhodamine B And Malachite Green From Aqueous Solutions Onto Nano-Composites Composed Of Biomass, Silver Nanoparticles And Carbon Nanotubes:- Mbuko, Candid O" Repository.mouau.edu.ng. Repository.mouau.edu.ng, 29 Jul. 2025, https://repository.mouau.edu.ng/work/view/adsorption-ofrhodamine-b-and-malachite-green-from-aqueous-solutions-onto-nano-composites-composed-of-biomass-silver-nanoparticles-and-carbon-nanotubes-mbuko-candid-o-7-2. Accessed 31 Jul. 2025.
OKEZIE, CANDID. "Adsorption Ofrhodamine B And Malachite Green From Aqueous Solutions Onto Nano-Composites Composed Of Biomass, Silver Nanoparticles And Carbon Nanotubes:- Mbuko, Candid O". Repository.mouau.edu.ng, Repository.mouau.edu.ng, 29 Jul. 2025. Web. 31 Jul. 2025. < https://repository.mouau.edu.ng/work/view/adsorption-ofrhodamine-b-and-malachite-green-from-aqueous-solutions-onto-nano-composites-composed-of-biomass-silver-nanoparticles-and-carbon-nanotubes-mbuko-candid-o-7-2 >.
OKEZIE, CANDID. "Adsorption Ofrhodamine B And Malachite Green From Aqueous Solutions Onto Nano-Composites Composed Of Biomass, Silver Nanoparticles And Carbon Nanotubes:- Mbuko, Candid O" Repository.mouau.edu.ng (2025). Accessed 31 Jul. 2025. https://repository.mouau.edu.ng/work/view/adsorption-ofrhodamine-b-and-malachite-green-from-aqueous-solutions-onto-nano-composites-composed-of-biomass-silver-nanoparticles-and-carbon-nanotubes-mbuko-candid-o-7-2