Authors :
Anyanwuocha, E. C; Nweke, C. O.; Orji, J. C; Asiwe, E. S
Volume/Issue :
Volume 7 - 2022, Issue 7 - July
Google Scholar :
https://bit.ly/3IIfn9N
Scribd :
https://bit.ly/3cO05qc
DOI :
https://doi.org/10.5281/zenodo.7057643
Abstract :
The present study investigated the adsorption
characteristics, diffusion, and Isotherms of modified pig
Waste for removing Reactive Violet 5 (RV5). Pig wastes
were subjected to chemical modification by Triton X100
(TX100) and 1% sodium dodecyl sulphate (SDS)
treatment. The effect of some significant parameters
such as pH, time, and dye concentration on the
adsorption capacity of the studied systems was
determined using standard methods. The pseudo-secondorder, intra-particle diffusion, Elovich, and power
function kinetic equation models were used to examine
the rate of the adsorption process; while the equilibrium
data were fitted to adsorption isotherm models;
Langmuir, Freundlich, Redlich-Peterson, and Sips
models. The maximum RV5 removal capacity for each of
the adsorbents was found to be at pH 1 and decreased
with increasing pH, and equilibrium time was found to
be 80mins for different adsorbent materials, and the
adsorption capacity at the equilibrium time was 45%,
48%, and 70% for untreated, TX100 and SDS treated
PGD. The results obtained closely fitted into the
intraparticle diffusion linear kinetic model with a nonzero y-axis intercept and correlation coefficients (R2
)
values of 0.999 for the absorbents; indicative of a multipath diffusion mechanism being involved in the
adsorption of RV5 by treated and untreated PGD. The
adsorption of RV5 by PGD treated with SDS and TX100
strongly aligned with a linearized Freundlich Isotherm
for the effect of dye concentration on adsorption
capacity; with correlation coefficient (R2
) of 0.968 and
0.937 for the PGD treated with SDS and TX100
respectively. Therefore, PGD treated with SDS may be
efficiently used as an adsorbent for the removal of RV5
from aqueous solutions. The adsorption of SDS and
TX100 treated PGD tightly fitted into pseudo-secondorder, power function, and Elovich non-linear kinetic
models and a heterogeneous multi-path diffusion
mechanism
Keywords :
Reactive Violet 5, Agricultural waste, modified pig waste, Adsorption isotherms and kinetics.
The present study investigated the adsorption
characteristics, diffusion, and Isotherms of modified pig
Waste for removing Reactive Violet 5 (RV5). Pig wastes
were subjected to chemical modification by Triton X100
(TX100) and 1% sodium dodecyl sulphate (SDS)
treatment. The effect of some significant parameters
such as pH, time, and dye concentration on the
adsorption capacity of the studied systems was
determined using standard methods. The pseudo-secondorder, intra-particle diffusion, Elovich, and power
function kinetic equation models were used to examine
the rate of the adsorption process; while the equilibrium
data were fitted to adsorption isotherm models;
Langmuir, Freundlich, Redlich-Peterson, and Sips
models. The maximum RV5 removal capacity for each of
the adsorbents was found to be at pH 1 and decreased
with increasing pH, and equilibrium time was found to
be 80mins for different adsorbent materials, and the
adsorption capacity at the equilibrium time was 45%,
48%, and 70% for untreated, TX100 and SDS treated
PGD. The results obtained closely fitted into the
intraparticle diffusion linear kinetic model with a nonzero y-axis intercept and correlation coefficients (R2
)
values of 0.999 for the absorbents; indicative of a multipath diffusion mechanism being involved in the
adsorption of RV5 by treated and untreated PGD. The
adsorption of RV5 by PGD treated with SDS and TX100
strongly aligned with a linearized Freundlich Isotherm
for the effect of dye concentration on adsorption
capacity; with correlation coefficient (R2
) of 0.968 and
0.937 for the PGD treated with SDS and TX100
respectively. Therefore, PGD treated with SDS may be
efficiently used as an adsorbent for the removal of RV5
from aqueous solutions. The adsorption of SDS and
TX100 treated PGD tightly fitted into pseudo-secondorder, power function, and Elovich non-linear kinetic
models and a heterogeneous multi-path diffusion
mechanism
Keywords :
Reactive Violet 5, Agricultural waste, modified pig waste, Adsorption isotherms and kinetics.
