Adsorption Studies on the Removal ofCr(ii), Pb(ii) and Cd(vi) ions from Aqueous Solution Using an Agricultural wastes:- Odo Israel O.
Abstract
The removal of Pb(ii), Cd(ii) and Cr(vi) ions
from aqueous solutions using blend of elephant grass and local sponge was
studied using batch adsorption process. Reaction conditions such as the effect
ofparticle size, adsorbent dosage, pH, contact time, initial metal ion
concentration and temperature were evaluated. The results obtained indicated
that the adsorption rates ofthe metal ions decreased with increase in particle
size ofthe adsorbent. The amount ofmetal ions adsorbed increased with increase
in dosage of adsorbent. The adsorption process was found to be pH dependent and
the results obtained indicated that the optimum pH for the sorption of Pb(ii),
Cd(ii) and Cr(vi) was 6.0. The rate ofadsorption was also found to increase
with increase in the contact time. Application of pseudo-first and
pseudo-second order model as well as intraparticle diffusion model to the
adsorption data indicated that these models were obeyed. Adsorption characteristics
of the adsorbent were investigated by fitting data into different equilibrium
adsorption models viz: Langmuir, Freundlich, Flory-Huggins and
DubininRadushkevich models. Dubinin-Radushkevich adsorption model best describe
the adsorption data. Hence the mechanism of physical adsorption was favoured.
Also thermodynamic considerations indicated that the adsorption progresses with
increasing degree oforderliness.
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ISRAEL, O (2023). Adsorption Studies on the Removal ofCr(ii), Pb(ii) and Cd(vi) ions from Aqueous Solution Using an Agricultural wastes:- Odo Israel O.. Repository.mouau.edu.ng: Retrieved May 03, 2024, from https://repository.mouau.edu.ng/work/view/adsorption-studies-on-the-removal-ofcrii-pbii-and-cdvi-ions-from-aqueous-solution-using-an-agricultural-wastes-odo-israel-o-7-2
ONYEKACHI, ISRAEL. "Adsorption Studies on the Removal ofCr(ii), Pb(ii) and Cd(vi) ions from Aqueous Solution Using an Agricultural wastes:- Odo Israel O." Repository.mouau.edu.ng. Repository.mouau.edu.ng, 12 Dec. 2023, https://repository.mouau.edu.ng/work/view/adsorption-studies-on-the-removal-ofcrii-pbii-and-cdvi-ions-from-aqueous-solution-using-an-agricultural-wastes-odo-israel-o-7-2. Accessed 03 May. 2024.
ONYEKACHI, ISRAEL. "Adsorption Studies on the Removal ofCr(ii), Pb(ii) and Cd(vi) ions from Aqueous Solution Using an Agricultural wastes:- Odo Israel O.". Repository.mouau.edu.ng, Repository.mouau.edu.ng, 12 Dec. 2023. Web. 03 May. 2024. < https://repository.mouau.edu.ng/work/view/adsorption-studies-on-the-removal-ofcrii-pbii-and-cdvi-ions-from-aqueous-solution-using-an-agricultural-wastes-odo-israel-o-7-2 >.
ONYEKACHI, ISRAEL. "Adsorption Studies on the Removal ofCr(ii), Pb(ii) and Cd(vi) ions from Aqueous Solution Using an Agricultural wastes:- Odo Israel O." Repository.mouau.edu.ng (2023). Accessed 03 May. 2024. https://repository.mouau.edu.ng/work/view/adsorption-studies-on-the-removal-ofcrii-pbii-and-cdvi-ions-from-aqueous-solution-using-an-agricultural-wastes-odo-israel-o-7-2