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VOL. 10, ISSUE 1 (2024)
Simultaneous adsorptive removal of Pb2+, Cu2+ and phenol from wastewater: Kinetics and equilibrium behavior
Authors
Agbale N R, Agarry S E, Ogunleye O O, Arinkoola A O
Abstract
Wastewater is oftentimes, a cocktail of
pollutants that need to be simultaneously removed at optimal efficiencies. In
this study, novel green tri-composites biochar (T-BC) of kaolin, plantain
pseudo stem and snail shell were synthesized at 500, 600 and 700 oC
for the simultaneous adsorption of Pb2+, Cu2+ and phenol.
The T-BC at 500 oC performed best, and was employed in further
studies of the adsorption efficiencies. The pseudo first order model gave the
best fit for the kinetic data of phenol, while those of Pb2+ and Cu2+
were best fitted to the pseudo second-order model in the multi-polluted system
(MPS). The MPS equilibrium data for Pb2+ was well correlated to the
modified competitive Langmuir and Langmuir models, the non-modified competitive
Langmuir and Freundlich gave good fits for the data of Cu2+ and the
Sheindorf–Rebuhn–Sheintuch (SRS) model and Freundlich models gave the best fit
for the adsorption of phenol. The Freundlich model gave the best correlation
for the adsorption of Pb2+, Cu2+ and phenol in the single
polluted system. The maximum adsorption capacities in the MPS were 25.22, 98.69
and 151.45mg/g; 382.84, 627.95 and 225.19 mg/g; and 382.82, 1449.21 and 8503.28
mg/g for Pb2+. Cu2+ and phenol respectively using the
Langmuir, MCL and NMCL isotherms. The presence of pollutants resulted in the
synergy of the adsorption process. The adsorption process was endothermic,
spontaneous and feasible for all of the pollutants at 25, 35 and 45 oC.
The T-BC showed great potential for the adsorption of HMS and organics.
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Pages:6-13
How to cite this article:
Agbale N R, Agarry S E, Ogunleye O O, Arinkoola A O "Simultaneous adsorptive removal of Pb2+, Cu2+ and phenol from wastewater: Kinetics and equilibrium behavior". International Journal of Research in Advanced Engineering and Technology, Vol 10, Issue 1, 2024, Pages 6-13
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