The ability of activated carbon which was
produced by chemical activation using zinc chloride from tea
industry wastes (TIWAC) to adsorb phenol molecules from
aqueous solution was tested by equilibrium, kinetic, and
thermodynamic parameters. Phenol adsorption on TIWAC
took place with a high yield at pH values in the range 4 to 8.
The optimum contact period was observed as 4.0 h and from
the adsorption graphs plotted as a function of time; it was
established that phenol adsorption on TIWAC conformed
more to a pseudosecond-order kinetic model. Additionally, it
was determined that the adsorption rate is controlled by
intraparticle diffusion as well as film diffusion. It was
established that phenol adsorption on TIWAC can be better
defined by the Langmuir adsorption model and its adsorption
capacity was 142.9 mg·g
−1
from the linear Langmuir equation. Temperature had an adverse effect on adsorption yield, and hence,
the adsorption process was exothermic in our case. Moreover, increasing electrolyte concentration in the medium has a positive
effect on adsorption yield. From the data obtained, it was concluded that the removal of phenol from aqueous solution by
TIWAC produced from tea industry wastes with a very low cost took place with an extremely high performance.
The ability of activated carbon which was
produced by chemical activation using zinc chloride from tea
industry wastes (TIWAC) to adsorb phenol molecules from
aqueous solution was tested by equilibrium, kinetic, and
thermodynamic parameters. Phenol adsorption on TIWAC
took place with a high yield at pH values in the range 4 to 8.
The optimum contact period was observed as 4.0 h and from
the adsorption graphs plotted as a function of time; it was
established that phenol adsorption on TIWAC conformed
more to a pseudosecond-order kinetic model. Additionally, it
was determined that the adsorption rate is controlled by
intraparticle diffusion as well as film diffusion. It was
established that phenol adsorption on TIWAC can be better
defined by the Langmuir adsorption model and its adsorption
capacity was 142.9 mg·g
−1
from the linear Langmuir equation. Temperature had an adverse effect on adsorption yield, and hence,
the adsorption process was exothermic in our case. Moreover, increasing electrolyte concentration in the medium has a positive
effect on adsorption yield. From the data obtained, it was concluded that the removal of phenol from aqueous solution by
TIWAC produced from tea industry wastes with a very low cost took place with an extremely high performance.
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