Abstract:
The adsorbent fly ash-clay composite was
tested for the treatment of automobile service station
wastewater. Batch experiments were conducted to
establish the adsorption column parameters which were
optimum fly ash to clay ratio, kinetic data and adsorption
isotherms. 2:1 fly ash to clay ratio was obtained with the
highest adsorption capacity. Adsorption kinetics were best
fitted into Pseudo second-order kinetic model giving a
theoretical adsorption capacity of 156.25mg/g.
Equilibrium kinetics data were fitted into Langmuir,
Freundlich, Temkin and Dubinin-Radushkevich
adsorption isotherms. Experimental data were best fitted
to Langmuir adsorption isotherm showing a favorable
adsorption.
