Isothermal and Kinetic Study of the Adsorption
of Tetracycline Hydrochloride and
Sulphamethoxazole by Bottom Ash and Alkali
treated Bottom Ash

Dr. Lisha Kurup*

The two forms of Bottom Ash used for the adsorption of Tetracycline

Hydrochloride and Sulphamethoxazole are Bottom Ash (BA)

activated at 600 °C and activated (at 600 °C) Alkali treated Bottom

Ash (ABA). Langmuir isotherm shows greater sorption capacity of

ABA for Tetracycline Hydrochloride and Sulphamethoxazole than

Bottom Ash. The thermodynamic parameters evaluated show that

the adsorption of Tetracycline Hydrochloride on the two adsorbents

is endothermic in nature whereas adsorption of Sulphamethoxazole

shows exothermic nature. Dubinin Radushkevich isotherm was

used to estimate sorption energy. Kinetic studies reveal that the

processes in all the cases follow Ho Mckay’s pseudo second order

reaction. The studies of mass transfer coefficient for Tetracycline

Hydrochloride and Sulphamethoxazole adsorption over ABA was

higher than BA which suggests that ion-exchange reaction occurs