Study the Effects Influencing the Adsorption of Toluidine Blue O (TBO) Dye onto MnO2 Surface

Abstract

Abstract
The research included study the adsorption of toluidine blue O (TBO) dye on the surface of
MnO2 which was used as a catalyst in several reactions especially photo reactions. Many of
parameters were studied which affect the a adsorption process such as: weight of
MnO2,equilibrium time,effect of pH and the type of adsorbent. MnO2 was used as a model
adsorbent in the experiments. These experiments were done under room temperature and
showed that the optimum wight of MnO2 was (0.6 g),equilibrium time was (90 min.) while the
best adsorbent was MnO2/ZnO. Also the experiments showed that the (pH=8) was the best
medium of the adsorption process while negative effects- due to acidic and basic mediawere
observed in the adsorption process. Adsorption isotherms and their applications were also
studied such as Freundlich and Langmuir isotherms.