Adsorption of methylene blue malachite green from aqueous solution on the surface of wool carbonizing waste

Abstract EN

With ever increasing environmental pollution problems, the present study was related to the removal of colorants.

Synthetic colorants represented a relatively large group of organic chemicals.

Such chemicals have undesirable effects not only on the environment but also on human beings.

Present study is related with the removal of basic dyes methylene blue and malachite green using wool carbonizing waste materials as adsorbent.

Adsorption of dyes is carried out as a function of temperature, amount of adsorbent, pH and duration.

Spectrophotometric technique was adopted for measuring the extent of adsorption.

The data are fitted in Langmuir and Freundlich isotherm equations and their corresponding constants are calculated.

Thermodynamic study is also carried out by calculating the values of thermodynamic parameters such as, enthalpy change (Δ Ho), free energy change (Δ Go) and entropy change (Δ So).

The values of percent removal and KD for each dye system is also calculated at the range of temperatures ranging from 293-323K with the intervals of 10 oC ± 0.2 oC.