This is a study focusing on the absorption of anthraquinone dyes represented by the alizarin dye using magnetic iron oxide minutes in an aqueous medium. Several factors affecting the purification process were studied, including: pH, absorption amount, time required for purification, and temperature. After reaching the ideal conditions for purification, the water was purified from alizarin dye by 95%. It was found that the ideal conditions for purification and balance condition were at pH 11 and the time required was one hour. It was found that the adsorption process corresponds well with the Langmuir model, which proves that the adsorption is a single and homogeneous layer on the absorbent surface. The maximum absorption capacity of the alizarin dye adsorption was 23.2 mg dye per g of the absorbent at pH 11. In addition, the dynamics of the adsorption process were shown to be exothermic and automatic at room temperature. From a study of Gibbs free energy (∆G ° = -6.79 kJ / mol), it appears that the absorption process is physical. From experiments with catalytic reuse, compared to the use of sodium hydroxide and nitric acid, it was found that it can be reused four times with nitric acid with an efficiency of up to 80%. The catalytic properties of the absorbent have been confirmed by using it to purify the water contaminated with the alizarin dye and expose it to ultraviolet radiation. It was found that these rays improve the efficiency of the absorber without affecting its catalytic and magnetic properties. Finally, the mechanism of absorption was studied and its nature understood.

العنوان

Separation Science and Technology

الناشر

TAYLOR & FRANCIS

بلد الناشر

الولايات المتحدة الأمريكية

Indexing

Scopus

معامل التأثير

2,475

نوع المنشور

Both (Printed and Online)

المجلد

55

السنة

2020

الصفحات

16