Adsorption Rate of ۱۹۸ Reactive Red Dye from Aqueous Solutions by using Activated Red Mud

Backgroud and purpose: Dye is one of the problems of industrial effluent such as textile industries. The dyes can be removed by various methods. Therefore, the aim of this study was the evaluation of adsorption rate of reactive red ۱۹۸ from aqueous solution by activated red mud. Materials and methods: This research was a lab study. Activated red mud was used as an adsorbent to remove reactive red ۱۹۸ dye. The effect of various parameters on performance of adsorbent was investigated and the isotherm of adsorption was determined. The dye concentration was measured in wavelength of ۵۱۸ nm by spectrophotometer. Results: The results indicated that the adsorption efficiency reduced by increasing of initial dye concentration. Increasing of contact time and adsorbent dose can lead to increasing of the removal efficiency. The maximum removal efficiency was occurred pH between ۲ to ۳. The data was best fitted on Frandlich and Temkin isotherms. Conclusion: The red mud had a satisfactory quality in dye adsorption. It can be used as effective and inexpensive adsorbents for treatment of textile effluent.

کلیدواژه ها:

Red mud ، Azo dyes ، RR۱۹۸ ، Textile wastewater ، Adsorption