en بهداشت محیط زیست Environmental Health پژوهشي Original Article <p>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 198 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 198 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 518 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 2 to 3. 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.</p> Red mud, Azo dyes, RR198, Textile wastewater, Adsorption 36 43 http://jhs.mazums.ac.ir/browse.php?a_code=A-10-25-27&slc_lang=en&sid=1 MA Zazouli 10031947532846003695 10031947532846003695 No Health Sciences Research Center, Mazandaran Univrsity Of Medical Sciences, Sari, Iran D Balarak dbalarak2@gmail.com 10031947532846003696 10031947532846003696 Yes Mazandaran University Of Medical Sciences Y Mahdavi 10031947532846003697 10031947532846003697 No Mazandaran University Of Medical Sciences M Ebrahimi 10031947532846003698 10031947532846003698 No Tabriz University Of Medical Sciences