Kurdistan University of Medical Sciences Journal of Advances in Environmental Health Research 2676-3478 1 1 2013 01 01 Effect of Azolla filiculoides on removal of reactive red 198 in aqueous solution 44 50 40124 10.22102/jaehr.2013.40124 EN Mohammad-Ali Zazouli Department of Environmental Health Engineering, School of Health and Health Sciences Research Center, Mazandaran University of Medical Sciences, Sari, Iran Davoud Balarak Student Research Committee, Department of Environmental Health, School of Health, Mazandaran University of Medical Sciences, Sari, Iran 0000-0003-3679-9726 Yusef Mahdavi Student Research Committee, Department of Environmental Health, School of Health, Mazandaran University of Medical Sciences, Sari, Iran Journal Article 2013 04 19 The textile dyes are considered as major environmental problems. The dyes can be removed by various methods. Therefore, this study aimed to evaluate the adsorption rate of Reactive Red 198 (RR198) from aqueous solution by activated Azolla filiculoides. This was an empirical-lab study. The Azolla was used as an adsorbent to remove Reactive Red 198 dye. The effect of various parameters was investigated on adsorbent performance and the adsorption isotherms were determined. The dye concentration was measured by spectrophotometer (DR4000) in λmax = 518 nm. The results indicated that A. filiculoides biosorbent had a large specific surface area (36 m2/g). Using the Langmuir equation, the biosorption capacity (qm) for RR198 was 12.2 mg/g. The results showed that the removal ratio of RR198 reached to 97.3% from wastewater containing 10 mg/l RR198. The biomass could be used as a potential biosorbent for the removal of RR198 from industrial wastewater. https://jaehr.muk.ac.ir/article_40124_ddef33a1e82f0e79190e9b09bd1797eb.pdf