batch removal of acid blue 292 by biosorption onto lemna minor: equilibrium and kinetic studies

background: recently, there has been a great concern about the consumption of dyes because of their toxicity, mutagenicity, carcinogenicity, and persistence in the aquatic environment. therefore aim of this study were determining the feasibility of using lemna minor in removing acid blue 292 (ab292) dye from aqueous solution and determining the optimal conditions. methods: this experimental study was conducted in the batch systems and to investigate effects of parameters such as contact time, initial concentration of dye, ph and lemna minor biomass dose. isotherms and kenti  were determined by using equiliberium data. results: according to the results, a maximum removal efficiency of 98.5% was obtained at ph of 3 and the reaction time of 90 min; initial dye concentration 10 mg/l and adsorbent dose 3g/l. the adsorption data was best fitted to the freundlich isotherm and pseudo-second order kinetic model. conclusions: the results showed that lemna minor could be used as a cost-effective adsorbent for removing ab292 dye from textile wastewater efficiently.