Adsorption Acid Red18 Dye using Sargassum Glaucescens Biomass from Aqueous Solutions

Background and purpose: dyes are one of the main pollutants in the various industrialwastewaters. therefore, the aim of this study was to assess the biosorption of acid red 18 dyesfrom aqueous solutions by brown macroalgae biomass “sargassum glaucescens.”materials and methods: this research was a lab study. s. glaucescens was used as an adsorbentto remove acid red 18. the effect of various parameters such as ph, initial dyes concentration,adsorbent dose and equilibrium contact time were evaluated in batch adsorption. the dyeconcentration was measured in the wavelength of 506 nm by spectrophotometer.results: the results showed that the equilibrium time of biosorption was 120 min. increasing ofcontact time and adsorbent dose and initial dye concentration can lead to increasing of theremoval efficiency. the maximum adsorption capacity of the dye was at ph: 6 respectively. itwas found that the data fitted to freundlich better than langmuir isotherms of adsorption model.conclusion: the s. glaucescens biomass had a satisfactory quality in dye adsorption. it can beused as an effective, inexpensive adsorbents for the dye adsorption from textile wastewater orsimilar industries.