Methyl violet 2B dye is a major contaminant that detrimental to both humans and aquatic microorganisms, thus it should be eliminated from water. In the current investigation, biosorption of methyl onto brown seaweed Cystoseira tamariscifolia biomass as sustainable low-cost biosorbent was examined by varying parameters. Biomass dosage 7 g/L, pH 6, temperature 45 °C, 60 min contact time, 30 mg/L ...