Biosorption of Remazol Brilliant Blue R dye onto chemically modified and unmodified Yarrowia lipolytica biomass

Abstract

Remazol Brilliant Blue R (RBBR) is a widely used carcinogenic and toxic dye. This study focused on RBBR dye from aqueous solution using potassium permanganate, cetyltrimethylammonium bromide (CTAB) modified, and unmodified Yarrowia lipolytica biomass as biosorbent. RBBR dye biosorption studies were carried out as a function of pH, initial dye concentration, biosorbent dose, contact time, and temperature. The pH of the aqueous solution strongly influenced the biosorption percent of RBBR dye. The highest dye biosorption capacity yield was obtained at pH 2-3 as well as above pH 3, very low yield biosorption of RBBR was observed. No differences were found between chemically modified and unmodified biomass in terms of RBBR dye biosorption capacity. In the first 15 min, almost 50% RBBR dye was removed from the solution and reached equilibrium within,180 min at pH 2. Biosorption isotherm obeyed Langmuir isotherm model and pseudo-secondorder kinetic model.

Synthesis of novel chitosan Schiff base and its ZnO nanocomposite for removal of synthetic dye, antimicrobial, and cytotoxicity activity

“…4 RBBR dye is commonly used in the textile industries, also utilized as a starting material for synthesis of polymeric materials which are highly poisonous, carcinogenic, and harmful to aquatic creatures. 5 Therefore, treatments of dyes waste before discharging it into surface water is an environmentally important.…”

“…Journal of Bioactive and Compatible Polymers 37(5) Scheme 1. Preparation of 4-(2-Hydroxyaniline)pent-3-en-2-one (2-HyA), chitosan Schiff base (2-HyA-CS) and its nanocomposite (2-HyA-CS/ZnO).…”