Abstract
Remazol Brilliant Blue R (RBBR) is a widely used carcinogenic and toxic dye. This study focused on RBBR dye removal using chemically modified and unmodified Yarrowia lipolytica biomass. 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 range. It has been found that the adsorption capacity is quite low at higher pH values. No differences were found between chemically modified and unmodified biomass in terms of RBBR dye biosorption capacity. In the first 15min, almost 50% RBBR dye was removed from the solution and reached equilibrium within180 min at pH 2. Biosorption isotherm obeyed Langmuir isotherm model and pseudo-second-order kinetic model.
Highlights
Thousands of synthetic dyes have been developed and used in industrial applications since the first discovery in by William Henry Perkin(Jianlong 2002; Saratale and Chang 2011)
Remazol Brilliant Blue R used in the textile industry and as the starting agent for the manufacture of polymeric materials is highly toxic, carcinogenic, and hazardous to aquatic organisms (Mate and Mishra 2020) The chemical structure of the reactive dyes leads to low biodegradability and recalcitrant characteristics
Previous studies showed that agro-based materials, chitin, peanut hull, algal, and fungal biomass can be used as alternative adsorbents for removing unwanted substances from aqueous solutions (GONG et al 2005; Luo 2006; Xiong et al 2010; Mohamed et al 2015; Ayub et al 2019)
Summary
Thousands of synthetic dyes have been developed and used in industrial applications since the first discovery in by William Henry Perkin(Jianlong 2002; Saratale and Chang 2011). Remazol Brilliant Blue R used in the textile industry and as the starting agent for the manufacture of polymeric materials is highly toxic, carcinogenic, and hazardous to aquatic organisms (Mate and Mishra 2020) The chemical structure of the reactive dyes leads to low biodegradability and recalcitrant characteristics. Researchers have focused on finding novel and efficient adsorbents In this regard, previous studies showed that agro-based materials, chitin, peanut hull, algal, and fungal biomass can be used as alternative adsorbents for removing unwanted substances from aqueous solutions (GONG et al.2005; Luo 2006; Xiong et al 2010; Mohamed et al 2015; Ayub et al 2019). We think it is important to demonstrate the use of biomass obtained from this yeast, which has a wide range of industrial applications, in removing environmental pollutants. In this study, chemically modified and unmodified yeast biomass was investigated in terms of RBBR biosorption capabilities
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