Development of a Fully Bio-based, Higly Efficient Polymeric Adsorbent Via UV Curing for Removal of Cationic Dyes

Abstract

Water contamination from organic pollutants like dyes is a major environmental issue. The current study focused on the synthesis and use of a novel polymeric adsorbent from fully bio-based raw materials. UV curing, an eco-friendly synthesis process, was applied to achieve it. The polymer was then analyzed utilizing various techniques. The dye adsorption capacity of the adsorbent was measured by methyl violet removal, a dangerous organic water pollutant. The study also tested how temperature, pH, initial methyl violet concentrations, and contact time affect MV adsorptive clearance. The study examined kinetics using pseudo-first-order, pseudo-second-order, and intraparticle-diffusion models in which the pseudo-second-order model is the best mechanism. This adsorbent was tested for methyl violet dye removal. The maximum adsorption capacity was observed at 200 mg/L starting concentration, 298 K to 328 K temperature range, 30 min contact time (t), and 3 g/L adsorbent concentration. The comparable adsorption capacities were 58.82 mg/g, 60.97 mg/g, 61.34 mg/g, and 62.89 mg/g at 298 K, 308 K, 318 K, and 328 K, respectively. After examining several isotherm models, the Freundlich model was chosen. This model better describes spontaneous adsorption than the Langmuir, Tempkin, and Elovich models. MV adsorption is spontaneous and endothermic, according to thermodynamic studies. The bio-based polymer’s extensive examination shows its promise for water filtering.

Graphical Abstract