Application of Sulfonated GMA-g-non Woven PE Fabric for the Efficient Removal of Methylene Blue Dye from Wastewater

摘要

An environmental affable, economically feasible and reusable sulfonated adsorbent were constructed by gamma radiation grafting of glycidyl methacrylate (GMA) on non-woven polyethylene fabric and subsequent chemical modification. Highest graft yield of 343.31% was obtained at favourable conditions: 30 kGy radiation dose, 5% monomer concentration, adding up of 0.5% Tween-20 as an additive, 4 h reaction time. The epoxide group containing GMA-g-PE film were functionalized through sulfonation. The adsorbent was identified by Fourier Transform Infrared (FTIR), Scanning Electron Microscopy (SEM) and Thermo-gravimetric Analysis (TGA). The aqueous solutions of methylene blue were prepared in various concentrations and adsorption behavior by the developed sulfonated-GMA-g-PE film were investigated. MB uptake capacity at different environment such as contact time, pH and initial MB concentration were identified. The adsorption of MB is highly pH dependent and utmost sorption was found at pH 7. The kinetic adsorption data were interpreted by pseudo-?rst-order and pseudo-second-order equations. Pseudo-?rst-order rate kinetic model is more applicable for the sorption process due to its higher correlation coefficient. From the two isotherm model Langmuir and Fruendlich, Fruendlich model attuned best with the MB sorption as presented by higher correlation coefficient. The MB uptake capacity of the sorbent obtained from Langmuir model was 500 mg/g. Futhermore, the adsorbent could be reformed and reused repeatedly for the sorption of MB from waste water.