Abstract
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-first-order and pseudo-second-order equations. Pseudo-first-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.
Highlights
Undesirable amounts of waste water containing color effluents are released from printing cosmetics, food coloring, dying, textile and papermaking industries [1]
The glycidyl methacrylate (GMA) grafted PE film was functionalized by sulfonation reaction and the reaction was performed at 70°C, 80°C and 90°C at constant heating up to 6 h for the determination of effect of temperature on sulfonation
Economically feasible and reusable sulfonated adsorbent were prepared by radiation grafting and subsequent chemical modification and has been considered for Methylene Blue (MB) adsorption from aqueous solution
Summary
Undesirable amounts of waste water containing color effluents are released from printing cosmetics, food coloring, dying, textile and papermaking industries [1]. Several types of wastewater treatment techniques such as coagulation and flocculation methods [9], electro-coagulation [10] membrane separation [11], oxidation or ozonation [12, 13] and adsorption have been employed to eliminate dyes. Among these techniques, it is seen that for eliminating dyes and other pollutants adsorption is an efficient, lower cost, moderately simple and potentially useful technique [14, 15]. Release of adsorbed MB and once more use of the adsorbent was performed
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