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首页> 外文期刊>Journal of Polymers and the Environment >Preparation and Characterization of Gamma Radiation Assisted Poly-Vinyl Alcohol/Acrylic Acid/Poly-4-Styrene Sulphonic Acid Based Hydrogel: Application for Textile Dye Removal
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Preparation and Characterization of Gamma Radiation Assisted Poly-Vinyl Alcohol/Acrylic Acid/Poly-4-Styrene Sulphonic Acid Based Hydrogel: Application for Textile Dye Removal

机译：γ辐射辅助聚乙烯醇/丙烯酸/聚 - 4-苯乙烯磺酸水凝胶的制备与表征：纺织染料施用

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In this study, poly-vinyl alcohol (PVA), acrylic acid (AAc), and poly-4-styrene sulphonic acid (PSSa) were copolymerized in different compositions using gamma irradiation to form the hydrogel. FTIR study showed that AAc act as a crosslinker for the formation of transparent hydrogel and optimization study affirmed that crosslinking density increased with the increase of AAc content. The swelling study revealed that hydrogel with 30% acrylic acid and 70% PSSa (PAC(30)PS(70)) exhibited the best swelling properties with a maximum diffusion coefficient of 2.94 cm(2)s(-1)and the diffusion of water inside the hydrogel was found to be of Fickian character. Methylene blue was used as a model dye for sorption and the effect of sorbent dosage, contact time, initial dye concentration, pH, and temperature on sorption were observed for the study. The maximum sorption capacity of 131.58 mg/g was observed at normal temperature, neutral pH, and hydrogel dosage of 0.05 grams (g). The sorption of dye data best fitted with pseudo first-order kinetic equation and Boyd kinetic plot indicates that the adsorption process was controlled by film diffusion (external diffusion). The negative values of Delta H (- 18.57 kjmol(-1)) from the thermodynamics study, confirmed that the adsorption process was exothermic and more favorable at lower temperature. The reusability study specified that the sorption capacity gets reduced from 90.96 to 57.45% after four consecutive cycles ensuring that the hydrogel can be effectively utilized as recyclable adsorbents for industrial applications.
机译：在该研究中，使用γ辐射以形成水凝胶的不同组合物共聚聚 - 乙烯醇（PVA），丙烯酸（AAC）和聚-4-苯乙烯磺酸（PSSA）。 FTIR的研究表明，AAC作为形成透明水凝胶的交联剂，优化研究肯定了交联密度随着AAC含量的增加而增加。膨胀研究表明，具有30％丙烯酸和70％PSSA（PAC（30）PS（70））的水凝胶表现出最佳的溶胀性能，最大扩散系数为2.94cm（2）s（-1）和扩散发现水凝胶内的水是Fickian的性格。将亚甲基蓝色用作吸附的模型染料和吸附剂剂量，接触时间，初始染料浓度，pH和对研究的效果的影响。在常温，中性pH和水凝胶剂量为0.05克（G）的常温下观察到131.58mg / g的最大吸收能力。最佳配备有伪第一阶动力学方程和Boyd动力学图的染料数据的吸附表明吸附过程由薄膜扩散（外部扩散）控制。来自热力学研究的Delta H（ - 18.57 kJmol（-1））的负值证实，吸附过程在较低温度下放热和更有利。可重用性研究规定，四个连续循环后，吸附能力从90.96降至57.45％，确保水凝胶可有效地用作工业应用的可回收吸附剂。

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