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首页> 外文期刊>Journal of Chemical Technology & Biotechnology >Preparation of poly (acrylic acid) containing core-shell type resin for removal of basic dyes
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Preparation of poly (acrylic acid) containing core-shell type resin for removal of basic dyes

机译：制备用于去除碱性染料的含核-壳型树脂的聚丙烯酸

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BACKGROUND: A core-shell type carboxylic acid modified resin was prepared and dye sorption characteristics of the resin were investigated. The resulting grafted resin material has been shown to be an efficient sorbent for removal of basic dyes from water as a result of the carboxylic acid group's affinity towards basic dye molecules. RESULTS: The resin was characterized using Fourier transform infrared spectroscopy (FT-IR) and titrimetric methods. The basic dyes (methylene blue and crystal violet) were removed by contacting the swollen resin with aqueous dye solutions at room temperature. The adsorption capacities of resin were determined by colorimetric analysis of the residual dye content in the adsorption medium, which gave capacities for methylene blue and crystal violet of 300 and 250 mg g~(-1) resin, respectively. The prepared resin is also able to remove basic dyes completely from dilute aqueous dye solutions. Batch kinetic sorption experiments determined that a pseudo-second-order rate kinetic model was applicable. CONCLUSION: Flexibility of the polymer side chains is expected to provide pseudo-homogeneous reaction conditions and easy accessibility of the functional groups involved. The adsorbents are expected to have the advantage of mobility of the grafted chains in the removal of basic dyes from aqueous mixtures. The resin has potential as an adsorbent for removal of basic dyes for use over a wide pH range.
机译：背景：制备了核-壳型羧酸改性树脂，并研究了该树脂的染料吸附特性。由于羧酸基团对碱性染料分子的亲和力，所得的接枝树脂材料已显示出是从水中去除碱性染料的有效吸附剂。结果：使用傅里叶变换红外光谱（FT-IR）和滴定法对树脂进行了表征。通过在室温下使溶胀的树脂与染料水溶液接触，可以除去碱性染料（亚甲基蓝和结晶紫）。通过比色分析吸附介质中的残留染料含量来确定树脂的吸附容量，分别得到亚甲基蓝和结晶紫的容量分别为300和250 mg g〜（-1）树脂。所制备的树脂还能够从稀染料水溶液中完全除去碱性染料。批动力学吸附实验确定伪二级速率动力学模型是适用的。结论：聚合物侧链的柔韧性有望提供假均质的反应条件，并易于接近所涉及的官能团。预期吸附剂在从水性混合物中除去碱性染料方面具有接枝链移动性的优点。该树脂具有作为吸附剂的潜力，可用于在宽pH范围内去除碱性染料。

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