Development of Durian Rind/Polypyrrole Composite and Its Application in Removing of Anionic Dyes

Yan Wang, Zijing Dai, Jiaqi Zha, Wenqing Wei
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Abstract

In this study, polypyrrole (PPy) was introduced into durian rind (DR) by in situ polymerization method to prepare durian rind/polypyrrole (DR/PPy) composite. The resulting material was characterized using scanning electron microscope (SEM), transmission electron microscope (TEM), infrared spectroscopy (IRS), and X-ray diffraction (XRD). Then, the removing performance of the DR/PPy material for anionic dyes was explored. The impact of key variables such as the amount of adsorbent, initial dye concentration, pH, adsorption temperature, and contacting time on the adsorption efficiency was examined. The result disclosed that the adsorption efficiency of DR/PPy for methyl orange, sunset yellow, and amaranth was satisfactory. In pH of 7, initial concentration of 100 μg mL-1, and DR/PPy dosage of 1.5 g L-1, the removal efficiency reached 97.31%, 98.48%, and 98.20%, respectively. The adsorptive kinetics and thermodynamic process were analyzed subsequently. The adsorption of anionic dyes on DR/PPy conforms to the pseudo-second-order kinetic and Langmuir isotherm models with maximum adsorption capacity ( q m , max ) of 193.05, 171.23, and 147.71 mg g-1 for methyl orange, sunset yellow, and amaranth, respectively. Finally, a possible mechanism involved in the adsorption system was put forward. This study implies a reasonable feasibility for the effective utilization of waste to control the pollution.
榴莲皮/聚吡咯复合材料的研制及其在阴离子染料脱除中的应用
本研究采用原位聚合的方法,将聚吡咯(PPy)引入到榴莲皮(DR)中,制备了榴莲皮/聚吡咯(DR/PPy)复合材料。利用扫描电镜(SEM)、透射电镜(TEM)、红外光谱(IRS)和x射线衍射(XRD)对所得材料进行了表征。然后,探讨了DR/PPy材料对阴离子染料的去除性能。考察了吸附剂用量、初始染料浓度、pH、吸附温度、接触时间等关键因素对吸附效率的影响。结果表明,DR/PPy对甲基橙、日落黄和苋菜红的吸附效果较好。在pH = 7、初始浓度为100 μg mL-1、DR/PPy投加量为1.5 g L-1时,去除率分别达到97.31%、98.48%和98.20%。对吸附动力学和热力学过程进行了分析。阴离子染料在DR/PPy上的吸附符合拟二级动力学和Langmuir等温线模型,对甲基橙、落日黄和苋红的最大吸附量(q m, max)分别为193.05、171.23和147.71 mg g-1。最后,提出了吸附体系的可能机理。本研究为有效利用废弃物控制污染提供了合理的可行性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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