农业废弃物合成氧化石墨烯吸附扑热息痛的研究

T. Osobamiro, A. Oladipo
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引用次数: 0

摘要

生产廉价环保的石墨烯材料去除废水中的污染物是可持续水处理的必要条件。在本研究中,研究了利用农业废弃物(橘子皮和棕榈仁壳)制备氧化石墨烯用于吸附水溶液中的扑热息痛。采用改进的Hummer法制备了氧化石墨烯(GO),并用XRD和FTIR对其进行了表征。动力学数据采用拟一阶和拟二阶方程分析,平衡等温线数据采用Langmuir和Freundlich等温线拟合。红外光谱主要显示了含氧官能团的存在,如羟基(OH)和羰基(C=O, C-O),证实了氧化石墨烯的合成。在pH为7、吸附剂剂量为0.4 g、与棕榈仁壳氧化石墨烯接触80分钟的条件下,对乙酰氨基酚水溶液的去除率最高,为76.6。拟二阶模型(R2—gt—0.900)和Freundlich等温线最能描述吸附数据。因此,橘子皮和棕榈仁壳可以作为石墨合成氧化石墨烯的合适的廉价替代品。可以对氧化石墨烯进行改性和进一步净化,以提高其吸附能力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Adsorption Study of Paracetamol with Graphene oxide Synthesized from Agricultural waste
Abstract The production of cheap and eco-friendly graphene material for the removal of contaminants in wastewater is necessary for sustainable water treatment. In this study, the production of graphene oxide from agricultural wastes (rind of orange and palm kernel shell) for the adsorption of paracetamol from aqueous solution was examined. The Graphene Oxides (GO) were produced using modified Hummer method and characterized using XRD and FTIR analyses. The kinetic data were analyzed using the pseudo-first and pseudo-second order equations, while the equilibrium isotherm data were fitted into Langmuir and Freundlich isotherms. FTIR spectral indicated mainly the presence of oxygen containing functional groups such as Hydroxyl group (OH) and Carbonyl group (C=O, C-O) confirming the synthesis of graphene oxide. The highest percentage removal of 76.6 from the aqueous paracetamol solution was established at pH 7, adsorbent dose of 0.4 g and contact time of 80 minutes with graphene oxide from palm kernel shell. The adsorption data was best described by pseudo-second-order model (R2---gt--- 0.900) and Freundlich isotherm. Therefore the rind of orange and palm kernel shell can be suitable cheap alternatives to graphite for the synthesis of GO. Modification and further purification of the GO can be carried out to enhance their adsorption capacities.
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