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Adsorption study of lead ions onto sulfur/reduced graphene oxide composite
Chemical Data Collections Pub Date : 2021-02-01 , DOI: 10.1016/j.cdc.2020.100627
Mahsa Moshari , Amin Mehrehjedy , Mahdi Heidari-Golafzania , Mahboubeh Rabbani , Saeed Farhadi

Abstract In this study, reduced graphene oxide modified by sulfur (S/RGO) is synthesized through the green method. S/RGO is used as a catalyst for the elimination of lead ions (Pb2+) through the adsorption. The effects of different parameters on adsorption of lead ions through S/RGO are studied. Those parameters include the amount of adsorbent, pH of the solution, time of adsorption, and initial concentration of Pb+2. The scanning electron microscope (SEM), X-ray Photoelectron Spectroscopy (XPS), and Infrared spectroscopy (IR) are used for the characterization of as-prepared S/RGO samples. The mechanism of removal of lead ions by the new catalyst is also investigated. To study the kinetic aspects of the adsorption of Pb2+ by S/RGO, three different models are used including, pseudo-first-order, pseudo-second-order, and intraparticle diffusion. Both Langmuir and Freundlich isotherms were investigated in our work.

中文翻译:

硫/还原氧化石墨烯复合材料对铅离子的吸附研究

摘要 本研究采用绿色法合成了硫改性还原氧化石墨烯(S/RGO)。S/RGO 用作通过吸附消除铅离子 (Pb2+) 的催化剂。研究了不同参数对S/RGO吸附铅离子的影响。这些参数包括吸附剂的量、溶液的 pH 值、吸附时间和 Pb+2 的初始浓度。扫描电子显微镜 (SEM)、X 射线光电子能谱 (XPS) 和红外光谱 (IR) 用于表征制备的 S/RGO 样品。还研究了新催化剂去除铅离子的机理。为了研究 S/RGO 吸附 Pb2+ 的动力学方面,使用了三种不同的模型,包括伪一级、伪二级和颗粒内扩散。
更新日期:2021-02-01
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