石墨烯气凝胶和还原石墨烯气凝胶对2,4-滴除草剂和水杨酸的吸附能力

Adsorption Ability of Graphene Aerogel and Reduced Graphene Aerogel toward 2,4-D Herbicide and Salicylic Acid.

作者信息

Kurmysheva Alexandra Yu, Yanushevich Oleg, Krikheli Natella, Kramar Olga, Vedenyapina Marina D, Podrabinnik Pavel, Solís Pinargote Nestor Washington, Smirnov Anton, Kuznetsova Ekaterina, Malyavin Vladislav V, Peretyagin Pavel, Grigoriev Sergey N

机构信息

Laboratory of Electric Current Assisted Sintering Technologies, Moscow State University of Technology "STANKIN", Vadkovsky per. 1, 127055 Moscow, Russia.

Scientific Department, A.I. Yevdokimov Moscow State University of Medicine and Dentistry, Delegatskaya St., 20, p. 1, 127473 Moscow, Russia.

出版信息

Gels. 2023 Aug 23;9(9):680. doi: 10.3390/gels9090680.

DOI:10.3390/gels9090680

PMID:37754362

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10529785/

Abstract

Within this work, new aerogels based on graphene oxide are proposed to adsorb salicylic acid (SA) and herbicide 2,4-Dichlorophenoxyacetic acid (2,4-D) from aqueous media. Graphene oxide aerogel (GOA) and reduced graphene oxide aerogel (rGOA) were obtained by freeze-drying processes and then studied by Raman spectroscopy, Fourier-transform infrared spectroscopy (FT-IR), and Brunauer-Emmett-Teller (BET) analysis. The influence of contact time and the concentration of the adsorbates were also assessed. It was found that equilibrium for high adsorption is reached in 150 min. In a single system, the pseudo-first-order, pseudo-second-order kinetic models, Intraparticle diffusion, and Elovich models were used to discuss the detail of the aerogel adsorbing pollutant. Moreover, the Langmuir, Freundlich, and Temkin adsorption models were applied to describe the equilibrium isotherms and calculate the isotherm constants.

摘要

在这项工作中，提出了基于氧化石墨烯的新型气凝胶，用于从水性介质中吸附水杨酸（SA）和除草剂2,4-二氯苯氧乙酸（2,4-D）。通过冷冻干燥工艺获得了氧化石墨烯气凝胶（GOA）和还原氧化石墨烯气凝胶（rGOA），然后通过拉曼光谱、傅里叶变换红外光谱（FT-IR）和布鲁诺尔-埃米特-泰勒（BET）分析对其进行了研究。还评估了接触时间和吸附质浓度的影响。结果发现，在150分钟内达到了高吸附平衡。在单一体系中，使用伪一级、伪二级动力学模型、颗粒内扩散模型和埃洛维奇模型来详细讨论气凝胶吸附污染物的情况。此外，应用朗缪尔、弗伦德里希和坦金吸附模型来描述平衡等温线并计算等温常数。