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Porous carbon by microwave assisted pyrolysis: An effective and low-cost adsorbent for sulfamethoxazole adsorption and optimization using response surface methodology
Journal of Cleaner Production ( IF 9.7 ) Pub Date : 2018-08-18 , DOI: 10.1016/j.jclepro.2018.08.155
Mohamed Zbair , Hassan Ait Ahsaine , Zakaria Anfar

In this work, we described a facile synthesis of porous carbon (PCH2O2) using microwave-assisted pyrolysis and hydrogen peroxide as a chemical activator, almond shell was used as a raw source. The synthesized sample (PCH2O2) was used as a highly efficient adsorbent for ultrasound adsorption of antibiotic sulfamethoxazole (SMZ). The PC-H2O2 was characterized using X-Ray photoelectron spectroscopy, Brunauer–Emmett–Teller surface area (BET), X-ray Diffraction (XRD), X-Ray Scanning Electron Microscopy (SEM), Raman Spectroscopy, Fourier transform infrared (FTIR), Fluorescence X and Boehm titration. The PC-H2O2 was found to have a high surface area of 1274 m2/g, which provide a large number of active sites for SMZ molecules. The pseudo-second-order model described the ultrasound-assisted adsorption kinetics data. The isotherms were accurately described by the Langmuir model with a monolayer adsorption capacity of 344.8 mg/g. The adsorption mechanism was proposed based on FTIR analysis before and after ultrasound-assisted adsorption. The reusability of PC-H2O2 loaded SMZ was investigated and Response Surface Methodology was used to optimize the removal efficiency of SMZ.



中文翻译:

微波辅助热解过程中的多孔碳:一种有效且低成本的吸附剂,用于磺胺甲恶唑的吸附和响应面方法的优化

在这项工作中,我们描述了使用微波辅助热解和过氧化氢作为化学活化剂,以杏仁壳为原料,轻松合成多孔碳(PC H 2 O 2)。合成的样品(PC H 2 O 2)被用作高效超声吸附抗生素磺胺甲恶唑(SMZ)的吸附剂。使用X射线光电子能谱,Brunauer-Emmett-Teller表面积(BET),X射线衍射(XRD),X射线扫描电子显微镜(SEM),拉曼光谱,傅里叶变换对PC-H 2 O 2进行表征红外(FTIR),荧光X和Boehm滴定。PC-H 2 O 2据发现,其具有1274 m 2 / g的高表面积,其为SMZ分子提供了大量的活性位点。拟二级模型描述了超声辅助的吸附动力学数据。等温线由Langmuir模型精确描述,单层吸附容量为344.8 mg / g。基于FTIR分析提出了超声辅助吸附前后的吸附机理。研究了PC-H 2 O 2负载SMZ的可重用性,并使用响应表面方法优化了SMZ的去除效率。

更新日期:2018-08-18
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