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氮、硫共掺杂磁性甘蔗渣生物炭的制备及其对四环素的吸附特性

Preparation of N,S-codoped magnetic bagasse biochar and adsorption characteristics for tetracycline.

作者信息

Junfeng Wu, Bowen Hou, Xiaoqing Wang, Zuwen Liu, Zhaodong Wang, Biao Liu, Songya Li, Hongbin Gao, Xinfeng Zhu, Yanli Mao

机构信息

Henan Key Laboratory of Water Pollution Control and Rehabilitation Technology, Henan University of Urban Construction Pingdingshan 467036 China.

School of Architectural and Surveying & Mapping Engineering, Jiangxi University of Science and Technology Ganzhou 341000 China

出版信息

RSC Adv. 2022 Apr 19;12(19):11786-11795. doi: 10.1039/d1ra08404f. eCollection 2022 Apr 13.

DOI:10.1039/d1ra08404f
PMID:35481070
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9016741/
Abstract

Agricultural waste disposal and purification of polluted water are always the key issues of environmental restoration. In this work, thiourea-functionalized magnetic bagasse biochar (MFeBC) was prepared for tetracycline (TC) removal from aqueous solutions. Firstly, MFeBC was prepared by a combined impregnation and chemical coprecipitation method. Furthermore, MFeBC was characterized by Brunauer-Emmett-Teller surface area analysis, Fourier transform infrared spectrometry, X-ray diffraction analysis, scanning electron microscopy, X-ray photoelectron spectroscopy and the magnetic hysteresis curves. For the TC adsorption, the effects of different solution pH level, adsorbent dosage, initial TC concentration and temperature on the adsorption performance were studied respectively. Moreover, the results indicated that the Freundlich isotherm models appropriately described the adsorption process. The kinetic data were better fitted by the pseudo-second-order kinetic model. The maximum TC adsorption capacity of MFeBC reached 69.26 mg g. Hydrogen bonding and Π-Π interactions played a dominant role in the adsorption process. Therefore, MFeBC can be used as an effective adsorbent for tetracycline removal from aqueous solution.

摘要

农业废弃物处理和污水净化一直是环境修复的关键问题。在本研究中，制备了硫脲功能化磁性甘蔗渣生物炭（MFeBC）用于去除水溶液中的四环素（TC）。首先，通过浸渍和化学共沉淀法制备了MFeBC。此外，采用布鲁诺尔-埃米特-特勒比表面积分析、傅里叶变换红外光谱、X射线衍射分析、扫描电子显微镜、X射线光电子能谱和磁滞曲线对MFeBC进行了表征。对于TC吸附，分别研究了不同溶液pH值、吸附剂用量、初始TC浓度和温度对吸附性能的影响。此外，结果表明弗伦德利希等温线模型能较好地描述吸附过程。动力学数据用伪二级动力学模型拟合效果更好。MFeBC对TC的最大吸附容量达到69.26 mg/g。氢键和Π-Π相互作用在吸附过程中起主导作用。因此，MFeBC可作为从水溶液中去除四环素的有效吸附剂。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9157/9016741/e02c37549d17/d1ra08404f-f10.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9157/9016741/71ee6acb0d2d/d1ra08404f-f5.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9157/9016741/240b0211e74a/d1ra08404f-f8.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9157/9016741/c7b6cd67fba2/d1ra08404f-f9.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9157/9016741/e02c37549d17/d1ra08404f-f10.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9157/9016741/6669e4ac0620/d1ra08404f-f1.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9157/9016741/1ce2255e8102/d1ra08404f-f3.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9157/9016741/71ee6acb0d2d/d1ra08404f-f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9157/9016741/432aa6959561/d1ra08404f-f6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9157/9016741/79eeca6c5d45/d1ra08404f-f7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9157/9016741/240b0211e74a/d1ra08404f-f8.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9157/9016741/c7b6cd67fba2/d1ra08404f-f9.jpg
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