| 改性生物炭负载纳米零价铁去除水体中头孢噻肟 |
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| 引用本文： | 吴鸿伟,冯启言,杨虹,朱雪强,高波,陈迪,苗亦新. 改性生物炭负载纳米零价铁去除水体中头孢噻肟[J]. 环境科学学报, 2017, 37(7): 2691-2698 |
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| 作者姓名： | 吴鸿伟 冯启言 杨虹 朱雪强 高波 陈迪 苗亦新 |
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| 作者单位： | 1 中国矿业大学环境与测绘学院, 徐州 221116;2 枣庄学院, 化学化工与材料科学学院, 枣庄 277160,中国矿业大学环境与测绘学院, 徐州 221116,中国矿业大学环境与测绘学院, 徐州 221116,中国矿业大学环境与测绘学院, 徐州 221116,中国矿业大学环境与测绘学院, 徐州 221116,中国矿业大学环境与测绘学院, 徐州 221116,中国矿业大学环境与测绘学院, 徐州 221116 |
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| 基金项目： | 国家自然科学基金（No.41472223）；江苏省煤基CO2捕集与地质储存重点实验室项目（No.6AT147802） |
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| 摘 要： | 抗生素对环境的危害已经引起了人们的广泛重视.本实验以改性生物炭(MB)为载体制备了负载纳米零价铁的功能生物炭(Fe/MB).以头孢噻肟(CFX)为目标抗生素,研究了该材料对头孢噻肟的降解特性及影响因素,并探讨了去除机理.实验结果表明,50 min内头孢噻肟的去除率为92%(Fe/MB用量为0.4 g·L~(-1),溶液p H=5.0,头孢噻肟浓度为20 mg·L~(-1),振荡速率为200 r·min~(-1),柠檬酸浓度为1.47 mmol·L~(-1)).头孢噻肟的去除过程存在改性生物炭的吸附和纳米零价铁还原降解的协同作用,数据符合伪二级反应动力学方程(R20.99).采用紫外可见光谱结合质谱分析了降解产物的结构并提出头孢噻肟的降解途径.
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| 关 键 词： | 改性生物炭 纳米零价铁 头孢噻肟 协同作用 降解 |
| 收稿时间： | 2017-01-22 |
| 修稿时间： | 2017-03-07 |
Nanoscale zero valent iron stabilized on modified biochar to remove cefotaxime from aqueous solutions |
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| WU Hongwei,FENG Qiyan,YANG Hong,ZHU Xueqiang,GAO Bo,CHEN Di and MIAO Yixin. Nanoscale zero valent iron stabilized on modified biochar to remove cefotaxime from aqueous solutions[J]. Acta Scientiae Circumstantiae, 2017, 37(7): 2691-2698 |
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| Authors: | WU Hongwei FENG Qiyan YANG Hong ZHU Xueqiang GAO Bo CHEN Di MIAO Yixin |
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| Affiliation: | 1 School of Environmental Science and Spatial Informatics, China University of Mining and Technology, Xuzhou 221116;2 Department of Chemistry, Zaozhuang University, Zaozhuang 277160,School of Environmental Science and Spatial Informatics, China University of Mining and Technology, Xuzhou 221116,School of Environmental Science and Spatial Informatics, China University of Mining and Technology, Xuzhou 221116,School of Environmental Science and Spatial Informatics, China University of Mining and Technology, Xuzhou 221116,School of Environmental Science and Spatial Informatics, China University of Mining and Technology, Xuzhou 221116,School of Environmental Science and Spatial Informatics, China University of Mining and Technology, Xuzhou 221116 and School of Environmental Science and Spatial Informatics, China University of Mining and Technology, Xuzhou 221116 |
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| Abstract: | Environmental problems generated by residual antibiotics have attracted extensive attention. In this work, nanoscale zero valent iron (nZVI) stabilized on modified biochar (Fe/MB) was synthesized. As a typical antibiotic, cefotaxime (CFX) was selected for examining the adsorbent removal efficiency, influencing factors and removal mechanism. The results showed that 92% of CFX was removed by Fe/MB in 50 min (dose: 0.4 g·L-1, CFX initial concentration: 20 mg·L-1, pH: 5.0, stir speed: 200 r·min-1 and citric acid concentration: 1.47 mmol·L-1). Synergetic adsorption (MB) and reduction (nanoscale zero valent iron) occurred in the CFX removal. The data fitted the pseudo-second-order kinetic model well (R2>0.99). To investigate the degradation pathway, degradation products were analyzed by ultraviolet-visible spectrum and mass spectrometry. |
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| Keywords: | modified biochar nanoscale zero valent iron cefotaxime synergistic reaction degradation |
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