分类号学号M*********学校代码10487密级
硕士学位论文
困难作文
改性竹炭负载Fe/Cu对废水中
氯霉素去除研究
学位申请人：吴智威
关公面前耍大刀歇后语下一句
学科专业：市政工程
指导教师：吴晓晖副教授
人物剪纸答辩日期：2012.1.12
A Disrtation Submitted in Partial Fulfillment of the Requirements
for the Degree of Master of Engineering
Modified Bamboo Charcoal Loading Fe/Cu to Remove
Chloramphenicol in Wastewater
Candidate : Wu Zhiwei
Major : Municipal Engineering
Supervisor : Associate Prof. Wu Xiaohui
Huazhong University of Science and Technology
Wuhan 430074, P. R. China
January, 2012
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本人声明所呈交的学位论文是我个人在导师指导下进行的研究工作及取得的研究成果。尽我所知，除文中已经标明引用的内容外，本论文不包含任何其他个人或集体已经发表或撰写过的研究成果。对本文的研究做出贡献的个人和集体，均已在文中以明确方式标明。本人完全意识到本声明的法律结果由本人承担。
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华中科技大学硕士学位论文
检查b超摘要
本文采用廉价易得的可再生竹炭吸附剂，通过改性得到有较高吸附量的改性竹炭(Modified Bamboo Charcoal，MBC)。再结合零价铁技术，将纳米Fe/Cu双金属体系负载到改性竹炭表面，得到高效的MBC/Fe/Cu体系。通过研究发现，MBC/Fe/Cu 体系可以对氯霉素进行同步吸附和脱氯降解，大大的提高了氯霉素的去除效率。本实验得出的主要研究成果如下：
（1）普通竹炭、氢氧化钠改性竹炭和乙醇改性竹炭对氯霉素的吸附符合准一级动力学方程，其中乙醇改性法可以提高竹炭的平衡吸附量。三种竹炭对氯霉素的等温吸附可以通过Langmuir方程描述。氮气物理吸附表征发现，两种改性方法都都不同程度的导致了竹炭孔结构的坍塌。但是Boehm滴定、FTIR和XPS等表征发现，两种改性都有效的增加了竹炭表面含氧官能团的含量，从而增加了氯霉素的吸附量。
（2）通过吸附实验，结合材料表征方法，得到了最佳配比的MBC/Fe/Cu的制备方法，其对氯霉素的吸附符合准二级动力学方程。MBC/Fe/Cu对氯霉素的平衡吸附量提高到0.895mg/g，并且半反应时间只需要69.87min。负载双金属不仅加快了反应速率，而且大大提高了去除率。由于Fe/Cu颗粒之间存在磁性作用，在负载时会发生团聚现象，不利于反应的进行。
（3）pH对MBC/Fe/Cu去除氯霉素有着重要的影响，最佳pH范围为4～6。温度对MBC/Fe/Cu去除氯霉素的影响不明显，考虑到实际中反应往往在常温下进行，建议在20～30℃进行即可。在最佳pH和温度下，MBC/Fe/Cu对氯霉素的去除符合Langmuir方程。与负载前相比，负载大大提高了MBC/Fe/Cu体系的去除能力，但是并没有提高体系与氯霉素的吸附结合能力。
关键词：氯霉素废水竹炭改性零价铁技术材料表征
华中科技大学硕士学位论文
Abstract
Low-cost and renewable adsorbent of bamboo charcoal (BC) was modified with NaOH and ethanol in this study. In order to acquire a high chloramphenicol (CAP) sorption performance, the bamboo charcoal was modified. Combined with the technique of Zero-Valent Iron (ZVI), iron/copper bimetallic
nanoparticles were loaded on the surface of modified bamboo charcoal (MBC), to obtain an efficient MBC/Fe/Cu system. This MBC/Fe/Cu system can not only adsorb CAP but also can degrade CAP simultaneity, with enhancing the CAP removal efficiency. The main results of this study are shown as follows:
(1) Whether BC, NaOH modified BC or ethanol modified BC followed pudo-fist-order reaction, but only ethanol modification enhanced the equilibrium adsorption capacity of CAP. Langmuir adsorption equation can describe all three CAP isothermal adsorption well. BET characterization shows that both modifications caud collap in the structure of BC, which is unfavorable for adsorption. However, both modifications incread surface oxygen-containing groups, as Boehm method, FTIR and XPS characterization shows. Most of them were hydrophilic groups, which played an important role in CAP adsorption.
(2) MBC was composited incorporated with Fe/Cu. The characterization of MBC/Fe/Cu and the experiment of its removal of CAP were carried out, in order to get the best ratio of MBC/Fe/Cu. Its removal of CAP matched pudo-fist-order reaction well. The equilibrium adsorption capacity of MBC/Fe/Cu was incread to 0.895mg/g, and half-reaction time reached only 69.87min. Not only the reaction rate was improved by Fe/Cu loading, but also the removal efficiency. However, some Fe/Cu
春节将至
nanoparticles were found gathered together in image of TEM, which would slow the reaction down.
(3) The rearch showed that pH value effected the removal of CAP by MBC/Fe/Cu greatly, and the optimum range of pH value is 4~6. However, variation of reaction temperature had little difference in CAP removal. 20~30℃ was recommended according to room temperature. Removal of CAP by MBC/Fe/Cu fitted Langmuir isothermal
