| 流变相法制备包覆型CMC-Fe0及降解水中TCE的研究 |
| 摘要点击 2459 全文点击 1725 投稿时间：2014-11-23 修订日期：2015-01-09 |
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| 中文关键词 流变相法 包覆型CMC-Fe0 TCE 降解率 反应动力学 |
| 英文关键词 rheological phase reaction method coated CMC-Fe0 TCE removal rate reaction kinetics |
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| 中文摘要 |
| 以廉价环保的羧甲基纤维素钠 (CMC)为表面修饰剂,采用流变相反应法制备包覆型纳米零价铁(CMC-Fe0),用XRD、SEM和TEM、氮气吸附-脱附手段对样品进行表征,并利用合成的零价铁粒子对三氯乙烯(TCE)进行还原脱氯反应. 结果表明,当CMC-Fe0投加量为6 g·L-1,TCE初始浓度为5mg·L-1时,反应40 h去除率达100%. 包覆型CMC-Fe0对TCE的还原反应符合准一级反应动力学. 最后,对反应产物进行了简单易行的回收. |
| 英文摘要 |
| The coated nanoscale zero-valent iron (coated CMC-Fe0) was synthesized with cheap and environment friendly CMC as the coating agent using rheological phase reaction. The sample was characterized by means of XRD, SEM, TEM and N2 adsorption-stripping and used to study reductive dechlorination of TCE. The experimental results indicated that the removal rate of TCE was about 100% when the CMC-Fe0 dosage was 6 g·L-1, the initial TCE concentration was 5 mg·L-1 and the reaction time was 40 h. The TCE degradation reaction of coated CMC-Fe0 followed a pseudo- first-order kinetic model. Finally, the product could be simply recovered. |
