流变相法制备包覆型CMC-Fe^0及降解水中TCE的研究  

Preparation of Coated CMC-Fe^0 Using Rheological Phase Reaction Method and Research on Degradation of TCE in Water

作　　者：樊文井[1] 成岳[1] 余淑贞[1] 范小丰[1] 

机构地区：[1]景德镇陶瓷学院环境科学与工程系,景德镇333403

出　　处：《环境科学》2015年第6期2161-2167,共7页Environmental Science

基　　金：国家自然科学基金项目(56218018);江西省高校中青年教师发展计划访问学者项目

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5 mg·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.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 adsorptionstripping and used to study reductive dechlorination of TCE. The experimental results indicated that the removal rate of TCE was about100% when the CMC-Fe0 dosage was 6 g·L- 1,the initial TCE concentration was 5 mg·L- 1and 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.

关 键 词：流变相法 包覆型CMC-Fe0 TCE 降解率 反应动力学 

分 类 号：X703.1[环境科学与工程—环境工程]