包覆型纳米零价铁的制备及其去除水中的活性艳蓝  

Preparation of coated nanoscale zero-valent iron and its application in removing KN-R from wastewater

作　　者：成岳[1] 焦创[1] 樊文井[1] 刘海江[1] 

机构地区：[1]景德镇陶瓷学院材料科学与工程学院江西省先进陶瓷材料重点实验室,景德镇333403

出　　处：《环境工程学报》2013年第1期53-57,共5页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金资助项目(51268018);景德镇陶瓷学院研究生创新基金项目

摘　　要：采用流变相法,以FeSO4.7H2O∶KBH4=1∶2(摩尔比)为固相介质,0.06 g/mL CMC(羧甲基纤维素)水溶液为液相介质,固液比1∶2,反应2 h制备出包覆型纳米零价铁;采用XRD、TEM等手段对合成的纳米零价铁进行表征。探讨不同反应条件对包覆型纳米铁去除活性艳蓝的影响。实验结果表明,初始活性艳蓝(浓度100 mg/L)pH为5,包覆型纳米铁的投加量为6 g/L,反应时间为30 min时,活性艳蓝的去除率可达96%。通过研究机理,其吸附过程符合二级吸附动力学,降解过程符合一级反应动力学。In this study, coated nanoscale zero-valent iron （nano-ZVI） was prepared by using rheological phase reaction method. FeSO4 · 7H/O and KBH4 （molar ratio of 1：2） were used as solid-phase media, and car- boxymethyl cellulose solution （0.06 g/mL） was used as liquid medium. The ratio of solid/liquid was 1 ： 2. Nano-ZVI was prepared with a reaction time of 2 h. The nano-ZVI was characterized by using XRD and TEM. The removal efficiency of dye KN-R by ZVI was evaluated under different reaction conditions. Experimental resuits showed that KN-R removal efficiency of 96% was obtained at an initial KN-R concentration of 100 mg/L, pH of 5, ZVI dose of 6 g/L, and a reaction time of 30 min. The adsorption kinetic followed pseudo-second-order model, and degradation of KN-R followed first-order model.

关 键 词：流变相 纳米零价铁 羧甲基纤维素 活性艳蓝 

分 类 号：X703.1[环境科学与工程—环境工程]