Ce负载粉煤灰复合材料的制备、表征及其吸附应用  

Preparation, characterization and adsorption application of cerium(Ⅲ)/fly ash composite materials

作　　者：尹海洋 李北罡[1] YIN Hai-yang;LI Bei-gang(College of Chemical&Environmental Science,Inner Mongolia Normal University,Inner Mongolia Key Laboratory of Environmental Chemistry,Hohhot 010022,China)

机构地区：[1]内蒙古师范大学化学与环境科学学院,内蒙古自治区环境化学重点实验室,呼和浩特010022

出　　处：《农业环境科学学报》2018年第9期2005-2013,共9页Journal of Agro-Environment Science

基　　金：国家自然科学基金项目(21167011);内蒙古自治区自然科学基金项目(2015MS0226);内蒙古师范大学研究生科研创新基金项目(CXJJS17084)

摘　　要：将粉煤灰(FA)通过盐酸改性得到酸改性粉煤灰并作为载体,以Ce离子为活性成分,通过溶液反应法制备了一种新型Ce离子负载FA复合吸附材料[Ce(Ⅲ)/FA],采用X射线衍射仪(XRD)、扫描电子显微镜(SEM)、能谱仪(EDS)、红外光谱仪(FT-IR)及N2吸附脱附技术进行表征,研究了吸附剂的制备条件和工艺参数对Ce(Ⅲ)/FA去除水中活性艳红RBR KD-8B染料的影响。结果表明:当在室温下所取FA、HCl、Ce(NO3)3·6H2O质量比为25∶5.4∶1,制备时间为30 min,所得Ce(Ⅲ)/FA对活性艳红RBR KD-8B具有很好的去除效果;在活性艳红RBR KD-8B模拟废水初始质量浓度为2000 mg·L^(-1),p H值为6,投加量5 g·L^(-1),吸附时间90 min,吸附温度25℃时,Ce(Ⅲ)/FA对活性艳红RBR KD-8B的吸附量可达379.9 mg·g^(-1),比FA增大了6.12倍。表征结果说明:FA经酸改性-掺杂Ce元素后其表面形貌发生了明显的变化,且Ce(Ⅲ)以离子形式成功负载于FA上,所制得的复合吸附材料Ce(Ⅲ)/FA对活性艳红RBR KD-8B的吸附性能得到显著提升。A novel modified Ce(Ⅲ)/fly ash(FA)reactive brilliant red KD-8B(RBR KD-8B)removal adsorbent was obtained using the solution reaction method.The means of the X-ray powder diffraction(XRD),Fourier transform infrared spectroscopy(FTIR),Scanning electron microscope(SEM),Energy Disperse Spectroscopy(EDS),and N2 adsorption-desorption were used to analyze the physical and chemical properties of the materials.The effects of the preparation conditions and process parameters of the adsorbent on the removal of RBR KD-8B from water by the Ce(Ⅲ)/FA were studied.The results showed that the prepared Ce(Ⅲ)/FA has a good adsorption performance for RBR KD-8B when the mass ratio of FA,HCl,and Ce(NO3)3·6H2O was 25∶5.4∶1 and preparation time was 30 min at 25℃.The adsorption capacity of Ce(Ⅲ)/FA on RBR KD-8B reached 379.9 mg·g^-1,6.12 times higher than that of FA,when the initial RBR KD-8B mass concentration was 2000 mg·L^-1,the pH value was 6,the adsorption time was 90 min,and the dosage was 5 g·L^-1.The characterization shows that the surface morphology of Ce(Ⅲ)/FA had obviously changed compared with that of FA,and the Ce(Ⅲ)ions were successfully loaded onto the FA surface.The adsorption capacity of Ce(Ⅲ)/FA for RBR KD-8B was significantly enhanced.

关 键 词：粉煤灰 复合吸附剂 制备 活性艳红RBRKD-8B 吸附 

分 类 号：X703[环境科学与工程—环境工程]