石墨烯负载纳米铁对废水中铅的去除  

Removal of lead from waste water by graphene-supported nanoscale zero-valent iron

作　　者：陈祝炳 袁永海 尹昌慧 施意华 杨仲平 

机构地区：[1]中国有色桂林矿产地质研究院有限公司,广西桂林541004

出　　处：《矿产与地质》2017年第4期808-811,共4页Mineral Resources and Geology

基　　金：广西科学研究与技术开发计划项目(桂科能141123006-16)资助

摘　　要：废水中的铅极难降解,本研究基于石墨烯负载纳米铁材料对铅的还原和高效吸附,以市售石墨稀为原料,采用液相还原法合成了石墨烯负载纳米铁材料(Graphene-supported nanoscale zero-valent iron,G-nZVI)。借助扫描电子显微镜(SEM)、红外光谱分析仪(FTIR)表征,研究了以G-nZVI为材料,应用于水体中铅的去除的影响因素,结果显示:室温下,当G-nZVI投加量为0.6g/L,铅的初始浓度为200mg/L,初始pH值为3.0时,铅的去除率达到99%以上。G-nZVI材料对铅的去除高效、快速,去除产物可通过外加磁力方法达到与水体分离的目的,防止对水体的二次污染。在环境重金属污染治理方面具有较好的应用前景。Lead in waste water is extremely hard to get degraded.This paper studied the effect of reduction and high-efficient adsorption on lead by graphene-supported nanoscale zero-valent iron(G-nZVI).By using graphene available in the market as material,the authors made G-nZVI by applying liquid phase reduction method.After materials characterization by applying scanning electron microscopy(SEM)and fourier transform infrared spectroscopy(FTIR),the removal effect of lead from water by G-nZVI was examined.The results indicated that at room temperature,more than 99% of lead was removed when the G-nZVI addition amount was 0.6 g/L,the initial lead concentration was 200 mg/L and the initial pH value was 3.0.G-nZVI is efficient and fast in removal of lead,and the product of removal can be made magnetic to be separated from the water in order to prevent repeated pollution of water.So,this method has a good application prospects in treating environmental heavy metal pollution.

关 键 词：石墨烯 纳米零价铁 除铅 重金属污染 废水治理 

分 类 号：O657.32[理学—分析化学] TH744.12[理学—化学]