核壳结构纳米铁活化过硫酸盐降解HBCDs的研究  

Activation of persulfate by core-shell Fe@ Fe_2O_3 nanostructures for degradation of HBCDs

作　　者：张慧鸣 范均朝 陈雯铃 孙红文[1] 

机构地区：[1]南开大学环境科学与工程学院,教育部环境污染过程与基准重点实验室,天津300350

出　　处：《水资源与水工程学报》2017年第3期10-14,共5页Journal of Water Resources and Water Engineering

基　　金：国家973计划课题(2014CB441104);国家级本科生科技创新项目(20151005501)

摘　　要：本文旨在建立一种新型的高效去除持久性溴代阻燃剂-六溴环十二烷(HBCDs)的方法。为此,制备了具有核壳结构的纳米零价铁(Fe@Fe_2O_3),用其活化过硫酸盐(S_2O_8^(2-))对HBCDs进行降解去除,并研究了体系p H值、物质的量比、HBCDs初始浓度对降解效率的影响。结果表明:Fe@Fe_2O_3活化S_2O_8^(2-)可产生大量强氧化性自由基,在酸性条件下的降解效率要高于中性和碱性;Fe@Fe_2O_3活化S_2O_8^(2-)的效果要好于Fe2+,当物质的量比为3∶1时,对HBCDs的降解效果最佳,可达70%。可见,改性制备的Fe@Fe_2O_3活化S_2O_8^(2-)可以成为一种较为有效的降解HBCDs技术。This paper was to set up a novel effective technology to remove a persistent brominated flame retardant, which is called hexabromocyclododecanes （HBCDs）.The core-shell Fe@Fe2O3 nanostructures were synthesized and adopted to activate persulfate to degrade HBCDs.Furthermore, the influences of pH value, the ratio of Fe@Fe2O3 and persulfate, and initial concentration of HBCDs on HBCDs reduction were studied.The results show that persulfate activated by core-shell Fe@Fe2O3 produced a large number of strong oxidation radicals.The degradation rate of HBCDs under acidic condition was higher than those under alkaline or neutral conditions.The Fe@Fe2O3 activator exhibited greater persulfate activation efficiency compared with the ferrous ions.The highest HBCDs removal rate （70%） was achieved at the ratio of Fe@Fe2O3： persulfate of 3：1.Therefore, core-shell Fe@Fe2O3 nanostructures are good activators of persulfate to degrade HBCDs.

关 键 词：核壳结构纳米零价铁线 六溴环十二烷(HBCDs) 过硫酸盐 降解 

分 类 号：X592[环境科学与工程—环境工程] TB383[一般工业技术—材料科学与工程]