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张慧鸣, 范均朝, 陈雯铃, 孙红文.核壳结构纳米铁活化过硫酸盐降解HBCDs的研究水资源与水工程学报[J].,2017,28(3):10-14
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@Fe2O3 nanostructures for degradation of HBCDs
  
DOI:10.11705/j.issn.1672-643X.2017.03.03
中文关键词:  核壳结构纳米零价铁线  六溴环十二烷(HBCDs)  过硫酸盐  降解
英文关键词:core-shell Fe@Fe2O3 nanostructures  hexabromocyclododecane(HBCDs)  persulfate  degradation
基金项目:国家973计划课题(2014CB441104);国家级本科生科技创新项目(20151005501)
作者单位
张慧鸣, 范均朝, 陈雯铃, 孙红文 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 
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中文摘要:
      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@Fe2O3),用其活化过硫酸盐(S2O82-)对HBCDs进行降解去除,并研究了体系pH值、物质的量比、HBCDs初始浓度对降解效率的影响。结果表明:Fe@Fe2O3活化S2O82-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@Fe2O3活化S2O82-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@Fe2O3活化S2O82-可以成为一种较为有效的降解HBCDs技术。
英文摘要:
      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.
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