水资源与水工程学报

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(S₂O₈^2-)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S₂O₈^2-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@Fe₂O₃活化S₂O₈^2-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@Fe₂O₃活化S₂O₈^2-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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