在线阅读 --自然科学版 2019年2期《铈铁复合类Fenton反应去除邻苯二酚的性能及机制探究》
铈铁复合类Fenton反应去除邻苯二酚的性能及机制探究--[在线阅读]
王海波1, 何士龙1, 陈星2, 杨婉1
1. 中国矿业大学 环境与测绘学院, 江苏 徐州 221116;
2. 合肥工业大学 工业与装备技术研究院, 安徽 合肥 230000
起止页码: 134--140页
DOI: 10.13763/j.cnki.jhebnu.nse.2019.02.008
摘要
研究了Fe2+/Ce3+/H2O2类Fenton反应体系去除邻苯二酚的性能.结果表明,在c(邻苯二酚)=10mmol/L,pH=7及n(Fe2+):n(Ce3+):n(H2O2)=1:2:30的条件下,邻苯二酚的去除率可以达到85%以上,明显高于经典Fenton的去除率,且铈的加入改善了经典Fenton反应最适pH值在酸性范围内的缺点.通过对反应后生成沉淀物的FTIR和XPS表征,推测将Ce3+引入经典Fenton体系后,其提高了HO2·/O2-·的生成速率,进而促进了类Fenton反应中Fe3+向Fe2+的转化,进一步催化了羟基自由基的产生,从而有效提高了邻苯二酚的降解转化.此外,部分铁和铈在反应过程中形成的沉淀化合物也有助于邻苯二酚及其降解中间产物的吸附去除.

Removal Performance and Mechanism of Ce/Fe Fenton-like System to Treat Catechol
WANG Haibo1, HE Shilong1, CHEN Xing2, YANG Wan1
1. School of Environment and Mapping, China University of Mining and Technology, Jiangsu Xuzhou 221116, China;
2. Institute of Industry & Equipment Technology, Hefei University of Technology, Anhui Hefei 230000, China
Abstract:
The removal performance of catechol by Fe2+/Ce3+/H2O2 Fenton-like reaction system was studied.The results showed that the optimum reaction conditions for the treatment of 10 mmol/L catechol were as follows:pH=7,n(Fe2+):n(Ce3+):n(H2O2) was 1:2:30,the removal rate of catechol could reach more than 85%,which was obviously higher than that of classical fenton.The addition of cerium overcome the disadvantage of narrow application range of pH value in a classical Fenton reaction.The composition of the precipitates was characterized by FTIR and XPS.The influence of the addition of cerium on the classical Fenton reaction and the possible removal mechanism were investigated.In addition,the precipitated compounds formed from the reaction of some iron and cerium ions also contribute to the adsorption and removal of catechol and its degradation intermediates.

收稿日期: 2018-09-24
基金项目: 中央高校基本科研学科前沿科学研究专项基金(2015XKMS053)

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