不能将值 NULL 插入列 'id',表 'aje_website.dbo.t_web_site_access';列不允许有空值。INSERT 失败。 语句已终止。 欢迎访问《生态毒理学报》编辑部网站!

首页 | 期刊简介 | 编委会 | 投稿要求 | 化学品管理信息动态 | 学术会议 | 专辑 | 毒理学测试技术设备 | 订购本刊 | 联系我们 | English version

邓亚梅1,2,王荣富1,*,方国东2,#,周东美2. 五氧化二钒类Fenton降解邻苯二甲酸二乙酯的机制研究[J]. 生态毒理学报, 2017, 12(3): 717-725
五氧化二钒类Fenton降解邻苯二甲酸二乙酯的机制研究
Vanadium Pentoxide-Based Fenton-like Reactions for Diethyl Phthalate Degradation
投稿时间:2017-01-09  修订日期:2017-03-14
DOI:10.7524/AJE.1673-5897.20170109001
中文关键词:  五氧化二钒  过氧化氢  类Fenton  邻苯二甲酸二乙酯  降解机制
英文关键词:V2O5  H2O2  Fenton-like  DEP  degradation mechanism
基金项目:“十二五”国家科技支撑计划(2012BAD14B);江苏省自然科学基金(BK20141047);江苏省环保科技课题(2015011)
作者单位
邓亚梅1,2,王荣富1,*,方国东2,#,周东美2 1. 安徽农业大学合肥 230036 2. 南京土壤研究所 中国科学院土壤环境与污染修复重点实验室南京 210008 
摘要点击次数: 140
全文下载次数: 71
中文摘要:
      发展了基于五氧化二钒(V2O5)和过氧化氢(H2O2)的新型类Fenton体系,探索了此体系产生羟基(·OH)的机制及降解邻苯二甲酸二乙酯(DEP)的效率;并考察了V2O5投加量、H2O2浓度,以及草酸对DEP降解的影响。结果表明,当V2O5投加量为0.1 g L-1,H2O2浓度为2.0 mmol L-1,反应24 h后,对DEP(25 mg L-1)的降解率可达61.1%,增加或降低V2O5投加量和H2O2浓度均不利于DEP的降解。利用电子顺磁共振技术(Electron Paramagnetic Resonance, EPR)耦合5,5-二甲基-1-吡咯啉氮氧化物(DMPO)为捕获剂对反应体系中的主导自由基进行鉴定,发现·OH是体系降解DEP的主要活性物种,利用苯甲酸作为探针分子实现了·OH的间接定量,并初步推测了V2O5活化H2O2的过程。
  
AuthorAffiliation
Deng Yamei1,2, Wang Rongfu1,*, Fang Guodong2, #, Zhou Dongmei21. Anhui Agricultural University, Hefei 230036, China 2. Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
英文摘要:
      In this study, a novel Fenton-like reaction based on V2O5 and H2O2 was developed, and the mechanism of hydroxyl radical production as well as the efficiency for diethyl phthalate (DEP) degradation was explored in these processes. Additionally, the effects of V2O5 loading, H2O2 concentration and oxalic acid on DEP degradation in the V2O5/H2O2 system were also examined. The results showed that 61.1% of 25 mg L-1 DEP was degraded with 2 mmol L-1 H2O2 in the presence of 0.1 g L-1 V2O5 within 24 h, which indicated that V2O5 exhibits an excellent ability to catalyze the decomposition of H2O2 for DEP degradation, while both increasing and decreasing V2O5 loading or H2O2 concentration inhibited DEP degradation. Electron paramagnetic resonance (EPR) technique coupled with DMPO as spin-trapping agent was used to identify the dominant reactive species, which indicated that hydroxyl radical was the main free radical for DEP degradation in the V2O5/H2O2 system. Chemical probe method with benzoic acid (BA) was further used to quantify the formation of hydroxyl radical and elucidated mechanism of this process.
查看全文  查看/发表评论  下载PDF阅读器
关闭

您是第3512410位访问者   京ICP备 09058833 号

主办单位:中国科学院生态环境研究中心     单位地址:北京市海淀区双清路18号

 服务热线:010-62941072       传真:010-62923563       邮编:100085    Email: stdlxb@rcees.ac.cn

    本系统由北京勤云科技发展有限公司设计

0463美女美女3764美女美女ktv