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[1]杨绍贵*,孟令君,李东方,等.微波诱导催化降解水中孔雀石绿研究[J].南京大学学报(自然科学版),2017,53(二):294.[doi:10.13232/j.cnki.jnju.2017.02.010]
 Yang Shaogui*,Meng Lingjun,Li Dongfang,et al.Microwave induced catalytic degradation of malachite green in water[J].Journal of Nanjing University(Natural Sciences),2017,53(二):294.[doi:10.13232/j.cnki.jnju.2017.02.010]
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微波诱导催化降解水中孔雀石绿研究()
     

《南京大学学报(自然科学版)》[ISSN:0469-5097/CN:32-1169/N]

卷:
53
期数:
2017年第二期
页码:
294
栏目:
出版日期:
2017-04-01

文章信息/Info

Title:
Microwave induced catalytic degradation of malachite green in water
作者:
杨绍贵*孟令君李东方何 欢孙 成
污染控制与资源化研究国家重点实验室,南京大学环境学院,南京,210023
Author(s):
Yang Shaogui*Meng LingjunLi DongfangHe HuanSun Cheng
State Key Laboratory of Pollution Control and Resources Reuse,School of the Environment,Nanjing University,Nanjing,210023,China
关键词:
微波诱导催化铁酸锌孔雀石绿降解机理
Keywords:
microwave induced catalysiszinc ferritemalachite greendegradation mechanisms
分类号:
X131
DOI:
10.13232/j.cnki.jnju.2017.02.010
文献标志码:
A
摘要:
以纳米级铁酸锌(ZnFe2O4)粉体为微波诱导催化剂,构建了微波-ZnFe2O4催化反应体系.微波-ZnFe2O4反应体系下孔雀石绿(MG)的降解结果表明:20 mg·L-1的目标化合物在2 min内基本上被完全去除.利用LC/MS与GC/MS鉴定了孔雀石绿的主要降解产物,并推断其降解途径:逐步脱甲基、共轭生色团的破坏、开环和矿化.对比研究了添加H2O2进入微波-ZnFe2O4催化反应体系前后降解产物的变化,结果表明:H2O2等的加入能大幅提高孔雀石绿降解效率,有助于共轭生色团的破坏,这归因于H2O2与催化剂之间发生了Fenton反应.研究为三苯甲烷染料类废水处理提供了新的有效方法.
Abstract:
Microwave induced catalytic degradation of malachite green(MG)was investigated in this study,where Nano?sized zinc ferrite powder synthesized via coprecipitation process was used as a microwave induced catalyst.The phase structure and size of the catalyst were characterized by XRD and TEM.The results indicated that the catalyst was a pure ZnFe2O4 and its grain was spherical;and grain size rose with the calcination temperature.The degradation results showed that the target compounds of 20 mg·L-1 were completely removed in 2 minutes.Main intermediate products were identified by LC/MS and GC/MS.the possible degradation mechanisms contains four processes:N?demethylation,chromophore cleavage,ring opening and mineralization.Comparison on the differences of intermediates products before and after H2O2 addition,indicated its possible degradation mechanisms were different.Chromophore cleavage process played a more important role in the presence of H2O2.Microwave induced catalysis could be recommended as a promising method for wastewater treatment.

参考文献/References:

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备注/Memo

备注/Memo:
基金项目:国家自然科学基金(51278242),江苏省产学研前瞻性联合研究项目(BY2016116) 收稿日期:2016-11-21 *通讯联系人,E-mail:yangdlut@126.com,yangsg@nju.edu.cn
更新日期/Last Update: 2017-03-26