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Mechanism study on the reactions between biphenyl and HNO_2 initiated by 355 nm irradiation in aqueous phase

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Science China Chemistry 2007年第5期50卷 700-706页

作者： HUANG Li ZHANG RenXi GU DingHong LI Ping DONG WenBo hou huiqi Institute of Environmental Science Fudan University Shanghai 200433 China Institute of Environmental Science Fudan University Shanghai 200433 China Institute of Environmental Science Fudan University Shanghai 200433 China Institute of Environmental Science Fudan University Shanghai 200433 China Institute of Environmental Science Fudan University Shanghai 200433 China Institute of Environmental Science Fudan University Shanghai 200433 China

The reactions taking place in the mixed solution of biphenyl and nitrous acidafter it was exposed to UV irradiation were studied in this research *** transient specieswere identified with the nanosecond transient spectroscopic technique,and the final products wereascertained by GC-MS *** was shown that the OH radical,generated by the direct photolysis ofnitrous acid,would attack biphenyl molecule to form Bp-OH adduct with a rate constant of 9.5x10^9 Lcentre dot mol^(-1) centre dot s^(-1).The Bp-OH adduct could either react with H+ or be oxidized bynitrous acid to form *** reactions between biphenyl and nitrous acid under UVirradiation in atmospheric aqueous phase were therefore suggested to be one promising source ofnitrocompounds in the environment.

关键词： biphenyl, nitrous acid, laser flash photolysis, Bp-OH adduct, nitrosobiphenol

In situ electron-induced reduction of NOx via CNTs activated by DBD at low temperature

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Frontiers of Environmental Science & Engineering 2020年第2期14卷 87-96页

作者： Weixuan Zhao Liping Lian Xingpeng Jin Renxi Zhang Gang Luo huiqi hou Shanping Chen Ruina Zhang Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention(LAP3) Institute of Environmental ScienceFudan UniversityShanghai 200433China National Engineering Laboratory for VOCs Pollution Control Material&Technology University of Chinese Academy of SciencesBeijing 100049China Shanghai Institute for Design&Research on Environmental Engineering Shanghai 200232China

In this study,a new in situ electron-induced process is presented with carbon nanotubes(CNTs)as a reduction agent activated by dielectric barrier discharge(DBD)for nitrogen oxide(NOx)abatement at low temperature(<407 K).Compared with a single DBD system and a DBD system with activated carbon(DBD-AC),a DBD system with carbon nanotubes(DBD-CNT)showed a significant promotion of NOx removal efficiency and N2 *** the 02 content was 10%,the NOv conversion and N2 selectivity in the DBD-CNT system still reached 64.9%and 81.9%at a specific input energy(SIE)of 1424 J^L,and these values decreased to 16.8%,31.9%and 43.2%,62.3%in the single DBD system and the DBD-AC system,respectively.X-ray photoelectron spectroscopy(XPS)and scanning electron microscopy(SEM)were utilized to investigate surface changes in the CNTs after activation by DBD to explore the NO.t reduction abatement mechanism of this new ***,the outlet gas components were also observed via Fourier transform infrared spectroscopy(FTIR)to help reveal the NOr reduction *** results verified that carbon atoms excited by DBD and the structure of CNTs contributed to the synergistic activity of the DBD-CNT *** new deNOx process was accomplished through in situ heterogenetic reduction reactions between the NOx and carbon atoms activated by the plasma on the *** addition,further results indicated that the new deNOv process exhibited acceptable S02 tolerance and water resistance.

关键词： Dielectric barrier discharge NOx abatement In situ electron-induced reduction Carbon nanotubes

Study on the reaction of carbon disulfide with hydroxyl radical in aqueous solution

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Chinese Science Bulletin 2005年第24期50卷 2832-2835页

作者： FANG Haojie OUYANG Bin QIN Yan DONG Wenbo hou huiqi Environment Science Institute Fudan University Shanghai 200433 China School of Environmental Science and Engineering Donghua University Shanghai 200051 China

The laser flash photolysis technique is em- ployed to investigate the reaction mechanism of CS2 with ·OH in the nitrogen-saturated aqueous solution. By comparison of the transient absorption spectra obtained at different phases and pHs and through the addition of proper radical cation scavenger, CS2 is determined to react with ·OH to form ·CS2OH adduct, instead of the CS2+ radical cation. At pH 1―5, ·CS2OH decomposes into COS and ·HS, while at pH>5, it further reacts with OH- to form CS2O-. The tem- perature dependent kinetics for the reaction CS2 + ·OH → ·CS2OH is also reported in this paper with an estimated activation energy of (26.9±1.0) kJ·mol?1.

关键词：激光闪光光解二硫化碳羟基反应机理水溶液

DBD coupled with MnOx/γ-Al2O3 catalysts for the degradation of chlorobenzene

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Plasma Science and Technology 2020年第3期22卷 115-122页

作者： Yanghaichao LIU Liping LIAN Weixuan ZHAO Renxi ZHANG huiqi hou Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention(LAP3) Institute of Environmental ScienceFudan UniversityShanghai 200433People’s Republic of China National Engineering Laboratory for VOCs Pollution Control Material&Technology University of Chinese Academy of SciencesBeijing 100049People’s Republic of China

This paper investigates the degradation of chlorobenzene by dielectric barrier discharge(DBD)coupled with MnOx/γ-Al2O3 ***/γ-Al2O3 catalysts were prepared using the impregnation method and were characterized in detail by N2 adsorption/desorption,x-ray diffraction and x-ray photoelectron *** with the single DBD reactor,the coupled reactor has a better performance on the removal rate of chlorobenzene,the selectivity of COx,and the inhibition of ozone production,especially at low discharge *** degradation rate of chlorobenzene and selectivity of COx can reach 96.3%and 53.0%,respectively,at the specific energy density of 1350 J ***,the ozone concentration produced by the discharge is significantly reduced because the MnOx/Al2O3 catalysts contribute to the decomposition of ozone to form oxygen atoms for the oxidation of *** addition,based on analysis of the byproducts,the decomposition mechanism of chlorobenzene in the coupled reactor is also discussed.

关键词： plasma catalytsis system chlorinated VOCs MnOx/Al2O3 catalysts

Investigation of the cross-reaction mechanism of C_6H_5F-HNO_2 aqueous solution irradiated at 355 nm by transient absorbance spectrum technique

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Chinese Science Bulletin 2008年第7期53卷 998-1003页

作者： ZHANG RenXi SHEN Yan LI Ping HUANG Li DONG WenBo hou huiqi Institute of Environmental Science Fudan University Shanghai 200433 China

The transient absorption spectrum technique was employed to investigate the cross-reaction mecha-nism of C6H5F-HNO2 aqueous solution irradiated at 355 nm. The characteristic and the kinetic parame-ters of transient species were also detected. Hydroxyl radical derived from the photolysis of HNO2 was added to monofluorobenzene with a second-order rate constant of (5.83±0.17)×109 L·mol-1·s-1 to form an adduct, C6H5F···OH, which was able to react with HNO2 as the main reaction pathway with a rate constant of (8.3±0.1)×107 L·mol-1·s-1. The C6F6···OH adduct can also be decayed by elimination of H2O to yield monofluorophenyl radical C6H4F·. By GC-MS technique, the final products were identified to be monofluorophenol, nitro-monofluorobenzene, nitro-monofluorophenol and para-fluorobiphenyl.

关键词：溶液作用瞬变现象吸收率光谱学

Study on degradation mechanism of aniline solution by potassium ferrate

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环境污染与防治 2009年第4期31卷 I0004-I0009页

作者： Ye Zhaolian Sun Xiao Zheng Lu hou huiqi Institute of Environmental Science Fudan University Shanghai 200433 Department of Environmental Engineering J iangsu Teacher＇s University of TechnologyChangzhou Jiangsu 21300~ Shanghai Municipal Engineering Design General Institute Shanghai 200092

研究了高铁酸钾投加量、初始pH及苯胺初始浓度对苯胺降解效果的影响。结果表明，苯胺废水的COD去除率照高铁酸钾投加量和苯胺初始浓度的增大而升高，而初始pH对COD去除率影响不明显。对高铁酸钾降解苯胺废水后的产物进行了气相色谱／质... 详细信息

研究了高铁酸钾投加量、初始pH及苯胺初始浓度对苯胺降解效果的影响。结果表明，苯胺废水的COD去除率照高铁酸钾投加量和苯胺初始浓度的增大而升高，而初始pH对COD去除率影响不明显。对高铁酸钾降解苯胺废水后的产物进行了气相色谱／质谱（GC／MS）分析，在此基础上详细探讨了高铁酸钾降解苯胺的机制。

关键词：《环境污染与防治》期刊杂志英文摘要

Conversion of NO with a catalytic packedbed dielectric barrier discharge reactor

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Plasma Science and Technology 2017年第11期19卷 67-74页

作者： Xu CAO Weixuan ZHAO Renxi ZHANG huiqi hou Shanping CHEN Ruina ZHANG Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention （LAP^3） Institute of Environmental Science Fudan University Shanghai 200433 People＇s Republic of China Shanghai Institute for Design ＆ Research on Environmental Engineering Shanghai 200232 People＇s Republic of China

This paper discusses the conversion of nitric oxide（NO） with a low-temperature plasma induced by a catalytic packed-bed dielectric barrier discharge（DBD） reactor. Alumina oxide（Al2O3）,glass（SiO2） and zirconium oxide（ZrO2）, three different spherical packed materials of the same size, were each present in the DBD reactor. The NO conversion under varying input voltage and specific energy density, and the effects of catalysts（titanium dioxide（TiO2） and manganese oxide（Mn Ox） coated on Al2O3） on NO conversion were investigated. The experimental results showed that NO conversion was greatly enhanced in the presence of packed materials in the reactor, and the catalytic packed bed of Mn Ox/Al2O3 showed better performance than that of TiO2/Al2O3. The surface and crystal structures of the materials and catalysts were characterized through scanning electron microscopy analysis. The final products were clearly observed by a Fourier transform infrared spectrometer and provided a better understanding of NO conversion.

关键词： dielectric barrier discharge materials catalysts NO electrical field

Decomposition of dioxin-like components in a DBD reactor combined with Hg/Ar electrodeless ultraviolet

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Plasma Science and Technology 2020年第3期22卷 34-39页

作者： Weixuan ZHAO Liping LIAN Yanpei WU Yanghaichao LIU Renxi ZHANG Gang LUO huiqi hou Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention(LAP3) Institute of Environmental ScienceFudan UniversityShanghai 200433People’s Republic of China National Engineering Laboratory for VOCs Pollution Control Material&Technology University of Chinese Academy of SciencesBeijing 100049People’s Republic of China

A new combined reactor with Hg/Ar electrodeless ultraviolet(EDUV)activated by DBD for 3,4-dichlorodiphenyl ether abatement is *** effect of specific input energy and feeding gas component on 3,4-dichlorodiphenyl ether removal efficiency has been *** with a single DBD system,this new combined process performed a significant promotion on 3,4-dichlorodiphenyl ether *** results verified that active oxygen clearly contributed to the synergistic activity of DBD-EDUV *** of emission spectra showed that UV radiation of 253.7 nm could be detected in the DBD-EDUV ***,the products of DBD-EDUV process were analyzed via gas chromatographymass spectrometer(GC-MS)to reveal involved decomposition mechanism.

关键词： dielectric barrier discharge(DBD) dioxin-like 3,4-dichlorodiphenyl ether EDUV photolysis

Study on gaseous CS_2 using laser-induced fluorescence

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Journal of Environmental Sciences 1995年第4期7卷 484-490页

作者： Pan Zhe Zhang Yue Deng Guohong Pan Xunxi , hou huiqi Li Changlin(Environmental Science Institute , Fudan University, Shanghai 200433 , China)

ＳｔｕｄｙｏｎｇａｓｅｏｕｓＣＳ＿２ｕｓｉｎｇｌａｓｅｒ－ｉｎｄｕｃｅｄｆｌｕｏｒｅｓｃｅｎｃｅＰａｎＺｈｅ；ＺｈａｎｇＹｕｅ；ＤｅｎｇＧｕｏｈｏｎｇ；ＰａｎＸｕｎｘｉ，ＨｏｕＨｕｉｑｉ；ＬｉＣｈａｎｇｌｉｎ（Ｅｎｖ... 详细信息

ＳｔｕｄｙｏｎｇａｓｅｏｕｓＣＳ＿２ｕｓｉｎｇｌａｓｅｒ－ｉｎｄｕｃｅｄｆｌｕｏｒｅｓｃｅｎｃｅＰａｎＺｈｅ；ＺｈａｎｇＹｕｅ；ＤｅｎｇＧｕｏｈｏｎｇ；ＰａｎＸｕｎｘｉ，ＨｏｕＨｕｉｑｉ；ＬｉＣｈａｎｇｌｉｎ（ＥｎｖｉｒｏｎｍｅｎｔａｌＳｃｉｅｎｃｅ...

关键词： fluorescence gaseous CS_2 LIF method.