Effective degradation of refractory nitrobenzene in water by the natural 4-hydroxycoumarin under solar illumination

Wei, Tuo1; Waqas, Muhammad1; Xiao, Ke1; Yang, Bo1; Luo, Yu1; Luo, Qiuhan1; Zhang, Junmin1; Wang, Mingliang1; Zhu, Caizhen1; He, Tingchao2; Lu, Zhouguang3

2019-01

10.1016/j.chemosphere.2018.10.034

CHEMOSPHERE   影响因子和分区

0045-6535

1879-1298

In this study, nitrobenzene (NB) as typical refractory organic pollutants was effectively degraded by a new green approach, which was achieved by the chemical effect of natural organic matters (NOMs) under solar illumination as a potential natural degradation process. 4-hydroxycoumarin (4HC), which is natural compound and can be extracted from many plants, was found as an efficient photosensitizer to promote the photoreduction of NB to 4-aminophenol under the solar illumination. The reaction products were definitely identified by LC-MS/MS and H-1 NMR. The response spectrum of 4HC excited state (4H-chromene-2,4-diol radical, S-1) as key intermediate was also obtained by transient absorption spectroscopy (TAS) measurements, which showed that the decay time of S-1 was around 250 ps. Then, the measurements of electron paramagnetic resonance (EPR) confirmed the existence of center dot OH. As a result, the reaction mechanism between 4HC and NB was proposed. In addition, the influence parameters such as light sources, gas surroundings, solvents, pH values were investigated to further reveal the reaction process. (C) 2018 Elsevier Ltd. All rights reserved.

4-Hydroxycoumarin Nitrobenzene Photoreduction degradation Natural organic matter Solar illumination

SCI ; EI

英语

其他

Shenzhen Science & Technology Project[ZDSYS201606061530079] ; Shenzhen Science & Technology Project[JCYJ20150529164656097]

Environmental Sciences & Ecology

Environmental Sciences

WOS:000450383400023

PERGAMON-ELSEVIER SCIENCE LTD

20184506042936

Absorption spectroscopy ; Biogeochemistry ; Biological materials ; Electron spin resonance spectroscopy ; Excited states ; Light sources ; Nitrobenzene ; Nuclear magnetic resonance ; Organic pollutants ; Paramagnetic resonance ; Photosensitizers ; Refractory materials

Water Treatment Techniques:445.1 ; Biological Materials and Tissue Engineering:461.2 ; Magnetism: Basic Concepts and Phenomena:701.2 ; Light/Optics:741.1 ; Chemistry:801 ; Biochemistry:801.2 ; Organic Compounds:804.1 ; Refractories:812.2 ; Atomic and Molecular Physics:931.3

ENVIRONMENT/ECOLOGY

Web of Science

1.Shenzhen Univ, Coll Chem & Environm Engn, Shenzhen 518055, Peoples R China
2.Shenzhen Univ, Coll Phys & Energy, Shenzhen 518055, Peoples R China
3.South Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China

Wei, Tuo,Waqas, Muhammad,Xiao, Ke,et al. Effective degradation of refractory nitrobenzene in water by the natural 4-hydroxycoumarin under solar illumination[J]. CHEMOSPHERE,2019,215:199-205.

Wei, Tuo.,Waqas, Muhammad.,Xiao, Ke.,Yang, Bo.,Luo, Yu.,...&Lu, Zhouguang.(2019).Effective degradation of refractory nitrobenzene in water by the natural 4-hydroxycoumarin under solar illumination.CHEMOSPHERE,215,199-205.

Wei, Tuo,et al."Effective degradation of refractory nitrobenzene in water by the natural 4-hydroxycoumarin under solar illumination".CHEMOSPHERE 215(2019):199-205.