|Table of Contents|

[1] Zhang Junwei, Fu Dafang, Yang Lili, et al. Enhanced photocatalytic degradation of sulfadiazine by Fe3+in aqueous TiO2 suspension [J]. Journal of Southeast University (English Edition), 2011, 27 (3): 275-279. [doi:10.3969/j.issn.1003-7985.2011.03.010]
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Enhanced photocatalytic degradation of sulfadiazine by Fe3+in aqueous TiO2 suspension()
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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:
27
Issue:
2011 3
Page:
275-279
Research Field:
Environmental Science and Engineering
Publishing date:
2011-09-30

Info

Title:
Enhanced photocatalytic degradation of sulfadiazine by Fe3+in aqueous TiO2 suspension
Author(s):
Zhang Junwei1 2 Fu Dafang1 Yang Lili3 Deng Lin1 Sun Yue1
1 School of Civil Engineering, Southeast University, Nanjing 210096, China
2 School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China
3 Nanjing Environmental Monitoring Centre, Nanjing 2
Keywords:
TiO2 photocatalytic degradation sulfadiazine Fe3+ enhancement
PACS:
X592
DOI:
10.3969/j.issn.1003-7985.2011.03.010
Abstract:
In order to explore the reaction mechanism of Fe3+ and the mineralization effect of the micropollutant, Fe3+-assisted photocatalytic oxidation of sulfadiazine(SD)in the TiO2 suspended solution is investigated. The effect of Fe3+participation, the degradation kinetics of SD, the effect of SD mineralization and the possible mechanism of Fe3+ participation in TiO2 suspension are analyzed by adding FeCl3, taking samples at a given time and determining the SD concentration. Results indicate that the degradation of SD catalyzed by TiO2/Fe3+ is faster than that catalyzed by TiO2 or Fe3+separately. The photocatalytic degradation of SD follows the pseudo-first-order kinetics model in a range of 20 to 80 mg/L of initial concentration. The mineralization rate of SD can be enhanced by the addition of Fe3+ in the TiO2 suspended solution. The mechanism of the rapid degradation of SD is proposed, which indicates that Fe3+ adsorbed on the surface of TiO2 particles acts as an electron acceptor. The amount of recombining electron-hole pairs decreases, and the amount of hydroxyl radicals increases. The increased hydroxyl radical strengthens the degradation of SD in the TiO2/Fe3+ suspended solution.

References:

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Memo

Memo:
Biographies: Zhang Junwei(1981—), male, graduate; Fu Dafang(corresponding author), male, doctor, professor, fdf@seu.edu.cn.
Foundation items: The Priority Academic Program Development of Jiangsu Higher Education Institutions(No.1105007001), the Ph.D. Programs Foundation of Ministry of Education of China(No.20100092120018), the Natural Science Foundation of Jiangsu Province(No.BK2009453).
Citation: Zhang Junwei, Fu Dafang, Yang Lili, et al. Enhanced photocatalytic degradation of sulfadiazine by Fe3+ in aqueous TiO2 suspension[J].Journal of Southeast University(English Edition), 2011, 27(3):275-279.[doi:10.3969/j.issn.1003-7985.2011.03.010]
Last Update: 2011-09-20