[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]

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