标题: A novel application of Fe2TiO5 in sulfite-mediated photocatalytic oxidation of emerging contaminants in water
作者: Guo, JT (Guo, Juntao); Ku, YB (Ku, Yanbang); Wang, WY (Wang, Wenyu); Wu, F (Wu, Feng); Luo, LT (Luo, Liting)
来源出版物: JOURNAL OF WATER PROCESS ENGINEERING 卷: 77 文献号: 108462 DOI: 10.1016/j.jwpe.2025.108462 Published Date: 2025 SEP
摘要: As Iron(III) titanium oxide (Fe2TiO5) and sulfite (S(IV)) are principally presented respectively as the by-products in such ilmenite smelting slag as well as flue gas desulphurization industrial process, it would be of extreme environmental value whether a particular technology development could be realized with their resource utilization. Herein, a molecular oxygen activation system for achieving efficient contaminant degradation was developed based on the coupling and utilizing of Fe2TiO5 and S(IV) under simulated sunlight irradiation. Impressively, the as-constructed Light-Fe2TiO5-S(IV) system exhibited extensive degradation capacity on several organic pollutants represented by acetaminophen (APAP), where 5 mu M of APAP can be removed up to 93.4 % within 60 min under mild conditions ([S(IV)] = 1 mM, [Fe2TiO5] = 0.4 g/L, pH = 6, simulated sunlight irradiation). The reaction mechanism involved in the heterogeneous interfacial process has been extensively investigated. Sulfate radicals (SO4 center dot-) generated during this process are identified as the predominant species responsible for substrate decomposition. Moreover, the enhanced molecular oxygen activation pathway mediated by photogenerated carriers in the presence of S(IV) was elucidated through a series of characterizations and scavenging experiments. A reaction mechanism scheme depicting the radical-mediated degradation pathway of APAP was subsequently proposed. Finally, the robustness and versatility of the Light-Fe2TiO5-S(IV) system were assessed via parallel experiments under diverse conditions, including different contaminants, external influences, and irradiation sources. This work successfully constructed a Light-Fe2TiO5-S(IV) molecular oxygen activation system, achieving efficient degradation of organic pollutants through synergistic photocatalysis and radical oxidation processes.
作者关键词: Iron(III) titanium oxide; Sulfite-based AOP; Photocatalytic oxidation; Acetaminophen degradation; Molecular oxygen activation
KeyWords Plus: AQUEOUS-SOLUTION; RATE CONSTANTS; WASTE-WATER; DEGRADATION; SULFATE; SYSTEM; ACTIVATION; POLLUTANTS; REDUCTION; ACETAMINOPHEN
地址: [Guo, Juntao; Ku, Yanbang; Wang, Wenyu; Wu, Feng] Wuhan Univ, Hubei Biomass Resource Chem & Environm, Sch Resources & Environm Sci, Wuhan 430079, Peoples R China.
[Luo, Liting] Chinese Acad Sci, Innovat Acad Precis Measurement Sci & Technol, Natl Ctr Magnet Resonance Wuhan,Wuhan Inst Phys &, State Key Lab Magnet Resonance Spect & Imaging, Wuhan 430071, Peoples R China.
通讯作者地址: Wu, F (通讯作者)，Wuhan Univ, Hubei Biomass Resource Chem & Environm, Sch Resources & Environm Sci, Wuhan 430079, Peoples R China.
Luo, LT (通讯作者)，Chinese Acad Sci, Innovat Acad Precis Measurement Sci & Technol, Natl Ctr Magnet Resonance Wuhan,Wuhan Inst Phys &, State Key Lab Magnet Resonance Spect & Imaging, Wuhan 430071, Peoples R China.
电子邮件地址: [email protected]; [email protected]
影响因子：6.7
