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المؤلفPark, Jiyeon
المؤلفLim, Jonghun
المؤلفPark, Yiseul
المؤلفHan, Dong Suk
المؤلفShon, Ho Kyong
المؤلفHoffmann, Michael R.
المؤلفPark, Hyunwoong
تاريخ الإتاحة2022-12-19T10:18:23Z
تاريخ النشر2020-06-16
اسم المنشورEnvironmental Science and Technology
المعرّفhttp://dx.doi.org/10.1021/acs.est.0c01550
الاقتباسPark, J., Lim, J., Park, Y., Han, D. S., Shon, H. K., Hoffmann, M. R., & Park, H. (2020). In situ-generated reactive oxygen species in precharged titania and tungsten trioxide composite catalyst membrane filters: Application to as (III) oxidation in the absence of irradiation. Environmental science & technology, 54(15), 9601-9608.
الرقم المعياري الدولي للكتاب0013-936X
معرّف المصادر الموحدhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85088981224&origin=inward
معرّف المصادر الموحدhttp://hdl.handle.net/10576/37393
الملخصThis study demonstrates that in situ-generated reactive oxygen species (ROSs) in prephotocharged TiO2 and WO3 (TW) composite particle-embedded inorganic membrane filters oxidize arsenite (As(III)) into arsenate (As(V)) without any auxiliary chemical oxidants under ambient conditions in the dark. TW membrane filters have been charged with UV or simulated sunlight and subsequently transferred to a once-through flow-type system. The charged TW filters can transfer the stored electrons to dissolved O2, producing ROSs that mediate As(III) oxidation in the dark. Dramatic inhibition of As(V) production with O2 removal or addition of ROS quenchers indicates an ROS-mediated As(III) oxidation mechanism. Electron paramagnetic spectroscopic analysis has confirmed the formation of the HO2â¢/O2â¢- pair in the dark. The WO3 fraction in the TW filter significantly influences the performance of the As(III) oxidation, while As(V) production is enhanced with increasing charging time and solution pH. The As(III) oxidation is terminated when the singly charged TW filter is fully discharged; however, recharging of TW recovers the catalytic activity for As(III) oxidation. The proposed oxidation process using charged TW membrane filters is practical and environmentally benign for the continuous treatment of As(III)-contaminated water during periods of unavailability of sunlight.
راعي المشروع- Qatar National Research Fund (QNRF) - grant #NPRP 10-1210-160019. - National Research Foundation of Korea (NRF) - grant #2018R1A6A1A03024962, 2019M1A2A2065616, 2019R1A2C2002602.
اللغةen
الناشرAmerican Chemical Society (ACS)
الموضوعSpectroscopic analysis
Oxidize arsenite
Contaminated water
العنوانIn Situ-Generated Reactive Oxygen Species in Precharged Titania and Tungsten Trioxide Composite Catalyst Membrane Filters: Application to As(III) Oxidation in the Absence of Irradiation
النوعArticle
الصفحات9601-9608
رقم العدد15
رقم المجلد54
ESSN1520-5851
dc.accessType Abstract Only


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