Preparation of titanium dioxide (TiO2) from sludge produced by titanium tetrachloride (TiCl4) flocculation of wastewater

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Show simple item record Shon, HK Vigneswaran, S Kim, IS Cho, J Kim, GI Kim, JB Kim, J-H 2009-12-21T02:29:36Z 2007-02-15
dc.identifier.citation Environmental Science and Technology, 2007, 41 (4), pp. 1372 - 1377
dc.identifier.issn 0013-936X
dc.identifier.other C1 en_US
dc.description.abstract Sludge disposal is one of the most costly and environmentally problematic challenges of modern wastewater treatment worldwide. In this study, a new process was developed, which has a significant potential for lower cost of waste disposal, protection of the environment and public health, and yield of economically useful byproducts. Titanium oxide (TiO2), which is the most widely used metal oxide, was produced from the wastewater sludge generated by the flocculation of secondary wastewater with titanium tetrachloride (TiCl4). Detailed analyses were conducted to compare TiCl 4, ferric chloride (FeCl3), and aluminum sulfate (Al 2(SO4)3) flocculation. Removal of organic matter and different molecular sizes by Ti-salt flocculation was similar to that of the most widely used Fe- and Al-salt flocculation. The mean size of Ti-, Fe-, and Al-salt flocs was 47.5, 42.5, and 16.9 μm, respectively. The decantability of the settled flocs by TiCl4 coagulant was similar to that by FeCl3 coagulant and much higher than that of Al 2(SO4)3. The photocatalyst from wastewater (PFW) produced by TiCl4 flocculation was characterized by X-ray diffraction, BET surface area, scanning electron microscopy/energy dispersive X-ray, transmission electron microscopy, photocatalytic activity, and X-ray photoelectron spectroscopy. The resulting PFW was found to be superior to commercial TiO2 (P-25) in terms of photocatalytic activity and surface area. The PFW was also found to be mainly doped with C and P atoms. The atomic percentage of the PFW was TiO1.42C0.44P 0.14. © 2007 American Chemical Society.
dc.language eng
dc.relation.hasversion Accepted manuscript version en_US
dc.relation.isbasedon 10.1021/es062062g
dc.title Preparation of titanium dioxide (TiO2) from sludge produced by titanium tetrachloride (TiCl4) flocculation of wastewater
dc.type Journal Article
dc.parent Environmental Science and Technology
dc.journal.volume 4
dc.journal.volume 41
dc.journal.number 4 en_US
dc.publocation Washington DC, USA en_US
dc.publocation Sydney, Australia
dc.identifier.startpage 1372 en_US
dc.identifier.endpage 1377 en_US FEIT.School of Elec, Mech and Mechatronic Systems en_US
dc.conference Verified OK en_US
dc.conference Asia Pacific Economic Business History Conference
dc.for 090407 Process Control and Simulation
dc.for 090404 Membrane and Separation Technologies
dc.for 090409 Wastewater Treatment Processes
dc.personcode 900451
dc.personcode 995130
dc.percentage 34 en_US Process Control and Simulation en_US
dc.classification.type FOR-08 en_US 2007-02-12
dc.location.activity Sydney, Australia
pubs.embargo.period Not known
pubs.organisational-group /University of Technology Sydney
pubs.organisational-group /University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group /University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
pubs.organisational-group /University of Technology Sydney/Strength - Technology in Wastewater Treatment
utslib.copyright.status Closed Access 2015-04-15 12:23:47.074767+10
pubs.consider-herdc true
utslib.collection.history General (ID: 2)

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