TiO2 Photocatalyst Nanoparticle Separation: Flocculation in Different Matrices and Use of Powdered Activated Carbon as a Precoat in Low-Cost Fabric Filtration
Joint Authors
Liriano-Jorge, Carlos F.
Sohmen, Ugur
Özkan, Altan
Gulyas, Holger
Otterpohl, Ralf
Source
Advances in Materials Science and Engineering
Issue
Vol. 2014, Issue 2014 (31 Dec. 2014), pp.1-12, 12 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2014-02-22
Country of Publication
Egypt
No. of Pages
12
Abstract EN
Separation of photocatalyst nanoparticles is a problem impeding widespread application of photocatalytic oxidation.
As sedimentation of photocatalyst particles is facilitated by their flocculation, the influence of common constituents of biologically pretreated wastewaters (NaCl, NaHCO3, and their combination with humic acid sodium salt) on flocculation was tested by the pipet method.
Results showed that the impact of these substances on TiO2 nanoparticle flocculation is rather complex and strongly affected by pH.
When humic acid was present, TiO2 particles did not show efficient flocculation in the neutral and slightly basic pH range.
As an alternative to photocatalyst separation by sedimentation, precoat vacuum filtration with powdered activated carbon (PAC) over low-cost spunbond polypropylene fabrics was tested in the presence of two PAC types in aqueous NaCl and NaHCO3 solutions as well as in biologically treated greywater and in secondary municipal effluent.
PAC concentrations of ≥ 2 g/L were required in order to achieve a retention of nearly 95% of the TiO2 nanoparticles on the fabric filter when TiO2 concentration was 1 g/L.
Composition of the aqueous matrix and PAC type had a slight impact on precoat filtration.
PAC precoat filtration represents a potential pretreatment for photocatalyst removal by micro- or ultrafiltration.
American Psychological Association (APA)
Liriano-Jorge, Carlos F.& Sohmen, Ugur& Özkan, Altan& Gulyas, Holger& Otterpohl, Ralf. 2014. TiO2 Photocatalyst Nanoparticle Separation: Flocculation in Different Matrices and Use of Powdered Activated Carbon as a Precoat in Low-Cost Fabric Filtration. Advances in Materials Science and Engineering،Vol. 2014, no. 2014, pp.1-12.
https://search.emarefa.net/detail/BIM-1015744
Modern Language Association (MLA)
Liriano-Jorge, Carlos F.…[et al.]. TiO2 Photocatalyst Nanoparticle Separation: Flocculation in Different Matrices and Use of Powdered Activated Carbon as a Precoat in Low-Cost Fabric Filtration. Advances in Materials Science and Engineering No. 2014 (2014), pp.1-12.
https://search.emarefa.net/detail/BIM-1015744
American Medical Association (AMA)
Liriano-Jorge, Carlos F.& Sohmen, Ugur& Özkan, Altan& Gulyas, Holger& Otterpohl, Ralf. TiO2 Photocatalyst Nanoparticle Separation: Flocculation in Different Matrices and Use of Powdered Activated Carbon as a Precoat in Low-Cost Fabric Filtration. Advances in Materials Science and Engineering. 2014. Vol. 2014, no. 2014, pp.1-12.
https://search.emarefa.net/detail/BIM-1015744
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1015744