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Ziadi I, Alves MM, Taryba M, El-Bassi L, Hassairi H, Bousselmi L, Montemor MF, Akrout H. Microbiologically influenced corrosion mechanism of 304L stainless steel in treated urban wastewater and protective effect of silane-TiO 2 coating. Bioelectrochemistry 2019; 132:107413. [PMID: 31816578 DOI: 10.1016/j.bioelechem.2019.107413] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Revised: 11/08/2019] [Accepted: 11/08/2019] [Indexed: 12/14/2022]
Abstract
Microbiologically influenced corrosion (MIC) of bare and silane-TiO2 sol-gel coated stainless steel (SS) was studied in treated urban wastewater (TUWW). Combining the electrochemical impedance spectroscopy (EIS) and the scanning vibrating electrode technique (SVET) showed that SS surface colonization occurs, at earlier stages, by iron-oxidizing bacteria (IOB), and later by sulphate-reducing bacteria (SRB). The SVET results showed that chemical corrosion process and bacterial respiration led to the depletion of dissolved oxygen, creating a differential aeration cell and thus a localized corrosion phenomenon. Scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) showed that the growth of a bacterial biofilm on 304L SS was a dynamic process, stimulating the localized oxidation of SS. To improve corrosion protection, a silane-TiO2 sol-gel coating for SS is proposed. SEM showed that the coating reduced bacterial adhesion and EIS study demonstrated that the coating improved the barrier properties and corrosion resistance of 304L SS in TUWW over a short period of immersion.
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Affiliation(s)
- I Ziadi
- Laboratory for Wastewaters and Environment, Centre of Water Researches and Technologies (CERTE) Technopark of Borj Cedria PB 273, Soliman 8020, Tunisia; National Institute of Applied Science and Technology (INSAT), Carthage University, Tunis, Tunisia
| | - M M Alves
- CQE, Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, Lisboa 1049-001, Portugal
| | - M Taryba
- CQE, Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, Lisboa 1049-001, Portugal
| | - L El-Bassi
- Laboratory for Wastewaters and Environment, Centre of Water Researches and Technologies (CERTE) Technopark of Borj Cedria PB 273, Soliman 8020, Tunisia
| | - H Hassairi
- Laboratory for Wastewaters and Environment, Centre of Water Researches and Technologies (CERTE) Technopark of Borj Cedria PB 273, Soliman 8020, Tunisia
| | - L Bousselmi
- Laboratory for Wastewaters and Environment, Centre of Water Researches and Technologies (CERTE) Technopark of Borj Cedria PB 273, Soliman 8020, Tunisia
| | - M F Montemor
- CQE, Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, Lisboa 1049-001, Portugal
| | - H Akrout
- Laboratory for Wastewaters and Environment, Centre of Water Researches and Technologies (CERTE) Technopark of Borj Cedria PB 273, Soliman 8020, Tunisia. @gmail.com
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Abstract
Electrophoretic deposition was used to produce titanium dioxide (TiO2) nanostructured films on copper substrate in aqueous media for photocatalytic application. Polyvinyl pyrrolidone (PVP) with a weight rate from 0 to 15% was added to TiO2 P25 suspension in order to enhance film adhesion. The films were characterized by X-ray diffraction, optical microscopy, contact angle measurement, nanoindentation, scratch test and photoluminescence. The photocatalytic activity of the films was tested with amido black 10B under UV irradiation. The results indicated that the morphology and the mechanical properties of films depended on the added PVP amount. Scratch test showed that adhesion strength rose with increased PVP amount. The photocatalytic activity indicated that TiO2 film synthesized with 13% PVP had the highest efficiency.
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Affiliation(s)
- M Laamari
- Laboratory of Waste Water Treatment, Centre of Water Researches and Technologies, Technopark Borj Cedria, BP 273, 8020 Soliman, Tunisia E-mail:
| | - A Ben Youssef
- Laboratory of Waste Water Treatment, Centre of Water Researches and Technologies, Technopark Borj Cedria, BP 273, 8020 Soliman, Tunisia E-mail:
| | - L Bousselmi
- Laboratory of Waste Water Treatment, Centre of Water Researches and Technologies, Technopark Borj Cedria, BP 273, 8020 Soliman, Tunisia E-mail:
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Atyaoui A, Cachet H, Sutter EMM, Bousselmi L. Effect of the anodization voltage on the dimensions and photoactivity of titania nanotubes arrays. SURF INTERFACE ANAL 2013. [DOI: 10.1002/sia.5317] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- A. Atyaoui
- Laboratoire de Traitement des Eaux Usées; Centre de Recherches et Technologies des Eaux; BP. 273 8020 Soliman Tunisia
- LISE, UPR 15 du CNRS; Université Pierre et Marie Curie; Case 133, 4 Place Jussieu 75252 Paris Cedex 05 France
| | - H. Cachet
- LISE, UPR 15 du CNRS; Université Pierre et Marie Curie; Case 133, 4 Place Jussieu 75252 Paris Cedex 05 France
| | - E. M. M. Sutter
- LISE, UPR 15 du CNRS; Université Pierre et Marie Curie; Case 133, 4 Place Jussieu 75252 Paris Cedex 05 France
| | - L. Bousselmi
- Laboratoire de Traitement des Eaux Usées; Centre de Recherches et Technologies des Eaux; BP. 273 8020 Soliman Tunisia
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Atyaoui A, Bousselmi L, Cachet H, Pu P, Sutter E. Influence of geometric and electronic characteristics of TiO2 electrodes with nanotubular array on their photocatalytic efficiencies. J Photochem Photobiol A Chem 2011. [DOI: 10.1016/j.jphotochem.2011.09.009] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Akrout H, Bousselmi L, Triki E. The inhibition effect of two commercial compounds on interface steel/natural softened water. Surf Engin Appl Electrochem 2010. [DOI: 10.3103/s1068375510050091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Tizaoui C, Mansouri L, Bousselmi L. Ozone catalysed with solids as an advanced oxidation process for landfill leachate treatment. Water Sci Technol 2007; 55:237-43. [PMID: 17674854 DOI: 10.2166/wst.2007.414] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Heterogeneous catalytic ozonation (HCO) of wastewater is gaining both research and industrial interests. It is proved to be an advanced oxidation process since it involves hydroxyl radicals as oxidation species. Few studies have been carried out to test HCO in the treatment of landfill leachates. This work has been carried out to test three types of catalysts: activated carbon (AC), expanded perlite (EP) and titanium dioxide (TiO2) combined with ozone at 80 g/m3 gas concentration for the treatment of a leachate generated by Jebel Chakir landfill site near Tunis-capital of Tunisia. The work has shown a reduction in COD of about 45% and an increase in biodegradability (BOD5/COD) from 0.1 to 0.34. A catalyst concentration of 0.7 g/L was found optimal for the treatment of the leachate.
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Affiliation(s)
- C Tizaoui
- School of Engineering, Design and Technology, University of Bradford, Bradford, UK.
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Abstract
Biological pre-treated landfill leachates of Djebel Chakir contains some macromolecular organic substances that are resistant to biological degradation. The aim of the present work is to assess the feasibility of removing refractory organic pollutants in biological pre-treated landfill leachate by solar photocatalyse process. Leachate pollutant contents are studied to assess their contribution to leachate pollution and their treatability by solar photocatalyse process. Phenol is chosen as model of pollutants, to evaluate its removal and the efficiency of the photocatalytic system. The experiments were carried out in suspended photocatalytic reactor, using TiO2 Degussa P25, under sunlight illumination (UV-A: 15-31 W/cm2). Under optimum operational conditions, applied to single reactant (phenol), the system presents a TOC removal of 90% (the degradation follows a first-order kinetic). Based on the TOC removal, the results shows that the degradation of biological pre-treated leachate follows a zero-order kinetic. After 5 h of sunlight exposure, 74% of COT is removed. The TOC removal is the best without any correction of the pH and at the TiO2 concentration of 2.5 g/L. The photocatalytic degradation of organic contaminants as well as the formation and disappearance of the by-products were followed by GC/MS. The solar photocatalysis processes induce several modifications of the matrix leading to more biodegradable forms: all the remaining and new compounds generated after the biological pre-treatment of leachate are degraded and other types of organics appear, mainly carboxylic acid, aliphatic hydrocarbons and phtalic acids.
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Affiliation(s)
- L Mansouri
- Laboratory of Wastewater Treatment and Recycling, National Institute of Scientific and Technical Research, BP 95 Hammam Lif 2050, Tunisia
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Bousselmi L, Geissen SU, Schroeder H. Textile wastewater treatment and reuse by solar catalysis: results from a pilot plant in Tunisia. Water Sci Technol 2004; 49:331-337. [PMID: 15077992] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Based on results from bench-scale flow-film-reactors (FFR) and aerated cascade photoreactors, a solar catalytic pilot plant has been built at the site of a textile factory. This plant has an illuminated surface area of 50 m2 and is designed for the treatment of 1 m3 h(-1) of wastewater. The preliminary results are presented and compared with a bench-scale FFR using textile wastewater and dichloroacetic acid. Equivalent degradation kinetics were obtained and it was demonstrated that the solar catalytic technology is able to remove recalcitrant compounds and color. However, on-site optimization is still necessary for wastewater reuse and for an economic application.
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Affiliation(s)
- L Bousselmi
- INRST, Laboratoire Eau and Environnement, B.P. 95, Hammam Lif, Tunisia.
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Geissen SU, Xi W, Weidemeyer A, Vogelpohl A, Bousselmi L, Ghrab A, Nnabi AE. Comparison of suspended and fixed photocatalytic reactor systems. Water Sci Technol 2001; 44:245-249. [PMID: 11695466] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Photocatalysis is a promising technology for the purification of pretreated wastewaters in sun-rich countries if an economically applicable reactor system is available. Within this project the catalyst separation as an essential process step of suspended reactor systems was investigated. For the separation of suspended catalyst a sedimentation basin with and without lamella and a membrane filtration were investigated. The sedimentation was found to be very sensitive to the kind of the ion background of wastewater, the pH, the TiO2 influent concentration as well as the hydrodynamics in the clarifier. Under optimized conditions effluent concentrations of less than 5 mg SS/L and a clear water without turbidity could be reached with a specific flow rate of up to 0.7 m3/m2/h. The best performance for P25 was achieved with a TiO2 influent concentration of 5 g/L. Membrane filtration was the only method to guarantee a complete retention of the TiO2 as well as a rejection of microorganisms and high molecular compounds. With cross-flow velocities of 3 m/s and a transmembrane pressure of 100 kPa flux rates up to 1,200 L/m2/h were achieved. A flow-film-reactor (FFR) was operated with the model compound DCA under identical conditions with fixed and suspended TiO2. Whereas the fixed system has the advantage that no separation step is necessary and a simple construction can be used, suspended systems offer a three times higher reaction velocity for a catalyst concentration of 10 g/L, but are also characterized by higher investment costs.
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Affiliation(s)
- S U Geissen
- Institut für Thermische Verfahrenstechnik, Clausthal University of Technology, Clausthal-Zellerfeld, Germany
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Bousselmi L, Fiaud C, Tribollet B, Triki E. Impedance spectroscopic study of a steel electrode in condition of scaling and corrosion. Electrochim Acta 1999. [DOI: 10.1016/s0013-4686(99)00151-6] [Citation(s) in RCA: 47] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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