TY  - JOUR
AU  - Presumido, Pedro H.
AU  - dos Santos, Lucrecio F.
AU  - Neuparth, Teresa
AU  - Santos, Miguel M.
AU  - Feliciano, Manuel
AU  - Primo, Ana
AU  - Garcia, Hermenegildo
AU  - Đolić, Maja
AU  - Vilar, Vitor J. P.
PY  - 2022
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5019
AB  - This work presents a ceramic tubular membrane coated with a continuous graphene-TiO2 nanocomposite thin-film for contaminants of emerging concern (CECs) removal from synthetic and real matrices in single-pass flow-through operation. Microfiltration ceramic membranes were coated in situ with graphene (G)-TiO2-P25 nano-composite using two different methods: Membrane type A - TiO2-P25 incorporated in the G preparation stage (1% [MA-1], 2% [MA-2] and 3% [MA-3] [w/v]), and Membrane type B - TiO2-P25 thin-film uniformly coated over the G film surface (coating layers: 3 [MB-1], 6 [MB-2], and 9 [MB-3]). After the catalyst deposition and before the pyrolysis step, air was forced to pass through the membranes pores (inside-outside mode), providing a porous film. The CECs solution (diclofenac-DCF, 17 beta-estradiol-E2, 17 alpha-ethinylestradiol-EE2 and amoxicillin-AMX) was prepared using Ultrapure water (UPW) or an urban wastewater after secondary treatment (UWW) fortified with 500 mu g L-1 of each CEC. Membranes were characterized by the following techniques: Scanning Electron Microscopy (SEM), Atomic Force Microscopy (AFM), Fourier-Transform Infrared spectroscopy (FTIR), Diffuse Reflectance UV-Visible spectroscopy (DR UV-Vis) and Raman spectroscopy. The membranes coated with MA-3 and MB-2 catalyst films, irradiated by UVA light, showed the highest ability for CECs removal. Furthermore, the Relative flux reduction ratio (RFR) decreased around 45% in the absence of UVA light, owing to membrane fouling. The combination of filtration and oxidation (G-TiO2-UVA) provided a permeate with higher quality and minimized membrane fouling. Although membrane type B allowed for a permeate with higher quality, membrane type A provided a higher permeate flux.
T2  - Chemical Engineering Journal
T1  - A Novel ceramic tubular membrane coated with a continuous graphene-TiO2 nanocomposite thin-film for CECs mitigation
VL  - 430
DO  - 10.1016/j.cej.2021.132639
ER  - 

@article{
author = "Presumido, Pedro H. and dos Santos, Lucrecio F. and Neuparth, Teresa and Santos, Miguel M. and Feliciano, Manuel and Primo, Ana and Garcia, Hermenegildo and Đolić, Maja and Vilar, Vitor J. P.",
year = "2022",
abstract = "This work presents a ceramic tubular membrane coated with a continuous graphene-TiO2 nanocomposite thin-film for contaminants of emerging concern (CECs) removal from synthetic and real matrices in single-pass flow-through operation. Microfiltration ceramic membranes were coated in situ with graphene (G)-TiO2-P25 nano-composite using two different methods: Membrane type A - TiO2-P25 incorporated in the G preparation stage (1% [MA-1], 2% [MA-2] and 3% [MA-3] [w/v]), and Membrane type B - TiO2-P25 thin-film uniformly coated over the G film surface (coating layers: 3 [MB-1], 6 [MB-2], and 9 [MB-3]). After the catalyst deposition and before the pyrolysis step, air was forced to pass through the membranes pores (inside-outside mode), providing a porous film. The CECs solution (diclofenac-DCF, 17 beta-estradiol-E2, 17 alpha-ethinylestradiol-EE2 and amoxicillin-AMX) was prepared using Ultrapure water (UPW) or an urban wastewater after secondary treatment (UWW) fortified with 500 mu g L-1 of each CEC. Membranes were characterized by the following techniques: Scanning Electron Microscopy (SEM), Atomic Force Microscopy (AFM), Fourier-Transform Infrared spectroscopy (FTIR), Diffuse Reflectance UV-Visible spectroscopy (DR UV-Vis) and Raman spectroscopy. The membranes coated with MA-3 and MB-2 catalyst films, irradiated by UVA light, showed the highest ability for CECs removal. Furthermore, the Relative flux reduction ratio (RFR) decreased around 45% in the absence of UVA light, owing to membrane fouling. The combination of filtration and oxidation (G-TiO2-UVA) provided a permeate with higher quality and minimized membrane fouling. Although membrane type B allowed for a permeate with higher quality, membrane type A provided a higher permeate flux.",
journal = "Chemical Engineering Journal",
title = "A Novel ceramic tubular membrane coated with a continuous graphene-TiO2 nanocomposite thin-film for CECs mitigation",
volume = "430",
doi = "10.1016/j.cej.2021.132639"
}

Presumido, P. H., dos Santos, L. F., Neuparth, T., Santos, M. M., Feliciano, M., Primo, A., Garcia, H., Đolić, M.,& Vilar, V. J. P.. (2022). A Novel ceramic tubular membrane coated with a continuous graphene-TiO2 nanocomposite thin-film for CECs mitigation. in Chemical Engineering Journal, 430.
https://doi.org/10.1016/j.cej.2021.132639

Presumido PH, dos Santos LF, Neuparth T, Santos MM, Feliciano M, Primo A, Garcia H, Đolić M, Vilar VJP. A Novel ceramic tubular membrane coated with a continuous graphene-TiO2 nanocomposite thin-film for CECs mitigation. in Chemical Engineering Journal. 2022;430.
doi:10.1016/j.cej.2021.132639 .

Presumido, Pedro H., dos Santos, Lucrecio F., Neuparth, Teresa, Santos, Miguel M., Feliciano, Manuel, Primo, Ana, Garcia, Hermenegildo, Đolić, Maja, Vilar, Vitor J. P., "A Novel ceramic tubular membrane coated with a continuous graphene-TiO2 nanocomposite thin-film for CECs mitigation" in Chemical Engineering Journal, 430 (2022),
https://doi.org/10.1016/j.cej.2021.132639 . .

TY  - JOUR
AU  - Novack, Aline M.
AU  - dos Reis, Glaydson S.
AU  - Hackbarth, Fabiola, V
AU  - Marinho, Belisa A.
AU  - Đolić, Maja
AU  - Valle, Jose A. B.
AU  - Sampaio, Carlos H.
AU  - Lima, Eder C.
AU  - Dotto, Guillherme L.
AU  - Ulson de Souza, Antonio Augusto
AU  - Vilar, Vitor J. P.
AU  - Guelli Ulson de Souza, Selene M. A.
PY  - 2021
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/19
AB  - This paper presents the synthesis of a hybrid material through the use of natural pozzolan and titanium(IV) isopropoxide using the sol-gel method and its application in the photocatalytic hexavalent chromium reduction. The characterization data indicated a mesoporous material possessing a surface area of 271.7 m(2) g(-1). The morphology studies (SEM and TEM) showed nanosheet hybrid structures. The analysis of DRUV, FTIR, XRD, and Mossbauer spectroscopy provides a different electronic structure of the synthetized material when compared with the originals, proving the hybridization process between pozzolan and titanium(IV) isopropoxide. The photocatalytic reduction of Cr(VI) to Cr(III) using the hybrid material showed a better performance than conventional photocatalysts (precursor and TiO2-P25). Operational conditions such as chromium initial concentration (0.02-0.20 mM), solution pH (3-6), and type of scavenger (citric or tartaric acid) were evaluated in order to determine the best experimental conditions for the Cr(VI) photoreduction. At their optimum (catalyst load of 15 mg L-1, tartaric acid as scavenger, [scavenger](0)/[Cr(VI)](0) M ratio = 3:1, pH 3, and 25 degrees C), the total photoreduction of 0.20 mM Cr(VI) was achieved in 180 min. The novel hybrid materials synthesized from pozzolan and titanium(IV) isopropoxide showed to be a potential catalyst for the Cr(VI) reduction in aqueous solution.
PB  - Springer Heidelberg, Heidelberg
T2  - Environmental Science and Pollution Research
T1  - Facile fabrication of hybrid titanium(IV) isopropoxide/pozzolan nanosheets (TnS-Pz) of high photocatalytic activity: characterization and application for Cr(VI) reduction in an aqueous solution
EP  - 23581
IS  - 19
SP  - 23568
VL  - 28
DO  - 10.1007/s11356-020-09178-1
ER  - 

@article{
author = "Novack, Aline M. and dos Reis, Glaydson S. and Hackbarth, Fabiola, V and Marinho, Belisa A. and Đolić, Maja and Valle, Jose A. B. and Sampaio, Carlos H. and Lima, Eder C. and Dotto, Guillherme L. and Ulson de Souza, Antonio Augusto and Vilar, Vitor J. P. and Guelli Ulson de Souza, Selene M. A.",
year = "2021",
abstract = "This paper presents the synthesis of a hybrid material through the use of natural pozzolan and titanium(IV) isopropoxide using the sol-gel method and its application in the photocatalytic hexavalent chromium reduction. The characterization data indicated a mesoporous material possessing a surface area of 271.7 m(2) g(-1). The morphology studies (SEM and TEM) showed nanosheet hybrid structures. The analysis of DRUV, FTIR, XRD, and Mossbauer spectroscopy provides a different electronic structure of the synthetized material when compared with the originals, proving the hybridization process between pozzolan and titanium(IV) isopropoxide. The photocatalytic reduction of Cr(VI) to Cr(III) using the hybrid material showed a better performance than conventional photocatalysts (precursor and TiO2-P25). Operational conditions such as chromium initial concentration (0.02-0.20 mM), solution pH (3-6), and type of scavenger (citric or tartaric acid) were evaluated in order to determine the best experimental conditions for the Cr(VI) photoreduction. At their optimum (catalyst load of 15 mg L-1, tartaric acid as scavenger, [scavenger](0)/[Cr(VI)](0) M ratio = 3:1, pH 3, and 25 degrees C), the total photoreduction of 0.20 mM Cr(VI) was achieved in 180 min. The novel hybrid materials synthesized from pozzolan and titanium(IV) isopropoxide showed to be a potential catalyst for the Cr(VI) reduction in aqueous solution.",
publisher = "Springer Heidelberg, Heidelberg",
journal = "Environmental Science and Pollution Research",
title = "Facile fabrication of hybrid titanium(IV) isopropoxide/pozzolan nanosheets (TnS-Pz) of high photocatalytic activity: characterization and application for Cr(VI) reduction in an aqueous solution",
pages = "23581-23568",
number = "19",
volume = "28",
doi = "10.1007/s11356-020-09178-1"
}

Novack, A. M., dos Reis, G. S., Hackbarth, F. V., Marinho, B. A., Đolić, M., Valle, J. A. B., Sampaio, C. H., Lima, E. C., Dotto, G. L., Ulson de Souza, A. A., Vilar, V. J. P.,& Guelli Ulson de Souza, S. M. A.. (2021). Facile fabrication of hybrid titanium(IV) isopropoxide/pozzolan nanosheets (TnS-Pz) of high photocatalytic activity: characterization and application for Cr(VI) reduction in an aqueous solution. in Environmental Science and Pollution Research
Springer Heidelberg, Heidelberg., 28(19), 23568-23581.
https://doi.org/10.1007/s11356-020-09178-1

Novack AM, dos Reis GS, Hackbarth FV, Marinho BA, Đolić M, Valle JAB, Sampaio CH, Lima EC, Dotto GL, Ulson de Souza AA, Vilar VJP, Guelli Ulson de Souza SMA. Facile fabrication of hybrid titanium(IV) isopropoxide/pozzolan nanosheets (TnS-Pz) of high photocatalytic activity: characterization and application for Cr(VI) reduction in an aqueous solution. in Environmental Science and Pollution Research. 2021;28(19):23568-23581.
doi:10.1007/s11356-020-09178-1 .

Novack, Aline M., dos Reis, Glaydson S., Hackbarth, Fabiola, V, Marinho, Belisa A., Đolić, Maja, Valle, Jose A. B., Sampaio, Carlos H., Lima, Eder C., Dotto, Guillherme L., Ulson de Souza, Antonio Augusto, Vilar, Vitor J. P., Guelli Ulson de Souza, Selene M. A., "Facile fabrication of hybrid titanium(IV) isopropoxide/pozzolan nanosheets (TnS-Pz) of high photocatalytic activity: characterization and application for Cr(VI) reduction in an aqueous solution" in Environmental Science and Pollution Research, 28, no. 19 (2021):23568-23581,
https://doi.org/10.1007/s11356-020-09178-1 . .

TY  - JOUR
AU  - Costa, Tamires C.
AU  - Soares, Petrick A.
AU  - Campos, Carlos E.M.
AU  - Souza, Antonio A.U.
AU  - Đolić, Maja
AU  - Vilar, Vitor J. P.
AU  - Souza, Selene M. A. G. U.
PY  - 2019
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4319
AB  - This work examines the mill scale (MS) of hot rolling, a waste product formed in industrial steel processing. MS was evaluated as an iron source in promoting the oxidation of Reactive Red 120 azo dye in location-sourced and factory textile wastewater through a Fenton reaction (FR), as well as reducing hexavalent chromium species to its trivalent form in the presence of an organic ligand (citric acid). The MS was characterised by various techniques and the results showed that iron is the major compound in its composition and occurs mainly in the form of oxides (wustite, hematite and magnetite). In addition, it has ferromagnetic properties, which facilitate its separation. In the oxidation tests it was observed that acidic pH conditions promoted a positive influence on the reaction efficiency and that the presence of H2O2 can limit the leaching of iron into the solution. The best experimental conditions for colour removal from a RR 120 dye solution containing 35 mg L-1 were 15 g L-1 of MS, 0.5 mM H2O2, pH 3, 25 degrees C, 200 +/- 2 rpm and 120 min. Furthermore, the homogeneous Fenton reaction showed a significant contribution to decolourisation, but the heterogeneous phase cannot be neglected since it is predominant at the beginning of the reactions. In the continuous process, the influence of the H2O2 concentration and the feed rate was evaluated, obtaining an optimal dose of 0.5 mM H2O2 for the RR dye 120 and 0.7 mM H2O2 for the real textile effluent, with a flow rate of 0.25 mL min(-1) and pH 3 for both. Subsequently, the residue was evaluated as the source of iron in the process of reducing Cr(VI) to Cr(III). An increase in the efficiency of the reaction in the presence of citric acid was observed, associated with the removal of the surface oxide layer through the formation of soluble Fe(III)-Cr(III)-ligand complexes and the consequent increase of the iron redox cycle, reducing it to sequencing the reduction of chromium. 100% reduction was obtained in 30 min of reaction using 20 g L-1 of MS, at pH 3 and Cr(VI):citric acid ratio of 1:4. In continuous operation mode, 100% Cr(VI) reduction was obtained during 50 h (1.0 mL min(-1) flow rate), dropping to 20% with increasing flow rate to 4.0 mL min-1 after 200 h of assay.
PB  - Elsevier Sci Ltd, Oxford
T2  - Journal of Cleaner Production
T1  - Industrial steel waste as an iron source to promote heterogeneous and homogeneous oxidation/reduction reactions
EP  - 817
SP  - 804
VL  - 211
DO  - 10.1016/j.jclepro.2018.11.201
ER  - 

@article{
author = "Costa, Tamires C. and Soares, Petrick A. and Campos, Carlos E.M. and Souza, Antonio A.U. and Đolić, Maja and Vilar, Vitor J. P. and Souza, Selene M. A. G. U.",
year = "2019",
abstract = "This work examines the mill scale (MS) of hot rolling, a waste product formed in industrial steel processing. MS was evaluated as an iron source in promoting the oxidation of Reactive Red 120 azo dye in location-sourced and factory textile wastewater through a Fenton reaction (FR), as well as reducing hexavalent chromium species to its trivalent form in the presence of an organic ligand (citric acid). The MS was characterised by various techniques and the results showed that iron is the major compound in its composition and occurs mainly in the form of oxides (wustite, hematite and magnetite). In addition, it has ferromagnetic properties, which facilitate its separation. In the oxidation tests it was observed that acidic pH conditions promoted a positive influence on the reaction efficiency and that the presence of H2O2 can limit the leaching of iron into the solution. The best experimental conditions for colour removal from a RR 120 dye solution containing 35 mg L-1 were 15 g L-1 of MS, 0.5 mM H2O2, pH 3, 25 degrees C, 200 +/- 2 rpm and 120 min. Furthermore, the homogeneous Fenton reaction showed a significant contribution to decolourisation, but the heterogeneous phase cannot be neglected since it is predominant at the beginning of the reactions. In the continuous process, the influence of the H2O2 concentration and the feed rate was evaluated, obtaining an optimal dose of 0.5 mM H2O2 for the RR dye 120 and 0.7 mM H2O2 for the real textile effluent, with a flow rate of 0.25 mL min(-1) and pH 3 for both. Subsequently, the residue was evaluated as the source of iron in the process of reducing Cr(VI) to Cr(III). An increase in the efficiency of the reaction in the presence of citric acid was observed, associated with the removal of the surface oxide layer through the formation of soluble Fe(III)-Cr(III)-ligand complexes and the consequent increase of the iron redox cycle, reducing it to sequencing the reduction of chromium. 100% reduction was obtained in 30 min of reaction using 20 g L-1 of MS, at pH 3 and Cr(VI):citric acid ratio of 1:4. In continuous operation mode, 100% Cr(VI) reduction was obtained during 50 h (1.0 mL min(-1) flow rate), dropping to 20% with increasing flow rate to 4.0 mL min-1 after 200 h of assay.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Journal of Cleaner Production",
title = "Industrial steel waste as an iron source to promote heterogeneous and homogeneous oxidation/reduction reactions",
pages = "817-804",
volume = "211",
doi = "10.1016/j.jclepro.2018.11.201"
}

Costa, T. C., Soares, P. A., Campos, C. E.M., Souza, A. A.U., Đolić, M., Vilar, V. J. P.,& Souza, S. M. A. G. U.. (2019). Industrial steel waste as an iron source to promote heterogeneous and homogeneous oxidation/reduction reactions. in Journal of Cleaner Production
Elsevier Sci Ltd, Oxford., 211, 804-817.
https://doi.org/10.1016/j.jclepro.2018.11.201

Costa TC, Soares PA, Campos CE, Souza AA, Đolić M, Vilar VJP, Souza SMAGU. Industrial steel waste as an iron source to promote heterogeneous and homogeneous oxidation/reduction reactions. in Journal of Cleaner Production. 2019;211:804-817.
doi:10.1016/j.jclepro.2018.11.201 .

Costa, Tamires C., Soares, Petrick A., Campos, Carlos E.M., Souza, Antonio A.U., Đolić, Maja, Vilar, Vitor J. P., Souza, Selene M. A. G. U., "Industrial steel waste as an iron source to promote heterogeneous and homogeneous oxidation/reduction reactions" in Journal of Cleaner Production, 211 (2019):804-817,
https://doi.org/10.1016/j.jclepro.2018.11.201 . .