@article{MTMT:34513997, title = {Photocatalytic and surface properties of titanium dioxide nanoparticles in soil solutions}, url = {https://m2.mtmt.hu/api/publication/34513997}, author = {Solymos, Karolina and Babcsányi, Izabella and Ariya, Badam and Gyulavári, Tamás and Ágoston, Áron and Szamosvölgyi, Ákos and Kukovecz, Ákos and Kónya, Zoltán and Farsang, Andrea and Pap, Zsolt}, doi = {10.1039/D3EN00622K}, journal-iso = {ENVIRON SCI-NANO}, journal = {ENVIRONMENTAL SCIENCE-NANO}, volume = {11}, unique-id = {34513997}, issn = {2051-8153}, abstract = {Nanotechnology has emerged as a rapidly growing scientific field with diverse applications. Titanium dioxide nanoparticles are among the most commonly used nanoparticles due to their unique properties. However, their release...}, year = {2024}, eissn = {2051-8161}, pages = {1204-1216}, orcid-numbers = {Babcsányi, Izabella/0000-0003-0581-6343; Gyulavári, Tamás/0000-0001-6103-6689; Kukovecz, Ákos/0000-0003-0716-9557; Kónya, Zoltán/0000-0002-9406-8596; Farsang, Andrea/0000-0002-7873-5256; Pap, Zsolt/0000-0002-8049-0809} } @misc{MTMT:34409056, title = {Titanium dioxide hollow spheres for water treatment utilizing enhanced light trapping capability}, url = {https://m2.mtmt.hu/api/publication/34409056}, author = {Gyulavári, Tamás and Kata, Kovács and Zoltán, Kovács and Veréb, Gábor and Hernádi, Klára and Pap, Zsolt}, unique-id = {34409056}, year = {2023}, orcid-numbers = {Gyulavári, Tamás/0000-0001-6103-6689; Veréb, Gábor/0000-0001-9642-1851; Hernádi, Klára/0000-0001-9419-689X; Pap, Zsolt/0000-0002-8049-0809} } @CONFERENCE{MTMT:34409051, title = {Gyorskalcinálással előállított kalcium-titanátok fotokatalitikus aktivitásának és stabilitásának vizsgálata}, url = {https://m2.mtmt.hu/api/publication/34409051}, author = {Gyulavári, Tamás and Shah Abedi, Mahsa and Kukovecz, Ákos and Kónya, Zoltán and Pap, Zsolt}, booktitle = {XXIX. Nemzetközi Vegyészkonferencia / 29th International Conference on Chemistry}, unique-id = {34409051}, year = {2023}, orcid-numbers = {Gyulavári, Tamás/0000-0001-6103-6689; Kukovecz, Ákos/0000-0003-0716-9557; Kónya, Zoltán/0000-0002-9406-8596; Pap, Zsolt/0000-0002-8049-0809} } @CONFERENCE{MTMT:34407490, title = {Development of TiO2 and TiO2/CNT nanocomposite blended and grafted PVDF membranes used for membrane separation of oil emulsions}, url = {https://m2.mtmt.hu/api/publication/34407490}, author = {Miklós, Tímea and Gyulavári, Tamás and Hodúr, Cecilia and Hernádi, Klára and László, Zsuzsanna and Veréb, Gábor}, booktitle = {XXIX. Nemzetközi Vegyészkonferencia / 29th International Conference on Chemistry}, unique-id = {34407490}, year = {2023}, pages = {1-1}, orcid-numbers = {Gyulavári, Tamás/0000-0001-6103-6689; Hodúr, Cecilia/0000-0002-2028-6304; Hernádi, Klára/0000-0001-9419-689X; Veréb, Gábor/0000-0001-9642-1851} } @CONFERENCE{MTMT:34407456, title = {Effects of oil composition and CNT functionalizaton on the membrane filtration of oily wastewaters with TiO2/(f)CNT composite-coated PVDF membranes}, url = {https://m2.mtmt.hu/api/publication/34407456}, author = {Fazekas, Ákos Ferenc and Gyulavári, Tamás and Pap, Zsolt and Bodor, Attila and Laczi, Krisztián and Perei, Katalin and Nyergesné Illés, Erzsébet and László, Zsuzsanna and Veréb, Gábor}, booktitle = {XXIX. Nemzetközi Vegyészkonferencia / 29th International Conference on Chemistry}, unique-id = {34407456}, year = {2023}, pages = {1-1}, orcid-numbers = {Gyulavári, Tamás/0000-0001-6103-6689; Pap, Zsolt/0000-0002-8049-0809; Laczi, Krisztián/0000-0002-9399-7406; Perei, Katalin/0000-0001-8989-2284; Nyergesné Illés, Erzsébet/0000-0002-2901-9616; Veréb, Gábor/0000-0001-9642-1851} } @article{MTMT:34395096, title = {Noble metal nanoparticles and nanodiamond modified strontium titanate photocatalysts for room temperature CO production from direct hydrogenation of CO2}, url = {https://m2.mtmt.hu/api/publication/34395096}, author = {Yadav, Mohit and Gyulavári, Tamás and Kiss, János and Ábrahámné, Kornélia B. and Efremova, Anastasiia and Szamosvölgyi, Ákos and Pap, Zsolt and Sápi, András and Kukovecz, Ákos and Kónya, Zoltán}, doi = {10.1016/j.jcou.2023.102621}, journal-iso = {J CO2 UTIL}, journal = {JOURNAL OF CO2 UTILIZATION}, volume = {78}, unique-id = {34395096}, issn = {2212-9820}, year = {2023}, eissn = {2212-9839}, orcid-numbers = {Gyulavári, Tamás/0000-0001-6103-6689; Pap, Zsolt/0000-0002-8049-0809; Sápi, András/0000-0001-6557-0731; Kukovecz, Ákos/0000-0003-0716-9557; Kónya, Zoltán/0000-0002-9406-8596} } @{MTMT:34328535, title = {Ammonium removal from aqueous solution in presence of organic compounds, using biochar from banana leaves. Competitive isotherms models}, url = {https://m2.mtmt.hu/api/publication/34328535}, author = {Pantoja Alvarez, Fernanda Liceth and Beszédes, Sándor and Gyulavári, Tamás and Nyergesné Illés, Erzsébet and Kozma, Gábor and Sápi, András and László, Zsuzsanna}, booktitle = {Proceedings of the 29th International Symposium on Analytical and Environmental Problems}, unique-id = {34328535}, year = {2023}, pages = {46-46}, orcid-numbers = {Beszédes, Sándor/0000-0003-2301-765X; Gyulavári, Tamás/0000-0001-6103-6689; Nyergesné Illés, Erzsébet/0000-0002-2901-9616; Kozma, Gábor/0000-0003-2033-0720; Sápi, András/0000-0001-6557-0731} } @{MTMT:34191007, title = {Binary Adsorption by Bio-Adsorbents}, url = {https://m2.mtmt.hu/api/publication/34191007}, author = {Sukmana, Hadid and Ballai, Gergő and Gyulavári, Tamás and Nyergesné Illés, Erzsébet and Kozma, Gábor and Kónya, Zoltán and Hodúr, Cecilia}, booktitle = {BOOK OF ABSTRACTS VIII INTERNATIONAL CONFERENCE SUSTAINABLE POSTHARVEST AND FOOD TECHNOLOGIES AND XXXV SCIENTIFIC - PROFESSIONAL CONFERENCE PROCESSING AND ENERGY IN AGRICULTURE}, unique-id = {34191007}, year = {2023}, pages = {130}, orcid-numbers = {Gyulavári, Tamás/0000-0001-6103-6689; Nyergesné Illés, Erzsébet/0000-0002-2901-9616; Kozma, Gábor/0000-0003-2033-0720; Kónya, Zoltán/0000-0002-9406-8596; Hodúr, Cecilia/0000-0002-2028-6304} } @article{MTMT:34166716, title = {Effects of Different TiO2/CNT Coatings of PVDF Membranes on the Filtration of Oil-Contaminated Wastewaters}, url = {https://m2.mtmt.hu/api/publication/34166716}, author = {Fazekas, Ákos Ferenc and Gyulavári, Tamás and Pap, Zsolt and Bodor, Attila and Laczi, Krisztián and Perei, Katalin and Nyergesné Illés, Erzsébet and László, Zsuzsanna and Veréb, Gábor}, doi = {10.3390/membranes13100812}, journal-iso = {MEMBRANES-BASEL}, journal = {MEMBRANES (BASEL)}, volume = {13}, unique-id = {34166716}, abstract = {Six different TiO2/CNT nanocomposite-coated polyvinylidene-fluoride (PVDF) microfilter membranes (including –OH or/and –COOH functionalized CNTs) were evaluated in terms of their performance in filtering oil-in-water emulsions. In the early stages of filtration, until reaching a volume reduction ratio (VRR) of ~1.5, the membranes coated with functionalized CNT-containing composites provided significantly higher fluxes than the non-functionalized ones, proving the beneficial effect of the surface modifications of the CNTs. Additionally, until the end of the filtration experiments (VRR = 5), notable flux enhancements were achieved with both TiO2 (~50%) and TiO2/CNT-coated membranes (up to ~300%), compared to the uncoated membrane. The irreversible filtration resistances of the membranes indicated that both the hydrophilicity and surface charge (zeta potential) played a crucial role in membrane fouling. However, a sharp and significant flux decrease (~90% flux reduction ratio) was observed for all membranes until reaching a VRR of 1.1–1.8, which could be attributed to the chemical composition of the oil. Gas chromatography measurements revealed a lack of hydrocarbon derivatives with polar molecular fractions (which can act as natural emulsifiers), resulting in significant coalescent ability (and less stable emulsion). Therefore, this led to a more compact cake layer formation on the surface of the membranes (compared to a previous study). It was also demonstrated that all membranes had excellent purification efficiency (97–99.8%) regarding the turbidity, but the effectiveness of the chemical oxygen demand reduction was slightly lower, ranging from 93.7% to 98%.}, year = {2023}, eissn = {2077-0375}, orcid-numbers = {Gyulavári, Tamás/0000-0001-6103-6689; Pap, Zsolt/0000-0002-8049-0809; Laczi, Krisztián/0000-0002-9399-7406; Perei, Katalin/0000-0001-8989-2284; Nyergesné Illés, Erzsébet/0000-0002-2901-9616; Veréb, Gábor/0000-0001-9642-1851} } @article{MTMT:34059475, title = {Investigation of Photocatalytic PVDF Membranes Containing Inorganic Nanoparticles for Model Dairy Wastewater Treatment}, url = {https://m2.mtmt.hu/api/publication/34059475}, author = {Sisay, Elias Jigar and Fazekas, Ákos Ferenc and Gyulavári, Tamás and Heszlerné Kopniczky, Judit and Hopp, Béla and Veréb, Gábor and László, Zsuzsanna}, doi = {10.3390/membranes13070656}, journal-iso = {MEMBRANES-BASEL}, journal = {MEMBRANES (BASEL)}, volume = {13}, unique-id = {34059475}, abstract = {Membrane separation processes are promising methods for wastewater treatment. Membrane fouling limits their wider use; however, this may be mitigated using photocatalytic composite materials for membrane preparation. This study aimed to investigate photocatalytic polyvinylidene fluoride (PVDF)-based nanocomposite membranes for treating model dairy wastewater containing bovine serum albumin (BSA). Membranes were fabricated via physical coating (with TiO2, and/or carbon nanotubes, and/or BiVO4) and blending (with TiO2). Another objective of this study was to compare membranes of identical compositions fabricated using different techniques, and to examine how various TiO2 concentrations affect the antifouling and cleaning performances of the blended membranes. Filtration experiments were performed using a dead-end cell. Filtration resistances, BSA rejection, and photocatalytic cleanability (characterized by flux recovery ratio (FRR)) were measured. The surface characteristics (SEM, EDX), roughness (measured by atomic force microscopy, AFM), wettability (contact angle measurements), and zeta potential of the membranes were also examined. Coated PVDF membranes showed higher hydrophilicity than the pristine PVDF membrane, as evidenced by a decreased contact angle, but the higher hydrophilicity did not result in higher fluxes, unlike the case of blended membranes. The increased surface roughness resulted in increased reversible fouling, but decreased BSA retention. Furthermore, the TiO2-coated membranes had a better flux recovery ratio (FRR, 97%) than the TiO2-blended membranes (35%). However, the TiO2-coated membrane had larger total filtration resistances and a lower water flux than the commercial pristine PVDF membrane and TiO2-blended membrane, which may be due to pore blockage or an additional coating layer formed by the nanoparticles. The BSA rejection of the TiO2-coated membrane was lower than that of the commercial pristine PVDF membrane. In contrast, the TiO2-blended membranes showed lower resistance than the pristine PVDF membrane, and exhibited better antifouling performance, superior flux, and comparable BSA rejection. Increasing the TiO2 content of the TiO2-blended membranes (from 1 to 2.5%) resulted in increased antifouling and comparable BSA rejection (more than 95%). However, the effect of TiO2 concentration on flux recovery was negligible.}, year = {2023}, eissn = {2077-0375}, orcid-numbers = {Gyulavári, Tamás/0000-0001-6103-6689; Hopp, Béla/0000-0002-4272-7721; Veréb, Gábor/0000-0001-9642-1851} }