TY - JOUR AU - Ádám, Anna Adél AU - Ziegenheim, Szilveszter AU - Janovák, László AU - Szabados, Márton AU - Bús, Csaba AU - Kukovecz, Ákos AU - Kónya, Zoltán AU - Dékány, Imre AU - Sipos, Pál Miklós AU - Kutus, Bence TI - Binding of Ca2+ Ions to Alkylbenzene Sulfonates: Micelle Formation, Second Critical Concentration and Precipitation JF - MATERIALS J2 - MATERIALS VL - 16 PY - 2023 IS - 2 PG - 12 SN - 1996-1944 DO - 10.3390/ma16020494 UR - https://m2.mtmt.hu/api/publication/33543168 ID - 33543168 AB - Anionic surfactants, such as sodium linear alkylbenzene sulfonates (NaLAS), are utilized in various fields, including industry, household, and agriculture. The efficiency of their use in aqueous environments is significantly affected by the presence of cations, Ca2+ and Mg2+ in particular, as they can decrease the concentration of the surfactant due to precipitation. To understand cation–sulfonate interactions better, we study both NaLAS colloidal solutions in the presence of CaCl2 and precipitates forming at higher salt concentrations. Upon addition of CaCl2, we find the surface tension and critical micelle concentration of NaLAS to decrease significantly, in line with earlier findings for alkylbenzylsulfonates in the presence of divalent cations. Strikingly, an increase in the surface tension is discernible above 0.6 g L–1 NaLAS, accompanied by the decrease of apparent micelle sizes, which in turn gives rise to transparent systems. Thus, there appears to be a second critical concentration indicating another micellar equilibrium. Furthermore, the maximum salt tolerance of the surfactant is 0.1 g L–1 Ca2+, above which rapid precipitation occurs yielding sparingly soluble CaLAS2∙2H2O. LA - English DB - MTMT ER - TY - JOUR AU - Ádám, Anna Adél AU - Ziegenheim, Szilveszter AU - Papp, Ádám AU - Szabados, Márton AU - Kónya, Zoltán AU - Kukovecz, Ákos AU - Varga, Gábor TI - Nickel Nanoparticles for Liquid Phase Toluene Oxidation – Phenomenon, Opportunities and Challenges JF - CHEMCATCHEM J2 - CHEMCATCHEM VL - 14 PY - 2022 IS - 21 PG - 8 SN - 1867-3880 DO - 10.1002/cctc.202200700 UR - https://m2.mtmt.hu/api/publication/33206602 ID - 33206602 LA - English DB - MTMT ER - TY - JOUR AU - Abdelghafour, Mohamed M. AU - Orbán, Ágoston AU - Imre-Deák, Ágota AU - Lamch, Łukasz AU - Nagyné Frank, Éva AU - Nagy, Roland AU - Ziegenheim, Szilveszter AU - Sipos, Pál Miklós AU - Farkas, Eszter AU - Bari, Ferenc AU - Janovák, László TI - Biocompatible poly(ethylene succinate) polyester with molecular weight dependent drug release properties JF - INTERNATIONAL JOURNAL OF PHARMACEUTICS J2 - INT J PHARM VL - 618 PY - 2022 PG - 11 SN - 0378-5173 DO - 10.1016/j.ijpharm.2022.121653 UR - https://m2.mtmt.hu/api/publication/32741246 ID - 32741246 N1 - Department of Physical Chemistry and Materials Science, University of Szeged, H-6720, Rerrich Béla tér 1, Szeged, Hungary Department of Chemistry, Faculty of Science, Zagazig University, Zagazig, 44519, Egypt Department of Organic and Pharmaceutical Technology, Faculty of Chemistry, Wrocław University of Science and Technology, Wybrzeże Wyspiańskiego 27, Wrocław, 50-370, Poland Department of Organic Chemistry, University of Szeged, Dóm tér 8, Szeged, H-6720, Hungary Department of MOL Department of Hydrocarbon and Coal Processing, Faculty of Engineering, University of Pannonia, Egyetem Str. 10, Veszprém, H-8200, Hungary Department of Inorganic and Analytical Chemistry, University of Szeged, Dóm tér 7, Szeged, H-6720, Hungary Department of Medical Physics and Informatics, Faculty of Medicine & Faculty of Science and Informatics, University of Szeged, Korányi Fasor 9, Szeged, H-6720, Hungary HCEMM-USZ Cerebral Blood Flow and Metabolism Research Group, University of Szeged, Dugonics Square 13, Szeged, H-6720, Hungary Department of Cell Biology and Molecular Medicine, Faculty of Science and Informatics & Faculty of Medicine, University of Szeged, Somogyi Str. 4, Szeged, H-6720, Hungary Export Date: 13 September 2022 CODEN: IJPHD Correspondence Address: Janovák, L.; Department of Physical Chemistry and Materials Science, H-6720, Rerrich Béla tér 1, Hungary; email: janovakl@chem.u-szeged.hu LA - English DB - MTMT ER - TY - JOUR AU - Ziegenheim, Szilveszter AU - Sztegura, Alex AU - Szabados, Márton AU - Kónya, Zoltán AU - Kukovecz, Ákos AU - Pálinkó, István AU - Sipos, Pál Miklós TI - EDTA analogues – unconventional inhibitors of gypsum precipitation JF - JOURNAL OF MOLECULAR STRUCTURE J2 - J MOL STRUCT VL - 1256 PY - 2022 SN - 0022-2860 DO - 10.1016/j.molstruc.2022.132491 UR - https://m2.mtmt.hu/api/publication/32629332 ID - 32629332 N1 - Department of Organic Chemistry, University of Szeged, Dóm tér 8., Szeged, H-6720, Hungary Department of Inorganic and Analytical Chemistry, University of Szeged, Dóm tér 7., Szeged, H-6720, Hungary Department of Applied and Environmental Chemistry, University of Szeged, Rerrich Béla tér 1., Szeged, H-6720, Hungary Material and Solution Structure Research Group, Institute of Chemistry, University of Szeged, Dóm tér 7., Szeged, H-6720, Hungary MTA-SZTE Reaction Kinetics and Surface Chemistry Research Group, Institute of Chemistry, University of Szeged, Rerrich B. tér 1, Szeged, H-6720, Hungary Export Date: 14 March 2022 CODEN: JMOSB Correspondence Address: Sipos, P.; Department of Inorganic and Analytical Chemistry, Dóm tér 7., Hungary; email: sipos@chem.u-szeged.hu LA - English DB - MTMT ER - TY - THES AU - Ziegenheim, Szilveszter TI - The kinetics of gypsum precipitation, the inhibiting effect of citric acid and its use in the differential precipitation of Mg(OH)2 from CaSO4·2H2O [Gipsz kristályosodásának kinetikája, a citromsav inhibíciós hatása és annak felhasználása Mg(OH)2 és CaSO4·2H2O kristályosodásának elválasztásához] PB - Szegedi Tudományegyetem (SZTE) PY - 2021 SP - 81 DO - 10.14232/phd.10961 UR - https://m2.mtmt.hu/api/publication/32866860 ID - 32866860 LA - English DB - MTMT ER - TY - JOUR AU - Tatar, Dalibor AU - Kojčinović, Jelena AU - Marković, Berislav AU - Széchenyi, Aleksandar AU - Miletić, Aleksandar AU - Nagy, Sándor-Balázs AU - Ziegenheim, Szilveszter AU - Szenti, Imre AU - Sápi, András AU - Kukovecz, Ákos AU - Dinjar, Kristijan AU - Tang, Yushu AU - Stenzel, David AU - Varga, Gábor AU - Djerdj, Igor TI - Sol-Gel Synthesis of Ceria-Zirconia-Based High-Entropy Oxides as High-Promotion Catalysts for the Synthesis of 1,2-Diketones from Aldehyde JF - MOLECULES J2 - MOLECULES VL - 26 PY - 2021 IS - 20 PG - 14 SN - 1420-3049 DO - 10.3390/molecules26206115 UR - https://m2.mtmt.hu/api/publication/32336886 ID - 32336886 LA - English DB - MTMT ER - TY - JOUR AU - Ziegenheim, Szilveszter AU - Szabados, Márton AU - Kónya, Zoltán AU - Kukovecz, Ákos AU - Pálinkó, István AU - Sipos, Pál Miklós TI - Manipulating the crystallization kinetics and morphology of gypsum, CaSO4·2H2O via addition of citrate at high levels of supersaturation and the effect of high salinity JF - POLYHEDRON J2 - POLYHEDRON VL - 204 PY - 2021 PG - 10 SN - 0277-5387 DO - 10.1016/j.poly.2021.115253 UR - https://m2.mtmt.hu/api/publication/32023946 ID - 32023946 LA - English DB - MTMT ER - TY - JOUR AU - Ziegenheim, Szilveszter AU - Szabados, Márton AU - Kónya, Zoltán AU - Kukovecz, Ákos AU - Pálinkó, István AU - Sipos, Pál Miklós TI - Differential precipitation of Mg(OH)2 from CaSO4·2H2O using citrate as inhibitor – a promising concept for reagent recovery from MgSO4 waste streams JF - MOLECULES J2 - MOLECULES VL - 25 PY - 2020 IS - 21 PG - 16 SN - 1420-3049 DO - 10.3390/molecules25215012 UR - https://m2.mtmt.hu/api/publication/31640346 ID - 31640346 LA - English DB - MTMT ER - TY - JOUR AU - Ziegenheim, Szilveszter AU - Peintler, Gábor AU - Pálinkó, István AU - Sipos, Pál Miklós TI - The kinetics of the precipitation of gypsum, CaSO4.2H2O, over a wide range of reactant concentrations JF - REACTION KINETICS MECHANISMS AND CATALYSIS J2 - REACT KINET MECH CATAL VL - 131 PY - 2020 IS - 1 SP - 75 EP - 88 PG - 14 SN - 1878-5190 DO - 10.1007/s11144-020-01838-0 UR - https://m2.mtmt.hu/api/publication/31403997 ID - 31403997 LA - English DB - MTMT ER - TY - CHAP AU - Ziegenheim, Szilveszter AU - Sztegura, A AU - Pálinkó, István AU - Sipos, Pál Miklós ED - Ádám, Anna Adél ED - Ziegenheim, Szilveszter TI - Kelátképzők inhibíciós hatása gipsz kristályosodására T2 - XLII. Kémiai Előadói Napok - Előadásösszefoglalók PB - Magyar Kémikusok Egyesülete Csongrád Megyei Csoport CY - Szeged SN - 9786156018014 PY - 2019 SP - 154 EP - 160 PG - 7 UR - https://m2.mtmt.hu/api/publication/30920150 ID - 30920150 LA - Hungarian DB - MTMT ER -