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The most common reactive material used for the construction of a permeable reactive barrier (PRB) is zero valent iron (ZVI), however, its processing can generate corrosive effects that reduce the efficiency of the barrier. The present study makes a major contribution to understanding new reactive materials as natural and synthetic, easy to obtain, economical and environmentally friendly as possible substitutes for the traditional ZHV to be used as filters in the removal of three transition metals (Zn, Cu, Cd). To assess the ability to remove these pollutants, a series of batch and column tests were carried out at laboratory scale with these materials. Through BACH tests, four of seven substances with a removal percentage higher than 99% were prioritized (cabuya, natural clinoptilolite zeolites, sodium mordenite and mordenite). From this group of substances, column tests were performed where it is evidenced that cabuya fiber presents the lowest absorption time (≈189 h) while natural zeolite mordenite shows the highest time (≈833 h). The latter being the best option for the PRB design. The experimental values were also reproduced by the RETRASO code; through this program, the trend between the observed and simulated values with respect to the best reactive substance was corroborated.
Celia Mayacela-Rojas; Antonio Molinari; José Cortina; Oriol Gibert; Carlos Ayora; Adalgisa Tavolaro; María Rivera-Velásquez; Carmine Fallico. Removal of Transition Metals from Contaminated Aquifers by PRB Technology: Performance Comparison among Reactive Materials. International Journal of Environmental Research and Public Health 2021, 18, 6075 .
AMA StyleCelia Mayacela-Rojas, Antonio Molinari, José Cortina, Oriol Gibert, Carlos Ayora, Adalgisa Tavolaro, María Rivera-Velásquez, Carmine Fallico. Removal of Transition Metals from Contaminated Aquifers by PRB Technology: Performance Comparison among Reactive Materials. International Journal of Environmental Research and Public Health. 2021; 18 (11):6075.
Chicago/Turabian StyleCelia Mayacela-Rojas; Antonio Molinari; José Cortina; Oriol Gibert; Carlos Ayora; Adalgisa Tavolaro; María Rivera-Velásquez; Carmine Fallico. 2021. "Removal of Transition Metals from Contaminated Aquifers by PRB Technology: Performance Comparison among Reactive Materials." International Journal of Environmental Research and Public Health 18, no. 11: 6075.
Porous carbon materials are currently subjected to strong research efforts mainly due to their excellent performances in energy storage devices. A sustainable process to obtain them is hydrothermal carbonization (HTC), in which the decomposition of biomass precursors generates solid products called hydrochars, together with liquid and gaseous products. Hydrochars have a high C content and are rich with oxygen-containing functional groups, which is important for subsequent activation. Orange pomace and orange peels are considered wastes and then have been investigated as possible feedstocks for hydrochars production. On the contrary, orange juice was treated by HTC only to obtain carbon quantum dots. In the present study, pure orange juice was hydrothermally carbonized and the resulting hydrochar was filtered and washed, and graphitized/activated by KOH in nitrogen atmosphere at 800 °C. The resulting material was studied by transmission and scanning electron microscopy, Raman spectroscopy, X-ray photoelectron spectroscopy, X-ray diffraction, and nitrogen sorption isotherms. We found porous microspheres with some degree of graphitization and high nitrogen content, a specific surface of 1725 m2/g, and a pore size distribution that make them good candidates for supercapacitor electrodes.
Francesco Veltri; Francesca Alessandro; Andrea Scarcello; Amerigo Beneduci; Melvin Arias Polanco; Denia Cid Perez; Cristian Vacacela Gomez; Adalgisa Tavolaro; Girolamo Giordano; Lorenzo S. Caputi. Porous Carbon Materials Obtained by the Hydrothermal Carbonization of Orange Juice. Nanomaterials 2020, 10, 655 .
AMA StyleFrancesco Veltri, Francesca Alessandro, Andrea Scarcello, Amerigo Beneduci, Melvin Arias Polanco, Denia Cid Perez, Cristian Vacacela Gomez, Adalgisa Tavolaro, Girolamo Giordano, Lorenzo S. Caputi. Porous Carbon Materials Obtained by the Hydrothermal Carbonization of Orange Juice. Nanomaterials. 2020; 10 (4):655.
Chicago/Turabian StyleFrancesco Veltri; Francesca Alessandro; Andrea Scarcello; Amerigo Beneduci; Melvin Arias Polanco; Denia Cid Perez; Cristian Vacacela Gomez; Adalgisa Tavolaro; Girolamo Giordano; Lorenzo S. Caputi. 2020. "Porous Carbon Materials Obtained by the Hydrothermal Carbonization of Orange Juice." Nanomaterials 10, no. 4: 655.
A novel method is presented to prepare few-layer graphene (FLG) in N-methyl-2-pyrrolidinone (NMP) by using a simple, low-cost and energy-effective shear exfoliation assisted by zeolite and using a cappuccino mixer to produce shear. We propose that the exfoliation of natural graphite flakes can be achieved using inelastic collisions between graphite flakes and zeolite particles in a dynamic colloidal fluid. To confirm the exfoliation of FLG, spectroscopy and morphological studies are carried out using Raman spectroscopy, scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Additionally, the obtained graphene shows a linear flow of current and low resistance. The proposed method shows great promise for the industrial-scale synthesis of high-quality graphene with potential applications in future graphene-based devices, and furthermore, this method can be extended to exfoliate inorganic layered materials such as BN and MoS2.
Gabriela Tubon Usca; Cristian Vacacela Gomez; Marco Guevara; Talia Tene; Jorge Hernandez; Raul Molina; Adalgisa Tavolaro; Domenico Miriello; Lorenzo S. Caputi. Zeolite-Assisted Shear Exfoliation of Graphite into Few-Layer Graphene. Crystals 2019, 9, 377 .
AMA StyleGabriela Tubon Usca, Cristian Vacacela Gomez, Marco Guevara, Talia Tene, Jorge Hernandez, Raul Molina, Adalgisa Tavolaro, Domenico Miriello, Lorenzo S. Caputi. Zeolite-Assisted Shear Exfoliation of Graphite into Few-Layer Graphene. Crystals. 2019; 9 (8):377.
Chicago/Turabian StyleGabriela Tubon Usca; Cristian Vacacela Gomez; Marco Guevara; Talia Tene; Jorge Hernandez; Raul Molina; Adalgisa Tavolaro; Domenico Miriello; Lorenzo S. Caputi. 2019. "Zeolite-Assisted Shear Exfoliation of Graphite into Few-Layer Graphene." Crystals 9, no. 8: 377.
In this study, we propose a novel approach to prepare few-layer graphene (FLG) dispersions, which is realized by exfoliating natural graphite flakes in a surfactant aqueous solution under hydrothermal treatment and liquid-phase exfoliation. In order to obtain stable and well-dispersed FLG dispersions, pristine graphite is hydrothermally expanded in a hexadecyltrimethylammonium bromide (CTAB) aqueous solution at 180 °C for 15 h, followed by sonication up to 3 h. In comparison to long-time sonication methods, the present method is significantly efficient, and most importantly, does not involve the use of an oxidizing agent and hazardous media, which will make it more competent in the scalable production of graphene.
Cristian Vacacela Gomez; Talia Tene; Marco Guevara; Gabriela Tubon Usca; Dennys Colcha; Hannibal Brito; Raul Molina; Stefano Bellucci; Adalgisa Tavolaro. Preparation of Few-Layer Graphene Dispersions from Hydrothermally Expanded Graphite. Applied Sciences 2019, 9, 2539 .
AMA StyleCristian Vacacela Gomez, Talia Tene, Marco Guevara, Gabriela Tubon Usca, Dennys Colcha, Hannibal Brito, Raul Molina, Stefano Bellucci, Adalgisa Tavolaro. Preparation of Few-Layer Graphene Dispersions from Hydrothermally Expanded Graphite. Applied Sciences. 2019; 9 (12):2539.
Chicago/Turabian StyleCristian Vacacela Gomez; Talia Tene; Marco Guevara; Gabriela Tubon Usca; Dennys Colcha; Hannibal Brito; Raul Molina; Stefano Bellucci; Adalgisa Tavolaro. 2019. "Preparation of Few-Layer Graphene Dispersions from Hydrothermally Expanded Graphite." Applied Sciences 9, no. 12: 2539.
This paper deals with the design and manufacture of pure and hybrid synthetic (Mixed Matrix Membranes, MMMs) zeolite scaffolds (containing various amount of zeolite crystals dispersed in a polymeric matrix) to obtain new biomaterials. These scaffolds can potentially be used in the field of translational medicine to obtain innovative results to address tumorigenesis mechanisms with the promotion of an effort to deal with technical methods and information. Since olive oil has beneficial effects in healthy human cells and slows down and/or inhibits cell growth, the aim of this work was to monitor the protective and beneficial antitumor effects of olive oil in a new solid formulation (Spread Bio-Oil) on cancer cell cultured on zeolite scaffolds. In order to investigate the cytotoxicity of the new bio-oil spread and to test antiproliferative activity on the cancer cells we used two phenotypically different human breast cancer cell lines (MCF-7 and MDA-MB-231) seeded on various morphologies of zeolite membranes. We report the fabrication and characterization of pure and hybrid (MMMs) zeolite membranes and evaluated the intensively cell adhesion, spreading and cell growth by adhesion test, MTT, optical microscopy analyses and Scanning Electronic Microscopy (SEM) microphotography analyses. Our results demonstrate that both cell lines adhered and grow on all zeolite surfaces and that both show better viability after Spread Bio-Oil treatments. All cell adhesions are a specific membrane-type and, in particular, MCF-7 cells interact and adhere preferentially on pure zeolite membranes. Cancer cells seem to recognize and prefer the characteristics of the supports according to the following trend: Co-ZSM-5 > Co-S-1 > 13X. Moreover, Co-ZSM-5 zeolite membranes were the best scaffolds and MDA-MB-231 cells after administration of Spread Bio-Oil showed less viability with respect to MCF-7 responding better to all concentrations of the innovative food. Our data indicate that Spread Bio-Oil decreases at very low concentration values (5, 10, 25, 50, 100, 200 and 300 μg/mL) cell proliferation in a dose- and time-dependent manner. The work confirms both the superiority of pure zeolite scaffolds for cultures of human normal and cancer cells and Spread Bio-Oil as an innovative food preserving all the beneficial and healthy properties of the extra virgin olive oil from which it derives.
Palmira Tavolaro; Silvia Catalano; Adalgisa Tavolaro. Anticancer activity modulation of an innovative solid formulation of extra virgin olive oil by cultured zeolite scaffolds. Food and Chemical Toxicology 2018, 124, 139 -150.
AMA StylePalmira Tavolaro, Silvia Catalano, Adalgisa Tavolaro. Anticancer activity modulation of an innovative solid formulation of extra virgin olive oil by cultured zeolite scaffolds. Food and Chemical Toxicology. 2018; 124 ():139-150.
Chicago/Turabian StylePalmira Tavolaro; Silvia Catalano; Adalgisa Tavolaro. 2018. "Anticancer activity modulation of an innovative solid formulation of extra virgin olive oil by cultured zeolite scaffolds." Food and Chemical Toxicology 124, no. : 139-150.
A series of experimental batch tests has been carried out with the aim of improving the knowledge of fundamental processes related to the fate and behavior of heavy metals that can be of environmental concern in groundwater. The analysis of contaminants (i.e., Cu, Zn, Cd and Pb) dynamics in different environmental compartments is specifically addressed by comparing the removal efficiencies of different types of reactive materials, three natural (i.e., vegetal fibers, natural limestone and natural zeolite) and one synthetic (i.e., synthetic zeolite). Results stemming from these reactive media has been compared with the outcomes related to the same test performed using zero valent iron which is the reactant usually employed for heavy metals remediation. All tested reactants exhibited important removal percentages, even larger than 90% in most cases, achieved in a contact time ranging between about 12 h and slightly longer than a day (i.e., 30 h). Maximum adsorption percentages are observed for pH ranging between 4 and 8 for all tested materials and contaminants. Our findings provided relevant evidence, to both researchers and technicians, on the competitiveness of the explored alternative mediums with respect to the classical reactants usually employed for heavy metals remediation.
Antonio Molinari; Celia Margarita Mayacela Rojas; Amerigo Beneduci; Adalgisa Tavolaro; Maria Fernanda Rivera Velasquez; Carmine Fallico. Adsorption Performance Analysis of Alternative Reactive Media for Remediation of Aquifers Affected by Heavy Metal Contamination. International Journal of Environmental Research and Public Health 2018, 15, 980 .
AMA StyleAntonio Molinari, Celia Margarita Mayacela Rojas, Amerigo Beneduci, Adalgisa Tavolaro, Maria Fernanda Rivera Velasquez, Carmine Fallico. Adsorption Performance Analysis of Alternative Reactive Media for Remediation of Aquifers Affected by Heavy Metal Contamination. International Journal of Environmental Research and Public Health. 2018; 15 (5):980.
Chicago/Turabian StyleAntonio Molinari; Celia Margarita Mayacela Rojas; Amerigo Beneduci; Adalgisa Tavolaro; Maria Fernanda Rivera Velasquez; Carmine Fallico. 2018. "Adsorption Performance Analysis of Alternative Reactive Media for Remediation of Aquifers Affected by Heavy Metal Contamination." International Journal of Environmental Research and Public Health 15, no. 5: 980.
The Zero Valent Iron (ZVI) is the material most commonly used for permeable reactive barriers (PRB). For technical and economic reasons, hoter reactive substances usable in alternative to ZVI are investigated. The present study takes into account a vegetable fibers, the cabuya, investigating its capacity to retain heavy metals. The capacity of the cabuya fibers to adsorb heavy metals was verified in laboratory, by batch and column tests. The batch tests were carried out with cabuya and ZVI, using copper (Cu), zinc (Zn), cadmium (Cd) and lead (Pb). The results obtained by the cabuya fibers showed a very high adsorption capacity of heavy metals and resulted very similar to those obtained for the broom fibers in a previous study. The high value of the absorption capacity of the cabuya fibers was also confirmed by the analogous comparison made with the results of the batch tests carried out with ZVI. Column tests, using copper, zinc and cadmium, allowed to determine for the cabuya fibers the maximum removal percentage of the heavy metals considered, the corresponding times and the time ranges of the release phase. For each metal considered, for a given length and three different times, the constant of degradation of cabuya fibers was determined, obtaining values very close to those reported for broom fibers. The scalar behavior of heavy metal removal percentage was verified. An electron microscope analysis allowed to compare, by SEM images, the characteristics of the cabuya and broom fibers. Finally, to investigate the chemical structure of cabuya and broom fibers, the FTIR technique was used, obtaining their respective infrared spectra.
Celia Margarita Mayacela Rojas; María Fernanda Rivera Velásquez; Adalgisa Tavolaro; Antonio Molinari; Carmine Fallico. Use of Vegetable Fibers for PRB to Remove Heavy Metals from Contaminated Aquifers—Comparisons among Cabuya Fibers, Broom Fibers and ZVI. International Journal of Environmental Research and Public Health 2017, 14, 684 .
AMA StyleCelia Margarita Mayacela Rojas, María Fernanda Rivera Velásquez, Adalgisa Tavolaro, Antonio Molinari, Carmine Fallico. Use of Vegetable Fibers for PRB to Remove Heavy Metals from Contaminated Aquifers—Comparisons among Cabuya Fibers, Broom Fibers and ZVI. International Journal of Environmental Research and Public Health. 2017; 14 (7):684.
Chicago/Turabian StyleCelia Margarita Mayacela Rojas; María Fernanda Rivera Velásquez; Adalgisa Tavolaro; Antonio Molinari; Carmine Fallico. 2017. "Use of Vegetable Fibers for PRB to Remove Heavy Metals from Contaminated Aquifers—Comparisons among Cabuya Fibers, Broom Fibers and ZVI." International Journal of Environmental Research and Public Health 14, no. 7: 684.
LTL, MEL, MFI, LTA, FAU pure and hybrid zeolite membranes were synthesized and applied to in vitro cell cultures. These membranes have been used in inorganic cell/scaffold constructs having different physicochemical characteristics such as frameworks, hydrophilicity, crystal size, chemical composition, acid-base properties (Point of Zero Charge, PZC) and surface morphology. We have selected the MCF-7 human breast cancer cell line as model tumor cell line. Because the control of cell interactions, as the adhesion, proliferation, remodelling and mobility, is important for differentiation and progression of tumors, this work focused on response of cancer cells adhered and grown on synthesized zeolite surfaces in order to study the influence of these scaffolds in controlled conditions. This study showed that all the synthesized zeolite membranes are excellent scaffolds because they are very selective materials to support the adhesion and growth of neoplastic cells. In addition, we evaluated the applicability of zeolite pure and hybrid membranes as carrier for selective adsorption and the delivery of two antineoplastic drugs: doxorubicin (DOX) and bergapten (5-MOP). FESEM, FTIR-ATR, XRD, AFM, Point of Zero Charge (PZC) and contact angle analyses have characterized all scaffolds. Cell adhesion, viability and morphology were measured by count, MTT assay and FESEM microphotography analysis, at various incubation times from seeding and drug treatments.
P Tavolaro; S Catalano; A Tavolaro. Effect of Physicochemical Characteristics of Pure and Hybrid Zeolite Scaffolds on Neoplastic Cell Activities. Advanced Science Letters 2017, 23, 5844 -5846.
AMA StyleP Tavolaro, S Catalano, A Tavolaro. Effect of Physicochemical Characteristics of Pure and Hybrid Zeolite Scaffolds on Neoplastic Cell Activities. Advanced Science Letters. 2017; 23 (6):5844-5846.
Chicago/Turabian StyleP Tavolaro; S Catalano; A Tavolaro. 2017. "Effect of Physicochemical Characteristics of Pure and Hybrid Zeolite Scaffolds on Neoplastic Cell Activities." Advanced Science Letters 23, no. 6: 5844-5846.
Novel pure and hybrid zeolite membranes were prepared with appropriate different physicochemical characteristics such as frameworks, hydrophilicity, crystal size, chemical composition, acid-base properties (Point of Zero Charge, PZC) and surface morphology and used in inorganic cell/scaffold constructs. Because the control of cell interactions, as the adhesion, proliferation, remodelling and mobility, is important for differentiation and progression of tumors, this work focused on response of cancer cells adhered and grown on synthesized zeolite surfaces in order to study the influence of these scaffolds in controlled conditions. We have selected the MCF-7 and MDA-MB-231 human breast cancer cell line as model tumor cell lines. This study showed that all the zeolite membranes synthesized are excellent scaffolds because they are very selective materials to support the adhesion and growth of neoplastic cells. All zeolite scaffolds were characterized by FESEM, FTIR ATR, XRD, AFM, PZC and contact angle analyses. Cell adhesion, viability and morphology were measured by count, MTT assay and FESEM microphotography analysis, at various incubation times.
Palmira Tavolaro; Guglielmo Martino; Sebastiano Andò; Adalgisa Tavolaro. Fabrication and evaluation of novel zeolite membranes to control the neoplastic activity and anti-tumoral drug treatments in human breast cancer cells. Part 1: Synthesis and characterization of Pure Zeolite Membranes and Mixed Matrix Membranes for adhesion and growth of cancer cells. Materials Science and Engineering: C 2016, 69, 894 -904.
AMA StylePalmira Tavolaro, Guglielmo Martino, Sebastiano Andò, Adalgisa Tavolaro. Fabrication and evaluation of novel zeolite membranes to control the neoplastic activity and anti-tumoral drug treatments in human breast cancer cells. Part 1: Synthesis and characterization of Pure Zeolite Membranes and Mixed Matrix Membranes for adhesion and growth of cancer cells. Materials Science and Engineering: C. 2016; 69 ():894-904.
Chicago/Turabian StylePalmira Tavolaro; Guglielmo Martino; Sebastiano Andò; Adalgisa Tavolaro. 2016. "Fabrication and evaluation of novel zeolite membranes to control the neoplastic activity and anti-tumoral drug treatments in human breast cancer cells. Part 1: Synthesis and characterization of Pure Zeolite Membranes and Mixed Matrix Membranes for adhesion and growth of cancer cells." Materials Science and Engineering: C 69, no. : 894-904.
Highlights•Different zeolite scaffolds, pure (PZM) and hybrid (MMM), can modify the cell physiology of MCF-7 and MDA-MB-231 breast cancer cell lines (having different speed of growth, response to hormones, invasiveness and metastatic activity) through the expression of specific behaviors.•The physicochemical characteristics of zeolite membranes that we prepared and used as supports for human cancer breast cell cultures, are of the utmost importance, because they directly effect the interaction between the solid phase and cells and modulate antineoplastic drug adsorption.•Pure Zeolite Membranes and matrix Mixed Membranes can modular the quantity and quality of expression of MMP2 and MMP9, before and after the pharmacological treatment, and control both the proteolytic and invasive activity and the carcinogenicity of breast cancer cells. AbstractThis work is focused on the response of two invasive phenotypes of human breast cancer cells, MCF-7 and MDA-MB-231, grown on synthesized zeolite scaffolds in order to study the influence of those biomaterials in controlled conditions with and without anti-tumoral drug treatments.Our research was directed to the use of doxorubicin (DOX) and bergapten (5-MOP). The former is broadly considered the most active single agent available for the treatment of breast cancer, the second is a natural psoralen with an apoptotic effect.The results indicate that both drugs inhibit the cell viability of all cell lines grown on all zeolite scaffolds and that all Pure Zeolite Membranes are more responsive with respect to all Mixed Matrix Membranes. Moreover, the results after treatment with DOX at a concentration of 7.4 μM for 24 h, show that the expression of the matrix metalloproteinases (MMP-2 and MMP-9) is greatly reduced in both cell lines, especially in those adherent on Pure Zeolite Scaffolds. Graphical abstract
Palmira Tavolaro; Guglielmo Martino; Sebastiano Andò; Adalgisa Tavolaro. Zeolite scaffolds for cultures of human breast cancer cells. Part II: Effect of pure and hybrid zeolite membranes on neoplastic and metastatic activity control. Materials Science and Engineering: C 2016, 68, 474 -481.
AMA StylePalmira Tavolaro, Guglielmo Martino, Sebastiano Andò, Adalgisa Tavolaro. Zeolite scaffolds for cultures of human breast cancer cells. Part II: Effect of pure and hybrid zeolite membranes on neoplastic and metastatic activity control. Materials Science and Engineering: C. 2016; 68 ():474-481.
Chicago/Turabian StylePalmira Tavolaro; Guglielmo Martino; Sebastiano Andò; Adalgisa Tavolaro. 2016. "Zeolite scaffolds for cultures of human breast cancer cells. Part II: Effect of pure and hybrid zeolite membranes on neoplastic and metastatic activity control." Materials Science and Engineering: C 68, no. : 474-481.
G. Tubon Usca; J. Hernandez-Ambato; C. Pace; L.S. Caputi; A. Tavolaro. Liquid-phase exfoliated graphene self-assembled films: Low-frequency noise and thermal-electric characterization. Applied Surface Science 2016, 380, 268 -273.
AMA StyleG. Tubon Usca, J. Hernandez-Ambato, C. Pace, L.S. Caputi, A. Tavolaro. Liquid-phase exfoliated graphene self-assembled films: Low-frequency noise and thermal-electric characterization. Applied Surface Science. 2016; 380 ():268-273.
Chicago/Turabian StyleG. Tubon Usca; J. Hernandez-Ambato; C. Pace; L.S. Caputi; A. Tavolaro. 2016. "Liquid-phase exfoliated graphene self-assembled films: Low-frequency noise and thermal-electric characterization." Applied Surface Science 380, no. : 268-273.
The design, preparation and selection of inorganic materials useful as functional scaffolds for cell adhesion is a complex question based both on the understanding of the chemical behavior of the materials and individual cells, and on their interactions. Pure zeolite membranes formed from synthetic crystals offer chemically-capable being modulated silanolic surfaces that are amenable to adhesion and growth of fibroblasts. We report the facile preparation of reusable, very longlasting, biocompatible, easily sterilized synthetic scaffolds in a zeolite membrane configuration, which are very stable in aqueous media (apart from ionic strength and pH values), able to adsorb pollutant species and to confine undesired toxic ions (present in culture media). This may ultimately lead to the development of cell supports for economic antibiotic-free culture media.
Palmira Tavolaro; Silvia Catalano; Guglielmo Martino; Adalgisa Tavolaro. Zeolite inorganic scaffolds for novel biomedical application: Effect of physicochemical characteristic of zeolite membranes on cell adhesion and viability. Applied Surface Science 2016, 380, 135 -140.
AMA StylePalmira Tavolaro, Silvia Catalano, Guglielmo Martino, Adalgisa Tavolaro. Zeolite inorganic scaffolds for novel biomedical application: Effect of physicochemical characteristic of zeolite membranes on cell adhesion and viability. Applied Surface Science. 2016; 380 ():135-140.
Chicago/Turabian StylePalmira Tavolaro; Silvia Catalano; Guglielmo Martino; Adalgisa Tavolaro. 2016. "Zeolite inorganic scaffolds for novel biomedical application: Effect of physicochemical characteristic of zeolite membranes on cell adhesion and viability." Applied Surface Science 380, no. : 135-140.
Dyes are usually used in textile manufacturing and are one of the major contaminations in water. Thus, from an environmental point of view, the removal of dyes is of great concern, and recent applications using carbon-based materials showed high adsorption ability. In this work we use graphene oxide (GO) produced by improved Hummer’s method, for adsorption of acridine orange dye (AO) in water. GO is a material containing functional groups such as carboxyl, epoxy, ketone, and hydroxyl, that can adsorb cationic dyes. Factors such as initial concentration of dye, the amount of GO, temperature and contact time were evaluated. Results show that the adsorption equilibrium, with the removal of 40% of the dye, is reached in approximately 1 hour, and that the adsorption capacity increases at higher initial concentrations. The highest value of AO adsorbed was 229.8 mg/g equivalent to 92% removal percentage by using AO initial concentration 0.10 mg/mL. FT-IR analysis of GO with adsorbed AO shows changes in the stretching vibrational bands, which corroborate the AO/GO interaction due to the functional groups present in GO. Furthermore, AO adsorbed on GO does not desorb back into water. Our results show that GO is an effective adsorbent and could be used to treat effluents contaminated with dyes.
D. Coello Fiallos; Cristian Vacacela Gomez; G. Tubón Usca; D. Cid Pérez; Adalgisa Tavolaro; G. Martino; L. S. Caputi. Removal of acridine orange from water by graphene oxide. INTERNATIONAL CONFERENCES AND EXHIBITION ON NANOTECHNOLOGIES AND ORGANIC ELECTRONICS (NANOTEXNOLOGY 2014): Proceedings of NN14 and ISFOE14 2015, 1 .
AMA StyleD. Coello Fiallos, Cristian Vacacela Gomez, G. Tubón Usca, D. Cid Pérez, Adalgisa Tavolaro, G. Martino, L. S. Caputi. Removal of acridine orange from water by graphene oxide. INTERNATIONAL CONFERENCES AND EXHIBITION ON NANOTECHNOLOGIES AND ORGANIC ELECTRONICS (NANOTEXNOLOGY 2014): Proceedings of NN14 and ISFOE14. 2015; ():1.
Chicago/Turabian StyleD. Coello Fiallos; Cristian Vacacela Gomez; G. Tubón Usca; D. Cid Pérez; Adalgisa Tavolaro; G. Martino; L. S. Caputi. 2015. "Removal of acridine orange from water by graphene oxide." INTERNATIONAL CONFERENCES AND EXHIBITION ON NANOTECHNOLOGIES AND ORGANIC ELECTRONICS (NANOTEXNOLOGY 2014): Proceedings of NN14 and ISFOE14 , no. : 1.
Doxorubicin hydrochloride (DOX), is a class I anthracycline antibiotic (FDA approved in the 1970s) widely used as an effective chemotherapeutic drug for the treatment of many human neoplasms. Like most anticancer drugs, DOX can provoke severe toxicity to the body when it is administered at high doses systemically. Here we report the results of an investigation of drug adsorption on graphene oxide (GO) materials prepared by the Improved Hummer's method. High-purity GO has been prepared, characterized by XPS, UV-vis, FTIR-ATR, FESEM, UV- vis analyses, Zero Point Charge determinations and applied in the immobilization of doxorubicin, via simple noncovalent method. The adsorption percentage of the drug at pH 7 on GO was observed to be higher (equal to 90 %) than that obtained at acidic pH 3 (equal to 85%). Experimental result of adsorption of DOX on GO, obtained by FTIR-ATR spectroscopy analysis indicate that the inorganic material and the drug form and adduct by π-π stacking interactions.
G. Tubón Usca; Cristian Vacacela Gomez; D. Coello Fiallos; Adalgisa Tavolaro; G. Martino; L. S. Caputi. Preparation of graphene oxide as biomaterials for drug adsorption. INTERNATIONAL CONFERENCES AND EXHIBITION ON NANOTECHNOLOGIES AND ORGANIC ELECTRONICS (NANOTEXNOLOGY 2014): Proceedings of NN14 and ISFOE14 2015, 1646, 79 -86.
AMA StyleG. Tubón Usca, Cristian Vacacela Gomez, D. Coello Fiallos, Adalgisa Tavolaro, G. Martino, L. S. Caputi. Preparation of graphene oxide as biomaterials for drug adsorption. INTERNATIONAL CONFERENCES AND EXHIBITION ON NANOTECHNOLOGIES AND ORGANIC ELECTRONICS (NANOTEXNOLOGY 2014): Proceedings of NN14 and ISFOE14. 2015; 1646 (1):79-86.
Chicago/Turabian StyleG. Tubón Usca; Cristian Vacacela Gomez; D. Coello Fiallos; Adalgisa Tavolaro; G. Martino; L. S. Caputi. 2015. "Preparation of graphene oxide as biomaterials for drug adsorption." INTERNATIONAL CONFERENCES AND EXHIBITION ON NANOTECHNOLOGIES AND ORGANIC ELECTRONICS (NANOTEXNOLOGY 2014): Proceedings of NN14 and ISFOE14 1646, no. 1: 79-86.
We synthesized various zeolite nanocrystals and composite membranes with mordenite (MOR), ZSM-5, and B-silicalite (MFI) structures under hydrothermal conditions and we demonstrated their ability to immobilize famotidine. Ion-exchange experiments using metal salt solutions were carried out to obtain Cu(II)- and Zn(II)-containing nanosized crystals. All zeolite particles were synthesized obtaining high purity, as evidenced by powder X-ray diffraction (XRD) analysis performed on the zeolite crystals and scraped films. The crystal and membrane morphologies and sizes were determined by scanning electron microscopy (FESEM). The equilibrium and kinetic characteristics of the drug on these materials were studied by varying the incubation time, the famotidine concentration and the pH values. The adsorption percentage of the drug at pH 7.4 in both Cu-MOR and B-MFI crystals was observed to be higher than that obtained with Cu-ZSM-5, Zn-ZSM-5, and Zn-MOR. The desorption behavior of B-silicalite after 1 h is remarkable and has important implications for biomedical applications.
Adalgisa Tavolaro; Ilaria Iolanda Riccio; Palmira Tavolaro. Hydrothermal synthesis of zeolite composite membranes and crystals as potential vectors for drug-delivering biomaterials. Microporous and Mesoporous Materials 2013, 167, 62 -70.
AMA StyleAdalgisa Tavolaro, Ilaria Iolanda Riccio, Palmira Tavolaro. Hydrothermal synthesis of zeolite composite membranes and crystals as potential vectors for drug-delivering biomaterials. Microporous and Mesoporous Materials. 2013; 167 ():62-70.
Chicago/Turabian StyleAdalgisa Tavolaro; Ilaria Iolanda Riccio; Palmira Tavolaro. 2013. "Hydrothermal synthesis of zeolite composite membranes and crystals as potential vectors for drug-delivering biomaterials." Microporous and Mesoporous Materials 167, no. : 62-70.
The adsorption of cytochrome c on to zeolite crystals and membranes with different chemical composition and structure was studied. The structure and texture of zeolite materials were identified by X-ray diffraction (XRD) and scanning electron microscopy (FESEM), while the variation of protein conformation was studied by Fourier transform infrared attenuated total reflectance (FTIR-ATR) analysis. In order to separate the influence of zeolite structures from the effect of composite membranes, a through analysis of the cytochrome c adsorption was performed on different crystals by varying several experimental parameters such as: pH value, protein amount, zeolite structures and chemical compositions. It is shown that the electrostatic type of interaction seems to be of the utmost importance to govern the immobilization, while the zeolite Brönsted acidity of the support is the subordinate parameter which differentiates the adsorption performances of different zeolite structures (that distinct for chemical composition of the framework).
Palmira Tavolaro; Adalgisa Tavolaro; Guglielmo Martino. Influence of zeolite PZC and pH on the immobilization of cytochrome c: A preliminary study regarding the preparation of new biomaterials. Colloids and Surfaces B: Biointerfaces 2009, 70, 98 -107.
AMA StylePalmira Tavolaro, Adalgisa Tavolaro, Guglielmo Martino. Influence of zeolite PZC and pH on the immobilization of cytochrome c: A preliminary study regarding the preparation of new biomaterials. Colloids and Surfaces B: Biointerfaces. 2009; 70 (1):98-107.
Chicago/Turabian StylePalmira Tavolaro; Adalgisa Tavolaro; Guglielmo Martino. 2009. "Influence of zeolite PZC and pH on the immobilization of cytochrome c: A preliminary study regarding the preparation of new biomaterials." Colloids and Surfaces B: Biointerfaces 70, no. 1: 98-107.
Composite zeolite catalytic tubular membranes containing rhodium(0) and ruthenium(0) in and on alumina tubes were prepared using the hydrothermal synthesis method termed “multi in situ crystallization” (MISC). The membranes were tested in the partial oxidation of methane to investigate membrane activities. Transition metal-dispersed zeolitic catalytic tubular membranes exhibit a high catalytic surface area, large membrane surface area and high chemical and thermal stabilities. The applicability of these membranes to the partial oxidation reaction is demonstrated.
Adalgisa Tavolaro; Palmira Tavolaro. The preparation of transition metal-containing mordenite catalytic tubular composite membranes. Catalysis Communications 2009, 10, 586 -591.
AMA StyleAdalgisa Tavolaro, Palmira Tavolaro. The preparation of transition metal-containing mordenite catalytic tubular composite membranes. Catalysis Communications. 2009; 10 (5):586-591.
Chicago/Turabian StyleAdalgisa Tavolaro; Palmira Tavolaro. 2009. "The preparation of transition metal-containing mordenite catalytic tubular composite membranes." Catalysis Communications 10, no. 5: 586-591.
An LTA membrane has been crystallized inside a porous ceramic tube and applied to synthesis of methanol from carbon dioxide and hydrogen in a zeolite membrane reactor (ZMR). The results obtained with the ZMR were compared with those gained from one traditional reactor (TR) used under the same operating conditions. CO2 conversion obtained with the ZMR at 210 °C reached 17% under conditions where the equilibrium value without zeolite membrane (TR) is equal to about 6%.
A. Tavolaro. LTA zeolite composite membrane preparation, characterization and application in a zeolitic membrane reactor. Catalysis Communications 2007, 8, 789 -794.
AMA StyleA. Tavolaro. LTA zeolite composite membrane preparation, characterization and application in a zeolitic membrane reactor. Catalysis Communications. 2007; 8 (5):789-794.
Chicago/Turabian StyleA. Tavolaro. 2007. "LTA zeolite composite membrane preparation, characterization and application in a zeolitic membrane reactor." Catalysis Communications 8, no. 5: 789-794.
Zeolites due to their low toxicity and high compatibility are considered new biomaterials for medical applications. The surface adsorption behaviour of zeolite crystals and composite membranes was discussed in this research. The zeolite materials were synthesized by hydrothermal syntheses using different reaction gels to modulate the Brönsted acidity of the microporous structures. Spectrophotometric analyses were used to evaluate protein adsorption on these surfaces. This study revealed that zeolite chemical composition and structure influenced the kinetics of protein adsorption. Zeolite Y surface adsorbed greater amount of BSA than the other structures. The percentage of adsorption increases with temperature and depends on the pH of the solution, being highest at the pI of the protein. The influence of the membrane configuration on the protein adsorption was studied using different zeolite structures and crystallization types. It seems that the observed differences could depend on the type of hydrothermal crystallization inside the inorganic support.
Adalgisa Tavolaro; Palmira Tavolaro; Enrico Drioli. Zeolite inorganic supports for BSA immobilization: Comparative study of several zeolite crystals and composite membranes. Colloids and Surfaces B: Biointerfaces 2007, 55, 67 -76.
AMA StyleAdalgisa Tavolaro, Palmira Tavolaro, Enrico Drioli. Zeolite inorganic supports for BSA immobilization: Comparative study of several zeolite crystals and composite membranes. Colloids and Surfaces B: Biointerfaces. 2007; 55 (1):67-76.
Chicago/Turabian StyleAdalgisa Tavolaro; Palmira Tavolaro; Enrico Drioli. 2007. "Zeolite inorganic supports for BSA immobilization: Comparative study of several zeolite crystals and composite membranes." Colloids and Surfaces B: Biointerfaces 55, no. 1: 67-76.
Palmira Tavolaro; Adalgisa Tavolaro. Zeolitic inorganic supports for the cytochrome c immobilization: comparative study of several zeolite membranes. Desalination 2006, 200, 516 -517.
AMA StylePalmira Tavolaro, Adalgisa Tavolaro. Zeolitic inorganic supports for the cytochrome c immobilization: comparative study of several zeolite membranes. Desalination. 2006; 200 (1-3):516-517.
Chicago/Turabian StylePalmira Tavolaro; Adalgisa Tavolaro. 2006. "Zeolitic inorganic supports for the cytochrome c immobilization: comparative study of several zeolite membranes." Desalination 200, no. 1-3: 516-517.