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Silva ACP, Jorgetto AO, Wondracek MHP, Saeki MJ, Pedrosa VA, Colmenares YN, Mastelaro VR, Sutili FK, Martines MAU, Pasta PC, Castro GR. A global pollutant (PVC-polyvinyl chloride) applied as heavy metal binder from aqueous samples: green principles from synthesis to application. Environ Technol 2022; 43:3742-3754. [PMID: 34024261 DOI: 10.1080/09593330.2021.1934560] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2021] [Accepted: 05/12/2021] [Indexed: 06/12/2023]
Abstract
We have developed a clean route for the modification of polyvinylchloride surface (PVC) with 4-amino-5-hydrazino-1,2,4-triazole-3-thiol molecule. The modification reaction was investigated through Fourier Transform Infrared Spectroscopy (FTIR) and X-ray Photoelectron Spectroscopy (XPS) analysis. According to our findings, S-H groups are responsible to the molecule attachment and nitrogen atoms are directly involved in metal ion coordination. These results are in agreement with the pseudo-second-order kinetic model, which infers that chemisorption is the main mechanism for metal removal. Adsorption isotherms of Cd(II), Cu(II) and Pb(II) follow the Langmuir model and the results indicated that Ns values are 0.39, 0.52 and 0.15 mmol g-1, respectively. The calculated Ømax values for Cu(II), Pb(II) and Cd(II) were 3.93, 2.95 and 1.13, respectively, indicating that three types of complex are formed depending on the adsorbed species. Therefore, it can be concluded that PVC use as adsorbent is feasible since it requires a simple modification reaction with nontoxic and low-cost solvents.
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Affiliation(s)
- Adrielli C P Silva
- Institute of Bioscience of Botucatu-UNESP - Chemistry and Biochemistry Department Botucatu, Brazil
| | - Alexandre O Jorgetto
- Institute of Bioscience of Botucatu-UNESP - Chemistry and Biochemistry Department Botucatu, Brazil
| | - Marcos H P Wondracek
- Institute of Bioscience of Botucatu-UNESP - Chemistry and Biochemistry Department Botucatu, Brazil
| | - Margarida J Saeki
- Institute of Bioscience of Botucatu-UNESP - Chemistry and Biochemistry Department Botucatu, Brazil
| | - Valber A Pedrosa
- Institute of Bioscience of Botucatu-UNESP - Chemistry and Biochemistry Department Botucatu, Brazil
| | | | - Valmor R Mastelaro
- São Carlos Institute of Physics, University of São Paulo, São Carlos, Brazil
| | - Felipe K Sutili
- Departamento de Engenharia de Bioprocessos e Biotecnologia, UNESP, Botucatu, Brazil
| | - Marco A U Martines
- Institute of Chemistry, Federal University of Mato Grosso do Sul, Cidade Universitaria, Campo Grande, Brazil
| | - Paula C Pasta
- Institute of Bioscience of Botucatu-UNESP - Chemistry and Biochemistry Department Botucatu, Brazil
| | - Gustavo R Castro
- Institute of Bioscience of Botucatu-UNESP - Chemistry and Biochemistry Department Botucatu, Brazil
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Ichikawa RU, Parra JPRLL, Martins ML, Yoshito WK, Saeki MJ, Turrillas X, Martinez LG. Size-Strain Analysis of Iron-Excess Mn-Zn Ferrite Nanoparticles Using Synchrotron Diffraction and Its Correlation with Magnetic Saturation and Isoelectric pH. J Nanosci Nanotechnol 2018; 18:5697-5703. [PMID: 29458628 DOI: 10.1166/jnn.2018.15446] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Iron-excess Mn-Zn ferrite nanoparticles were prepared by coprecipitation with sodium hydroxide (NaOH) at different concentrations (0.1, 0.2, 0.5 and 1.0 mol/L). The results of X-ray diffraction (XRD) analysis using Whole Powder Pattern Modeling (WPPM) showed that higher concentrations of NaOH promote crystallite growth and broader dispersion in crystallite sizes. Energy dispersive X-ray spectroscopy indicates that zinc loss is noticeable when [NaOH] ≥ 0.2 mol/L. XRD revealed also a significant less-crystalline phase contribution alongside the main peaks of the nanocrystalline cubic spinel ferrite phase. The less-crystalline fraction is lower for the ferrite obtained with 0.2 mol/L of NaOH, being about 50% and more than 70% for the other samples. Despite of the less-crystalline fraction and the excess of iron, no secondary phases were detected. The Warren curves showed that the concentration of NaOH significantly influences the microstrain in the crystallites, being smaller for the sample obtained with NaOH at 0.2 mol/L. The sample prepared with this condition presented the better properties to be used as magnetic tracer in clinical diagnoses combining small mean crystallite size, low microstrain, which resulted in materials with higher magnetic saturation and high surface charge under blood pH.
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Affiliation(s)
- Rodrigo U Ichikawa
- Instituto de Pesquisas Energéticas e Nucleares, S ão Paulo, SP 05508-000, Brazil
| | - João P R L L Parra
- Universidade Estadual Paulista, Júlio de Mesquita Filho, UNESP, Botucatu, SP 18618-970, Brazil
| | - Murillo L Martins
- Niels Bohr Institute, University of Copenhagen, Blegdamsvej 17, 2100 Copenhagen, Denmark
| | - Walter K Yoshito
- Instituto de Pesquisas Energéticas e Nucleares, S ão Paulo, SP 05508-000, Brazil
| | - Margarida J Saeki
- Universidade Estadual Paulista, Júlio de Mesquita Filho, UNESP, Botucatu, SP 18618-970, Brazil
| | - Xavier Turrillas
- Institut de Ciència de Materials de Barcelona, Campus de la UAB 08193 Bellaterra, Spain
| | - Luis G Martinez
- Instituto de Pesquisas Energéticas e Nucleares, S ão Paulo, SP 05508-000, Brazil
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Martins ML, Ignazzi R, Eckert J, Watts B, Kaneno R, Zambuzzi WF, Daemen L, Saeki MJ, Bordallo HN. Restricted mobility of specific functional groups reduces anti-cancer drug activity in healthy cells. Sci Rep 2016; 6:22478. [PMID: 26932808 PMCID: PMC4773877 DOI: 10.1038/srep22478] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2015] [Accepted: 02/08/2016] [Indexed: 12/23/2022] Open
Abstract
The most common cancer treatments currently available are radio- and chemo-therapy. These therapies have, however, drawbacks, such as, the reduction in quality of life and the low efficiency of radiotherapy in cases of multiple metastases. To lessen these effects, we have encapsulated an anti-cancer drug into a biocompatible matrix. In-vitro assays indicate that this bio-nanocomposite is able to interact and cause morphological changes in cancer cells. Meanwhile, no alterations were observed in monocytes and fibroblasts, indicating that this system might carry the drug in living organisms with reduced clearance rate and toxicity. X-rays and neutrons were used to investigate the carrier structure, as well as to assess the drug mobility within the bio-nanocomposite. From these unique data we show that partial mobility restriction of active groups of the drug molecule suggests why this carrier design is potentially safer to healthy cells.
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Affiliation(s)
- Murillo L Martins
- Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark.,Instituto de Biociências - Universidade Estadual Paulista - CP 510, 18618-970 Botucatu-SP, Brazil
| | - Rosanna Ignazzi
- Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark
| | - Juergen Eckert
- Department of Chemistry, University of South Florida, 4202 E. Fowler Ave., Tampa, Florida 33620, United States.,Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Benjamin Watts
- Swiss Light Source, Paul Scherrer Institute, CH-5232 Villigen, Switzerland
| | - Ramon Kaneno
- Instituto de Biociências - Universidade Estadual Paulista - CP 510, 18618-970 Botucatu-SP, Brazil
| | - Willian F Zambuzzi
- Instituto de Biociências - Universidade Estadual Paulista - CP 510, 18618-970 Botucatu-SP, Brazil
| | - Luke Daemen
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Margarida J Saeki
- Instituto de Biociências - Universidade Estadual Paulista - CP 510, 18618-970 Botucatu-SP, Brazil
| | - Heloisa N Bordallo
- Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark.,European Spallation Source ESS AB, PO Box 176, SE-221 00 Lund, Sweden
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Martins ML, Calabresi MF, Quini C, Matos JF, Miranda JR, Saeki MJ, Bordallo HN. Enhancing the versatility of alternate current biosusceptometry (ACB) through the synthesis of a dextrose-modified tracer and a magnetic muco-adhesive cellulose gel. Materials Science and Engineering: C 2015; 48:80-5. [DOI: 10.1016/j.msec.2014.11.059] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2014] [Accepted: 11/22/2014] [Indexed: 02/06/2023]
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Martins ML, Orecchini A, Aguilera L, Eckert J, Embs J, Matic A, Saeki MJ, Bordallo HN. Encapsulation of paclitaxel into a bio-nanocomposite. A study combining inelastic neutron scattering to thermal analysis and infrared spectroscopy. EPJ Web of Conferences 2015. [DOI: 10.1051/epjconf/20158302011] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Martins ML, Ignazzi R, Jacobsen H, de Araujo DR, Yokaichiya F, Saeki MJ, de Paula E, Bordallo HN. Encapsulation effects on the structure-dynamics on drug carriers revealed by neutron scattering. ACTA ACUST UNITED AC 2014. [DOI: 10.1080/10448632.2014.955712] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Floriano EA, Scalvi LVA, Saeki MJ, Sambrano JR. Preparation of TiO2/SnO2 thin films by sol-gel method and periodic B3LYP simulations. J Phys Chem A 2014; 118:5857-65. [PMID: 24824227 DOI: 10.1021/jp411764t] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Titanium dioxide (TiO2) thin films are grown by the sol-gel dip-coating technique, in conjunction with SnO2 in the form of a heterostructure. It was found that the crystalline structure of the most internal layer (TiO2) depends on the thermal annealing temperature and the substrate type. Films deposited on glass substrate submitted to thermal annealing until 550 °C present anatase structure, whereas films deposited on quartz substrate transform to rutile structure at much higher temperatures, close to 1000 °C, unlike powder samples where the phase transition takes place at about 780 °C. When structured as rutile, the oxide semiconductors TiO2/SnO2 have very close lattice parameters, making the heterostructure assembling easier. The SnO2 and TiO2 have their electronic properties evaluated by first-principles calculations by means of DFT/B3LYP. Taking into account the calculated band structure diagram of these materials, the TiO2/SnO2 heterostructure is qualitatively investigated and proposed to increase the detection efficiency as gas sensors. This efficiency can be further improved by doping the SnO2 layer with Sb atoms. This assembly may be also useful in photoelectrocatalysis processes.
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Affiliation(s)
- Emerson A Floriano
- Department of Physics, UNESP, São Paulo State University , CEP 17033-360, Bauru, São Paulo, Brazil
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Castro RSD, Caetano L, Ferreira G, Padilha PM, Saeki MJ, Zara LF, Martines MAU, Castro GR. Banana Peel Applied to the Solid Phase Extraction of Copper and Lead from River Water: Preconcentration of Metal Ions with a Fruit Waste. Ind Eng Chem Res 2011. [DOI: 10.1021/ie101499e] [Citation(s) in RCA: 119] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Renata S. D. Castro
- FEIS-UNESP, Dept. de Fitotecnia, Tecnologia de Alimentos e Sócio Economia, C.P. 31, 15385-000 Ilha Solteira, SP, Brazil
| | - Laércio Caetano
- FEIS-UNESP, Dept. de Física e Química, C.P. 31, 15385-000 Ilha Solteira, SP, Brazil
| | - Guilherme Ferreira
- IB-UNESP, Dept. Química e Bioquímica, C.P. 510, 18618-000 Botucatu, SP, Brazil
| | - Pedro M. Padilha
- IB-UNESP, Dept. Química e Bioquímica, C.P. 510, 18618-000 Botucatu, SP, Brazil
- INCT de Bioanalítica − UNICAMP, C.P. 6154, 13084-971 Campinas, SP, Brazil
| | - Margarida J. Saeki
- IB-UNESP, Dept. Química e Bioquímica, C.P. 510, 18618-000 Botucatu, SP, Brazil
| | - Luiz F. Zara
- UNB − Dept. Química, 73300-000 Planaltina, GO, Brazil
| | | | - Gustavo R. Castro
- IB-UNESP, Dept. Química e Bioquímica, C.P. 510, 18618-000 Botucatu, SP, Brazil
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Rodella CB, Nunes LAO, Saeki MJ, Padilha PM, Florentino AO. Caracterização textural e estrutural de V2O5/TiO2 obtidos via sol-gel: comparação entre secagem convencional e supercrítica. QUIM NOVA 2002. [DOI: 10.1590/s0100-40422002000200007] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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