A5033146834- Adsorption and biosorption for pollutant removal
- Analytical chemistry methods development
- Heavy metals in environment
- Gas Sensing Nanomaterials and Sensors
- TiO2 Photocatalysis and Solar Cells
- Electrochemical Analysis and Applications
- Advanced Photocatalysis Techniques
- Water Quality and Pollution Assessment
- Nanomaterials for catalytic reactions
- Chemical Synthesis and Characterization
- Recycling and Waste Management Techniques
- Analytical Chemistry and Sensors
- ZnO doping and properties
- Extraction and Separation Processes
- Water Quality Monitoring and Analysis
- Cassava research and cyanide
- Heavy Metals in Plants
- Wastewater Treatment and Reuse
- Advanced Cellulose Research Studies
- Advanced oxidation water treatment
- Phosphorus and nutrient management
- Iron oxide chemistry and applications
- Mesoporous Materials and Catalysis
- Transition Metal Oxide Nanomaterials
- Polymer Science and PVC
Universidade de São Paulo
2022-2024
Universidade Estadual Paulista (Unesp)
2012-2023
University of Twente
2018
Centro Universitário de Araraquara
2016
A microporous Sn2+-containing SnO2 material presenting microrod morphology and a surface area of 93.0 m2 g-1 was synthesized via simple hydrothermal route. Sn2+ ions were detected in the interior (15.8 at.%) after corrosion sample through sputtering. The material's optical properties have demonstrated absorption considerable fraction visible light up to wavelengths 671 nm, due presence states band structure. analysis internal crystalline structure single carried out with aid focused ion beam...
This work reports the sol-gel synthesis of an SBA-15 silica and its functionalization with 4-amino-2-mercaptopyrimidine to perform adsorption metal species from aqueous media.The material was confirmed using FTIR specific surface area measurements.The final tested through batch experiments uncover adsorptive properties toward Cu(II), Cd(II), Zn(II), Pb(II), Ni(II).Contact time pH conditions were investigated, presented slow kinetics, which best described by pseudo-second order model.In...
In this study, a green adsorbent made of corn leaf powder was applied in the removal Cu(II) and Cd(II) from water samples. The material characterized by Fourier transform infrared (FTIR) spectroscopy, which indicated existence amine (1375 1249 cm-1) carboxylic groups (1730 cm-1). Elemental analysis corroborated results FTIR, indicating that substance consisted 0.63% sulfur 0.46% nitrogen. NMR thiamine methionine may be present substances, can act coordination with metal species. Scanning...
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 reaction was investigated through Fourier Transform Infrared Spectroscopy (FTIR) and X-ray Photoelectron (XPS) analysis. According to our findings, S-H groups are responsible molecule attachment nitrogen atoms directly involved in metal ion coordination. These results agreement pseudo-second-order kinetic model, which infers that chemisorption...
Cassava husks were undergone to simple processes obtain a fine powder whose particle diameter varied from 63 μm 75 μm. The characterization of the material indicated presence groups alcohol, amine and thiocarbonyl. was tested through batch experiments effect contact time pH over adsorption Cd(II) ions evaluated. presented rapid kinetic equilibrium, which reached in less than 1 min, highest uptake occurred at 5. optimum conditions obtained applied determine material’s maximum capacity with...
The synthesis of an organofunctionalized mesoporous silica was accomplished by a two-step process involving (1) the co-condensation silylant agent at surface silica, followed (2) immobilization Purpald (ligand) organic termination silytant agent. characterization material indicated presence NH2 groups, and ligand confirmed 29Si- 13C-nuclear magnetic resonance. material’s area determined as 370 m2 g−1. Batch adsorption experiments enabled determination optimum pH conditions for Cu(II) Cd(II)....
The identification and quantification of different contaminants in natural waters have been widely disseminated scientific journals. In the last two decades, removal from aqueous samples drugs their metabolites, also called emerging contaminants, highlighted. problem existence environment, besides its persistence, is related to occurrence more resistant bacteria, being a serious risk health. Thus, objectives this project were characterization cattail leaves, Typha angustifolia L. natura,...
Using straightforward and cost-effective methods, persimmon leaves were converted into a high-quality powder. This powder was applied as an adsorbent for the removal of Cu(II) Cd(II) from aqueous solutions. Scanning electron microscopy (SEM) indicated presence particles with non-homogeneous sizes rough texture. Elemental analysis EDX technique confirmed elements such sulfur, phosphorus, nitrogen, oxygen. The results 13C nuclear magnetic resonance (13C-NMR), obtained through...
Cocondensation and postfunctionalization methods were employed to synthesize a mesoporous silica with large surface area (795.1 $\pm $ 1.1 m$^{2}$ g$^{-1})$ modified 4-amino-5-hydrazino-1,2,4-triazole-3-thiol, which was successfully applied adsorb preconcentrate Cu(II), Co(II), Cd(II) from aqueous media. Infrared spectroscopy of the adsorbent material demonstrated N-H stretching bonds related primary amines existing in ligand molecule, elemental analysis revealed presence 0.132 mmol g$^{-1}$...
Sewage treatment plants in Ilha Solteira City, which consist of stabilization ponds, have been modifying water and sediment characteristics around sewage outfall area.Water quality parameters such as dissolved oxygen (OD) conductivity were directly influenced by the outfall.OD values reported before (6.36 mg L -1 ) after (2.94 outfall.Measurement organic matter content showed same pattern, with 1.34% 4.80% for SP1 SP3 samples, respectively.A copper zinc analysis indicated that metals are...
Abstract A Sn 2+ -containing SnO 2 material was synthesized via a simple hydrothermal route, and its characterization demonstrated that it presented microrod morphology with rutile crystalline structure. ions were detected in the interior of no other impurities, such as tin oxide phases (Sn O 3 , 4 SnO) detected. The material’s optical properties have shown absorption considerable fraction visible light up to wavelengths 671 cm -1 contrastingly ordinary . analysis internal structure single...
Using straightforward and cost-effective methods, persimmon leaves were converted into high-quality powder. This powder was applied as an adsorbent for the removal of Cu(II) Cd(II) from aqueous solutions. Scanning electron microscopy (SEM) revealed presence particles with non-homogeneous sizes rough textures. The biosorbent exhibited a specific surface area approximately 0.44 ± 0.015 m2 g−1. Elemental analysis energy-dispersive X-ray spectroscopy (EDX) confirmed elements such sulfur,...
This paper describes the preparation and use of a low cost biosorbent made castor leaves for extraction Cu(II) from an aqueous medium. The was characterized by Fourier transform infrared spectroscopy (FTIR), surface area pore diameter measurements. results showed absorption bands carboxylic amide groups at 1738 1540 cm-1, respectively, measured 1.3728 0.0160 m2 g-1, with predominance microporous < 10.51 A. Quantitative achieved pH above 4 kinetic equilibrium reached within 10 minutes....