Publications by authors named "Rafael Luan Sehn Canevesi"
The main goal of this study was to assess alternatives to the current challenges on environmental quality and circular economy. The former is here addressed by the treatment of radioactively contaminated solutions, and the latter by using abundant and low-cost biomass. In this paper, we examine the biosorption of hexavalent uranium (U(VI)) in a batch system using the macrophytes Limnobium laevigatum and Azolla sp.
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- Understanding the textural properties of hierarchical porous carbons (HPCs) is crucial for choosing the right materials for various applications and comprehending their behavior in systems.
- Gas adsorption-desorption isotherms and density functional theory (DFT) models are commonly used for this characterization, but fixed pore shape boundaries can lead to inaccuracies in pore size distributions (PSDs).
- A new dual-shape DFT model allows for simultaneous analysis of nitrogen and carbon monoxide adsorption data, improving accuracy by adjusting pore shape boundaries, thus reducing artifacts in PSDs.
Article Synopsis
- A silicon-based microanalytical prototype effectively detected volatile organic compounds (VOCs) in indoor air at extremely low concentrations (ppb levels).
- The study utilized novel materials, including a tannin-derived carbon, a MIL-101(Cr) MOF, and a DaY zeolite, to enhance the preconcentration of BTEX compounds such as benzene and toluene.
- The DM2C adsorbent showed outstanding performance with high stability and repeatability over four months and 500 tests, enabling quick and reliable detection of VOCs, even in humid conditions.
Calcium alginate beads, inactivated Saccharomyces cerevisiae and inactivated S. cerevisiae immobilized in calcium alginate beads (S. cerevisiae-calcium alginate beads) are examined as potential biosorption materials as regards their capacity to remove Am.
View Article and Find Full Text PDFRice and coffee husks (raw and chemically activated) are examined as potential biosorption materials regarding their capacity to remove U (total), Am, and Cs. The physical parameters evaluated were the morphological characteristics of the biomass, real and apparent density, and surface area. Contact times for the batch experiments were 0.
View Article and Find Full Text PDFBiosorption-based technologies have been proposed for the removal of radionuclides from radioactive liquid waste containing organic compounds. Nevertheless, pytoremediation potential of uranium (U) by nonliving aquatic macrophytes Lemna sp. and Pistia stratiotes has not been previously addressed.
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