Stella F. Valle

Efficient production of activated carbon from biomass waste for the removal of interferents in lanthanides-based luminescent sensors

Tayra Rodrigues Brazil, Amanda S. Giroto, Stella F. Valle, E.J. Corat et autres

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Residue-based synthesis of potassium zeolites for mercury immobilization in Amazonian soils: On the valorization of multilayer package waste with unexpensive silica sources

Roger Borges, Matheus Bortolanza Soares, Stella F. Valle, Camila Cristina Vieira Velloso et autres

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Polysulfides From Inverse Vulcanization Used in Electronic Tongues for Heavy Metal Sensing

Stella F. Valle, Andrey Coatrini Soares, Mário Popolin Neto, Cauê Ribeiro et autres

ABSTRACT Polysulfides (PS) are versatile sulfur‐rich polymers synthesized via the inverse vulcanization of elemental sulfur, a simple one‐pot method that transforms an abundant, low‐cost residue into a functional material. In this work, we employed different PS structures as sensing units in an …

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Encapsulation of Acidithiobacillus thiooxidans in Sulfur-Loaded Hydrogel Films for Increased Nutrient Uptake by Plants

Stella F. Valle, Amanda S. Giroto, Gelton Geraldo Fernandes Guimarães, Cauê Ribeiro

High Resolution Image Download MS PowerPoint Slide Designing smart carrier materials for inoculants used in agriculture is essential to ensuring proper shelf life and cell survival in soil. Herein, we propose to encapsulate Acidithiobacillus thiooxidans and elemental sulfur (ES) particles in a …

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Aluminosilicate and zeolitic materials synthesis using alum sludge from water treatment plants: Challenges and perspectives

Raquel Cardoso Machado, Stella F. Valle, Thais Beatriz Miqueleti Sena, Paul Esteban Pherez Perrony et autres

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Polyglycerol citrate: A novel coating and inoculation material for soybean seeds

Amanda S. Giroto, Stella F. Valle, Gelton Geraldo Fernandes Guimarães, Benedict Ohrem et autres

The microbial inoculation of legumes such as soybeans is crucial for thriving plant growth due to symbiotic nitrogen (N) fixation and biological plant N fertilization. Soybean requires microbial pre-inoculation before sowing using the rhizobia strain Bradyrhizobium japonicum. Peat is typical for this …

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Valorization of Alum Sludge Waste through Zeolite Synthesis for Sustainable Fertilizer Production

Raquel C. Machado, Stella F. Valle, Iara Regina Soares Chao, Cauê Ribeiro

Alum sludge (AS) from water treatment plants is an abundant, non-toxic residue with high Si and Al contents. These characteristics make it an ideal precursor for zeolite synthesis, not only reducing the environmental impacts from AS disposal but also adding value to …

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Revealing the Structure Formation on Polyglycerol Citrate Polymers—An Environmentally Friendly Polyester as a Seed-Coating Material

Amanda S. Giroto, Stella F. Valle, Roger Borges, Luiz Alberto Colnago et autres

A detailed structural investigation of a promising bio-based polymer, polyglycerol citrate polyester, obtained by the bulk polycondensation of glycerol (Gly) against citric acid (Cit) under mild reaction was performed. The reaction in conditions with and without catalyst use (sulfuric acid, H2SO4) was …

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Unveiling the Role of Polysulfide Matrices in Phosphate Diffusion for Controlled Release Fertilizers

Stella F. Valle, Amanda S. Giroto, Cauê Ribeiro

Phosphate rock and struvite (ST) dispersion in a polysulfide (PS) matrix offers a sustainable alternative for phosphorous (P) fertilization, as it can favor P dissolution and control its release, while also being a sulfur fertilizer. Herein, we discuss the PS permeability mechanism …

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Revealing the Structure Formation on Polyglycerol Citrate Polymers – an Environmentally Friendly Polyester as a Coating Material

Amanda S. Giroto, Stella F. Valle, Roger Borges, Luiz Alberto Colnago et autres

A detailed structural investigation of a promising bio-based polymer, polyglycerol citrate poly-ester, obtained by bulk polycondensation of glycerol (Gly) against citric acid (Cit) under mild reaction was performed. This polymer was suggested to be well suited for coating seeds or similar agricultural …

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Struvite-based composites for slow-release fertilization: a case study in sand

Stella F. Valle, Amanda S. Giroto, Vitalij Dombinov, Ana A. Robles-Aguilar et autres

Struvite (St) recovered from wastewaters is a sustainable option for phosphorus (P) recovery and fertilization, whose solubility is low in water and high in environments characterized by a low pH, such as acidic soils. To broaden the use of struvite in the …

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Co-Application of Porous Polysulfide Pellets with Acidithiobacillus thiooxidans Improves Sulfate Availability in Soil

Stella F. Valle, Amanda S. Giroto, Rodrigo Klaic, Denise Bevilaqua et autres

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