N
Nivaldo Cabral Kuhnen
Researcher at Universidade Federal de Santa Catarina
Publications - 41
Citations - 585
Nivaldo Cabral Kuhnen is an academic researcher from Universidade Federal de Santa Catarina. The author has contributed to research in topics: Wurtzite crystal structure & Bentonite. The author has an hindex of 12, co-authored 41 publications receiving 485 citations.
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Geopolymer synthetized from bottom coal ash and calcined paper sludge
Rozineide A. Antunes Boca Santa,Adriano Michael Bernardin,Humberto Gracher Riella,Nivaldo Cabral Kuhnen +3 more
TL;DR: In this article, bottom ash (SiO2/Al2O3) was used as source of aluminosilicate and sodium hydroxide (NaOH = 5, 10 and 15 m) and sodium silicate (Na2SiO3, SiO2 /Na2O= 1.58) were used as alkaline medium.
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Factorial design as tool in chitosan nanoparticles development by ionic gelation technique
Andréia Lange de Pinho Neves,Camila Cardoso Milioli,Leidiani Müller,Humberto Gracher Riella,Nivaldo Cabral Kuhnen,Hellen Karine Stulzer +5 more
TL;DR: In this paper, an ionic gelation technique was applied to form nanoparticles through linkages between tripolyphosphate (TPP) and chitosan (CTS) and the formulation was optimized using a 2 3 factorial design to analyze the effect of the pH, CTS:TPP ratio and acetic acid concentration in size and charge of the particles.
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Synthesis of 4A zeolites from kaolin for obtaining 5A zeolites through ionic exchange for adsorption of arsenic
Carolina Resmini Melo,Humberto Gracher Riella,Nivaldo Cabral Kuhnen,Elidio Angioletto,Aline Resmini Melo,Adriano Michael Bernardin,Márcio Roberto da Rocha,Luciano da Silva +7 more
TL;DR: In this paper, the intent of this study was to obtain 4A zeolites from kaolin in order to obtain 5A Zeolites through ionic exchange with the previously synthesized zeolite.
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Synthesis and characterization of Y zeolites from alternative silicon and aluminium sources
Larissa Bento Bortolatto,Rozineide A. Antunes Boca Santa,Jarina Costa Moreira,Diego Bitencourt Machado,Maria Ana Pignatel Marcon Martins,Márcio Antônio Fiori,Nivaldo Cabral Kuhnen,Humberto Gracher Riella +7 more
TL;DR: In this paper, an experimental design was carried out as a tool to evaluate the effects of time and temperature parameters and they influence on the crystallization of zeolites with analytical reagents.
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Organophilic treatments of bentonite increase the adsorption of aflatoxin B1 and protect stem cells against cellular damage
Janaína Nones,Jader Nones,Anicleto Poli,Andréa Gonçalves Trentin,Humberto Gracher Riella,Nivaldo Cabral Kuhnen +5 more
TL;DR: Results indicate that the two materials tested may protect the neural crest stem cells against damage caused by AFB1, and these two materials that were created by organophilic treatments were not found to be toxic to stem cells.