Search Results - "Claudio Airoldi"

Kinetics and thermodynamics of textile dye adsorption from aqueous solutions using babassu coconut mesocarp by Vieira, Adriana P., Santana, Sirlane A.A., Bezerra, Cícero W.B., Silva, Hildo A.S., Chaves, José A.P., de Melo, Júlio C.P., da Silva Filho, Edson C., Airoldi, Claudio

“…Extracted babassu coconut ( Orbignya speciosa) mesocarp (BCM) was applied as a biosorbent for aqueous Blue Remazol R160 (BR 160), Rubi S2G (R S2G), Red Remazol…”
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Organofunctionalized kenyaite for dye removal from aqueous solution by Royer, Betina, Cardoso, Natali F., Lima, Eder C., Ruiz, Vanusa S.O., Macedo, Thaís R., Airoldi, Claudio

“…Interaction of crystalline-layered silicic kenyaite organofunctionalized with N-3-trimethoxysilylpropylethylenediamine adsorbent with the Remazol Brilliant…”
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Some studies of crosslinking chitosan–glutaraldehyde interaction in a homogeneous system by Monteiro, Oyrton A.C, Airoldi, Claudio

“…Chitosan dissolved in acetic acid reacted with glutaraldehyde solution, ranging in concentration from 0.10 to 25.0×10 −2 mol dm 3. The modified polymers were…”
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Attachment of 2-aminomethylpyridine molecule onto grafted silica gel surface and its ability in chelating cations by Sales, Jose A.A., Faria, Flavia P., Prado, Alexandre G.S., Airoldi, Claudio

“…The chelate molecule, 2-aminomethylpyridine (AMP), was attached to previous chemical modified silica, to give a degree of pendant groups of 0.76 mmol per gram…”
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Epoxide silylant agent ethylenediamine reaction product anchored on silica gel – thermodynamics of cation–nitrogen interaction at solid/liquid interface by Sales, José A.A., Airoldi, Claudio

“…The silylant agent 3-glycidoxypropyltrimethoxysilane has the epoxide ring opened by incorporating an ethylenediamine molecule under homogeneous conditions, to…”
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Modified coupling agents based on thiourea, immobilized onto silica. Thermodynamics of copper adsorption by Oliveira, Fernando J.V.E., da Silva Filho, Edson C., Melo, Maurício A., Airoldi, Claudio

“…New silylating agents synthesized by incorporating the thiourea molecule into precursor agents containing increasing numbers of basic nitrogen atoms,…”
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Surface cellulose modification with 2-aminomethylpyridine for copper, cobalt, nickel and zinc removal from aqueous solution by Silva Filho, Edson Cavalcanti, Santos Júnior, Luiz Sousa, Silva, Marcia Maria Fernandes, Fonseca, Maria Gardênnia, Santana, Sirlane Aparecida Abreu, Airoldi, Claudio

“…Cellulose was first modified with thionyl chloride, followed by reaction with 2-aminomethylpyridine to yield 6-(2'-aminomethylpyridine)-6-deoxycellulose. The…”
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Removal of Cu(II), Fe(III), and Cr(III) from Aqueous Solution by Aniline Grafted Silica Gel by Jacques, Rosângela A., Bernardi, Renata, Caovila, Marcela, Lima, Eder C., Pavan, Flávio A., Vaghetti, Julio C. P., Airoldi, Cláudio

“…The aniline moiety was covalently grafted onto silica gel surface. The modified silica gel with aniline groups (SiAn) was used for removal of Cu(II), Fe(III),…”
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Sawdust Derivative for Environmental Application: Chemistry, Functionalization and Removal of textile dye from aqueous solution by Pinto, Thais F, Bezerra, Cícero W B, Silva, Domingos S A, Silva, Filho, Edson C DA, Vieira, Adriana P, Airoldi, Claudio, Melo, Júlio C P DE, Silva, Hildo A S, Santana, Sirlane A A

“…The adsorption of Violet Remazol 5R (VR 5) on wood sawdust modified with succinic anhydride (SSA) as a function of contact time, pH, and initial dye…”
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The Pesticide 3-(3,4-Dichlorophenyl)-1,1-dimethylurea (Diuron) Immobilized on Silica Gel Surface by Prado, Alexandre G.S., Airoldi, Claudio

“…A route for 3-(3,4-dichlorophenyl)-1,1-dimethylurea (diuron) immobilization on silica gel was established after reacting at the first stage the precursor…”
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Organofunctionalized Amazon smectite for dye removal from aqueous medium—Kinetic and thermodynamic adsorption investigations by Guerra, Denis L., Silva, Weber L.L., Oliveira, Helen C.P., Viana, Rúbia R., Airoldi, Claudio

“…The objective of this study is to examine the adsorption behavior of Sumifix Brilliant Orange 3R textile dye from aqueous solution on smectite sample, an…”
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New generation of sterically protected C18 stationary phases containing embedded urea groups for use in high-performance liquid chromatography by SILVA, César Ricardo, SALES FONTES JARDIM, Isabel Cristina, AIROLDI, Claudio

“…New monofunctional C18 urea stationary phases with sterically protecting dimethyl and diisopropyl groups were prepared by a single step modification process…”
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A new generation of more pH stable reversed phases prepared by silanization of zirconized silica by Silva, César R., Airoldi, Claudio, Collins, Kenneth E., Collins, Carol H.

“…To further extend our studies in the search for reversed phases with enhanced durability at high pH, zirconized silica has now been explored as an alternative…”
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The modified clay performance in adsorption process of Pb2+ ions from aqueous phase—Thermodynamic study by Guerra, Denis Lima, Lemos, Vanda Porpino, Angélica, Rômulo Simões, Airoldi, Claudio

“…Smectite clay sample from Acre state, Amazon region, Brazil, was used for pillaring and organofunctionalization process in the present study. The pillaring…”
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Enzymatic activity measured by microcalorimetry in soil amended with organic residues by Cenciani, Karina, Santos Freitas, Sueli dos, Critter, Silvana Auxiliadora Missola, Airoldi, Claudio

“…Enzymatic activity is an important property for soil quality evaluation. Two sequences of experiments were carried out in order to evaluate the enzymatic…”
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Preparation and characterization of a new C18 urea phase based on titanized silica by SILVA, Cesar R, AIROLDI, Claudio, COLLINS, Kenneth E, COLLINS, Carol H

“…A new stationary phase containing embedded urea groups (-NH-C(O)-NH-) was prepared by a procedure based on the synthesis of a trifunctional C18…”
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The toxic effect on soil microbial activity caused by the free or immobilized pesticide diuron by Prado, Alexandre G.S., Airoldi, Claudio

“…The pesticide diuron (3-(3,4-dichlorophenyl)-1,1-dimethylurea) was anchored onto silica gel to yield a new surface. Both free and immobilized pesticide were…”
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Evaluation of the applicability and the stability of a C18 stationary phase containing embedded urea groups by Silva, César Ricardo, Jardim, Isabel Cristina Sales Fontes, Airoldi, Claudio

“…Chromatographic evaluations of a new C18 urea phase in 150x3.9 mm HPLC columns, involving the separation of different test mixtures, indicate good performance…”
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Influence of the TiO2 content on the chromatographic performance and high pH stability of C18 titanized phases by SILVA, César R, AIROLDI, Claudio, COLLINS, Kenneth E, COLLINS, Carol H

“…To extend pH stability, protective metal oxide layers, such as titanium oxide, that are more stable in alkaline medium, can be chemically bonded to the…”
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Adsorption of a copper (II) complex on calcium phosphate intercalated with 4-aminobenzoic acid: synthesis and electrochemical investigation by Silva, Camila F. N., Souza, Fernando M. de, Santos, Jéssica P., Dias, Ana Paula B., Santana, Ana Paula R., Lazarin, Angélica M., Sernaglia, Rosana L., Andreotti, Elza I. S., Airoldi, Claudio

“…In this study, the adsorption isotherm of copper (II) on a calcium phosphate host intercalated with 4-aminobenzoic acid in an ethanol solution was…”
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