Point Of Zero Charge Pzc
Mostrando 1-9 de 9 artigos, teses e dissertações.
-
1. Production of nanostructured crystalline composite using residual ashes from flocculated sludge burning process in a poultry slaughterhouse wastewater treatment system
Abstract Nanostructured crystalline composite (activated carbon) was synthesized from residual ashes of the burning process of the sludge generated in the flotation step of a poultry slaughterhouse and was used for Allura red dye adsorption. The ashes were chemically activated using two types of reagents, H2O2 and H3PO4, and the structure, morphology, and su
Cerâmica. Publicado em: 2022
-
2. Yellow Mombin (Spondias mombin L.) Seeds from Agro-Industrial Waste as a Novel Adsorbent for Removal of Hexavalent Chromium from Aqueous Solutions
The objective of this study was to develop a low-cost and eco-friendly adsorbent from agro-industrial waste for the removal of hexavalent chromium in the aqueous medium. The adsorbent (BMC) produced from yellow mombin (Spondias mombin L.) seeds was characterized by the determination of the chemical composition, thermal analysis (thermogravimetric (TG) analys
J. Braz. Chem. Soc.. Publicado em: 2021-02
-
3. Magnetic Solid-Phase Microextraction for Lead Detection in Aqueous Samples Using Magnetite Nanoparticles
A magnetic solid-phase microextraction procedure was developed to detect lead in aqueous samples by flame atomic absorption spectrometry (FAAS). Fe3O4 nanoparticles were synthesized by coprecipitation and the crystalline phase was confirmed by X-ray diffraction. The point of zero charge (PZC) indicated that the oxide surface was negatively charged at pH leve
J. Braz. Chem. Soc.. Publicado em: 2020-01
-
4. Characterization of Pequi (Caryocar brasiliense) Shells and Evaluation of Their Potential for the Adsorption of PbIIIons in Aqueous Systems
In this study pequi (Caryocar brasiliense) shells were evaluated in relation to their potential for the adsorption of PbII ions in aqueous systems. The adsorbent was characterized by point of zero charge (PZC), Fourier transform infrared spectroscopy (FTIR), and scanning electron microscopy-energy dispersive spectroscopy (SEM-EDS) and PbII ions were detected
J. Braz. Chem. Soc.. Publicado em: 2016-03
-
5. Cargas superficiais da fração argila de solos influenciadas pela vinhaça e fósforo
Effects of vinasse, P sorption and the interaction vinasse-phosphorus on zeta potential and point of zero charge (PZC) as well as the effects of vinasse on P sorption on clay-fraction samples from two soils were evaluated. The vinasse and P sorption influenced the surface charge of clay fraction of both soils. Sorption of P increased negative charges from so
Química Nova. Publicado em: 2011
-
6. Adsorção de corantes em turfa de origem Magalhânica / Absorption dyes om Magallanic peat
The aim of this work was to study the removal of dyes Naphthol Blue Black (NBB) and Maxilon Blue 5G (MB) in the aqueous phase by adsorption on Magellan peat. According to the peat physicochemical characterization, the carboxylic, phenolic, hydroxyl and methyl amines were identified as the main functional groups, that giving it a preferably negative charge an
Publicado em: 2011
-
7. SÍNTESE E CARACTERIZAÇÃO DE HÍBRIDOS À BASE DE ALGINATO DE SÓDIO E ESCAMAS DE PEIXE PARA USO NA REMOÇÃO DE ESPÉCIES POLUENTES / SYNTHESIS AND CHARACTERIZATION OF HYBRIDS BASED SODIUM ALGINATE AND FISH SCALES FOR USE IN REMOVAL OF POLLUTANT SPECIES
With the purpose to develop environmentally appropriate materials, scales of the Piau fish and sodium alginate were used as precursor materials for the preparation of new ecomaterials which were used in the removal of the herbicide Paraquat and ions Co(II) and Cu(II). The hybrid material obtained from the reaction between the polysaccharide and scales was de
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/02/2010
-
8. Application of vinasse in soils: effect on soil charges and particle dispersion / AplicaÃÃo de vinhaÃa em solos: efeito no balanÃo de cargas e dispersÃo de partÃculas
The vinasse is the main byproduct of the ethanol and sugarcane brand production; these activities are in large expansion in Brazil. For a long time the vinasse was launched into water courses, generating negative environmental impacts. One of the alternatives for producers to get rid of vinasse is its addition in soils as fertilizer. Although the effects of
Publicado em: 2009
-
9. Immersion enthalpy variation of surface-modified mineral activated carbon in lead (II) aqueous solution adsorption: the relation between immersion enthalpy and adsorption capacity
An activated carbon was obtained by chemical activation with phosphoric acid, CM, from a mineral carbon. Afterwards, the carbon was modified with 2 and 5 molL-1, CMox2 and CMox5 nitric acid solutions to increase the surface acid group contents. Immersion enthalpy at pH 4 values and Pb2+ adsorption isotherms were determined by immersing activated carbons in a
Eclética Química. Publicado em: 2006