Buscar
Itens para a visualização no momento 11-20 of 35
Adsorção de níquel (II) usando leito fixo de carvão ativado em condições subcríticas
(Universidade Federal de Santa Maria, 2020-02-27)
In the present work, the use of subcritical conditions in the nickel adsorption process on activated carbon in a fixed bed was investigated in the aqueous medium, with variation of the values for different pressure (from ...
Potencial de hidróxidos duplos lamelares de Zn-Al e Mg-Fe para adsorção de 2-nitrofenol
(Universidade Federal de Santa Maria, 2020-02-28)
Two Zn-Al and Mg-Fe layered double hydroxides (LDH) were synthesized by coprecipitation method in order to increase the adsorption potential of 2-nitrophenol (2-NP). Both adsorbents were characterized by the techniques of ...
Síntese e caracterização de hidróxidos duplos lamelares para adsorção de o-nitrofenol de soluções aquosas
(Universidade Federal de Santa Maria, 2020-10-08)
In this work, layered double hydroxides (LDHs) based on calcium-aluminium (Ca-Al), nickel-aluminium (Ni-Al) and zinco-aluminium (Zn-Al) were evaluated at adsorptive removal of o-nitrophenol from aqueous solutions. The ...
Preparação de carvão ativado a partir de casca de amendoim para uso como adsorvente na remoção de poluentes orgânicos em soluções aquosas
(Universidade Federal de Santa Maria, 2016-03-03)
The contamination of water bodies by dye containing effluents is harmful for the environment and human health. In this way, several techniques have been used to remove dyes from colored effluents. Adsorption stands out, ...
Utilização de diferentes materiais como adsorventes na remoção de nitrogênio amoniacal
(Universidade Federal de Santa Maria, 2015-01-09)
The discharge of effluents without proper treatment, in water bodies has been one of the main environmental problems in aquatic systems. Macronutrients launched, such as nitrogen can cause the effect known as eutrophication ...
Preparação de carvão ativado a partir de resíduos de erva-mate e seu uso como adsorvente na remoção de poluente orgânico em solução aquosa
(Universidade Federal de Santa Maria, 2013-08-13)
Activated carbon prepared from yerba mate (Ilex Paraguariensis) has been used as adsorbent for the removal of tannery dye from aqueous solution. The activated carbon was prepared by pyrolysis process, under nitrogen ...
Modelagem e estimação de parâmetros da adsorção de corantes em carvão ativado
(Universidade Federal de Santa Maria, 2011-09-30)
The adsorption of dyes on activated carbon has been extensively studied in
the past three decades. However, much due to the difficult to implement numerical
procedures, these studies have been carried out without the ...
Adsorção de metais (Au, Cu e Ni) presentes em lixiviados de contactores de telefones celulares
(Universidade Federal de Santa Maria, 2016-04-06)
In this work, chitin (CTN), chitosan (CTS) and activated carbon (AC) were used as adsorbents to recover metals (Au, Ni and Cu) from leachates of mobile phone wastes. The mobile phone wastes (contactors) were collected and ...
Adsorção de herbicidas utilizando biochar obtido a partir de resíduos de madeira
(Universidade Federal de Santa Maria, 2022-02-26)
Residues of sawdust of the forest species Cedrela fissilis were modified, with a part of the
sample being only physically modified (BCC), while the other was also chemically activated
with zinc chloride (ZnCl2) as an ...
Síntese de compósito de carbono a partir de resíduo de vitivinicultura para adsorção de contaminantes emergentes
(Universidade Federal de Santa Maria, 2022-02-25)
This work proposed the synthesis of a carbon composite (CC) chemically activated with ZnCl2. This CC was obtained from the pyrolysis of composted viticulture residue. The material was characterized by FT-IR (Fourier transform ...