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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 ...
Modificação de nanotubos de carbono por impregnação de nanopartículas metálicas via síntese verde para adsorção de glifosato
(Universidade Federal de Santa Maria, 2021-09-27)
In the present work, commercial multiwalled carbon nanotubes (MWCNTs) were modified
via green synthesis for impregnation of metallic nanoparticles (MPNs), evaluating the
influence of plant extracts (pomegranate leaves, ...
Alumina ativada hidroxilada aplicada na remoção de íons fluoreto da água – um estudo através da metodologia de planejamento experimental
(2022-08-08)
Fluoride concentration is an important parameter that must be monitored in drinking water sincewater fluoridation, within the recommended doses, is an essential tool to prevent dental cavitiesin the population. Although, ...
Alumina ativada modificada por ozonização: preparação, caracterização e aplicação na remoção de íons fluoreto presentes em água subterrânea
(Universidade Federal de Santa Maria, 2021-08-31)
Fluoride concentration in drinking water is an important parameter to be monitored. At concentrations between 0.6 and 1.5 mg L-¹, it promotes an improvement in population oral health, preventing tooth decay. However, the ...
Impregnação de cério em alumina ativada para a desfluoretação de águas
(Universidade Federal de Santa Maria, 2021-06-29)
Fluoride ion (F-
) is commonly found in groundwater used for water supply and presents health
risks when consumed in excess. Several treatments are studied for water defluoridation,
adsorption being one of the most used ...
Produção de nanofibras de poliacrilonitrila modificadas com Cyanex 272 na recuperação de gálio
(Universidade Federal de Santa Maria, 2020-03-06)
The objectives of this work were to develop polyacrylonitrile (PAN) nanofibers modified with the commercial Cyanex 272 extractor (bis-2,4,4-trimethylpentyl phosphinic acid) and apply them for the recovery of gallium present ...