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Pirólise de resíduos cervejeiros para a produção de adsorventes
(Universidade Federal de Santa Maria, 2020-02-13)
Contamination of water by organic compounds can cause damage to the environment and to humans. Adsorption is a promising process for removing these pollutants. In addition, the adsorbents used can be regenerated. Agricultural ...
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 ...
Avaliação da adsorção de indio (III) através de redes neuronais artificiais e modelos difusivos de transferência de massa
(Universidade Federal de Santa Maria, 2021-06-11)
Technological development has increased the consumption of indium in the last decade and is currently classified as a critical material due to its scarcity. Its main application is related to the production of liquid crystal ...
Desenvolvimento de materiais a base de quitina para aplicação na adsorção de corantes
(Universidade Federal de Santa Maria, 2021-02-24)
The environmental problems due to the accelerated industrialization of the last decades have caused in society the need to develop new technologies for the treatment of industrial waste. The textile industry stands out due ...
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 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 ...