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Itens para a visualização no momento 21-30 of 33
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 ...
Potencial de biossorventes de baixo custo na remoção dos corantes violeta cristal e fucsina básica em sistema contínuo e descontínuo de adsorção
(Universidade Federal de Santa Maria, 2020-08-28)
The potential of pecan pericarp (Carya illinoensis), Pacara Earpod tree seed residues
(Enterolobium contortisilquum), and ironwood seed residues (Caesalpinia leiostachya)
were evaluated for the removal of crystal violet ...
Desenvolvimento e caracterização de um compósito HDL/biocarvão para adsorção de corante vermelho do Congo
(Universidade Federal de Santa Maria, 2022-08-29)
In this work the utilization of activated lychee peel biochar (ALPB) and Ca-Cr layered double
hydroxide for production of a composite was investigated. The CaCr/HDL-ALPB was
synthetized by coprecipitation and characterized ...
Avaliação das características de bio-óleo e biochar produzidos por pirólise a partir de biomassas lignocelulósicas
(Universidade Federal de Santa Maria, 2023-03-09)
Lignocellulosic biomass is considered one of the alternative renewable resources with the
potential to supply the high world energy demand, by reducing dependence on fossil fuels. The
use of this valuable resource as raw ...
Adsorção de corante alaranjado de metila aplicando hidróxidos duplos lamelares de Ca/Fe suportado em biochar de serragem de eucalipto
(Universidade Federal de Santa Maria, 2023-02-28)
Contamination of water resources is a topic much discussed by society due to the serious
problems it entails for public health. Among several pollutants, dyes represent the largest
group of organic contaminants. In view ...
Preparação e caracterização de carvão ativado magnético obtido a partir da serragem de madeira sapelli (Entandrophragma cylindricum) para adsorção do corante azul brilhante
(Universidade Federal de Santa Maria, 2023-03-10)
The contamination of water bodies by dyes has been a problem to be fought because the large
amounts of effluents released into water bodies are harmful to the environment and living
beings. Thus, it is necessary to develop ...
Modificações na casca de arroz para a adsorção de azul de metileno em batelada e leito fixo
(Universidade Federal de Santa Maria, 2016-08-12)
In this work, rice husk and its modifications were investigated as methylene blue adsorbents, using discontinuous (batch) and continuous (fixed bed) adsorption operations. The rice husk was modified through alternative ...
Recuperação de cério e lantânio lixiviados de fosfogesso por adsorção utilizando resíduos de uva
(Universidade Federal de Santa Maria, 2023-08-25)
Phosphogypsum is a byproduct of the fertilizer industry with a high environmental impact,
formed during the production of phosphoric acid from phosphate rock. It mainly comprises
gypsum and may contain impurities, including ...