Regístrese
Buscar en
Ciência & Tecnologia dos Materiais
Toda la web
Inicio Ciência & Tecnologia dos Materiais Adsorption of phenol on silica aerogels using a stirred tank and a fixed bed col...
Journal Information
Vol. 29. Issue 1.
Materiais 2015
Pages e229-e233 (January - April 2017)
Share
Share
Download PDF
More article options
ePub
Vol. 29. Issue 1.
Materiais 2015
Pages e229-e233 (January - April 2017)
DOI: 10.1016/j.ctmat.2016.06.009
Adsorption of phenol on silica aerogels using a stirred tank and a fixed bed column
Visits
16
Joana Marquesa, Telma Matiasa, Artur J.M. Valenteb, António Portugala, Margarida J. Quinaa, Licínio Gando-Ferreiraa, Luísa Durãesa,
Corresponding author
luisa@eq.uc.pt

Corresponding author.
a CIEPQPF, Department of Chemical Engineering, University of Coimbra, Rua Sílvio Lima, 3030-790 Coimbra, Portugal
b CQC, Department of Chemistry, University of Coimbra, Rua Larga, 3004-535 Coimbra, Portugal
Article information
Abstract
Bibliography
Download PDF
Statistics
Abstract

The potential of a hydrophobic aerogel-like material for phenol adsorption from aqueous solutions was studied. Firstly, the effects of phenol concentration and adsorbent dosage on the adsorption equilibrium were investigated. The adsorption capacity of phenol at equilibrium increased with the increase of initial phenol concentration and decreased by increasing the adsorbent dosage. The optimum adsorbent dosage was 0.45g/45mL, corresponding to a removal percentage of 54% and a liquid-solid ratio of 100. Langmuir and Freundlich isotherm models fitted fairly the experimental equilibrium data, but the Freundlich model was adopted as the more suitable for describing the studied system. Secondly, the performance of the adsorbent was investigated by using two different system layouts: perfectly stirred tank in batch conditions, and fixed bed column tested in continuous regime. Pseudo-first and pseudo-second-order kinetic models were fitted to have an assessment on the kinetic parameters and adsorption mechanism. Finally, feasibility of chemical regeneration of the adsorbent, using an acid solution, and its effect on the phenol adsorption capacity were also examined. The changes in the chemical structure of the adsorbent after 4 regeneration cycles were assessed by Fourier transform infrared spectroscopy (FTIR). High regeneration efficiency of the adsorbent was observed in all performed cycles.

Keywords:
Adsorption
phenol
silica-based aerogel
equilibrium isotherms
kinetic models
batch and continuous regimes

Article

These are the options to access the full texts of the publication Ciência & Tecnologia dos Materiais
Subscriber
Subscriber

If you already have your login data, please click here .

If you have forgotten your password you can you can recover it by clicking here and selecting the option “I have forgotten my password”
Comprar
Comprar acceso al artículo

Comprando el artículo el PDF del mismo podrá ser descargado

Precio 22,50 €

Comprar ahora
Contact
Phone for subscriptions and reporting of errors
From Monday to Friday from 9 a.m. to 6 p.m. (GMT + 1) except for the months of July and August which will be from 9 a.m. to 3 p.m.
Calls from Spain
932 415 960
Calls from outside Spain
+34 932 415 960
E-mail
Article options
Tools
es en pt

¿Es usted profesional sanitario apto para prescribir o dispensar medicamentos?

Are you a health professional able to prescribe or dispense drugs?

Você é um profissional de saúde habilitado a prescrever ou dispensar medicamentos

es en pt
Política de cookies Cookies policy Política de cookies
Utilizamos cookies propias y de terceros para mejorar nuestros servicios y mostrarle publicidad relacionada con sus preferencias mediante el análisis de sus hábitos de navegación. Si continua navegando, consideramos que acepta su uso. Puede cambiar la configuración u obtener más información aquí. To improve our services and products, we use "cookies" (own or third parties authorized) to show advertising related to client preferences through the analyses of navigation customer behavior. Continuing navigation will be considered as acceptance of this use. You can change the settings or obtain more information by clicking here. Utilizamos cookies próprios e de terceiros para melhorar nossos serviços e mostrar publicidade relacionada às suas preferências, analisando seus hábitos de navegação. Se continuar a navegar, consideramos que aceita o seu uso. Você pode alterar a configuração ou obter mais informações aqui.