@Article{MarquesMarBalMesCar:2017:RoMoCy,
author = "Marques, Susana C. R. and Marcuzzo, Jossano Saldanha and Baldan,
Maur{\'{\i}}cio Ribeiro and Mestre, Ana S. and Carvalho, Ana
P.",
affiliation = "{Universidade de Lisboa} and {Instituto Nacional de Pesquisas
Espaciais (INPE)} and {Instituto Nacional de Pesquisas Espaciais
(INPE)} and {Universidade de Lisboa} and {Universidade de
Lisboa}",
title = "Pharmaceuticals removal by activated carbons: Role of morphology
on cyclic thermal regeneration",
journal = "Chemical Engineering Journal",
year = "2017",
volume = "321",
pages = "233--244",
month = "Aug.",
keywords = "Activated carbon, Adsorption from solution, Clofibric acid,
Morphology, Paracetamol, Thermal regeneration.",
abstract = "This work aims to evaluate the performance of activated carbons as
reusable adsorbents of pharmaceutical compounds. To achieve this
objective, the behaviour of carbons with different morphologies
(powdered, granular and cloth) in the adsorption of paracetamol
and clofibric acid from aqueous solution was studied; as well as
the thermal regeneration of paracetamol saturated activated
carbons at 400 and 600 °C. For that, the properties of the carbon
materials were characterized by N2 and CO2 adsorption, pHPZC, XPS,
TG, XRD and SEM. Kinetic results showed the importance of
supermicropore volume for the diffusion of the probe molecules
towards the adsorption active sites, and the negative effect of
granular form which led to significantly lower adsorption rates.
Paracetamol adsorption followed a Langmuir mechanism in almost all
cases, whereas clofibric acid adsorption generally occurred
through a more complex mechanism. This behaviour was explained
considering the nature of the clofibric acid species present in
solution. This compound was always the most adsorbed molecule,
reaching a maximum adsorption capacity of \∼500 mg
dm\−3 in the case of carbon cloth. Thermal regeneration
proved to be an efficient methodology to recover the porosity of
the granular and cloth paracetamol exhausted activated carbons.
After the second regeneration treatment at 400 °C both activated
carbons retained around 57% of their initial paracetamol uptake.
The conjugation of the adsorption and regeneration results pointed
out the benefits of the carbon cloth (in felt form) morphology
which, being an easy handling sample, gathered the performance of
the best powdered sample assayed in adsorption experiments, with
the behaviour of granular carbon upon regeneration.",
doi = "10.1016/j.cej.2017.03.101",
url = "http://dx.doi.org/10.1016/j.cej.2017.03.101",
issn = "1385-8947",
language = "en",
targetfile = "marques_phama.pdf",
urlaccessdate = "28 abr. 2024"
}