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The influence of the activated carbon post-treatment on the phenolic
Cansado, Isabel P. P.; Mourão, Paulo A. M.; Falcão, Ana I.; Ribeiro Carrott, M . Manuela L.; Carrott, Peter J. M.The aim of this research was to investigate how post treatment modification, such as those with sodium hydroxide or urea, can influence the capacity of activated carbon (AC) for phenolic compounds removal from liquid media. The ACs modification was performed using urea impregnation followed by pyrolysis at high temperature. With all ACs used, this treatment induced a pore volume increase, a mean pore size broad...
On the use of ethanol for evaluating microporosity of activated carbons prepare...
Carrott, Peter J. M.; Cansado, Isabel P. P.; Mourão, Paulo A. M.; Ribeiro Carrott, M. Manuela; Louro, Nélio D. B.; Albiniak, A.; Broniek, E.Microporous activated carbons prepared by KOH chemical activation or steam activation from lignite were characterised by adsorption of N2 at 77 K and CO2 at 298 K. Subsequently, the adsorption of ethanol was carried out and complemented by adsorption of benzene and cyclohexane. The isotherm analysis included application of the αs method using ethanol reference data obtained here by also studying non-porous carb...
Direct Nitrogen Enrichment of Activated Carbon Produced from Synthetic or Natur...
Cansado, Isabel P. P.; Mourão, Paulo A. M.; Carrott, Peter J. M.; Carrott, Manuela L. R.The specific application of activated carbons (AC) as adsorbents for gases and vapours depends on the properties of pollutants to be removed, but the performance of the AC depends on various properties. If their porosity is the main parameter in gas adsorption, the chemical nature of their surface plays a significant role in liquid phase interactions and in their usefulness as catalyst support materials. Of par...
Sulfated fucan from marine alga inhibits HeLa cells infection by HTLV-1 free pa...
Romanos,Maria T. V.; Andrada-Serpa,Maria J.; Mourão,Paulo A. S.; Yoneshigue-Valentin,Yocie; Pereira,Mariana S.; Santos,Norma; Wigg,Marcia D.A sulfated fucan from Laminaria abyssalis marine alga prevented the interaction of HTLV-1 particles, purified from the MT-2 cell line, with HeLa cells. The infection obtained using a concentrated virus suspension was detected only by amplification of the newly synthesized HTLV-1 proviral cDNA by the nested-polymerase chain reaction (PCR). The sulfated polysaccharide was not toxic to the cells at a concentration...
An antithrombin-dependent sulfated polysaccharide isolated from the green alga ...
Rodrigues,José Ariévilo Gurgel; Queiroz,Ismael Nilo Lino de; Quinderé,Ana Luíza Gomes; Vairo,Bruno Cunha; Mourão,Paulo Antônio de SouzaRed algae sulfated polysaccharides (SPs) have been widely described as anticoagulant and antithrombotic agents; however no description of antithrombotic activity regarding green algae SPs has been reported. Caulerpa cupressoides (Chlorophyta) has three different SPs fractions (SP1, SP2 and SP3). We investigated the effects of SP2 on thrombin activity by antithrombin and in an experimental model of venous thromb...
Tempo decorrido desde a última consulta: análise de um modelo estatístico aplic...
Mourão,Paulo ReisOBJETIVO: Os objetivos deste artigo são dois: I) Desenvolver um modelo que caracterize a distribuição da variável "tempo decorrido desde a última consulta médica" e II) testar empiricamente esse modelo. MÉTODOS: Para desenvolver o modelo teórico, recorrerá a uma demonstração de natureza estatística. Para testar o modelo teórico serão usados os dados da "Encuesta Nacional de Espana" de 2006, referentes ao gênero...
Activated Carbon Post Treatment - Influence on Phenolic Compounds Removal
Cansado, Isabel P. P.; Mourão, Paulo A. M.; Falcão, Ana I.; Ribeiro Carrott, M. Manuela; Carrott, Peter J. M.● AC preparation from different precursors and their modification / optimisation with sodium hydroxide and urea to improve the adsorption capacities for phenolic compounds from the liquid phase. ● Comparative study of the influence of textural and chemical parameters of AC on the liquid phase adsorption.
Application of Activated Carbons Modified with NaOH at High Temperature for Phe...
Cansado, Isabel P. P.; Mourão, Paulo A. M.; Falcão, Ana I.; Ribeiro Carrott, M. Manuela; Carrott, Peter J. P.AC preparation from different precursors and their modification / optimisation with sodium hydroxide to improve the adsorption capacities for phenolic compounds from the liquid phase. ● Comparative study of the influence of textural and chemical parameters of AC on the liquid phase adsorption.
Modification and Optimization of Activated Carbons for Phenolic Compounds Removal
Cansado, Isabel P. P.; Mourão, Paulo A. M.; Ribeiro Carrott, M. Manuela; Carrott, Peter J. M.Phenols are generally considered to be one of the important organic pollutants discharged into the environment causing unpleasant taste and odour of drinking water. Development of inexpensive adsorbents from industrial wastes for the treatment of wastewaters is an important area in environmental sciences. For the phenolic compounds removal, it appears that the pH of the solution, the real surface area of the so...
Modification and Optimization of Activated Carbons for Phenolic
Cansado, Isabel P. P.; Mourão, Paulo A. M.; Falcão, Ana I.; Ribeiro Carrott, M. Manuela; Carrott, Peter J. M.Phenolic compounds are generally considered to be one of the important organic pollutants discharged into the environment causing unpleasant taste and odour of drinking water [1,2]. So, removal of phenolics compounds from industrial effluents is required before sewage disposal. The development of inexpensive adsorbents from industrial wastes for the treatment of wastewaters is an important area in environmental...
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