26 documents found, page 1 of 3
Adsorption of Bisphenol A by granular activated carbon prepared with different ...
Mourão, P.A.M.; Cassavela, C.; Cansado, I.P.P.; Castanheiro, J.E.F.; Ribeiro, L.; Pagnanelli, F.Nowadays, the emerging pollutants, such as bisphenol A, are object of increased attention by the citizens and the sectors of industry and academia, as a result of the problems they cause, particularly at the health level. In this study, a set of granulated samples was prepared from a commercial powdered activated carbon, aiming its application in the removal of bisphenol A via the adsorption process. The granul...
Utilization of Biomass Waste at Water Treatment
Cansado, I.P.P.; Geraldo, F.; Mourão, P.A.M.; Castanheiro, J.E.F.; Carreiro, E.P.; Suhas, SuhasThis work presents some preliminary results on the direct use of untreated biomass from agricultural activities as adsorbents for water treatment. Waste was also used to produce activated carbons (ACs) by chemical activation with KOH. The efficacy of agricultural waste such as stubble, sawdust from Teak (Tectona Grandis), fibers from Imbondeiro (Adansonia digitata L.), bamboo flowers, and other regional plants ...
An ingenious investigation on the adsorptive and antibacterial properties of a ...
Suhas, Suhas; Chaudhary, M.; Chaudhary, S.; Sing, M.; Dehghani, M.H.; Tyagi, I.; Cansado, I.P.P.; Kumar, S.; Kumar, S.A novel silver-doped hydrochar (Ag-HC-230) was synthesized at 230 °C via hydrothermal carbonization of Tectona grandis seeds (TGs). The characteristic properties of the Ag-HC-230 were investigated using FTIR, XRD, TGA, SEM and surface area measurements. These results were further utilized for exploring the removal efficiency of the prepared material for chemical and biological contaminants. The surface area and...
Numerical Analysis of the Porous Structure of Activated Carbons Derived from Sy...
Kwiatkowski, M.; Cansado, I.P.P.; Mourão, P.A.M.This paper presents original results from the unique analysis of the porous structure of activated carbons (ACs) produced through the chemical activation of polyethylene terephthalate (PET) and polyacrylonitrile (PAN), as well as from a physical mixture of both polymers. An advanced method of adsorbent surface analysis—more specifically, the new method of numerical clustering-based adsorption analysis regarding...
Effect of Substituent Groups on the Adsorption Efficiency of Phenols by Activat...
Suhas, Suhas; Kushwaha, S.; Chaudhary, M.; Chaudhary, S.; Tyagi, V.; Cansado, I.P.P.; Dehghani, M.H.In this study, the novel activated carbon developed from Phyllanthus emblica fruit stone, through hydrothermal treatment at low pressure and temperature, was utilized for the removal of 4-nitrophenol, 4-chlorophenol, and phenol from water. The activated carbon produced (AC-HTPEFS) showed a well-developed porosity with a surface area of 569 m2 g−1 and a total pore volume of 0.342 cm3 g−1. The adsorption process ...
Biorrefinarias: uma solução para o futuro?
Castanheiro, J.E.F.; Mourão, P.A.M.; Cansado, I.P.P.Uma biorrefinaria é uma instalação (ou um conjunto de instalações) que integra processos e equipamentos de conversão de biomassa para produzir biocombustíveis para os transportes, energia e produtos químicos. O conceito de biorrefinarias é análogo ao conceito da refinaria do petróleo, que produz vários combustíveis e produtos derivados do petróleo. As biorrefinarias permitem a produção integrada de biocombustív...
Valorização de biorresíduos numa perspetiva da economia circular
Cansado, I.P.P.; Mourão, P.A.M.; Castanheiro, J.E.F.A qualidade de vida a que a nossa sociedade se habituou, assenta num consumismo excessivo que culmina com uma produção gigant de resíduos. Os desperdícios, que há uns anos atrás eram identificados como resíduos e por isso eram enviados para as lixeiras ou aterros sem qualquer tipo de retorno económico, hoje em dia são identificados como sub produtos e reconhecidos como possíveis matérias primas para utilização ...
Biorrefinarias - conversão de resíduos da biomassa em materiais adsorventes
Mourão, P.A.M.; Castanheiro, J.E.F.; Cansado, I.P.P.A biomassa por definição é toda a matéria orgânica, quer seja de origem vegetal ou animal, que pode ser utilizada como fonte de energia [1]. No entanto, cada vez mais, a biomassa é vista como uma fonte de oportunidades para outros fins, que vão muito para lá da sua conversão em energia e, muito em particular, cada vez mais os subprodutos deste processo despertam o interesse do sector académico, tecnológico e in...
Granulation and activation of an arsenic adsorbent made of iron oxide doped hyd...
Mourão, P. A.M.; Di Caprio, F.; Cansado, I.P.P.; Castanheiro, J.E.; Falcone, I.; Astolfi, M.L.; Pagnanelli, F.Water contamination by arsenic (As) takes place over extended geographic areas and it represents an environmental issue of global concern due to the severe threats to human health. One main limitation in applying As treatment systems is the high cost of conventional adsorbents (5-10 € kg-1, granular ferric oxides, GFO). In recent studies, hydrothermal carbonization (HTC) was proved to be a promising process to ...
Valorisation of glycerol with cinnamaldehyde over phosphotungstic acid encapsul...
Castanheiro, J.E.; Mourão, P.A.M.; Cansado, I.P.P.; Vital, J.; Fonseca, I.M.; Ramos, A.M.Glycerol was reacted with cinnamaldehyde over phosphotungstic acid (PW) encapsulated on NaY at 100°C. Catalysts containing different PW contents were prepared. The activity increased with an increasing amount of PW encapsulated on NaY, and the use of the NaY-PW4 (0.121 gpw/gNaY) material resulted in a superior conversion compared to those obtained using the other materials. After 5 h, the conversion of glycerol...