81 documents found, page 1 of 9
Effect of trace metal bioavailability on the anaerobic digestion of purified te...
Pinheiro, Aline Martins; Tavares, T.; Alves, M. M.; Duarte, Maria Salomé LiraThe production of purified terephthalic acid (PTA), a precursor for the plastic industry, employs metalscobalt (Co) and manganese (Mn)as catalysts, generating wastewater (PTA WW) that contains metals and organic compounds. Co and Mn are essential to microbial necessities during anaerobic digestion (AD), but they can potentially inhibit this process when present in high concentrations. This study investigated th...
Immobilization of laccase on grape seed-derived hydrochar and biochar as sustai...
Sá, Helena Isabel Oliveira; Michelin, Michele; Tavares, T.; Sanroman, Maria Angeles; Rosales, Emilio; Neves, Isabel C.Pharmaceutical active compounds pose a serious global threat due to their continuous release into aquatic systems. This study explores an innovative approach for the degradation of acetaminophen (APAP), sulfamethoxazole (SMX) and tetracycline (TC) by the covalent immobilization of crude laccase from Lentinus sajor-caju on grape seed-derived biochar (GS-BC-Lac) and hydrochar (GS-HC-Lac). Characterization through...
Entrapment of laccase-halloysite nanotubes in chitosan beads for pharmaceutical...
Sá, Helena Isabel Oliveira; Silva, Bruna Andreia Nogueira Airosa; Tavares, T.; Michelin, MicheleThe presence of pharmaceuticals in water has emerged as a significant environmental concern. This study investigated the degradation of sulfamethoxazole (SMX), tetracycline (TC) and acetaminophen (APAP) using laccase from Lentinus sajor-caju immobilized by adsorption on halloysite nanotubes (HNT) and subsequent entrapment in chitosan (CS) beads. The immobilization process was successfully confirmed through Tran...
Sustainable permeable biobarriers for atrazine removal in packed bed biofilm re...
Lago, Ana Elisa Marques; Silva, Bruna Andreia Nogueira Airosa; Tavares, T.The synergy between two supported bacterial biofilms of S. equisimilis and P. putida and a sustainable biocarrier (raw pine) was studied, working both as biobarriers for the treatment of water contaminated with atrazine. Firstly, the effects of ATZ exposure on bacterial growth were evaluated, with Gram-positive S. equisimilis being a more tolerant bacterium to higher amounts of the herbicide. The bioremoval of ...
Evaluation of microbial biosorbents for efficient Cd(ii) removal from aqueous s...
Rosca, Mihaela; Diaconu, Mariana; Hlihor, , Raluca-Maria; Cozma, Petronela; Silva, Bruna Andreia Nogueira Airosa; Tavares, T.; Gavrilescu, MariaThe biosorption of heavy metals has become an attractive alternative to conventional methods and is considered feasible, environmentally friendly and often low-cost option. Five microorganisms (Rhodotorula sp., Cladosporium sp., Bacillus megaterium, Trichosporon sp. and Geotrichum sp.) were isolated from different environments and used for the biosorption of Cd(II) from aqueous solutions in batch mode to expand...
Biowaste valorization on pharmaceuticals and pesticides abatement in aqueous en...
Lago, Ana Elisa Marques; Silva, Bruna Andreia Nogueira Airosa; Tavares, T.This study focuses on the abatement of pharmaceuticals and pesticides in water using sustainable biosorbents. Adsorption kinetics and equilibrium measurements were performed to characterize the adsorption of fluoxetine hydrochloride (FLX), carbamazepine (CRB) and atrazine (ATZ) by raw pine bark. The amount of adsorbed pollutants by mass of adsorbent followed the order: FLX (0.652 mg/g) > ATZ (0.522 mg/g) > CRB ...
Chemical modification of zeolites for the recovery of rare earth elements evalu...
Barros, Óscar José Maciel; Parpot, Pier; Neves, Isabel C.; Tavares, T.Rare earth elements (REE) are a significant group of valuable elements used in diverse and relevant applications in our daily lives. The mining and processing of the original ores, as well as the final wastes disposal, produce wastewater with variable concentrations of REE to be recovered. Sorbent materials like zeolites have been employed in adsorption processes to capture diverse pollutants from wastewater. T...
Recycling of natural and waste materials as supports for green silver nanoparti...
Rocha, Verónica Patrícia Moreira; Franco, Sandra; Bertão, Ana Raquel; Neves, Isabel C.; Tavares, T.The use of a sustainable technology to synthesize green silver nanoparticles (AgNP) from renewable resources is very appealing. Here, a green protocol for the production AgNP/composites is introduced, via in situ reduction of Ag+ ions on sustainable materials (clays and waste materials) using eucalyptus leaves extract (ELE) as a reducing and stabilizing agent, without the addition of any harmful or expensive or...
Machine learning approach for classification of REE/Fe-zeolite catalysts for fe...
Barros, Óscar José Maciel; Parpot, Pier; Rombi, Elisabetta; Tavares, T.; Neves, Isabel C.Various heterogeneous catalysts based on rare earth elements (REE) and iron supported on zeolites were selected and analyzed using machine learning approaches. REE were used in the preparation of multiple REE/Fe-zeolite catalysts with lanthanum, praseodymium or cerium obtained by ion exchange or impregnation methods, using FAU or MFI structures as supports. The efficiency of these REE/Fe-zeolite catalysts was e...
Immobilization of biogenic metal nanoparticles on sustainable materials - green...
Rocha, Verónica Patrícia Moreira; Lago, Ana; Silva, Bruna Andreia Nogueira Airosa; Barros, Óscar José Maciel; Neves, Isabel C.; Tavares, T.The application of the principles of green chemistry to the synthesis of metal nanoparticles (MNP) is a new emerging issue concerning sustainability. Together with the green nanotechnology, this is an evolving approach with innovative, reliable and sustainable solutions for applications in all fields of life. Those principles may be used on greener bio-inspired materials applied for the synthesis of MNP as well...