18 documents found, page 1 of 2
Editorial - 6th international congress on water, waste and energy management (W...
Dominguez, Joaquin R.; Nunez-Delgado, Avelino; Gomes, Helder; Augusto, Paulo A.; Varjani, Sunita; García, Juan; Hodaifa, GassanThese were the sixth, fifth, and second editions of a series of biannual academic conferences aimed at creating an international forum for researchers and scientists worldwide to discuss new results regarding the soundest issues related to Water, Waste, Green Chemistry, Green Energy, and Environmental Technologies. Over 330 communications from 27 countries attended these conferences, including 181 posters, 150 ...
New insights on the removal of diclofenac and ibuprofen by CWPO using a magneti...
Huaccallo-Aguilar, Y.; Díaz de Tuesta, Jose Luis; Álvarez-Torrellas, Silvia; Gomes, Helder; Larriba, Marcos; Ovejero, Gabriel; García, JuanThis research has been focused on the removal of two anti-inflammatory drugs, diclofenac (DCF) and ibuprofen (IBU), by a continuous catalytic wet peroxide oxidation (CWPO) process using a lab-synthesized nanomagnetic catalyst (Fe3O4/MWCNTs). The central composite rotatable design (CCRD) method was used to study the effect of DCF and IBU concentration (expressed as theoretical oxygen demand (ThOD) between 0 and ...
Exploring the activity of chemical-activated carbons synthesized from peach sto...
Martin-Martinez, Maria; Álvarez-Torrellas, Silvia; García, Juan; Silva, Adrián; Faria, Joaquim; Gomes, HelderPeach stones were used as raw material for the synthesis of activated carbons with different properties. Firstly, peach stones were chemically activated using a 12M H3PO4 solution and carbonized under flowing air (400 °C). The obtained activated carbon, named as PS, is characterized by a high surface development (SBET=1262m2 g−1) and acidic character (pHPZC=4.2). A fraction of PS was further carbonized under N2...
Enhancement of p-nitrophenol adsorption capacity throughN2-thermal-based treatm...
Álvarez-Torrellas, Silvia; Martin-Martinez, Maria; Gomes, Helder; Ovejero, Gabriel; García, JuanIn this work several activated carbons showing different textural and chemical properties were obtained by chemical and physical activation methods, using a lignocellulosic material (peach stones) as precursor. The activated carbon resulting from the chemical activation, namely as CAC, revealed the best textural properties (S BET = 1521 m 2 g −1 , pore volume = 0.90 cm 3 g −1 ) and an acidic character. It was f...
Catalytic wet peroxide oxidation in the removal of emerging micropollutants
Gomes, Helder; Ribeiro, Rui; García, Juan; Frontistis, Zacharias; Mantzavinos, Dionissios; Silva, Adrián; Faria, JoaquimSeveral contaminants of emerging concern (CECs), with negative impact on water security, have been recently identified and quantified in different water sources [1]. Among them, antibiotics are receiving particular attention due to the possible development of antibiotic resistant bacteria and/or resistance genes (ARB&ARG). Conventional urban wastewater treatment plants are unable to cope with most of these comp...
Removal of antibiotic compounds by adsorption using glycerol-based carbon mater...
Álvarez-Torrellas, Silvia; Ribeiro, Rui; Gomes, Helder; Ovejero, Gabriel; Rodríguez, A.; García, JuanIn the recent past few years, antibiotics have raised a significant concern from the research community, due mainly to the antibiotic resistance generated by metabolites and the continuous release of these drugs to the environment. Adsorption, since it is a non-destructive tertiary technology, has been revealed as one of the most advantageous technique in wastewater treatment processes. Commercial activated car...
Removal of antibiotic compounds by adsorption using glycerol-based carbon mater...
Álvarez-Torrellas, Silvia; Ribeiro, Rui; Gomes, Helder; Ovejero, Gabriel; García, JuanThis study is focused on the synthesis and application of glycerol-based carbon materials (GBCM200, GBCM300 and GBCM350) as adsorbents for the removal of the antibiotic compounds flumequine and tetracycline from aqueous solution. The synthesis enrolled the partial carbonization of a glycerol-sulfuric acid mixture, followed by thermal treatments under inert conditions and further thermal activation under oxidati...
Synthesis of glycerol-based carbon materials as environmental application
Álvarez-Torrellas, Silvia; Ribeiro, Rui; Gomes, Helder; Rodriguez, A.; García, JuanCrude glycerol, obtained from the biodiesel production, is actually an abundant and low-cost feedstock, making the preparation of carbonaceous materials by partial carbonization and sulfonation of this by-product an interesting research focus. Bearing this in mind, the aim of this study is to explore several types of glycerol-based carbon materials synthesized by partial carbonization of glycerol in concentrate...
Synthesis of carbon xerogels and their application in adsorption studies of caf...
Álvarez, Silvia; Ribeiro, Rui; Gomes, Helder; Sotelo, José; García, JuanThis work involves the application of carbon xerogels in the removal of two emerging contaminants, caffeine and diclofenac, from aqueous solutions. Textural characterization of the carbon xerogels prepared by polycondensation of resorcinol with formaldehyde (witha molar ratio of 1:2) has been investigated using N2 adsorption–desorption at −196◦C. Chemical surface groups were analyzed by FTIR spectroscopy, eleme...
Eliminación de contaminantes emergentes mediante adsorción empleando xerogeles ...
Álvarez, Silvia; Ribeiro, Rui; Gomes, Helder; Sotelo, José; García, JuanEn la actualidad el número de sustancias quimicas potencialmente peligrosas que pueden lIegar a alcanzar el medio ambiente es muy amplio, por lo que la atención en la investigación de la contaminación dei agua se ha extendido recientemente a lo que se denomina contaminación emergente; es decir, la contaminación causada por sustancias químicas de origen y propiedades muy diversas, en concentraciones muy bajas, y...