Water pollution is the most serious problem threatening global water resources. The release of both natural and anthropogenic factors in aquatic environment affecting quality bodies, with Contaminants Emerging Concern (CECs) being one major issues. In recent years, availability robust sensitive analytical methods has allowed detection identification a wide variety pollutants. Pharmaceutically Active Compounds (PhACs) represent large category CECs detected environment, posing threats to human...

This work reports a novel management strategy for hazardous waste derived from the alumina industry, known as bauxite residue or red mud (RM). Herein, and first time, RM-containing porous structures were prepared by direct ink writing (DIW) then used directly to extract methylene blue (MB) synthetic wastewater. The lattices using 50:50 wt% blend between RM metakaolin (MK). incorporation of was evaluated comparing with MK-based printed structure. Despite high amount, showed compressive...

Heterogeneous photo-Fenton reaction with iron-based magnetic materials has been proposed as an alternative to the homogeneous Fenton process remove contaminants of emerging concern (CECs) because low cost, facile recovery and reuse. The material is not only a reservoir maintain effective concentration iron in solution, but it also activates H2O2 at surface. Magnetic particles (MPs) coated different amount humic acid (HA), prepared by co-precipitation method under anoxic oxygenated conditions...

Antifungal azoles are the most frequently used fungicides worldwide and occur as active ingredients in many antifungal pharmaceuticals, biocides, pesticides. Azole frequent environmental contaminants can affect quality of surface waters, groundwater, drinking water. This study examined potential combined vacuum UV (185 nm) UVC (254 irradiation (VUV/UVC) azole fungicide tebuconazole transformation product 1,2,4-trizole on degradation changes ecotoxicity. In vivo ecotoxicity was before after...

The mining industry is one of the largest sources environmental concern globally. Herein we report for first time application highly porous 3D-printed sorbents containing high amounts (50 wt%) red mud, a hazardous waste derived from alumina industry, remediation acid mine drainage (AMD). sorption capacity inorganic polymers was initially evaluated simultaneous removal five metal(loid) elements, namely Cu(II), Ni(II), Zn(II), Cd(II) and As(V) in synthetic wastewater. effect initial...

Acid mine drainage (AMD) poses a significant threat to water quality worldwide, being amongst the most problematic environmental concerns of millennium. This work reports for first time remediation real AMD, from Portuguese abandoned mine, in fixed bed column using porous red mud/fly ash-based geopolymeric spheres. Porous waste-based spheres (2.6 ± 0.2 mm) were obtained by suspension-solidification method through addition optimum foaming agent dosage. The sorbent capacity removing cations...

The photo-Fenton process is effective for pathogen removal, and its low-cost versions can be applied in resource-poor contexts. Herein, a photo-Fenton-like system was proposed using low concentrations of iron oxides (hematite magnetite) persulfates (peroxymonosulfate - PMS, peroxydisulfate PDS), which exhibited excellent inactivation performance towards MS2 bacteriophages. In the presence bacteria, inhibited H

The effect of cobalt doping on semiconductors materials synthesized via solution and hydrothermal methods was investigated by testing its photocatalytic efficiency pollutants abatement. X Ray Diffraction technique used to evaluate samples crystallographic phases allowing identify different species due the introduction dopants. Diffuse Reflectance UV–vis Spectroscopy employed determine bandgap as well absorption corresponding d-d transitions for doped systems. Finally, Electron Paramagnetic...

This paper describes an environmentally sustainable synthetic method for the preparation of a set meso-aryl hydroporphyrins, namely chlorins and bacteriochlorins, via reduction porphyrins with diimide, in total absence solvents bases. Thermomicroscopy studies clearly showed that process is typical solvent-free reaction.

In this paper we compare the photocatalytic activity of two semiconductors based on ZnO: ZnO/CeO2 and ZnO/Yb2O3. The samples were prepared via hydrothermal synthesis fully characterized by X-ray diffraction technique, diffuse reflectance Ultra Violet- Visible spectroscopy (UV-Vis), high resolution transmission electron microscopy finally with paramagnetic resonance spectroscopy. materials also tested in their performances both through Electron Paramagnetic Resonance (EPR) analyzing formation...

Azole fungicides are frequently detected as water contaminants due to extensive societal use, and these broad-spectrum antifungal chemicals can cause harmful effects in non-target organisms. Vacuum ultraviolet (VUV) treatment is an efficient green technology that produces hydroxyl radical remove from water. This study investigated the potential of UVC (254 nm) combined VUV/UVC (185/254 widely used compound clotrimazole Degradation kinetics, degradation mechanisms, toxicity mitigation were...

The intrinsic challenge of large molecules to cross the cell membrane and reach intracellular targets is a major obstacle for development new medicines. We report how rotation along single C–C bond, between atropisomers drug in clinical trials, improves uptake therapeutic efficacy. redaporfin (a fluorinated sulfonamide bacteriochlorin photosensitizer 1135 Da) are separable display orders magnitude differences photodynamic efficacy that directly related their differential cellular uptake....

In this work, and for the first time, production of waste-based magnetic geopolymer spheres by a simple heat treatment under reductive atmosphere is reported. Upon treatment, iron oxide present in bauxite wastes (red mud), used as solid precursor, reduced to magnetite, thus producing without need addition any secondary materials. The magnetisation these mm-size materials reached 5.34 A m2 kg-1, suggesting they contain up 6 wt% magnetite. This was demonstrated be sufficient their...

This study aims to investigate how the photocatalytic efficiency of zinc oxide can be improved by introducing doping species into its crystal lattice. New materials based on doped with iron, have been synthesized using different methods, characterized and tested toward abatement selected organic molecules. The synthetic strategies followed comprised sol-gel, precipitation hydrothermal processes, in order identify which one is capable guaranteeing best performances. photoactivity new...

Magnetic particles (MPs) coated with humic acid (HA) prepared under anoxic atmosphere were tested as heterogeneous photo-Fenton catalyst for the activation of hydrogen peroxide (H2O2) and persulfate (S2O82−) using Bisphenol A (BPA) a model pollutant. The role HA coating, pH value H2O2/S2O82− concentration investigated. positive contribution coating on H2O2 S2O82− was found. highest BPA degradation rates achieved at acidic conditions (pH 3) both S2O82−, however showed significant efficiency...

The synthesis of one-step meso-porphyrins type A x B y containing alkyl and pyridyl groups is described. An initial assess the amphiphilic proprieties were determined by its log K ow using fluorescence detection techniques values from 1.42 to 2.15 observed. melting points this set porphyrins was a strong effect number size meso-alkyl chain ascribed.

This study investigates the capability of modified zinc oxides (ZnO) with Ce, Yb and Fe towards simultaneous inactivation pathogenic bacteria (Escherichia coli, Enterococcus faecalis Pseudomonas aeruginosa) Contaminants Emerging Concern (CECs, Diclofenac, Sulfamethoxazole Trimethoprim) under natural sunlight. Several catalyst loads (from 0 to 500 mg/L) were assessed as proof-of principle in isotonic solution followed by evaluation organic matter effect simulated actual urban wastewater...