Chromium in the sixth oxidation state may easily penetrate cellular membranes via non-specific sulfate transporters due to its tetrahedral symmetry (high similarity to SO4(2-) and HPO4(2-)). This feature makes chromium a toxic and hazardous pollutant responsible for the deterioration of midland water quality. The aim of the study was to evaluate the capacity of two yeast species - Saccharomyces...

The quantum yields of singlet oxygen ((1)O(2)) production (Phi(Delta)) and (1)O(2) lifetimes (tau(Delta)) at the gas-solid interface in silica gel material are determined. Different photosensitizers (PS) are encapsulated in parallelepipedic xerogel monoliths (PS-SG). PS were chosen according to their known photooxidation properties: 9,10-dicyanoanthracene (DCA), 9,10-anthraquinone (ANT), and a ...

BACKGROUND Cutting edge technologies based on Advanced Oxidation Processes (AOP) are under development for the elimination of highly persistent organic molecules (like pesticides) from water matrices. Among them, ionizing radiation treatment represents a promising technology that requires no additives and can be easily adapted to an industrial scale. In these processes several reactive species ...

Gas-phase autoxidation-regenerative peroxy radical formation following intramolecular hydrogen shifts-is known to be important in the combustion of organic materials. The relevance of this chemistry in the oxidation of organics in the atmosphere has received less attention due, in part, to the lack of kinetic data at relevant temperatures. Here, we combine computational and experimental approac...

The chemical decomposition of p-hydroxyphenylacetic acid, a priority phenolic pollutant present in wastewaters from some agro-industrial plants, is studied by means of a single photochemical process produced by a polychromatic UV radiation and by hydroxyl radicals generated by the combination of UV radiation plus hydrogen peroxide and by the Fenton's reagent (hydrogen peroxide plus ferrous salt...

Bismuth vanadate (BiVO4 or BVO) is one of the most studied photocatalysts for water oxidation because its excellent visible light absorption and appropriate band energy positions. However, BVO presents a low charge mobility high electron–hole recombination rate. To address these fundamental limitations, this study proposes coating previously synthesized phase-pure monoclinic scheelite with diff...

In this study, 3-hydroxyethoxyphenyl-9(10), 16(17), 23 (24)-decyloxy-zinc phthalocyanine (HDPcZn) was first prepared by liquid phase catalysis, and then it esterified with Poly-(N-isopropylacrylamide) which have two carboxyl groups (TRIT-PNIPAM) at the end to obtain a linear thermoresponsive polymer (PcZn-PNIPAM-PcZn) phthalocyanines end. The characterized FT-IR, 1 H NMR, EDS UV-vis, photocatal...

Ozone assisted combustion is a promising method to control combustion, ignition and pollutant formation. In this study, we investigated the ozone behaviours in fuel-NOx through reactive force field (ReaxFF) molecular dynamics (MD) simulations of pyridine (a main nitrogen-containing compound coal) oxidation under different concentrations. The results show that enhances process facilitates conver...

Ozone is a crucial air pollutant that damages human health and vegetation. As it formed by the sunlit oxidation of nitrogen oxides volatile organic compounds, current ozone mitigation strategies are primarily focused on summer. By analysing pollution episodes in eastern China, observed daily total oxidants accumulation cool seasons (spring autumn: 60 ppb winter 40 ppb) comparable to measured su...