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In this paper we used Na2CO3-impregnated silica as reactive substrate for the determination of atmospheric NOx (NO+NO2) by using a passive sampling device, with radial symmetry, which is unprecedented. We conducted laboratory and field tests at an urban setting, with co-located passive samplers and continuous measurements of NOx by a chemiluminescence detector, used as reference. The performance of...
In this paper we used hydrated mayenite as reactive substrate for NOx active sampling in the air, which is novel. The performance of the mayenite-based sorbent for the NOx tubes was evaluated in two different monitoring surveys (autumn 2015 and winter 2016), characterized by different environmental conditions. Sorbent tubes filled with mayenite were exposed simultaneously to triethanolamine (TEA)-based...
The 13C/12C carbon isotope ratio is a chemical parameter with many important applications in several scientific area and the technique of choice currently used for the δ13C determination is the isotope ratio mass spectrometry (IRMS). This latter is highly accurate (0.1‰) and sensitive (up to 0.01‰), but at the same time expensive and complex. The objective of this work was to assess the reliability...
The present work deals with the catalytic hydrogenolysis of glycidol to 1,2-propanediol. Reactions were carried out in a closed steel reactor using noble metal based heterogeneous catalysts (Pd, Rh, Pt) under hydrogen pressure (1–8bars) in the temperature range of 25–140°C. Pd/C shows the highest glycidol conversion (96%) under solvent free conditions after 24h with high selectivity to 1,2-propanediol...
Sodium dichloroisocyanurate (NaDCC) is usually employed as a disinfectant for the treatment of water, environmental surfaces and medical equipment principally for its effectiveness as a microbicide agent. In this study, we explore the possibility of a new use for NaDCC by investigating the microbicidal activity of chlorine, which derives from the hydrolysis of NaDCC mediated by air humidity, and by...
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