The highly toxic, inflammable, and odorless nature of CO causes problematic handling on laboratory-scale experiments. Replacement cylinders by surrogates is particularly attractive, especially in the case multicomponent reactions leading to valuable fluorinated products. We report a Pd-catalyzed three-component protocol for direct synthesis perfluoroalkyl-substituted α,β-unsaturated esters from...

1 Overview 2 Introduction 3 Background to MuSR 3.1 Muonium as a radiolabel 4 The magnetic muon 4.1 Transverse-field muon spin rotation spectroscopy (TF-MuSR) 4.2 Avoided level crossing (ALC-MuSR) spectroscopy 4.3 Longitudinal-field muon spin relaxation measurements (LF-MuSRx) 5 Structural studies of radicals 5.1 Substituent effects 5.2 Cyclic systems 5.3 Acetylenes, allenes and butadienes 5.4 C...

In this laboratory scale study, impregnated almond shell activated carbon was used as adsorbent to investigate its feasibility for nitrate adsorption from aqueous medium. The effects of activated carbon dosage and contact time have been examined in batch experiments. Experimental data show that impregnated activated carbons by Fe0, Fe2 (SO4)3, and FeSO4 were more effective than virgin almond ac...

This paper presents the results of an investigation on the effects of concentration of cations on activated sludge properties and membrane fouling in submerge membrane bioreactors. The working volume of the experimental setup was two liters. The cellulose acetate membrane was immersed in the bioreactor. The flocculability, settling properties and fouling propensity of activated sludge was measu...

abstract aims: even low concentrations of phenol in industrial waste can cause many difficulties for the aquatic environment. so removal of this organic matter is an important issue. the adsorption process, is one of the most effective methods for isolation and purification of phenols. the aim of this study was to introduce wood haloxylon as a natural and new absorbent to remove phenol from aqu...

in the paper we developed a new method to determine the absolute amount of adsorption. this method relies on the excess adsorption isotherm and the density profile in the pore of one material. to compute the density profile and decrease complex calculation of obtaining the absolute amount of adsorption we introduced simplified local-density (sld) model. a few of appropriate parameters were acqu...

applying nanoporous materials is an appropriate method for improving chemical quality of the water due to high surface area, internal porous structure (porosity), high absorption capability of harmful gases and liquids, and capability of reactivating the surface. therefore, actions were carried out in order to investigate the effect of activated carbon and zeolite on reducing the total dissolve...

this research was done in order to determine the basic criteria for “tehran oil refinery effluemt treatmentunit” to prove the feasibility of the application of powdered activated carbon in aeration zone of activated sludge system. the main stages of this research included: determination of qualitative and quantitative characteristics of raw wastewater preparation of two pilot scale units of act...