Management of solid wastes is considered as an economic and environmental issue in the building stone industry. The current study uses raw and calcined calcareous sludge, generated in the stone cutting factories, in order to remove sulfur dioxide. Sludge characterization has been performed, using X-ray fluorescence (XRF), X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy-d...

In this study, a sulfur-based autotrophic denitrifying filter (SADF) was developed for the purpose of removing nitrate from simulated recirculating mariculture wastewater. Results showed that over 90% could be effectively eliminated by utilizing thiosulfate as electron donor, with molar ratio thiosulfate-S to 2:1 or greater. Additional batch tests confirmed suitable sulfur source removal even w...

In this article, a series of effective catalysts based on betaine and sulfuric or phosphomolybdic acids was obtained. These compositions were characterized by various physicochemical methods tested in the oxidation sulfur- nitrogenous-containing compounds H2O2. An increase amount heteropolyacid (HPA) leads to non-linear change acidity, degree removal sulfur-containing correlates with concentrat...

The first enantioselective syntheses of sulfur flavan-3-ol analogues 1-8 have been accomplished, whereby the oxygen atom of the pyran ring has been replaced by a sulfur atom. The key steps were: (a) Pd(0) catalyzed introduction of -S t-butyl group, (b) Sharpless enantioselective dihydroxylation of the alkene, (c) acid catalyzed ring closure to produce the thiopyran ring, and (d) removal of benz...

The treatment of sulfur odorous compounds in mixture, Hydrogen sulfide (H2S), dimethyl disulfide (DMDS) and ethanethiol (EtSH), by biofiltration was examined. A significant effort was focused on the impact of nutrients supply, without forgetting the effect of other parameters such as the pH, on the process performances. Removal efficiencies of three biofilters packed with pine bark and composte...

The thyroid glands of rats were made non-functional by a single dose of iodine-131 on the 1st day after birth or by surgical removal on the 28th day. The incorporation of sulfate-sulfur into the sulfomucopolysaccharides of skeletons and pelts was found to be significantly depressed by thyroidectomy. Daily supplements of 5 or 10 gamma of L-thyroxine, started on the 28th day, increased the uptake...

The widespread use of diesel fuel for transportation, industry, and electricity generation causes several environmental issues via an increase in the amount sulfur compound emissions. Commercial must be free sulfur-containing compounds since they can cause problems. Considering currently available processes to eliminate compounds, oxidative desulfurization (ODS) is one effective means this purp...