Hydrophilic sulfur sols prepared from sodium thiosulfate and concentrated sulfuric acid and purified by repeated NaCl precipitation and peptization in water have been studied by chemical analysis, vibrational spectroscopy, ion-pair chromatography and reversed-phase HPLC. The composition of the sol is Na1 6 4S2 8 .606 • 5.9In S„ • 1.0 NaCl. The elemental sulfur S„ (n = 6 1 4 ; mainly S8) account...

Resource utilization of SO2 from flue gas is a key challenge for the green development smelting industry. Recovery sulfur resources in form elemental (S0), which has high market demand and current focus field treatment, can reduce solid waste desulfurization. In this study, it was found that Pb as cathode material had good catalytic activity electrochemical reduction selectivity towards sulfur....

Growing cultures of the green obligate photolithotroph, Chlorobaculum parvum DSM 263T (formerly Chlorobium vibrioforme forma specialis thiosulfatophilum NCIB 8327), oxidized sulfide quantitatively to elemental sulfur, with no sulfate formation. In the early stages of growth and sulfide oxidation, the sulfur product became significantly enriched with 34S, with a maximum delta34S above +5 per tho...

Acidithiobacillus ferrooxidans (A. ferrooxidans) was applied in coal biodesulfurization and coal's pyrite bioleaching. The result showed that A. ferrooxidans had significantly promoted the biodesulfurization of coal and bioleaching of coal's pyrite. After 16 days of processing, the total sulfur removal rate of coal was 50.6%, and among them the removal of pyritic sulfur was up to 69.9%. On the ...

An efficient flotation process was developed to selectively recover elemental sulfur from a high-sulfur pressure acid leaching residue of zinc sulfide concentrate. The mineralogy analysis showed that the content reached 46.21%, and 81.97% existed as which major mineral in primarily pellet aggregate biconical euhedral crystal. concentrate product with 99.9% recovery 83.46% purity obtained using ...

The catalytic reduction of SO2 to elemental sulfur by CO or CH4 over ceria-based catalysts under demanding operating conditions is reported in this paper. Cuor Ni-containing ceria catalysts have been shown before to be highly active and selective for SO2 reduction by CO in dry gas streams or in the presence of low amounts of H2O. In this work, the activity/selectivity of 10 at.%La-doped ceria, ...