We present a study of elemental abundances in a sample of 13 blue compact dwarf (BCD) galaxies, using the 10– 37 mhigh-resolution spectra obtained with Spitzer IRS.We derive the abundances of neon and sulfur for our sample using the infrared fine-structure lines probing regions which may be obscured by dust in the optical and compare our results with similar infrared studies of starburst galaxi...

Multiple sulfur isotope measurements of sulfur compounds associated with dissimilatory sulfate reduction, elemental sulfur disproportionation and sulfite disproportionation indicate that different types of metabolic processes impart different multiple isotope signatures. An established network for sulfate reduction was used previously to explain the multiple isotope variability. Here, we revisi...

Elemental sulfur is an important non-metallic material that widely used in various fields including chemical, metallurgical and sulfuric acid industries. Polymetallic slag (PSS) secondary resource for the recovery of sulfur. However, separation from PSS difficult due to tight binding some thiophilic metals Herein, we proposed a recrystallization method effective by using organic solvents contro...

kinetics of the chemical leaching of chalcocite from a low-grade copper ore in a ferric sulfate medium was investigated using the constrained least square optimization technique. the experiments were carried out for different particle sizes in both the reactor and column at constant eh, ph, and temperature. the leaching rate increased with increase in the temperature. about 50% of the cu recove...