The effect of sequential extraction of trace metals on sulfur (S) speciation in anoxic sludge samples from two lab-scale biogas reactors augmented with Fe was investigated. Analyses of sulfur K-edge X-ray absorption near edge structure (S XANES) spectroscopy and acid volatile sulfide (AVS) were conducted on the residues from each step of the sequential extraction. The S speciation in sludge sam...

A commentary on Sulfur dioxide contributes to the cardiac and mitochondrial dysfunction in rats A commentary on Sulfur dioxide contributes to the cardiac and mitochondrial dysfunction in rats The article by Qin et al. showed that sulfur dioxide contributes in the impairment of cardiac and mitochondrial function in rat H9C2 transformed cardiomyoblasts (1). The authors investigated the effect of ...

Selenium and sulfur are two closely related basic elements utilized in nature for a vast array of biochemical reactions. While toxic at higher concentrations, selenium is an essential trace element incorporated into selenoproteins as selenocysteine (Sec), the selenium analogue of cysteine (Cys). Sec lyases (SCLs) and Cys desulfurases (CDs) catalyze the removal of selenium or sulfur from Sec or ...

* Culture 7 days old. Flasks of sulfur medium were inoculated with T. thiooxidans and incubated at 28 C as shaken cultures. At several incubation periods, determinations were made of the surface tension of the culture medium freed of elemental sulfur, before and after removal of cells. The surface tension of the sterile culture medium (72.0 i 0.5 dynes/ cm) was practically identical to that of ...

The metabolism of catechols often involves their oxidation to quinones and subsequent nucleophilic addition reactions with sulfur-containing compounds. Adducts formed during these reactions may play important roles in many biological systems. We have studied the electrochemical oxidation of N-acetyldopamine (NADA) and N-beta-alanyldopamine (NBAD) in the presence of two sulfur-centered nucleophi...

A series of CuBi co-doped mesoporous zeolite Beta (CuxBiy-mBeta) were prepared by a facile one-pot hydrothermal treatment approach and were characterized by XRD, N2 adsorption-desorption, TEM/SEM, XPS, H2-TPR, NH3-TPD and in situ DRIFTS. The catalysts CuxBiy-mBeta were applied to the removal of NOx by selective catalytic reduction with ammonia (NH3-SCR), especially the optimized Cu1Bi1-mBeta ac...

Ion exchange systems for the removal of nutrient pollutants, even at extremely low concentrations, from wastewater effluents are a major environmental need. This work reports on the features of batch sorption processes for the ultimate removal and recovery of reactive phosphorus, nitrogen, and sulfur anions from aquaculture production wastewater effluents. The sorbent used was a crosslinked pol...

Coal desulfurization prior to usage is frequently subjected preprocessing achieve clean fuel and reduce environmental impacts. In this study, of Mach coal Balochistan was investigated with different leaching solvents. The solvents used are NaOH HNO 3 . Effects particle size solvent weight% on sulfur removal were studied, whereas the temperature agitation time kept constant. Desulphurization exp...

Biotreatment of various ratios of H2S and NH3 gas mixtures was studied using the biofilters, packed with co-immobilized cells (Arthrobacter oxydans CH8 for NH3 and Pseudomonas putida CH11 for H2S). Extensive tests to determine removal characteristics, removal efficiency, removal kinetics, and pressure drops of the biofilters were performed. To estimate the largest allowable inlet concentration,...

A rare case of culture-positive Nocardia canaliculitis is reported that presented with a history of chronic conjunctivitis and epiphora for the last 1.4 years, refractory to multiple treatment courses. Chronic conjunctivitis and a pouted punctum were observed in the right lower eyelid. Probing and sac syringing was performed. The "Sulfur granules" were expressed and subjected to various microbi...