The release of sulfur dioxide (SO2) into the atmosphere as a result of man’s domestic and industrial activities is a great environmental concern. A significant source of SO2 release into the atmosphere is industrial manufacture of sulfuric acid. A synthetic procedure that is linked with the medieval alchemist named Geber is introduced as a method to be considered for “greener” synthesis of sulf...

Polyetheretherketone (PEEK) is a material suitable for frameworks of fixed dental prostheses. The effect of different surface treatments on the bond strength of PEEK bonded to human dentin was evaluated. One hundred PEEK cylinders (3 mm×3 mm) were divided into five groups according to surface treatment: silica coating, sandblasting with 45 μm Al2O3 particles, etching with 98% sulfuric acid for ...

Particle size distributions in the range of 1.34– 615 nm were recorded from 25 November 2013 to 25 January 2014 in urban Shanghai, using a combination of one nano condensation nucleus counter system, one nano scanning mobility particle sizer (SMPS), and one longSMPS. Measurements of sulfur dioxide by an SO2 analyzer with pulsed UV fluorescence technique allowed calculation of sulfuric acid prox...

To examine whether acid treatment of a non-graphitizing hard carbon influences positively or negatively its electrochemical anodic performance, this study reports the effects of sulfuric acid treatment on the microstructural changes and electrochemical performance of PAN-based hard carbons prepared at various temperatures. It was found that PAN-based hard carbons heat treated at 900 C (TAN9) ex...

Abstract The study was conducted to extract zinc and the results on extraction of Zn from sublime with solution sulfuric, thermal phosphoric acids are presented depending Solid: Liquid (S:L), concentration duration leaching process. Sulfuric acid used a content 8% which is waste product non-ferrous metallurgy, phosphorites Central Kyzylkum. It has been established that maximum degree noted when...

We discuss the possible role of energy nonaccommodation (monomer-cluster collisions that do not result in stable product formation due to liberated excess energy) in atmospheric nucleation processes involving sulfuric acid. Qualitative estimates of the role of nonaccommodation are computed using quantum Rice-Ramsberger-Kassel theory together with quantum chemically calculated vibrational freque...

There exist significant gaps in our understanding of human health effects from inhalation of pollutants associated with acid precipitation. Controlled clinical studies examine effects of criteria pollutants almost exclusively by assessing changes in lung mechanics. One constituent of acid precipitation, sulfuric acid aerosols, has been shown to induce bronchoconstriction in exercising extrinsic...

The urinary metabolites of N-2-fluorenylacetamide were separated by chromatography on an alumina column into three classes: (a) unconjugated materials, amounting to 5-10 per cent of the urinary activity; (b) sulfuric acid conjugates (20-25 per cent); (c) glucuronic acid conjugates (60-70 per cent). Evidence for the structure of these materials was adduced by solvent partition, paper chromatogra...

Inhalation toxicology experiments in whole animals have demonstrated a remarkable lack of toxicity of sulfuric acid in the form of respirable aerosols, especially in rats and nonhuman primates. Thus, much of the current experimental emphasis has shifted to the evaluation of the potential health effects of acid aerosols as components of mixtures. Rats have been concurrently exposed to mixtures o...