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...

Creosoteand chromated copper arsenate (CCA)-treated wood waste and untreated southern pine wood were liquefied with phenol and sulfuric acid. The effects of sulfuric acid content, liquefaction time, liquefaction temperature, and phenol to wood ratio on liquefaction rate (i.e., wood residue content) were investigated and analyzed by analysis of variance (ANOVA). The results showed that both creo...

The habitat of metal respiring acidothermophilic lithoautotrophs is perhaps the most oxidizing environment yet identified. Geothermal heat, sulfuric acid and transition metals contribute both individually and synergistically under aerobic conditions to create this niche. Sulfuric acid and metals originating from sulfidic ores catalyze oxidative reactions attacking microbial cell surfaces includ...

A novel flow injection method has been developed for the indirect determination of uranium by the on-line reduction and subsequent fluorimetric detection of cerium(III). A sample solution containing uranium(VI), prepared as a sulfuric acid solution, was injected into a sulfuric acid carrier solution and passed through a column packed with metal bismuth to reduce uranium(VI) to uranium(IV). The ...

The AE&C single absorption–scrubbing process has long been an alternate to double absorption for the production of sulfuric acid. In recent years regulatory pressure to reduce SO2 emissions from sulfuric acid plants to 1.0-1.25 pounds of SO2 per ton of acid produced (to about 120 PPM) or less coupled with the increased value of energy has enhanced the desirability of the single absorption–scrub...

Other recent laboratory measurements for aqueous ammonium sulfate and sulfuric acid solutions show considerable variability in freezing point temperatures – much more than is predicted by the widely-used translated melting-point curve (TMPC) idea of Koop et al. (2000). This paper reports on results from laboratory measurements of homogeneous ice nucleation in aqueous droplets containing two com...