Sulfide emission

As far as organic matter transformations are concerned, the process rates are significantly slower compared with aerobic transformations. Basically, readily biodegradable organic matter is preserved and even, to some extent, produced opposite to the situation when aerobic processes proceed. The sulfur cycle, until now included in the sewer process model, is relatively simply described following empirical expressions for sulfide formation. Other important processes in this respect, e.g., hydrogen sulfide emission and sulfide oxidation, still need to be included, however, and, most of all, investigated from a conceptual point of view. 

Nagl, G.J. Air controlling hydrogen sulfide emissions. Environ. Technol. 1999, 9 (7), 18-23. 

Hydrogen sulfide emissions controlled below regulated limits. 

CEI produced the Sulphlex-233/ in 7.5 ton (6.8 tonne) batches the reaction vessel has a nominal 9 ton (8.2 tonne) capacity, is steam heated, and is equipped with a wet scrubber system to control potential hydrogen sulfide emissions. Since no cooling capability was available, the reaction exotherm was controlled by the rate at which the preblended chemical modifiers were added to the reaction mass. 

Eotential substrate for hydrogen sulfide emission as well ( ). However, only ydrogen sulfide emission in response to sulfur dioxide, sulfate, or cysteine has been studied in detail. 

When cucurbit cells are fed O-acetylserine or its metabolic precursors the rate of hydrogen sulfide emission in response to sulfate declines, and the incorporation of labeled sulfur from 35S-sulfate into cysteine increases (18). Inhibition of the synthesis of the O-acetylserine precursor acetyl coenzyme A by 3-fluoropyruvate (22) enhances hydrogen sulfide emission, but inhibits cysteine synthesis (1 ). These observations indicate that the availability of O-acetylserine is the rate limiting factor in cysteine synthesis. Hydrogen sulfide may be emitted to the extent the amount of sulfate reduced exceeds the synthesis of O-acetylserine. Therefore, direct release of sulfide from carrier-bound sulfide appears to be responsible for the emission of hydrogen sulfide in response to sulfate (Figure 1, pathway 1). 

North Sea Dimethyl Sulfide Emissions as a Source of Background Sulfate over Scandinavia... 

Hitchcock, D. (1975) Dimethyl sulfide emissions to the global atmosphere. Chemosphere 3, 137-138. 

Bopp L, Aumont O, Belviso S, Monfray P (2003) Potential impact of climate change on marine dimethyl sulfide emissions. Tellus B 55 11-22... 

Hydrogen sulfide emissions were monitored at the sulfur-asphalt mixing equipment at the hot-mix plant and at the paving site. A Houston-Atlas ambient H2S detection system, furnished and operated by the U.S. Bureau of Mines, was used as well as portable equipment such as a Rotorod Gas Sampler and Drager tubes. The emissions at some of the critical areas of the hot-mix plant and paving site are given in Table VI. 

Castro M. S. and Dierberg F. E. (1987) Biogenic hydrogen sulfide emissions from selected Florida wetlands. Water Air Soil Pollut. 33, 1 — 13. 

TABLE 15.12 Total Reduced Sulfide Emissions from the Chemical Recovery Operations of a Kraft Pulp Mill, in kg S per Air Dry Tonne of Pulp"... 

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