Acid volatile sulphide

Florin THJ. 1991. Hydrogen sulphide and total acid-volatile sulphide in feces, determined with a direct spectrophotometric method. Clin Chim Acta 196 127-134. [Pg.185]

Fig. 12.6 Bar graph of acid volatile sulphide in a sediment core collected from Blelham Tarn on 30 July 1980 Rowlatt s mean data forthe sediments of this lake (distillat-ion/iodometric procedure) [110]...

Iron sulphides are ubiquitous in marine and freshwater sediments. They are usually present either as pyrite or as monosulphides, which can be liberated by hydrochloric acid. These acid volatile sulphides give rise to an intense black colour that is characteristic of anoxic sediments. They play an important role in recent diagenetic processes in sediments and the ratio of pyrite to acid volatile sulphides has been used as an historical indicator to determine whether sediments were formed in marine or freshwater conditions. They can be present over a wide range of... [Pg.346]

Morse and Cornwell [112] investigated methods for determining acid volatile sulphides and pyrites in marine sediments from several typical... [Pg.347]

American Society for Testing and Materials Acid-Volatile Sulphide... [Pg.67]

Ankley, G.T., Mattson, V.R., Leonard, E.N., West, C.W. and Bennett, J.L. (1993) Predicting the acute toxicity of copper in freshwater sediments Evaluation of the role of acid volatile sulphide, Environmental Toxicology and Chemistry 12, 315-320. [Pg.273]

Whole-sediment chemistry (metals, PAHs, PCBs, total organic carbon [TOC] grain size, acid-volatile sulphides/simultaneously extractable metals [AVS/SEM]). [Pg.316]

Apparent Effect Levels Acid Volatile Sulphide Ambient Water Quality Guideline Contaminant Body Residue... [Pg.328]

Gagnon, C., Micci, A., and Pelletier, E. (1995) Anomalous accumulation of acid-volatile sulphides (AVS) in a coastal marine sediment, Sagueny Fjord, Canada. Geochim. Cosmochim. Acta 59, 2663-2675. [Pg.583]

AVS Acid-volatile sulphides Pyr. S pyrite sulphide OC organic carbon Reactive Fe reactive iron B/D Bligh/Dyer extraction Resid. IPS residual lipopolysaccharide fatty acids TL total lipid NL neutral lipid SACC silicic acid column chromatography GL glycolipid... [Pg.129]

Figure 7.17 Variation in geochemical parameters and indicators of microbial activity within different parts of the concretion and host sediment from site 93LD (a) % organic carbon and viable microbial biomass, (b) different forms of extractable iron, (c) % acid volatile sulphide (AVS) and % total reduced sulphur (TRS).

Additional Acidic volatile sulphides (AVS) in (tmol/g of dry weight WFD... [Pg.397]

The acid volatile sulphide fraction (AVS), which represents the portion of the total sulphide concentration recovered and measured in a cold acid extraction of the bulk sediment, is compared to the simultaneously extracted metal (SEM), which represents the fraction of metal measured in the same cold acid extraction. If the sum of SEM is lower than the amount of AVS, free metal is unlikely to occur in interstitial water. [Pg.402]

Keywords Acid-volatile sulphide Bioavailability Pore water Redox Sediment Trace metals... [Pg.517]

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