Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

International Humic Substances Society

The HS samples used in this work were obtained from the Standard and Reference Collection of HAs and FAs of the International Humic Substances Society (IHSS), with the exception of the HA from an alluvial soil. The origin and nature of HS, with the corresponding codes, abbreviations and concentrations used, are shown in Table 1. [Pg.283]

Amalay M, Bussieres D (1996) In Clapp CE, Hayes MHB, Senesi N, Griffith SM (eds) Humic substances and organic matter in soil and water environments. International Humic Substances Society, University of Minnesota, Madison, p 251... [Pg.166]

Humic (HA) and fulvic acids (FA) and Humin (HU) were isolated utilizing the standard method recommended by the International Humic Substances Society (IHSS). Their amounts were obtained by quantifying carbon in each fraction and in each step of the fractionation procedure. [Pg.112]

An extraction method for isolating humic substances from water by using XAD-8 has been proposed by Thurman and Malcolm (9) (see box). Humic substances in natural waters represent almost the entire hydrophobic acid fraction. This method has been used to isolate 4.25 g of humic substances from 24,500 L of ground water from the Fox-hills-Laramie aquifer and to obtain 500 g of humic material from 10,400 L of the Suwannee River (Table II). The sample from the Suwannee River was collected as a reference sample of aquatic humic substances by the International Humic Substances Society. In both of the examples cited, a fc cutoff of 100 was used. [Pg.299]

Standard materials were also investigated for comparison. These included two humic acids, one from Alfa Aesar (CAS 1415-93-6) obtained from an unknown source, and one from the International Humic Substances Society (IHSS) obtained from standard Elliot soil. IHSS fulvic acid from Elliot soil was also used for comparison. Humic acids are ubiquitous geologic contaminants present in archaeological materials that have been exposed to soil or groundwater, and are important comparative materials for surfaces that are to be (or in this case, have been) radiocarbon dated by the PCO-AMS technique. [Pg.155]

Watt, B. E., T. M. Hayes, M. H. B. Hayes, R. T. Price, R. L. Malcolm, and P. Jakeman. 1996. Sugars and amino acids in humic substances isolated from British and Irish waters. In Humic Substances and Organic Matter in Soil and Water Environments Characterization, Transformations and Interactions (C. E. Clapp, M. H. B. Hayes, N. Sensesi, and S. M. Griffith Eds.), pp. 81-91. International Humic Substances Society, St. Paul, MN. [Pg.119]

When the International Humic Substances Society (IHSS) was founded at a meting in the US Geological Survey in September 1981, it was decided to hold... [Pg.4]

Hayes, M. H. B., Dawson, J. E., Mortensen, J. L., Clapp, C. E., and Hausler, M. J. (1985). Comparisons of synthetic humic-like substances with soil humic acids. In Volunteered Papers, 2nd International Conference, International Humic Substances Society (Birmingham, 1984), Hayes, M. H. B., and Swift, R. S., eds., IHSS, University of Minnesota, St. Paul, pp. [Pg.34]

Wang, M. C., and Huang, P. M. (1997). Catalytic power of bimessite in abiotic formation of humic polycondensates from glycine and pyrogallol. In The Role of Humic Substances in the Ecosystems and in Environmental Protection, Proceedings, 8th Conference of the International Humic Substances Society, Drozl, J., Gonet, S. S., Senesi, N., and Webber, J., eds., Wroclaw, Poland, pp. 59-65. [Pg.108]

Grasso, M., D Orazio, V., and Senesi, N. (2004). Spectroscopic characterization of soil organic matter fractions from rhizosphere and bulk soils cultivated for tomato and artichoke. In Proceedings, 12th Meeting of the International Humic Substances Society, Sao Pedro, Brazil, pp. 368-371. [Pg.361]

Pinton, R., Cesco, S., Schmidt W., and Varanini, Z. (2006). Role of humic substances as rhizospheric signals affecting root growth and mechanisms of nutrient acquisition. In Proceedings, 13th Meeting of the International Humic Substances Society, Karlsruhe, vol. 45-1, pp. 45 18. [Pg.363]

Elemental analysis and the detailed characterization require the extraction and purification of soil organic matter. International Humic Substances Society (2008)... [Pg.211]

Thorn K. A., Folan D. W., and MacCarthy P. (1992) Characterization of the International Humic Substances Society Standard and Reference Fulvic Acids by Solution State Carbon-13 and Hydrogen-1 Nuclear Magnetic Resonance Spectrometry. Water Resources Investigations Report 89-4196, U.S.G.S. Denver, 93pp. [Pg.2570]

Researchers have devised numerous extraction and fractionation schemes to deal with the heterogeneous nature of humic substances. Traditionally, the operational definition of humic substances as used by the International Humic Substances Society (Hayes et al., 1989) is based on the solubility in a series of acids and bases. In this scheme, humic substances are classified into three chemical groupings (1) fulvic acid, soluble in both alkali and acid solutions, has the lowest molecular weight and is generally considered the most susceptible to microbial degradation (2) humic acid, soluble in alkali but not in acid, is intermediate in molecular weight and decomposability and (3) humin, insoluble in both alkali and acid solutions, is the most... [Pg.4118]

Thorn, K.A. Weber, E.J. Spidle, D.L. Pettigrew, P.J. In Humic substances in the global environment and implications in human health, Senesi, N. Miano, T.M., Ed. 6 International Meeting International Humic Substances Society Abstracts Monopoli, Italy Segreteria Organizzativa Bari, Italy 1992, pg 119. [Pg.75]

Thom, K.A. Folan, D.W. MacCarthy, P. Characterization of the international humic substances society standard and reference fulvic and humic acids by solution state carbon-13 O C) and hydrogen-1 OH) nuclear magnetic resonance spectroscopy , U.S. Geological Survey, Water Resource Investigations Report, Denver, Co, 1989 89-4196, pp. 1-4. [Pg.75]

The U.S. Geological Survey of the United States Department of the Interior has provided critical support to the first meeting of the International Humic Substances Society, and to the other undertakings of the new society, such as collection of the standard aquatic humic substance sample. This publication was made possible, in part, by a grant to the International Humic Substances Society from the U.S. Geological Survey, Department of the Interior, under U.S.G.S. Agreement No. 14-08-000l-G-717. [Pg.701]

Allison, J.A. Perdue, E.M. (1994) Modelling metal-humic interactions with MINTEQA2. Proceedings of the 6th International Meeting of the International Humic Substances Society, Bari, Italy. [Pg.37]

PZC/IEP of Humic Substances from International Humic Substances Society... [Pg.853]

Details of experimental procedures are given elsewhere by Liang (14). Deionized distilled water was used to prepare all solutions. All reagents were analytical grade and were used without further treatment. Fatty acids and polyaspartic acids were obtained from Sigma and were at least 99% pure. Fulvic and humic acids were supplied by the International Humic Substances Society. [Pg.294]

Heitz, A., loll, C., Alexander, R., and Kagi, R. I., Characterization of aquatic natural organic matter in some Western Australian drinking water sources. In Understanding and Managing Organic Matter in Soils, Sediments and Waters, Swift, R. S. and Spark, K. M., Eds., International Humic Substances Society, Adelaide, Australia, 2001. [Pg.306]

Proceedings of the 1st Meeting of the International Humic Substances Society. Ester Park, Colorado, August 1983. Org. Geochem., 8 (1985). [Pg.151]


See other pages where International Humic Substances Society is mentioned: [Pg.155]    [Pg.438]    [Pg.111]    [Pg.277]    [Pg.87]    [Pg.8]    [Pg.17]    [Pg.210]    [Pg.335]    [Pg.371]    [Pg.430]    [Pg.601]    [Pg.673]    [Pg.899]    [Pg.199]    [Pg.313]    [Pg.1257]    [Pg.305]    [Pg.11]    [Pg.352]    [Pg.354]    [Pg.454]    [Pg.853]   
See also in sourсe #XX -- [ Pg.283 ]

See also in sourсe #XX -- [ Pg.9 ]

See also in sourсe #XX -- [ Pg.10 ]

See also in sourсe #XX -- [ Pg.536 ]




SEARCH



Humic substances

International Humic Substances

International Humic Substances Society IHSS)

© 2024 chempedia.info