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Fractionated organics, characterization

Concentration, Fractionation, and Characterization of Organic Mutagens in Drinking Water... [Pg.586]

Imai, A., Fukushima, T., Matsushige, K., and Kim, Y. H. (2001). Fractionation and characterization of dissolved organic matter in a shallow eutrophic lake, its inflowing rivers, and other organic matter sources. Water Res. 35, 4019-4028. [Pg.400]

Zhou L.X. et al., Fractionation and characterization of dissolved organic matter derived from sewage sludge and composted sludge, Environ. Technol., 21, 765, 2000. [Pg.277]

Inorganic and organic colloids are most often intimately associated. Association of organic colloids, with clays (Koshinen and Harper, 1990) and with iron oxyhydroxides (Tipping, 1981 Gu et al., 1995 Herrera Ramos and McBride, 1996) are commonly described in natural waters and have been the subject of laboratory experiments. For example. Ferret et al. (1994) have sampled, fractionated, and characterized submicron particles from the Rhine and showed that these colloids consist of a tight association between organic and inorganic material. [Pg.2505]

Phenanthrene Solubilization. A model characterizing the distribution of HOC in systems of soil and micellar nonionic surfactant solution was described previously (7). In this model HOC is assumed to partition among three distinct compartments the soil, the micellar pseudophase, and the aqueous pseudophase. The solubilization model accounts for the partitioning of HOC between the micellar pseudophase and the aqueous pseudophase, the increase in apparent HOC solubility associated with nonionic surfactant monomers in the aqueous pseudophase, the sorption of surfactant onto soil, and the increase in fractional organic carbon content of a soil as a result of surfactant sorption. Evaluation of the model with experimental data was described by Edwards et al. (12). [Pg.349]

There are three main sections in this book Geochemistry, Isolation and Fractionation, and Characterization. Each section is organized into a sequence of discrete topics that comprehensively cover the general subject. [Pg.7]

Humic acids from two lakes (Lakes Haruna and Kizaki) were separated by organic solvents into various fractions and characterized by H NMR spectroscopy (Ishiwatari, 1973). The results clearly showed the lake humic acids to be aliphatic in character (presence of a large peak in 1.0-1.4 ppm (8 value) range characteristic of acyclic methylenes) with no aromatic protons (absence of a peak in 6.0-8.0 ppm range). The lack of aromatic protons could be... [Pg.156]

Leenheer, J. A. and Malcolm, R. L. (1973). Fractionation and characterization of natural organic matter from certain rivers and soils by free-flow electrophoresis. U.S. Geol. Surv. Water-Supply Paper, 1817-E. [Pg.610]

Stevens, R. J. and Stewart, B. M. (1982). Concentration, fractionation and characterization of soluble organic phosphorus in river water entering Lough Neagh. Water Res. 16, 1507-1519. [Pg.632]

The results of fractionation and characterization studies of naturally occurring organo-clay complexes in a B t-horizon of a black solonetz silty clay loam were reported by Arshad and Lowe (1966). This soil was predominantly montmorillonitic with relatively large amounts of kaolinite in the coarse fraction and only traces in the fine clay. The data indicated that more organic matter was associated with the coarse clay fraction than with the fine clay. The percentage of extractable organic matter increased with decrease in particle size. There was no evidence of adsorption of organic matter in the clay lattice. As... [Pg.170]

Sample Fractionations. Organic materials were first frac-tionated using a column (1 m by 1.5 cm I.D.) filled with Sephadex LH-20. The column is first eluted with 240 nt of tetrahydrofuran which elutes the least polar and the higher molecular weight compounds first followed by the more polar ones. A final, very polar, fraction is eluted with 300 ml of methanol. Several standards were run to characterize the elution of classes of organic compounds from the column as shown in Figure 2. [Pg.208]

In vapor-liquid equilibria, if one phase composition is given, there are basically four types of problems, characterized by those variables which are specified and those which are to be calculated. Let T stand for temperature, P for total pressure, for the mole fraction of component i in the liquid phase, and y for the mole fraction of component i in the vapor phase. For a mixture containing m components, the four types can be organized in this way ... [Pg.3]

Solubility Properties. Fats and oils are characterized by virtually complete lack of miscibility with water. However, they are miscible in all proportions with many nonpolar organic solvents. Tme solubiHty depends on the thermal properties of the solute and solvent and the relative attractive forces between like and unlike molecules. Ideal solubiHties can be calculated from thermal properties. Most real solutions of fats and oils in organic solvents show positive deviation from ideaHty, particularly at higher concentrations. Determination of solubiHties of components of fat and oil mixtures is critical when designing separations of mixtures by fractional crystallization. [Pg.132]

DeNiro, M.J. and Weiner, S. 1988 Chemical, enzymatic and spectroscopic characterization of collagen and other organic fractions in prehistoric bone. Geochimica et Cosmochimica Acta 52 2197-2206. [Pg.86]


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Fractionated organics

Fractions characterization

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