Interaction with organic matter

Graber ER, Borisover M (2005) Exploring organic compound interactions with organic matter the thermodynamic cycle approach. Colloid Surface A 265 11-22... 

Concentrations of H2S typically are maintained low by a variety of reactions including oxidation, precipitation with iron, and interactions with organic matter. Sulfide may be oxidized biologically or abiotically. Elemental S reacts readily with H2S to form polysulfides (175) and is oxidized and reduced by a variety of bacteria. In radiotracer experiments, S0 was in... 

Triazine Interactions with Organic Matter in Soil... 

Figure 17 shows schematically the major transformations of sulfur in aquatic systems and their related isotopic fractionations. Processes that do not significantly fractionate sulfur isotopes include (i) weathering of sulfide and sulfate minerals, (ii) adsorption-desorption interactions with organic matter, and (iii) isotopic exchange between S04 and HS or H2S in low-temperature environments. Precipitation of sulfate minerals is accompanied by only slight isotopic fractionation, and the precipitates are generally... 

EXTRATERRESTRIAL ICE WITH EMPHASIS ON AGGREGATION/INTERACTION WITH ORGANIC MATTER COLLISIONAL AND ACCRETIONAL PROPERTIES OF MODEL PARTICLES... 

The ultimate result is that not only Fe, but most metals that interact strongly with organic matter or oxide adsorbents, are likely to settle out of the water column in estuaries. Not only does this process reduce the metal flux reaching the ocean, but 50% of the time the current at the bottom of an estuary actually facilitates the movement of metals upstream. 

The humic/organic matter coatings of different solid phases (i. e., SPm /SP0M), such as soils, sediments, suspended solids, colloids, and biocolloids/biosolids, interact with organic pollutants in aqueous systems in various ways. Adsorption is an important interaction mode. The reversibility and/or irreversibility of the adsorption processes is of major importance. The question whether the bound residues of pollutants are to be considered definitely inactivated has been the focus of extensive research. This question was posed as follows. Have the adsorbed pollutants become common components incorporated into the humic polymer coating of solid phases (i. e., being absorbed), or are they only momentarily inactivated in reversibly bound forms thus representing a possible source of pollution by a time-delayed release of toxic units ... 

Somewhat simplified, the process of interaction of high-energy electrons with organic matter can be divided into three primary events ... 

However, where sequential extraction steps are to be adopted, with the aim of fractionating the total content into specific categories (e.g., exchangeable, weakly adsorbed, associated with organic matter), an improved understanding of the chemical equilibria associated with the extractant-solid interactions becomes highly desirable. 

Gobas, F.A.P.C. and X. Zhang. 1994. Interactions of Organic Chemicals with Organic Matter in the Aquatic Environment. In Environ. Toxicol. Chem. Special Publication, "Bioavailability Physical, Chemical and Biological Interactions, J.L. Hamelink, Peter F. Landrum, Harold L. Bergman, and W.H. Benson, Eds., pp. 83-91, Lewis Publishers, Chelsea, MI. 

Fig. 2. Suggested interaction of silicic acid with organic matter through hydrogen bonding...

Vigorous to violent reactions with organic matter.2 Diphenyl Ether. Vigorous interaction above 40°C.3... 

Normally, because of the small size of soil particles and the presence of small capillaries and pores in the soil, the water phase is not totally independent of soil solid matter. Water present in larger spaces in soil is relatively more available to plants and readily drains away. Water held in smaller pores or between the unit layers of clay particles is held much more firmly. Water in soil interacts strongly with organic matter and clay minerals. 

Figure 6.7. A model for the interaction of organic matter (OM) with calcium carbonate. Variables are total organic carbon (TOC), dissolved oxygen, and composition of organic matter. (After Mitterer et al 1985.)...

Interactions of carbonate minerals with organic matter and the influences of these interactions require more investigation. 

Light interacts with living matter at various biological organization levels (1) the biomolecule, (2) subcellular structures, (3) cells, (4) biotissues, (5) organs, and (6) the whole organism. All these structures fall within different sections of the spatial spectrum (Figure 15.2). 

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