Natural organic matters

Natural organic matter Nonpurgeable organic carbon Parts per million by volume Permeable reactive barriers Polyvinyl chloride 

Natural organic matter (Chefetz et al. 2000) Cuticular materials (Chen et al. 2005) 

A Natural organic matter (Salloum et al. 2002) O Humic acids (Simpson et al. 2003) 

Paraffinic carbon (0-50 ppm, %) content of natural organic matter 

In aquifers containing significant amounts of natural organic matter, benzene migration is retarded by sorption to the organic surfaces. 

Tratnyek PG, Scherer MM, Deng BL (2001) Effects of natural organic matter, anthropogenic surfactants, and model quinones on the reduction of contaminants by zero-valent iron. Water Res 35 4435 4443 

Equilibrium complexation constants for Cu reactions with natural organic matter and the details of Cu speciation are bound to remain somewhat uncertain, since the composition of the complexing molecules varies from site to site. What is not in dispute is that the fraction of dissolved copper present as free aquo Cu is probably very small in any natural water. In extremely pristine waters, hydroxide and carbonate complexes may dominate, but organic complexes usually dominate in waters containing more than a few tenths of a mg/L organic carbon. 

Chemical oxidation reactions incorporating contaminants into natural organic matter 

Davis, ]. A. (1984). Complexation of trace metals by adsorbed natural organic matter. Geochim. Acta 48, 679-691. 

Accardi-Dey A, Gschwend P (2002) Assessing the combined roles of natural organic matter and black carbon as sorbents in sediments. Environ Sci Techno 1 34 21-29 

Chefetz B, Deshmukh A, Hatcher P, Guthrie E (2000) Pyrene sorption by natural organic matter. Environ Sci Technol 34 2925-2930 

Campbell, P. G. C., Twiss, M. R. and Wilkinson, K. J. (1997). Accumulation of natural organic matter on the surfaces of living cells implications for the interaction of toxic solutes with aquatic biota, Can. J. Fish. Aquat. Sci., 54, 2543-2554. 

The chemical composition of the soil and groundwater, specifically the amount of natural organic matter (NOM) and other reduced species, such as iron (II) or manganese (II) often analyzed as the chemical oxygen demand (COD) of the soil, or the soil oxidant demand. 

Sallounm, M.J., Chefetz, B., Hatcher, P.G. (2002) Phenanthrene sorption by aliphatic-rich natural organic matter. Environ. Sci. Technol. 36, 1953-1958. 

Sheng GY, Xu SH, Boyd SA (1996b). Mechanism(s) controlling sorption of neutral organic contaminants by surfactant-derived and natural organic matter. Environ Sci Technol 30 1553-1557 

Ritter K, Aiken GR, Ranville JF, Bauer M, Macaladi DL (2006) Evidence for the aquatic binding of arsenate by natural organic matter suspended Fe(III). Environ Sci Technol 40 5380-5387 

Dunnivant FM, RP Schwarzenbach, DL Macalady (1992) Reduction of substituted nitrobenzenes in aqueous solutions containing natural organic matter. Environ Sci Technol 26 2133-2141. 

McCarthy JF, Czerwinski KR, Sanford WE, et al. 1998a. Mobilization of transuranic radionuclides from disposal trenches by natural organic matter. J Contain Hydrol 30 49-77. 

Humic acids (HA) and fulvic acids (FA) are the main components of humic substances (HS), which are the most chemically and biochemically active and widely spread fractions of nonliving natural organic matter in all terrestrial and aquatic environments. They comprise a chemically and physically heterogeneous group of substances with colloidal, polydis-persed, polyelectrolyte characteristics and mixed aliphatic and aromatic nature (Senesi and Loffredo 1999). 

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