Dissolved organic matter isolating

Koprivnjak, J.-F., Pfromm, P. FL, Ingall, E., Vetter, T. A., Schmitt-Kopplin, P, Hertkorn, N., Frommberger, M., Knicker, H., and Perdue, E. M. (2009). Chemical and spectroscopic characterization of marine dissolved organic matter isolated using coupled reverse osmosis-electrodialysis. Geochim. Cosmochim. Acta, in press. 

Benoit J. M., Mason R. P., Gilmour C. C., and Aiken G. R. (2001c) Constants for mercury binding by dissolved organic matter isolates from the Florida Everglades. Geochim. Cosmochim. Acta 65(24), 4445-4451. 

Table IV. Identities of the products relased after TMAH thermochemolysis of the dissolved organic matter isolated from the Suwanee river.

Ravichandran, M. et al.. Enhanced dissolution of cinnabar (mercuric sulfide) by dissolved organic matter isolated from the EloridaEverglades, Environ. Sci. Technol., 32, 3305, 1998. 

S.L. Holder Sandvik, P. Bilski, J.D. Pakulski, C.F. Chignell, R.B. Coffin (2000). Photogeneration of singlet oxygen and free radicals in dissolved organic matter isolated from the Mississippi and Atchafalaya River plumes. Mar. Chem., 69, 139-152. 

Fig. 3.20. Electrospray ion cyclotron resonance mass spectra of dissolved organic matter isolated from Experimental Nutrient Removal (ENR) wetland outflow before (top) and after (bottom) selective organic phosphorus concentration. Reprinted from Llewelyn etal. (2002) with permission from the American Chemical Society.

Once a sample of dissolved organic matter has been isolated, it is still seldom in a form that permits simple analysis. In most cases, there are far too many compounds present and some form of fractionation must take place to remove interferences and simplify analytical procedures. 

Jeffrey LM (1969) Development of a method for isolating gram quantities of dissolved organic matter from seawater and some chemical and isotopic characteristics of the... 

Mills et al. [20] carried out reversed-phase liquid chromatographic studies of dissolved organic matter and copper-organic complexes isolated from estuarine waters. 

Kerr RA (1977) The isolation and partial characterization of dissolved organic matter in seawater. PhD Dissertation. University of Rhode Island... 

Recent investigations provide new insight on the structural chemistry of dissolved organic matter (DOM) in freshwater environments and the role of these structures in contaminant binding. Molecular models of DOM derived from allochthonous and autochthonous sources show that short-chain, branched, and alicyclic structures are terminated by carboxyl or methyl groups in DOM from both sources. Allochthonous DOM, however, had aromatic structures indicative of tannin and lignin residues, whereas the autochthonous DOM was characterized by aliphatic alicyclic structures indicative of lipid hydrocarbons as the source. DOM isolated from different morphoclimatic regions had minor structural differences. 

Another analytical constraint is the definition of dissolved organic matter. Filters in the 0. l-1.0- im size range pass colloids that are not truly dissolved. Studies discussed in this chapter will be limited to natural organic solutes that are either isolated by adsorption chromatography or ultrafiltered through 0.005- JLm filters. Although neither of these techniques will absolutely ex-... 

R.A. Kerr and J.G. Quinn, Chemical studies on the dissolved organic matter in seawater isolation and fractionation, Deep-Sea Res. 22 (1975) 107-116. 

Kalbitz, K., Geyer, S., and Geyer, W. (2000). A comparative characterization of dissolved organic matter by means of original aqueous samples and isolated humic substances. Chemosphere 40,1305-1312. 

Kilduff, J. E., Mattaraj, S., Wigton, A., Kitis, M., and Karanfil, T. (2004). Effects of reverse osmosis isolation on reactivity of naturally occurring dissolved organic matter in physicochemical processes. Water Res. 38,1026-1036. 

Kitis, M., Kilduff, J. E., and Karanfil,T. (2001). Isolation of dissolved organic matter (DOM) from surface waters using reverse osmosis and its impact on the reactivity of DOM to formation and speciation of disinfection by-products. Water Res. 35, 2225-2234. 

Ma, H., Allen, H., and Yin, Y. (2001). Characterization of isolated fractions of dissolved organic matter from natural waters and a wastewater effluent. Water Res. 35, 985-996. 

Serkiz, S. M., and Perdue, E. M. (1990). Isolation of dissolved organic matter from the Suwannee River using reverse osmosis. Water Res. 24, 911-916. 

Mills, G. L., and Quinn, J. G. (1981). Isolation of dissolved organic matter and dissolved copper-organic complexes from estuarine waters using reverse-phase liquid chromatography. Mar. Chem. 10, 93-102. 

Simjouw, J.-E, Minor, E. C., and Mopper, K. (2005). Isolation and characterization of estuarine dissolved organic matter Comparison of ultrafiltration and C18 solid-phase extraction techniques. Mar. Chem. 96, 219-235. 

Sun L. (1993) Isolation, characterization, and bioavailability of dissolved organic matter in natural waters. PhD Thesis, Georgia Institute of Technology, 139pp. 

---