Organic compounds in natural waters

Paris, D.F., Steen, W.C., Bauchman, G.L., and Barnett, J.T., Jr, Second-order model to predict microbial degradation of organic compounds in natural waters, Appl. Env. Microbiol., 41, 603-609, 1981. 

Cherry AB, Gabaccia AJ, Senn FIW. 1956. The assimilation behavior of certain toxic organic compounds in natural water. Sewage and Industrial Wastes. 28 1137-1146. 

Stan Van Den Berg is a Professor of Chemical Oceanography at the University of Liverpool. His research interests focus on the chemical specia-tion of trace elements and organic compounds in natural waters and the redox chemistry of metals and sulfides. His research group has pioneered advances in analytical techniques using electroanalytical methods (cathodic stripping voltammetry and chronopotentiometry). Dr. Van Den Berg is a broad-based analytical chemist. 

Light Absorption by Organic Compounds in Natural Waters... 

The nature of the organic compounds in natural waters has been the subject of considerable study (15, 40, 52, 65, 66). Only a few general comments are pertinent here. The fact that the greater part of the organic matter present in natural waters is nonliving is often overlooked by workers in water chemistry. Parsons (52) reported that in the euphotic zone of the sea, the relative proportions of organic matter are ... 

The relative importance of the three transient reactive species in regard to the removal efficiency of some organic compounds in natural waters can be estimated. According to the rate constants listed in Table 12.3, the removal... 

Barbash, J.E., and M. Reinhard. 1989. Reactivity of sulfur nucleophiles toward halogenated organic compounds in natural waters. In E.S. Saltzman and W.J. Cooper, ed., Biogenic Sulfur in the Environment, Vol. 393, 101-138. American Chemical Society, Washington, DC. 

Theis, T.L. and Singer, PC. (1973) The stabilisation of ferrous iron by organic compounds in natural waters. In Trace Metals and Metal Organic Interactions in Natural Waters (ed. Singer, RC.). Ann Arbor Science, Ann Arbor, MI. 

Thurman (1985) provided a comprehensive assessment of the distribution of identifiable organic compounds in natural waters. Total hydrolyzable amino acids accounted for 2-3% of DOC in rivers and 3 -13 % of DOC in eutrophic lakes. Total hydrolyzable sugars accounted for 5-10% of DOC in rivers and 8-12% of DOC in lakes. Thurman (1985) also summarized the... 

We have undertaken a large research effort on the study of nitrogeneous organic compounds in natural waters and water treatment plants. Among these substances, the amino acids demonstrate a particularly interesting behaviour. 

From the coefficient values, a generalisation can be proposed for the classification of wastewater (Fig. 32). This classification is based both on the value of the sum of the coefficients, excluding the fourth one corresponding to nitrate, and on the magnitude of the first (TSS) and fourth (nitrate) coefficients. This method can be applied in order to show the presence of anthropogenic organic compounds in natural water or to check the efficiency of a chemical or biological treatment. 

Second, a wide variety of organic compounds in natural waters and wastewater can act as complexing agents for metal ions. The nature and extent of metal ion complexation by natural water organics is not well-defined, probably because of the poorly defined nature of these organic compounds and also because of the staggering complexity of these... 

Their natural source of production is om the degradation of lignin (31,32) and sofl humic polymers. In nature, humic substances are by-products of lignin. Ligninand humic substances are compile aromatic polymers that constitute a major fraction of organic compounds in natural water and their presence in the wastewaters has been a problem fricii the water industry. The yellow to brown color of natural water is mainly due to the probI n of aquatic humic acids. Some of the nnportant characterisdes exhibited by all humic fractions are their resistance to microbial (gradation, and the... 

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