Neuse River

Clam, Rangia cuneata, Neuse River, North Carolina, 1965-67, soft parts before Chinese nuclear tests in May and December 1966 vs. posttest ... 

Wolfe, D.A. and C.L. Schelske. 1969. Accumulation of fallout radioisotopes by bivalve molluscs from the lower Trent and Neuse Rivers. Pages 493-504 in DJ. Nelson and F.C. Evans (eds.). Symposium on Radioecology. Proceedings of the Second National Symposium. Available as CONF-670503 from The Clearinghouse for Federal Scientific and Technical Information, Natl. Bur. Standards, Springfield, VA 22151. 

Microorganisms readily able to degrade hydrocarbons were found in the Neuse River estuary in North Carolina. Although the estuary was relatively free of hydrocarbon contamination, 63% of the bacteria and 71% of the fungi isolated from surface water samples were able to utilize kerosene as the sole carbon source (Buckley et al. 1976). Weathered kerosene (volatile components were allowed to escape prior to testing) was spiked with four marker hydrocarbons, and the degradation of the markers was monitored. 

Boyer, J. N., R. R. Christian, and D. W. Stanley. 1993. Patterns of phytoplankton primary productivity in the Neuse River estuary, North Carolina, USA. Marine Ecology Progress Series 97 287-297. 

Balthis, W.L., Hyland, J.L., Scott, G.I., Fulton, M.H., Bearden, D.W. and Greene, M.D. (2002) Sediment quality of the Neuse River estuary, North Carolina an integrated assessment of sediment contamination, toxicity, and condition of benthic fauna, Journal of Aquatic Ecosystem Stress and Recovery 9, 213-225. 

Figure 9.42 The relative importance of different microalgal groups (cryptomonads, dinoflagellates, diatoms, cyanobacteria, and chlorophytes) based on group-specific chlorophyll-a (kg) to total biomass, in the Neuse River estuary (USA) from 1994 to 1996. (Modified from Pinckney et al., 1998.)...

Pinckney, J.L., Paerl, H.W., Harrington, M.B., and Howe, K.E. (1998) Annual cycles of phytoplankton community-structure and bloom dynamics in the Neuse River estuary, North Carolina. Mar. Biol. 131, 371-381. 

Reckhow, K.H., and Gray, J. (2000) Neuse River Estuary modeling and monitoring project stage 1 stage 1 executive summary and long-term modeling recommendations. Report no. 325-A of the Water Resources Research Institute, University of North Carolina, Chapel Hill, N.C. 

Chemical Speciation Models. Using the stability constants derived by us for copper complexes with hydroxo and carbonate ligands (Table I) and for natural organic ligands (Table II), the Newport and Neuse Rivers were modeled for copper speciation as a function of pH, total copper, carbonate alkalinity and total dissolved organic matter. Speciation models were calculated from the equation ... 

Non-ideal behavior of the cupric ion electrode occurs at pECujot] > 7 in the titrations of both filtered and unfiltered Newport River water at pH 5.95 and filtered water at pH 7.0 and 8.0. At low total copper concentrations, measured pCu values approach a constant value independent of the total copper in solution. Similar behavior was observed for filtered Neuse River water at pH 8.0, but not at pH 6.78. 

Figure 6. Copper titrations of Neuse River water at 25°C. (%) Untreated water at in situ pH 6.78 glass-fiber filtered water at pH 6.78 (A) glass-fiber filtered water at pH 8.00 (0) UV-treated glass—fiber filtered water at 6.78 (4) twice filtered XJV-treated water at pH 6.78, first filtration by glass-fiber prior to UV-irradiation, second filtration by membrane (0.2fxm nuclepore) after irradiation. Model curves through data points were calculated according to stability constants determined in this work (Tables I and II). Dotted lines indicate limits on data used for calculation of conditional stability constants for organic binding.

UV-treatment of filtered Neuse River water also caused a large decrease in the binding of copper at pH 6.78 and pCCujot]... 

Figure 9. Relationship between the log of the conditional stability constant and the log of the binding site concentration per gram dissolved organic carbon for individual binding sites. Newport River pH 8.00 ( ) Neuse River pH 8.00 (O) Newport River pH 7.00 (%) Neuse River pH 6.78 (A) Newport River pH 5.95 (A) water fio).

Figure 11. Chemical speciation model for dissolved copper in the Neuse River at 25°C as a function of total copper concentration, (a) In situ pH 6.78, [Aik] = O.lSmU and I = 0.0005M and (h) pH 8.00, [Aik] = 0.65mM and I = O.OOIM.

Figure 15. Chemical speciation model for dissolved copper in the Neuse River at 25°C as a function of carbonate alkalinity at p[Cutot] 7...

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