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2002 | 44 | 3 |

Tytuł artykułu

The significance of dissolved organic matter photodegradation as a source of ammonium in natural waters

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Treść / Zawartość

Warianty tytułu

Języki publikacji

EN

Abstrakty

EN
Samples of sea, river and pond water of different absorbance were exposed to artificial radiation resembling sunlight in the UV range. A statistically significant increase in ammonium concentration was detected in pond water of the highest absorbance after 5 h of irradiation. In sea and river water a corresponding increase (< 0.5 μM) was recorded after an exposure time of 25 hours. The bulk characteristics of the analysed samples were insufficient to explain the observed differences.

Wydawca

-

Czasopismo

Rocznik

Tom

44

Numer

3

Opis fizyczny

p.355-365,fig.,ref.

Twórcy

  • University of Gdansk, al.Marszalka Pilsudskiego 46, 81-378 Gdynia, Poland

Bibliografia

  • Bertilsson S., Stepanauskas R., Cudaros-Hansson R., Granelli W., Wikner J., Tranvik L., 1999, Photochemically induced changes in bioavailable carbon and nitrogen pools in a boreal watershed, Aquat. Microbiol. Ecol., 19, 47–56.
  • Bushaw K. L., Zepp R.G., Tarr M. A., Schulz-Janders D., Bourbonniere R.A., Hodson R. E., Miller W. L., Bronk D.A., Moran M.A., 1996, Photochemical release of biologically available nitrogen from dissolved matter, Nature, 381, 404–407.
  • Bushaw-Newton K.L., Moran M.A., 1999, Photochemical formation of biologically available nitrogen from aquatic humic substances, Aquat. Microbiol. Ecol., 18, 285–292.
  • Gao H., Zepp R.G., 1998, Factors influencing photoreactions of dissolved organic matter in a coastal river of the southeastern United States, Environ. Sci. Technol., 32, 2940–2946.
  • GardnerW. S., Cavaletto J.F., Bootsma H.A., Lavrentyev P. J., Troncome F., 1998, Nitrogen cycling rates and light effects in tropical Lake Maracaibo Venezuela, Limnol. Oceanogr., 43 (8), 1814–1825.
  • Graneli W., Lindell M., Tranvik L., 1996, Photo-oxidative production of dissolved organic carbon in lakes of different humic content, Limnol. Oceanogr., 41, 698–706.
  • Grasshoff K., EhrhardtM., Kremling K., 1983, Methods of seawater analysis, Verlag Chem., Weinheim, 419 pp.
  • Jorgensen N.O., Tranvik G. L., Edling H., Graneli W., Lindell M., 1998, Effects of sunlight on occurrence and bacterial turnover of specific carbon and nitrogen compounds in lake water, FEMS Microbiol. Ecol., 25, 217–227.
  • Koopmans D. J., Bronk D.A., 2002, Photochemical production of dissolved inorganic nitrogen and primary amines from dissolved organic nitrogen in waters of two estuaries and adjacent surficial groundwaters, Aquat. Microbiol. Ecol., 26 (3), 295–304.
  • Pastuszak M., 1995, The hydrochemical and biological impact of the river Vistula on the pelagic system of the Gulf of Gdańsk in 1994. Part 1. Variability in nutrient concentrations, Oceanologia, 37 (2), 181–205.
  • Wang W., Tarr M.A., Bianchi T. S., Engelhaupt E., 2000, Ammonium photoproduction from aquatic humic and colloidal matter, Aquat. Geochem., 6, 275–292.
  • Wiegner T.N., Seitzinger S.P., 2001, Photochemical and microbial degradation of external dissolved organic matter inputs to rivers, Aquat. Microbiol. Ecol., 24, 27–40.

Typ dokumentu

Bibliografia

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