Using XAD resins to study the effects of reduced organic micropollutant concentrations in River Rhine and Meuse water on phytoplankton growth
- 38 Downloads
Laboratory incubation experiments were used to study the effect of reduced concentrations of organic micropollutants in water from the rivers Rhine and Meuse on the specific growth rate of the river phytoplankton community. Before incubation, part of the water sampled was treated with XAD-4 and XAD-8 resins to absorb dissolved organic compounds. Four dilutions were made by mixing untreated water with XAD-treated water in the ratios 100:0 (control), 70:30, 40:60 and 0:100. The phytoplankton specific growth rate increased significantly with the increased fraction treated with XAD in all but one incubation experiment. In these experiments, the specific growth rate was on average 9% higher in the fraction in which 100% was treated with XAD than in the controls. In the Rhine and Meuse river water, phytoplankton growth seemed to be inhibited by organic compounds. This inhibition was ascribed to the presence of dissolved organic micropollutants. Removing organic micropollutants using XAD resins to study the toxic effects of these compounds on field phytoplankton communities can be concluded to be a promising tool for risk assessment of micropollutants but needs to be supported by additional methodological research.
Keywordsphytoplankton specific growth rate XAD-4 XAD-8 risk assessment
Unable to display preview. Download preview PDF.
- BURCHILL, P., A.A. HEROD, K.M. MARSH, C.A. PIRT and E. PRITCHARD, 1993. Gas chromatography in water analysis-I. Wat. Res., 17: 1891–1903.Google Scholar
- FALKOWSKI, P.G. and T.G. OWENS, 1980. Light-shade adaptation, two strategies in marine phytoplankton. Plant Physiol., 66: 592–595.Google Scholar
- NOORDSIJ, A., J. VAN BEVEREN and A. BRANDT, 1983. Isolation of organic compounds from water for chemical analysis and toxicological testing. Intern. J. Environ. Anal. Chem., 13: 205–217.Google Scholar
- NUSCH E.A. and G. PALME, 1975. Biologische Methoden für die Praxis der Gewässeruntersuchung. Gwf Wasser/Abwasser, 116: 562–565.Google Scholar
- PRAKASH, A. and M.A. RASHID, 1968. Influence of humic substances on the growth of marine phytoplankton: dinoflagellates. Limnol. Oceanogr., 13: 598–606.Google Scholar
- PRAKASH, A., M.A. RASHID and D.V. SUBBA RAO, 1973. Influence of humic substances on the growth of marine phytoplankton: diatioms. Limnol. Oceanogr., 18: 516–524.Google Scholar
- SOKAL, R.R. and F.J. ROHLF, 1981. Biometry. W.H. Freeman, San Francisco, 859 pp.Google Scholar
- STEWART, A.J. and R.G. WETZEL, 1982. Influence of dissolved humic materials on carbon assimilation and alkaline phosphatase activity in natural algal-bacterial assemblages. Freshwater Biol., 12: 369–380.Google Scholar
- TUBBING, G.M.J., D. DE ZWART and T. BRGER-WIERSMA, 1995. Phytoplankton dynamics in the River Meuse as affected by pollution. Neth. J. Aquat. Ecol. 29: 103–116.Google Scholar