INIS Repository Search - Single Result

META

Effects of nitrate addition on phosphorus retention in an eutrophic reservoir : laboratory experiments

Yamada, T.; Janke, H.; Colzato, M.; Beraldo, D.; Mozeto, A.; Botta, C.; Nascimento, M.
Proceedings of the 36. annual aquatic toxicity workshop2010

Citation
Export

AbstractAbstract

[en] The Ibrite reservoir in southeast Brazil is polluted with effluents from an oil refinery as well as domestic untreated sewage from cities in the region. In this study, calcium nitrate was used as a sediment remediation technology in order to reduce phosphorus availability. Experiments were conducted in microcosms incubated for up to 135 days. Ceriodaphnia silvestrii and Vibrio fisheri were used to conduct an acute toxicity assessment of the water column and pore water of the sediments. Chironomus xanthus was used to assess bulk sediments. Results of the chemical analyses showed that high values of acid volatile sulfide in the sediments decreased by 99 per cent after 135 days of incubation. Approximately 50 per cent of the soluble reactive phosphorus was removed from the water column. The toxicity of the tested organisms was attributed to high nitrate concentrations in pore water sediments. Results indicated that calcium nitrate is not suitable as a sediment remediation technology.

Primary Subject

ENVIRONMENTAL SCIENCES (S54)

Secondary Subject

PETROLEUM (S02)

Source

Martel, L.; Triffault-Bouchet, G. (Centre d'expertise en analyse environnementale du Quebec, Quebec, PQ (Canada)); Fournier, M. (Inst. national de la recherche scientifique, Laval, PQ (Canada). Inst. Armand Frappier); Berryman, D.; Guay, I. (Ministere du Developpement durable, de l'Environnement et des Parcs, Quebec, PQ (Canada)); Campbell, P.G.C. (Quebec Univ., Quebec, PQ (Canada). Institut National de la Recherche Scientifique-Eau, Terre et Environnement); Lebeuf, M.; Couillard, C. (Fisheries and Oceans Canada, Mont-Joli, PQ (Canada). Inst. Maurice-Lamontagne); Parent, L. (Quebec Univ., Montreal, PQ (Canada)); Pellerin, J. (Quebec Univ., Rimouski, PQ (Canada). Institut des Sciences de la Mer de Rimouski); Benoit, P. (Ministere du Developpement durable, de l'Environnement et des Parcs du Quebec, Longueil, PQ (Canada)); Lacroix, E. (Environment Canada, Montreal, PQ (Canada)); Burridge, L.E. (Fisheries and Oceans Canada, St. Andrews, NB (Canada)) (eds.); Fisheries and Oceans Canada, St. Andrews, NB (Canada). Biological Station. Funding organisation: Ministere du Developpement durable, de l'Environnement et des Parcs, Quebec, PQ (Canada); Environment Canada, Gatineau, PQ (Canada); Quebec Univ., Rimouski, PQ (Canada). Centre interinstitutionnel de recherche en ecotoxicologie; Hydro-Quebec, Montreal, PQ (Canada); ExxonMobil, St. John's, NL (Canada); Rio Tinto, Canadian Exploration Ltd., Toronto, ON (Canada); Alcan International Ltd., Montreal, PQ (Canada); Vale Inco Ltd., Sudbury, ON (Canada); Quebec Univ., Montreal, PQ (Canada). Centre TOXEN; Institut national de sante publique du Quebec, Montreal, PQ (Canada); Degremont, Dorval, PQ (Canada); Paine, Ledge and Associates, North Vancouver, BC (Canada); Quebec Univ., Quebec, PQ (Canada). Institut National de la Recherche Scientifique-Eau, Terre et Environnement; Intrinsik, Ottawa, ON (Canada) (and others); 200 p; 2010; p. 133; 36. annual aquatic toxicity workshop; La Malbaie, PQ (Canada); 27-30 Sep 2009; ISSN 0706-6457;