Sublethal Effects of Chlorine-Free Kraft Mill Effluents on Daphnia magna

The implementation of elemental chlorine-free (ECF) bleaching methods has drastically reduced the aquatic toxicity of Kraft mill effluents during the last decade. However, the residual toxicity of Kraft mill effluents is still a potential concern for the environment, even when subjected to secondary...

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Bibliographic Details
Published in:Bulletin of environmental contamination and toxicology 2016-12, Vol.97 (6), p.843-847
Main Authors: Chamorro, Soledad, López, Daniela, Brito, Pablina, Jarpa, Mayra, Piña, Benjamin, Vidal, Gladys
Format: Article
Language:English
Subjects:
Animals
Aquatic Pollution
Biological Assay
Bleaching
Chlorine
Daphnia - drug effects
Daphnia - growth & development
Daphnia magna
Dose-Response Relationship, Drug
Earth and Environmental Science
Ecotoxicology
Effluents
Environment
Environmental Chemistry
Environmental Health
Feeding Behavior - drug effects
Industrial wastewater
Kraft mills
Life history
Plankton
Pollution
Pulp & paper mills
Pulp wastes
Secondary wastewater
Secondary wastewater treatment
Soil Science & Conservation
Sublethal effects
Toxicity
Waste Water - toxicity
Waste Water Technology
Water Management
Water pollution
Water Pollution Control
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Summary:The implementation of elemental chlorine-free (ECF) bleaching methods has drastically reduced the aquatic toxicity of Kraft mill effluents during the last decade. However, the residual toxicity of Kraft mill effluents is still a potential concern for the environment, even when subjected to secondary wastewater treatment. The aim of this study is characterize potential sublethal effects of ECF Kraft mill effluents using Daphnia magna as model species. D. magna exposed towards increasing concentration of ECF Kraft mill effluent showed a significant, dose-dependent reduction in feeding. Conversely, post-feeding assay, life history, and allometric growth analyses showed stimulatory, rather than inhibitory effects in exposed animals at low concentrations, while high concentrations of ECF Kraft mill effluents reduced their reproductive output. These results suggest a hormetic effect in which moderate concentrations of the effluent had a stimulatory effect with higher concentrations causing inhibition in some variables.
ISSN:0007-4861
1432-0800
DOI:10.1007/s00128-016-1936-y