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Sorption of isoflavones to river sediment and model sorbents and outcomes for larval fish exposed to contaminated sediment
- Source :
- Journal of Hazardous Materials. 282:26-33
- Publication Year :
- 2015
- Publisher :
- Elsevier BV, 2015.
-
Abstract
- Isoflavones are compounds whose presence in the aquatic environment is increasingly recognized and may be of concern due to their potential to act as endocrine disruptors. Sorption to particles may be a relevant removal mechanism for isoflavones. This work investigated the influence of pH, ionic strength, and sediment composition on sorption of genistein and daidzein, two key isoflavones, using sorption isotherms and edges. The effect of sorbed isoflavones on the survival, growth, and predator avoidance performance of larval fathead minnows (Pimephales promelas) was assessed. Sorption to goethite and kaolinite was pH-dependent, with a maximum near pH 7 for both compounds. Sorption to montmorillonite was ionic-strength dependent but largely pH-independent. Overall, sorption to sediments is likely to sequester less than 5% of isoflavones in a discharge. No statistically significant effects were observed for larvae exposed to sorbed isoflavones, suggesting that sorption to sediments reduces exposure to isoflavones.
- Subjects :
- Geologic Sediments
Environmental Engineering
Goethite
Health, Toxicology and Mutagenesis
Cyprinidae
Genistein
chemistry.chemical_compound
Rivers
Escape Reaction
Animals
Environmental Chemistry
Kaolinite
Kaolin
Waste Management and Disposal
Minerals
Osmolar Concentration
Daidzein
Sediment
Sorption
Hydrogen-Ion Concentration
Isoflavones
Pollution
chemistry
Larva
visual_art
Environmental chemistry
Bentonite
visual_art.visual_art_medium
Phytoestrogens
Adsorption
Iron Compounds
Water Pollutants, Chemical
Subjects
Details
- ISSN :
- 03043894
- Volume :
- 282
- Database :
- OpenAIRE
- Journal :
- Journal of Hazardous Materials
- Accession number :
- edsair.doi.dedup.....93f36ceb240ff9aeb43d33b4aba4a189