Method Development for Determining the Removal of Metals from the Water Column under Transformation/Dissolution Conditions for Chronic Hazard Classification
Autor: | Richard F. Carbonaro, Kevin J. Rader, Michelle Hudson, G. Allen Burton, Philippa Huntsman, Emily R. Garman, Robert Beaudoin, Stijn Baken, Hugo Waeterschoot |
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Rok vydání: | 2019 |
Předmět: |
0106 biological sciences
Health Toxicology and Mutagenesis chemistry.chemical_element Zinc 010501 environmental sciences 01 natural sciences Hazardous Substances Metal Water column Settling Environmental Chemistry Dissolution 0105 earth and related environmental sciences Chemistry 010604 marine biology & hydrobiology Water Cobalt Hydrogen-Ion Concentration Substrate (marine biology) Kinetics Nickel Solubility Metals Strontium Environmental chemistry visual_art visual_art.visual_art_medium Water quality Copper |
Zdroj: | Environmental Toxicology and Chemistry. 38:2032-2042 |
ISSN: | 1552-8618 0730-7268 |
Popis: | An extension of the transformation/dissolution protocol (T/DP) was developed and evaluated as a tool to measure the removal of metals from the water column for chronic aquatic hazard classification. The T/DP extension (T/DP-E) consists of 2 parts: T/DP-E part 1, to measure metal removal from the water column via binding of metals to a substrate and subsequent settling, and T/DP-E part 2, to assess the potential for remobilization of metals following resuspension. The T/DP-E methodology (672-h [28-d] removal period, 1-h resuspension event, and 96-h resettling period) was tested using Cu, Co, and Sr solutions in the presence of a substrate. The metal removal rates varied from rapid removal for Cu to slower rates of removal for Co and Sr. The resuspension event did not trigger any increase in dissolved Cu, Co, or Sr. Additional 96-h experiments were conducted using dissolved Ni, Pb, Zn, and Ag and supported the conclusion that the T/DP-E is sufficiently robust to distinguish removal rates between metals with a wide range of reactivities. The proposed method provides a means to quantify the rate of metal removal from the water column and evaluate remobilization potential in a standardized and reliable way. Environ Toxicol Chem 2019;38:2032-2042. © 2019 SETAC. |
Databáze: | OpenAIRE |
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