Effects of urban dissolved organic matter from wastewater treatment plant and anthropized river on speciation and toxicity of copper to Daphnia magna (Strauss)
The combination of reverse osmosis (RO) concentration and DAX 8/XAD-4 resin adsorption techniques was used to isolate the different constituents of urban Dissolved Organic Matter (DOM). Three fractions: hydrophobic (HPO), transphilic (TPH) and hydrophilic (HPI) were isolated from discharge of the major French wastewater treatment plant (WWTP) and Seine River (upstream and downstream from Paris). After chemical characterization (elemental, spectroscopic and chromatographic anaiysis) of each organic fraction, a simple acute toxicity test on Daphnia magna was carried out to evaluate the copper bioavaiiability in presence of each organic fraction. Results highlight the key role of Non Humic Substances (NHS) concerning copper bioavailability. Furthermore copper interactions with Humic Substances (HS) and NHS are investigated using electrochemical method (stripping chronopotentiometry) and DGT measurements and have shown significant differences according to the DOM fraction nature and the sample origin.
bioavailability copper Daphnia magna dissolved organic matter speciation toxicity
B. Pernet-Coudrier G. Varrault M. H. Tusseau-Vuillemin J. M. Mouchel
CEREVE, Universite Paris 12, 61 avenue du General De Gaulle, 94010 Creteil Cedex, France Cemagref-Unite QHAN, Parc de Tourvoie, BP 44, 92163 Anthony Cedex, France
国际会议
第九届痕量元素生物地球化学国际会议(9th International Conference on the Biogeochemistry of Trace Elements)
北京
英文
790-791
2007-07-15（万方平台首次上网日期，不代表论文的发表时间）