Sures Bernd, Zimmermann Sonja
Department of Applied Zoology/Hydrobiology, University of Duisburg-Essen, D-45177 Essen, Germany.
Environ Pollut. 2007 Mar;146(2):444-51. doi: 10.1016/j.envpol.2006.07.004. Epub 2006 Oct 2.
Zebra mussels (Dreissena polymorpha) were exposed to different types of water containing PGE salts (PtCl4, PdSO4, RhCl3) to investigate the influence of humic substances on the aqueous solubility, uptake and bioaccumulation of noble metals. The results showed a time dependent decrease of the aqueous PGE concentrations in tank water for all groups. This could mainly be related to non-biological processes. The aqueous solubility of Pd and Rh was higher in humic water compared with non-chlorinated tap water, whereas Pt showed opposing results. Highest metal uptake rates and highest bioaccumulation plateaus were found for Pd, followed by Pt and Rh. Pd uptake and bioaccumulation was significantly hampered by humic substances, whose presence appear to increase Pt uptake and bioaccumulation. No clear trend emerged for Rh. Differences in effects of humic matter among the PGE may be explained by formation of metal complexes with different fractions of humic substances.
将斑马贻贝（多形饰贝）暴露于含有铂族元素（PGE）盐（四氯化铂、硫酸钯、三氯化铑）的不同类型水中，以研究腐殖质对贵金属在水中的溶解度、摄取和生物累积的影响。结果表明，所有组的水族箱水中PGE浓度均随时间下降。这主要可能与非生物过程有关。与未氯化的自来水相比，腐殖质水中钯和铑的水溶性更高，而铂的结果则相反。钯的金属摄取率最高，生物累积平台也最高，其次是铂和铑。腐殖质显著阻碍了钯的摄取和生物累积，而腐殖质的存在似乎增加了铂的摄取和生物累积。铑没有明显的趋势。PGE之间腐殖质影响的差异可能是由于与腐殖质不同部分形成金属络合物所致。
