Copper and silver interactions at various exposure levels in a marine copepod, Acartia erythraea
Copper and silver interactions at various exposure levels in a marine copepod, Acartia erythraea作者机构：LED Laboratory South China Sea Institute of Oceanology Chinese Academy of Sciences Guangzhou 510301 China Graduate School Chinese Academy of Sciences Beoing 100039 China Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou 510640 China
出 版 物：《Journal of Environmental Science and Engineering》 (环境科学与工程（英文版）)
年 卷 期：2009年第3卷第1期
页 面：42-51页
学科分类：0710[理学-生物学] 081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 070301[理学-无机化学] 071002[理学-动物学]
主 题：copepods copper effiux rate constant silver uptake rate constant
摘 要：Marine copepods, Acartia erythraea, were exposed separately to aqueous Cu and Ag media and to a Cu＋Ag mixture in a series of experiments during which the metal body burden and partitioning in the exoskeleton and polar and nonpolar parts of the animal cells were measured and the uptake and effiux rate constants for Cu and Ag were calculated. The metal uptake and effiux rate constants were 1.04×10^3±1.00×10^2 L·g^-1·d^-1 and 9.28× 102＋ 1.43×10-2 d^-1 for Cu and 1.60× 104＋1.78×10^3L·g^-1·d^-1and 9.23×10^2 -4- 9.1 1×10^3d^-1 for Ag, respectively. For both Cu and Ag, the uptake rate constants when the copepods were exposed to solutions of a single metal were generally higher than that when the copepods were exposed to metal mixtures. The results suggest an antagonistic interaction between waterborne Cu and Ag exists in marine copepods. The different distributions of Cu and Ag among the exoskeleton and polar and nonpolar parts of the copepods revealed that the metal bioavailability in copepods exposed to metal mixtures enhanced in some degree compared to copepods exposed to single metal solutions.
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