红纺锤水蚤(Acartia erythraea)对Cu(上标 2+)和Ag(上标 +)的吸收

Marine copepods, Acartia erythraea, were exposed to waterborne copper, silver, and copper and silver mixture respectively in a series experiment during which the metal contents in exoskeleton, polar and nonpolar parts in animal cells were measured and the uptake rate, efflux rate constant for Cu(superscript 2+) and Ag(superscript +) were calculated. The metal uptake rate, efflux rate constants were 1.09×10^4 L•g^(-1)•d^(-1), 0.096 d^(-1) for Cu(superscript 2+), 3.31×10 L•g^(-1)•d^(-1), 0.1056 d^(-1) for Ag(superscript +) respectively when copepods were exposed to single Cu(superscript 2+) or Ag(superscript +) solution. Their counterparts in Cu(superscript 2+)+Ag(superscript +) mixture exposure experiments decreased to 9.17×10^3 L•g^(-1)•d^(-1), 0.084 d^(-1) for Cu(superscript 2+), 2.87×10^4 L•g^(-1)•d^(-1), 0.1008 d ^(-1)for Ag(superscript +) respectively. The measuring and kinetics modeling results suggested the antagonism interaction between waterborne Cu(superscript 2+) and Ag(superscript +) exits in marine copepods. The different distribution of Cu(superscript 2+) and Ag(superscript +) among exoskeleton, polar and nonpolar parts in copepods revealed that the metal bioavailability in copepods exposed to metal mixture increased in some degree compared to their counterparts exposed to single metal solution.