Dynamics and fate of TCCA in a simulated micro-cosmos system
ZHOU Xiao-zhi1, CHEN Ju-fang1, NIE Xiang-ping2, JIANG Tian-jiu1
1. Environmental Engineering Department of Jinan University, Guangzhou 510632, China; 2. Institute of Hydrobiology, Jinan University, Guangzhou 510632, China
Distribution, accumulation and transfer dynamics of TCCA in water, sediments, and biota in a simulated micro-cosmos system were studied by HPLC. The results showed that once TCCA was released into water body, some were hydrolyzed in aqueous solutions; some were assimilated by aquatic organisms or precipitated into sediments. There were differences in distribution, accumulation and transfer dynamics of TCCA among different aquatic organisms. Echinodorus amazonicus adsorbed TCCA mainly by its leaf instead of its roots and reached to an equilibrium quickly; Allogynogenetic crucian carp and Corbicula fluminea had obvious ability to accumulate TCCA, which could retain in these organisms for a long time. Significant differences of TCCA bioaccumulation existed between visceral and muscle, and higher concentration of TCCA was found in visceral tissues. It was found that bioaccumulations of TCCA varied with species, and the order was Echinodorus amazonicus>Corbicula fluminea>Allogynogenetic crucian carp.
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