A Model Describing the Time Course and Variability in Toxicity of Hydrophobic Chemicals to

A Model Describing the Time Course and Variability in Toxicity of Hydrophobic Chemicals to

Aquatic Organisms-Toxicity of chlorinated

benzenes to marine algae

WANG Xiulin;SHAN Baotian;GE Ming;ZHANG Lei;ZHU Chenjian;HAN Xiurong

【期刊名称】《中国海洋大学学报（英文版）》 【年(卷),期】2002(001)001

【摘要】The growth of Chlorella marine, Nannochloris oculate, Pyramimonaos sp., Platymonas subcordiformis and Phaeodactylum tricornutum exposed to chlorobenzene, 1,2-dichlorobenzene, 1, 2, 3, 4-tetrachlorobenzene and pentachlorobenzene was tested. The Boltzman equation was used to describe organism growth. The time course for uptake of hydrophobic organic chemicals (HOCs) by aquatic organisms was expressed by incorporating growth and, if desired, the effect of metabolism into the HOC bioconcentration process. The probability of any given concentration of HOCs in the organisms causing a specified toxic endpoint was expressed with a modified Weibull distribution function. The combined bioconcentration and probability equations were tested with data for time course of incubation of algae exposed to chlorinated benzenes (CBs). A set of parameters, including the uptake rate constant k1, the elimination rate constant k2 and thereafter the bioconcentration factor on a dry weight basis, BCFD, the critical HOC