简报
谭渝云,孙美娟.大型瑵HB对五氯苯酚的富集与释放动力学研究[J].环境科学学报,1994,14(1):123-128
大型瑵HB对五氯苯酚的富集与释放动力学研究
- KIHETICS OF BIOCONCENCENTRATION AND ELI-MINATION OF PENTACHLOROPHENOL BY DAPHNIA M AGNA HB
- 摘要：五氯苯酚(PCP)是一种应用十分广泛的杀虫剂和防腐剂, Detrick报道了世界上PCP每年施用量约为9*104t.
- Abstract：The kinetics of bioconcentration and elimination of-labelled pentachlo-rophenol(-PCP)were investigated in Daphnia magna HB over a period of 48 hr.at water temperature of 20°And 14°.The D.magna was exposed to a dose of 0.03 mg/L water solution.-PCP content was analyzed by li-quid scintillation counter.With increasing exposed time the uptake rate of PCP by D. magna increased drastically.After 12 h of exposure, PCP biocon-centration factors(BCF)reached peak value.The BCF of PCP of D.mag-na in apparent steady-state was 35, and bioconcentration rate constants was 0.1 48.The elimination of PCP from D.magna to water followed second-or-der reaction kinetics.It was found that a linear relationship exists between the reciprocal of the PCP residue in D.magnat release time and depuration time itself.The half-life and the rate constant(K_Ⅱ)were 5.9h and 0.157 for 20℃, 10.6h and 0.112 for 14℃, respectively.
- Key words：daphnia bioconcentration elimination PCP.
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