Determination of toxicokinetic parameters for bioconcentration of water-soluble fraction of petroleum hydrocarbon associated with No. 0 Diesel in Changjiang estuary and Jiaozhou Bay: Model versus mesocosm experiments

被引：0
作者：
Wang X. [1 ]
Zhang J. [1 ]
Shi X. [1 ]
Zhu C. [1 ]
An Y. [1 ]
Jun S. [1 ]
Li R. [2 ]
Zhu M. [2 ]
Chen S. [2 ]
机构：
[1] School of Chemistry and Chemical Engineering, Ocean University of Qingdao, Qingdao 266003
[2] First Institute of Oceanography, SOA, Qingdao 266061
来源：
Archives of Environmental Contamination and Toxicology | 2002年 / 42卷 / 3期
关键词：
Phytoplankton; Diesel; Microbial Degradation; Petroleum Hydrocarbon; Vinyl Acetate;
D O I：
10.1007/s00244-001-0025-2
中图分类号：
学科分类号：
摘要：
A method is proposed for determination of toxico-kinetic parameters for bioconcentration by phytoplankton of the water-soluble fraction (WSF) of petroleum hydrocarbon (PH) associated with No. 0 diesel, in which WSF-PH concentration in phytoplankton cells, CA(d), is estimated by subtracting concentration in water (S-bottle) containing a phytoplankton sample from that in a C-bottle without phytoplankton. It was demonstrated that CA(d) agrees well with the concentration found by direct ultrasonication extraction of collected cells, CA(ind) (r = 0.88, p < 0.0001), and its uncertainty was about 17.6%. Mesocosms in 25-m3 ethylene vinyl acetate or 4-m3 polyethylene bags were performed at two sites in China: Changjiang Estuary in spring/summer 1998 and Jiaozhou Bay in autumn 1999 and spring/summer 2000. The experiments were designed to determine toxicokinetic parameters, including specific rates of uptake and elimination, and bioconcentration factor (BCF), for bioconcentration of WSF-PH by phytoplankton. A modified kinetic two-compartment model for bioconcentration of WSF-PH by phytoplankton was developed to estimate the toxicokinetic parameters. In the model, the influence of phytoplankton growth on bioconcentration and WSF-PH decline due to biotic and abiotic processes other than bioconcentration, such as volatilization, microbial degradation, phytolysis, and sorption expressed as an exponential-decay equation, are taken into account. Size-dependent BCF was observed in the laboratory experiment. BCFs were 1.0 × 104 in summer in Changjiang Estuary, 1.6 × 104 in summer, and 1.1 × 104 in autumn in Jiaozhou Bay. The difference in BCF may be interpreted by its size dependence.
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页码：272 / 279
页数：7
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