| Bioconcentration kinetics of PCBs in various parts of the lifecycle of the tadpoles Xenopus laevis | |
| Alternative Title | Bioconcentration kinetics of PCBs in various parts of the lifecycle of the tadpoles Xenopus laevis |
| Zhao Rongbiao1; Sun Dayu1; Fu Shan1; Wang Xiaofei1; Zhao Rusong1 | |
| 2007 | |
| Source Publication | JOURNAL OF ENVIRONMENTAL SCIENCES
 |
| ISSN | 1001-0742 |
| Volume | 19Issue:3Pages:374-384 |
| Abstract | Polychlorinated biphenyls (PCBs) in Xenopus laevis have been reported only for a few congeners. Additionally, there is very little information on the ability of Xenopus laevis to bioconcentrate PCBs. To address these issues, the tadpole Xenopus laevis was exposed to Aroclor1254 mixtures in water at room temperature for 110 d followed by an additional 110 d of nonspiked PCBs in the water for the control group. During the whole process, bioconcentration factors (BCFs) of PCBs ranged from 1180 to 15670. For most PCB congeners, the highest and lowest bioconcentrations of the kinetic curves were found to be remarkably simultaneous, respectively. All 141 PCB congeners under the same experimental conditions had no linear correlation on the 1gBCF versus 1gK(ow) relationship. The relationship between 1gBCFs and 1gK(ow) followed a parabolic pattern indicative of selective bioconcentration, suggesting that the kinetic curves of the PCB congeners observed in the lifecycle of the tadpoles may be concentrated due to the amphibian special species and internal metabolism. In contrast, 1gBCFs for PCBs were inversely related to 1gK(ow), suggesting that a metabolism of the higher K-ow' PCB congeners occurred. These results support the author's conclusion that the tadpole Xenopus laevis plays major roles in the bioconcentration of PCB congeners, and demonstrated that the exposure kinetic curves of PCB congeners are complex. Besides the amphibian metamorphous development, the lifecycle of the tadpole Xenopus laevis also may be of importance in determining the bioconcentration of PCB congeners. |
| Other Abstract | Polychlorinated biphenyls (PCBs) in Xenopus laevis have been reported only for a few congeners. Additionally, there is very little information on the ability of Xenopus laevis to bioconcentrate PCBs. To address these issues, the tadpole Xenopus laevis was exposed to Aroclor1254 mixtures in water at room temperature for 110 d followed by an additional 110 d of nonspiked PCBs in the water for the control group. During the whole process, bioconcentration factors (BCFs) of ∑PCBs ranged from 1180 to 15670. For most PCB congeners, the highest and lowest bioconcentrations of the kinetic curves were found to be remarkably simultaneous, respectively. All 141 PCB congeners of the same experimental conditions had no linear correlation on the lgBCF versus lgKow relationship. The relationship between lgBCFs and lgKow followed a parabolic pattern indicative of selective bioconcentration, suggesting that the kinetic curves of the PCB congeners observed in the lifecycle of the tadpoles may be concentrated due to the amphibian special species and internal metabolism. In contrast, lgBCFs for PCBs were inversely related to lgKow, suggesting that a metabolism of the higher Kow’ PCB congeners occurred. These results support the author’s conclusion that the tadpole Xenopus laevis plays major roles in the bioconcentration of PCB congeners, and demonstrated that the exposure kinetic curves of PCB congeners are complex. Besides the amphibian metamorphous development, the lifecycle of the tadpole Xenopus laevis also may be of importance in determining the bioconcentration of PCB congeners. |
| Keyword | PERSISTENT ORGANIC CONTAMINANTS RAINBOW-TROUT POLYCHLORINATED-BIPHENYLS LAKE-ERIE BENTHIC INVERTEBRATES DREISSENA-POLYMORPHA DIETARY ACCUMULATION FATHEAD MINNOWS HUMAN HEALTH HONG-KONG PCBs tadpole Xenopus laevis bioconcentration exposure kinetics |
| Indexed By | CSCD |
| Language | 英语 |
| CSCD ID | CSCD:2670877 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/156518 |
| Collection | 中国科学院金属研究所 |
| Affiliation | 1.中国科学院 2.中国科学院金属研究所 |
| Recommended Citation GB/T 7714 | Zhao Rongbiao,Sun Dayu,Fu Shan,et al. Bioconcentration kinetics of PCBs in various parts of the lifecycle of the tadpoles Xenopus laevis[J]. JOURNAL OF ENVIRONMENTAL SCIENCES,2007,19(3):374-384. |
| APA | Zhao Rongbiao,Sun Dayu,Fu Shan,Wang Xiaofei,&Zhao Rusong.(2007).Bioconcentration kinetics of PCBs in various parts of the lifecycle of the tadpoles Xenopus laevis.JOURNAL OF ENVIRONMENTAL SCIENCES,19(3),374-384. |
| MLA | Zhao Rongbiao,et al."Bioconcentration kinetics of PCBs in various parts of the lifecycle of the tadpoles Xenopus laevis".JOURNAL OF ENVIRONMENTAL SCIENCES 19.3(2007):374-384. |
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