摘要
为研究柄海鞘对重金属Zn2+的生物富集作用,应用半静态双箱式生物富集动力学模型,通过非线性拟合得到相应的生物富集动力学参数.实验结果表明:柄海鞘对金属Zn2+具有一定的富集作用,对Zn2+的富集吸收速率常数k1和富集系数FBC均随外部水体中Zn2+质量浓度的增大而减小.富集平衡时,海鞘体内的锌含量(QAmax)与外部水体中Zn2+的质量浓度基本成正相关.柄海鞘不同器官中锌的质量浓度不同,依次为:生殖腺>消化腺>其他部分>外背囊.排出阶段锌在柄海鞘体内的生物学半衰期(B1/2)为11.36～23.98d.柄海鞘的生殖腺可蓄积大量的Zn2+,消化腺可较准确地反映海水中的Zn2+污染状况.
Based on the semi-static two compartment model, the bioaccumulation and elimination of zinc by tissues of Styela clava were investigated, the kinetic parameters of accumulation rate constant k i, elimination rate constant k 2, bioconcentration factor F Bc, biological half life B 1/2 and the maximum equilibrium concentration QAmax were obtained by non-linear regression. The results show that zinc can be accumulated by S. clava from aquatic environment. F Bc decreases with the increasing metal concentration in water, and when the accumulation achieves balance, QAmax SHOWS positive correlation to metal concentrations in water. Concentrations of zinc in different tissues of S. clara are listed as： gonad 〉 digestive gland 〉 other part 〉 crust. B 1/2 of zinc is 11.36 -23.98 d in the phase of elimination. Zn can be accumulated in gonad of S. clava largely and the digestive gland can be used to monitor the pollution of zinc in sea water.
出处
《哈尔滨工业大学学报》
EI
CAS
CSCD
北大核心
2010年第2期328-332,336,共6页
Journal of Harbin Institute of Technology
基金
国家高技术研究发展计划资助项目(2001AA620416)
农业部渔业生态环境重点开放实验室开放基金资助项目
关键词
柄海鞘
生物富集
排出
动力学
双箱式模型
锌
Styela clava
accumulation
elimination
kinetics
two-compartment model
zinc
