湖泊沉积物中磷化氢的释放动力学初探
A PRELIMINARY STUDY ON RELEASE KINETICS OF PHOSPHINE IN LAKE SEDIMENTS
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摘要: 采用柱状芯样模拟法,研究了太湖沉积物-水界面磷化氢的释放动力学.结果表明:当沉积物-水界面磷化氢的释放达到动态平衡时,水界面中磷化氢的浓度基本不再增大,大约在0.34pg·l-1左右,此时磷化氢的释放通量约为0.008pg·dm-2·h-1.根据室内模拟结果,太湖沉积物每年的磷化氢释放量在13.81—49.62g之间,从而使磷化氢在湖水中的平均浓度达到0.16pmol·l-1.Abstract: Release kinetics of phosphine in Taihu lake sediments is investigated with columnar simulation method. The results showed the sediments water interface obtains one dynamical equilibrium, the concentrations of phosphine in water interface about is 0.34 pg·l-1, the release flux is approximately in 0.008 pg·dm-2·h-1. According to the lab result,As calculated that the released quantity of phosphine all year from sediments in Taihu lake is between 13.81-49.62 g, and the average concentration of phosphine in lake water may be up to 0.16 pmol·l-1 in Taihu Lake because of the phosphine released from sediments.
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Key words:
- sediments /
- release flux /
- phosphine /
- kinetics
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