【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.更多还原

【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.更多还原