摘要
本文模拟研究了厦门污水与海水混合后,海水颗粒物对磷的吸附-解吸过程,结果表明:颗粒物对磷的吸附只在混合后的1d内进行,之后即产生颗粒磷的释放,并表现为颗粒磷→溶解磷→溶解无机磷的转移过程。溶解无机磷是水体中磷的重要存在形式,其浓度的增加速率基本符合一级动力学模式。颗粒磷的释放过程可用交换吸附动力学模式(t/X)=(t/X_(eq))+B′处理。
The transfer processes of phosphorus between seawater and particles during effluents discharge in Xiamen Bay were simulated in the laboratory. The results indicate that the adsorption of phosphorus on particles takes place only in the first day of mixing, right after which the release of particulate phosphorus occures. The processes follow the pattern of transfer from particulate phosphorus to dis solved phosphorus to dissolved inorganic phosphorus(DIP). Among them, the latter accounts for the major species. The increasing rate of DIP confirms principally to the first order kinetic model :Inc=kt+B, and the rate constants k varies significantly with the initial DIP concentration (c_0) and initial adsorption rate, suggesting the ion-exchange nature of the processes.The release of particulate phosphorus could be modelled by the exchange-adsorption kinetic formula: (t/X)=(L/X_(eq))+B'. The equilibrium release calculated from the formula agrees well with that of field determination.The release of particulate phosphorus in seawater will reduce the environmental capacity of phosphorus, and this factor should taken into account in the environment capacity assessment of phosphorus.
出处
《台湾海峡》
CAS
CSCD
1991年第1期1-6,共6页
Journal of Oceanography In Taiwan Strait
关键词
污水
海水
颗粒物
磷
吸附
释放
Phosphorus
particulate matter
adsorption-release experiment
