河口水与污水混合有机物和磷的转移动力学  

Transfer kinetics of organic pollutants and phosphorus during sewage-estuarine water mixing

作　　者：陈松[1] 廖文卓[1] 许爱玉[1] 骆炳坤[1] 

机构地区：[1]国家海洋局第三海洋研究所,厦门361005

出　　处：《台湾海峡》1997年第4期409-414,共6页Journal of Oceanography In Taiwan Strait

基　　金：国家自然科学基金!49476289

摘　　要：污水与九龙江河口水混合研究表明，COD的降解符合一级动力学模式，降解速率常数k在0．04～0．11d－1之间，水体有机物的转移以降解作用为主；两种水体混合时，先产生磷的吸附，后释放，整个过程表现为颗粒磷向溶解无机磷的转移。颗粒磷的释放可用交换吸附动力学模式表示，由模式计算的平衡释放容量与测定值相符。溶解无机磷的增长速率符合一级模式，测定磷的净释放速率，用于校正海区的环境容量。The transfer kinetics of organic pollutants and phosphorus during the mixing of sewage and seawater with different salinity from Jiulongjiang Estuary are simulated. The degradation of COD follows the first-order kinetic equation:1nc= -kt+B,and the values of k falls between 0. 04 and 0. 01d-1 in the experimental conditions. The degradation is the major process of organic transfer.During sewage-seawater mixing,adsorption of phosphorus occurs in the first day and then continuous release. The overall processes show a transfer from particulate phosphorus to dissolved inorganic phosphorus. The release of particulate phosphorus can be expressed by an exchange-adsorption kinetic model t/Xp (t) = [t/Xp (eq)] + B'. The Xp(eq ) and Xp (eq) calculated from the model are very close to those measured. The Xp(eq) provides the maximum release of phosphorus under specified conditions. The increasing rate of dissolved inorganic phosphorus is governed by the first-order kinetic model:1nc=kipt+b. The value of kir related closely to the initial adsorption rate and the net increasing rate is deduced to about 0. 01d- 1,and can be applied to rectify the environment capacity of phosphorus.

关 键 词：河口 水 污水 混合有机物 磷 转移动力学 

分 类 号：X522[环境科学与工程—环境工程] X343.5