摘要
采用同一湖泊沉积物的新鲜样品进行试验,探讨不同组成湖泊沉积物对磷吸附的动力学.结果表明:随着有机质含量的增加,湖泊沉积物对磷的最大吸附量有增大的趋势,对磷的吸附作用主要受有机质、全铁、全镁及粘粒含量的影响;对磷的吸附速率随沉积物粘粒量、全铁量的增加而加快,有机质的含量也对磷的吸附速率产生一定影响;比较不同基质沉积物对磷吸附的一级动力学方程、抛物线扩散方程、双常数方程和Elovich方程的拟合情况,其中抛物线扩散方程拟合稍差,Elovich方程为最优拟合模型.
The adsorption kinetics of phosphorus in different composition of lake sediments were studied. The conclusions are as follows. The more organic mater in sediment is, the higher phosphorus sorption maxima will be. Factors affecting phosphorus sorption include OM, total-Fe, total-Mg and clay content. Sorption rate of phosphate on sediment are improved with the increase of clay content and total-Fe. OM of sediment also affects sorption rate of phosphate. Elovich equation is the best one among the fitted model equations and parabolic diffusion equation is the worst. The other two models （first-order equation and two-constant rate equation） are between the above two.
出处
《扬州大学学报（自然科学版）》
CAS
CSCD
2008年第2期70-73,共4页
Journal of Yangzhou University：Natural Science Edition
基金
重庆市自然科学基金资助项目(2004)
重庆市“十五”科技攻关项目(2004)
关键词
湖泊沉积物
磷
吸附动力学
sediments
phosphorus
adsorption kinetics
作者简介
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