摘要
研究了洞庭湖和太湖沉积物磷的释放、吸附动力学和吸附等温线,结果表明洞庭湖沉积物释磷量大于太湖,这与洞庭湖沉积物具有更多的铁结合态磷(Fe-P)、弱吸附态磷(Ads-P)和有机磷(Org-P)有关。沉积物对磷的吸附等温线符合Langmuir方程;洞庭湖沉积物的最大吸附量与最大缓冲容量均大于太湖,平衡吸附系数小于太湖沉积物;沉积物对磷的吸附动力学符合Elovich方程,且在12h内基本上达到动态平衡。
The release, adsorption kinetic and adsorption isotherm of phosphorus in sediments of Dongting lake and Taihu lake were studied. The results show that the amount of phosphorus released from sediment of Dongting lake is higher than that in the sediment of Taihu lake, because there are more Fe-P, Ads-P and Org-P in sediment of Dongting lake. The adsorption isotherm of phosphorus in sediments were fitted to Langmuir equation, the values of Qm and MBC of Dongting lake are higher than that of the Taihu lake, but the values of K is lower than that of the Taihu lake sediment. Phosphorus adsorption kinetic results were fitted to Elovich equation, and reach basically the state of dynamic balance after 12 hours.
出处
《世界核地质科学》
CAS
2014年第3期553-556,共4页
World Nuclear Geoscience
基金
科技基础性工作专项资助(编号:2008FY130200)
关键词
沉积物
磷
吸附
释放
sediments
phosphorus
absorb
release
