摘要
本文研究了黄河水中Ｃｄ^(２＋)与悬浮粒子相互作用的等温线，以及精氨酸和酪氨酸对等温线的影响．得到的等温线具有一个“拐点”两个“平台”，属二级离子交换。用分级离子交换等温式求出了吸附平衡常数Ｋ_１Ｋ_２。当低浓度的氨基酸存在时，对Ｃｄ^(２＋)与悬浮粒子的交换吸附起促进作用，促进作用的程度与氨基酸的等电点有关，精氨酸的促进作用较酪氨酸大。
The isotherms of the interaction between the suspended particles with Cd2+, and the effects of arginine and tyrosine on the isotherms in the Yellow River were studied. The isotherm is formed by two curves joined together with a 'flat portion' in the middle. It belongs to second order exchange reaction. The adsorption equilibrium constants K_1 and K_2 were calculated by using the isothermal equation of surface stepwise ion excha- nge. Amino acid in small amount promotes exchange adsorption of the suspended particles with Cd_2+. The degree of promotive action relates to the isoelectric point of amino acid. The promotion of arginine is bigger than tyrosine.
出处
《海洋湖沼通报》
CSCD
北大核心
2000年第1期8-12,共5页
Transactions of Oceanology and Limnology
基金
National Natural Science Foundation of China!(29361001)
关键词
交换吸附
悬浮粒子
镉
氨基酸
黄河水
等温线
exchange adsorption, suspended particle, cadmium, amino acid, the Yellow River.
