摘要
研究了黄河水中表层沉积物对Cu2 + 的交换吸附等温线以及赖氨酸和天门冬氨酸对吸附作用的影响。实验结果得到一类具有一个“拐点”、两个“平台的新型河流等温线 ,用分级离子交换等温式求出平衡常数K1 和K2 ,并证实Cu2 + 在黄河水中与表层沉积物的交换作用是分两级进行的。当有低浓度氨基酸存在时 ,对铜与表层沉积物的交换吸附起促进作用。
This study focuses on the interaction between Cu 2+ and surface sediment as well as the effects of lysine acid and asparaginic acid on the related adsorption and exchange isotherms. According to the experiment, a new type of isotherm is obtained, which is characterized by two curves joined together with a turning point and two plateaus. Calculation using the isothermal equation of solidparticles results in the exchange equilibrium constants: K 1 and K 2, indicating that the exchange between Cu 2+ and surface sediment in the Yellow river water goes in two steps. It is also showed that the low level amino acid in the river water boosts the exchange.
出处
《环境科学与技术》
CAS
CSCD
2002年第4期6-7,共2页
Environmental Science & Technology
基金
内蒙古自治区自然科学基金资助项目 (990 30 3 1 )
