低碱阴离子对铜和镍的吸附特性

M. Kurmanaliev, J. Jenisbek
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引用次数: 0

摘要

本文研究了含配位二次基的低碱阴离子对模型溶液中铜和镍离子的吸附规律。测定了铜镍离子与低碱吸附剂配基络合过程的主要动力学特征和浓度配位特征。电位滴定表明阴离子中含有低碱官能团,其pK值为7.2。研究表明,低碱大孔阴离子吸附铜离子的过程具有初始速率高、达到平衡速度快的特点,可保证在前10 ~ 15分钟内吸附铜离子达到平衡值的70%左右。确定了吸附过程的主要参数。对Langmuir方程坐标系下的吸附等温线进行了解析描述。结果表明,在平衡条件下,浓度为10 ~ 15 mmol/l的溶液提取率可达99.6 ~ 98.3%。在动态模式下对吸附过程的研究表明,在新的低碱阴离子上从水溶液中分离重金属离子是可能的。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
SPECIAL FEATURES OF COPPER AND NICKEL SORPTION ON LOW-BASE ANIONITES
In the work, the regularities of the process of sorption of copper and nickel ions from model solutions by low-base anionites containing coordination secondary groups are investigated. The main kinetic and concentration coordination characteristics of the process of complexation of copper and nickel ions with ligand groups of a low-base sorbent are determined.Potentiometric titration shows that anionite contains low-base functional groups, the pK of which is equal to 7.2.It is established that the process of sorption of copper ions by low-base macroporous anionite is characterized by a high initial rate and rapid achievement of equilibrium, which ensures absorption of copper ions about 70% of the equilibrium values in the first 10- 15 minutes.The main parameters of the sorption process are determined. Analytical description of sorption isotherm in coordinates of Langmuir equation is carried out. It was shown that due to high rates, the degree of extraction from solutions with a concentration of 10- 15 mmol/l under equilibrium conditions reaches 99.6-98.3%.Studies of the sorption process in a dynamic mode showed the possibility of separating heavy metal ions from aqueous solutions on new low-base anionites.
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