Open AccessSPECIAL FEATURES OF COPPER AND NICKEL SORPTION ON LOW-BASE ANIONITES
Author(s) -
M. Kurmanaliev,
J. Jenisbek
Publication year - 2021
Publication title -
himičeskij žurnal kazahstana
Language(s) - English
Resource type - Journals
eISSN - 2710-1185
pISSN - 1813-1107
DOI - 10.51580/2021-1/2710-1185.38
Subject(s) - sorption , nickel , copper , sorbent , potentiometric titration , chemistry , aqueous solution , inorganic chemistry , metal ions in aqueous solution , adsorption , ion , langmuir adsorption model , langmuir , organic chemistry
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.