Extraction of ions of zinc and copper by modified kaolinite forms

[摘要] A study was made on the extraction of zinc and copper ions by modified forms of kaolinite. The quantitative characteristics of the adsorption of zinc and copper ions are obtained. It is shown that kaolinite after alkaline and salt treatment increases the exchange capacity with respect to zinc and copper ions. The adsorption equilibrium was described using Langmuir and Freundlich models. The degree of extraction of zinc and copper ions from solutions was determined depending on their concentration at a constant mass of the adsorbent. It is shown that when kaolinite is modified by solutions of sodium chloride and sodium hydroxide, the adsorption capacity with respect to zinc and copper ions increases.

[发布机构] Department of General and Special Chemistry, Tyumen Industrial University, Lunacharsky Street, 2, Tyumen; 625001, Russia^1

[学科分类] 土木及结构工程学

[关键词] Adsorption capacities;Adsorption equilibria;Degree of extraction;Exchange capacities;Extraction of zinc and copper;Freundlich models;Quantitative characteristics;Salt treatments