The adsorption and desorption behavior and mechanism research of cobalt, nickel and copper in nitrite - sulfuric acid system

ABSTRACT

In this paper, we studied the adsorption and desorption characteristics of cobalt, nickel, and copper in nitrite–sulfuric acid system, and their adsorption mechanism was also explored. The results showed that the adsorption capacity of cobalt and copper on the anion exchanger is 206 and 175 mg/g, respectively. However, the nickel adsorption capacity was very weak, exhibiting almost no adsorption. When the concentration of sodium nitrite was 1 mol/L, IRA-900 resin showed the best adsorption selectivity to cobalt. The FT-IR, UV absorption spectrometry, and XPS analysis results indicated that the adsorption mechanism of cobalt and copper could be attributed to the formation of anionic nitro-complexes in the solution, which could be exchanged with the anions on the resin to achieve the adsorption of metal ions. After a series of investigations, 1 mol/L sulfuric acid and ammonia were selected as desorption agents for cobalt and copper.

KEYWORDS:

• Adsorption
• cobalt
• nickel
• copper
• desorption

Disclosure statement

The authors declare the following financial interests/personal relationships which may be considered as potential competing interests: We declare that we have no financial and personal relationships with other people or organizations that can inappropriately influence our work, and there is no professional or other personal interest of any nature or kind in any product, service, and company that could be construed as influencing the position presented in or the review of the manuscript entitled.

Correction Statement

This article has been republished with minor changes. These changes do not impact the academic content of the article.

Additional information

Funding

This research was funded by the Natural Science Foundation of China, grant number 51804084; Science and Technology Major Project of Guangxi Province, grant number AA18118030; and the Natural Science Foundation of Guangxi Province, grant number 2018GXNSFAA281337 and 2020GXNSFAA297004.