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Article ; Online: Study on Removal Mechanism for Copper Cyanide Complex Ions in Water

Ying Liu / Baogang Sun / Wenting Jia / Yuan Wang / Lijia Huang / Pengge Ning / Shaojun Yuan

International Journal of Molecular Sciences, Vol 24, Iss 5066, p

Ion Species Differences and Evolution Process

2023  Volume 5066

Abstract: A large amount of cyanide-containing wastewater is discharged during electrode material synthesis. Among them, cyanides will form metal–cyanide complex ions which possess high stability, making it challenging to separate them from these wastewaters. ... ...

Abstract A large amount of cyanide-containing wastewater is discharged during electrode material synthesis. Among them, cyanides will form metal–cyanide complex ions which possess high stability, making it challenging to separate them from these wastewaters. Therefore, it is imperative to understand the complexation mechanism of cyanide ions and heavy metal ions from wastewater in order to obtain a deep insight into the process of cyanide removal. This study employs Density Functional Theory (DFT) calculations to reveal the complexation mechanism of metal–cyanide complex ions formed by the interaction of Cu + and CN − in copper cyanide systems and its transformation patterns. Quantum chemical calculations show that the precipitation properties of Cu(CN) 4 3− can assist in the removal of CN − . Therefore, transferring other metal–cyanide complex ions to Cu(CN) 4 3− can achieve deep removal. OLI studio 11.0 analyzed the optimal process parameters of Cu(CN) 4 3− under different conditions and determined the optimal process parameters of the removal depth of CN − . This work has the potential to contribute to the future preparation of related materials such as CN − removal adsorbents and catalysts and provide theoretical foundations for the development of more efficient, stable, and environmentally friendly next-generation energy storage electrode materials.
Keywords wastewater treatment ; ion species ; cyanide ; deep removal ; complexation mechanism ; cupric ion ; Biology (General) ; QH301-705.5 ; Chemistry ; QD1-999
Subject code 333
Language English
Publishing date 2023-03-01T00:00:00Z
Publisher MDPI AG
Document type Article ; Online
Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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