@article {TIAN2023123021,
	title = {Extremely efficient mineralizing CN- into N2 via a newly developed system of generating sufficient ClO{\textbullet}/Cl2{\textbullet}- and self-decreasing pH},
	journal = {Separation and Purification Technology},
	volume = {309},
	year = {2023},
	pages = {123021},
	abstract = {In the presence of the difficulties pertinent to the selective oxidation of cyanide and the high-efficient hydrolysis of cyanate, the mineralization of cyanide into nitrogen could not be realized during the traditional processes. Herein, a novel system of electrocatalysis coupled with ultraviolet-based advanced oxidation processes (UV/EC/PS, PS: persulfate) is developed, exhibiting astonishingly high activity and selectivity for cyanide mineralization. The achieved results reveal that adequate active-chlorine species (ClO{\textbullet}/Cl2{\textbullet}-) are generated due to the synergistic effects of electrocatalysis and advanced oxidation processes and these are high-selective for cyanide mineralization. Concurrently, induced by the interconversion between active species, the pH value in the UV/EC/PS system vigorously lessens from 11.5 to 3.3 at a rate of 1.1~{\texttimes}~10-2 min-1, hugely speeding up the hydrolysis of cyanate intermediates. The results display that PS plays a pivotal role in the formation of ClO{\textbullet}/Cl2{\textbullet}- and the self-reduction of pH value in the UV/EC/PS system. Under the action of ClO{\textbullet}/Cl2{\textbullet}- and self-decreased pH value, 0.25~mM of ferricyanide is thoroughly mineralized into nitrogen within 80~min and no HCN evolves. Additionally, the UV/EC/PS system exhibits exceptional feasibility for the practical purifications of cyanide-containing wastewater (CCWW). This study aims to give new insights into developing technologies associated with the mineralization treatment of CCWW.},
	keywords = {Advanced oxidation processes, Cyanide, Electrocatalysis, Mineralization, nitrogen},
	issn = {1383-5866},
	doi = {http://doi.org/10.1016/j.seppur.2022.123021},
	url = {http://www.sciencedirect.com/science/article/pii/S1383586622025783},
	author = {Lei Tian and Meng-Ying Yin and Ling-Ling Zheng and Ying Chen and Liu, Wen and Jie-Ping Fan and Dai-She Wu and Jian-Ping Zou and Sheng-Lian Luo}
}