@article {doi:10.1021/acs.est.3c00190,
	title = {Targeted Decomplexation of Metal Complexes for Efficient Metal Recovery by Ozone/Percarbonate},
	journal = {Environmental Science \&amp; Technology},
	volume = {57},
	number = {12},
	year = {2023},
	note = {PMID: 36916663},
	pages = {5034-5045},
	abstract = {Traditional methods cannot efficiently recover Cu from Cu(II){\textendash}EDTA wastewater and encounter the formation of secondary contaminants. In this study, an ozone/percarbonate (O3/SPC) process was proposed to efficiently decomplex Cu(II){\textendash}EDTA and simultaneously recover Cu. The results demonstrate that the O3/SPC process achieves 100\% recovery of Cu with the corresponding kobs value of 0.103 min{\textendash}1 compared with the typical {\textbullet}OH-based O3/H2O2 process (81.2\%, 0.042 min{\textendash}1). The carbonate radical anion (CO3{\textbullet}{\textendash}) is generated from the O3/SPC process and carries out the targeted attack of amino groups of Cu(II){\textendash}EDTA for decarboxylation and deamination processes, resulting in successive cleavage of Cu{\textendash}O and Cu{\textendash}N bonds. In comparison, the {\textbullet}OH-based O3/H2O2 process is predominantly responsible for the breakage of Cu{\textendash}O bonds via decarboxylation and formic acid removal. Moreover, the released Cu(II) can be transformed into stable copper precipitates by employing an endogenous precipitant (CO32{\textendash}), accompanied by toxic-free byproducts in the O3/SPC process. More importantly, the O3/SPC process exhibits excellent metal recovery in the treatment of real copper electroplating wastewater and other metal{\textendash}EDTA complexes. This study provides a promising technology and opens a new avenue for the efficient decomplexation of metal{\textendash}organic complexes with simultaneous recovery of valuable metal resources.},
	doi = {10.1021/acs.est.3c00190},
	url = {https://doi.org/10.1021/acs.est.3c00190},
	author = {Ying Chen and Mu, Yi and Lei Tian and Ling-Ling Zheng and Mei, Yi and Xing, Qiu-Ju and Liu, Wen and Jian-Ping Zou and Yang, Lixia and Luo, Shenglian and Wu, Daishe}
}
