Response to Comment on 'Activation of Persulfate by Graphitized Nanodiamonds for Removal of Organic Compounds'

摘要

We appreciate the opportunity to respond to the comments of Duan et al.~1 on our recent article.~2 The issues regarding roles of radical species and singlet oxygen raised by Duan et al.~1 are addressed below with additional experimental data, but other comments of minor importance are not dealt with here due to the page limit. Regarding the controversial issues on the mechanism of persulfate activation by carbon materials (i.e., radical versus nonradical pathways), either of the two pathways cannot be completely excluded. What matters is which pathway is more dominant. After a comprehensive review of our experimental data,~2 we have concluded that the nonradical pathway is the dominant mechanism of persulfate activation by graphitized nanodiamonds (G-NDs).