Reply to the comments on "Facilely synthesized cobalt doped hydroxyapatite as hydroxyl promoted peroxymonosulfate activator for degradation of Rhodamine B" by Zuo et al

Yixiong Pang; Diyun Chen; Lingjun Kong; Gutha Yuvaraja; Sajid Mehmood

doi:10.1016/j.jhazmat.2022.130572

Reply to the comments on "Facilely synthesized cobalt doped hydroxyapatite as hydroxyl promoted peroxymonosulfate activator for degradation of Rhodamine B" by Zuo et al

J Hazard Mater. 2023 Mar 5:445:130572. doi: 10.1016/j.jhazmat.2022.130572. Epub 2022 Dec 15.

Authors

Yixiong Pang¹, Diyun Chen², Lingjun Kong³, Gutha Yuvaraja¹, Sajid Mehmood¹

Affiliations

¹ Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China.
² Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China. Electronic address: cdy@gzhu.edu.cn.
³ Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China; Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China. Electronic address: kongljun@gzhu.edu.cn.

PMID: 37055978
DOI: 10.1016/j.jhazmat.2022.130572

Abstract

In a Co-HAP/PMS system, catalytic degradation process of RhB was accompanied by the gradual leaching of cobalt ion. The results of additional experiments showed that leached cobalt ion indeed contributed to active PMS for RhB degradation, which was not addressed in the previous study. The finding of the contribution from leached cobalt ion to PMS activation was reported due to the valuable comments of Zuo et al., what will be concerned in the future work. Importantly, Co-HAP still showed a significant contribution to PMS activation for RhB degradation at the initial stage. Fortunately, the release of Co²⁺ from Co-HAP was slow, the secondary pollution could not be addressed due to the slightly release of Co²⁺ ion that the Co²⁺ concentration is lower than the standard of the discharge wastewater. Furthermore, the mechanism of non-radical reaction in the Co-HAP/PMS system was reported to confirm the heterogeneous catalysis of a Co-HAP/PMS system.

Keywords: Co-HAP; Leached cobalt ion; RhB degradation.

Publication types

Letter