Journal
SCIENCE OF THE TOTAL ENVIRONMENT
Volume 749, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.scitotenv.2020.142387
Keywords
Peroxymonosulfate; Activation; CuS; Hydroxyl radical; Diethyl phthalate
Categories
Funding
- National Key Research and Development Program of China [2017YFA0207001]
- Natural Science Foundation of Jiangsu Province of China [BK20170050]
- National Natural Science Foundation of China [41671478]
- Youth Innovation Promotion Association of CAS [2014270]
- University of Cincinnati through aUNESCO co-Chair Professor Position on Water Access and Sustainability
- Herman Schneider Professorship in the College of Engineering and Applied Sciences
Ask authors/readers for more resources
Copper-containing minerals have been extensively used in Fenton-like processes for degradation of pollutants and have exhibited great potential for environmental remediation. This work reports the first use of copper sulfide (CuS), a typical Cu-mineral, for the activation of peroxymonosulfate (PMS) for pollutant degradation; the study also elucidates the underlying mechanism of these processes. Copper sulfide effectively activated PMS to degrade diethyl phthalate (DEP). Electron paramagnetic resonance, free radical quenching, X-ray photoelectron spectroscopy, X-ray diffraction analyses and DFT calculations confirmed that =Cu (I)/=Cu (II) cycling on the surface of CuS provided the main pathway to activate PMS to produce highly oxidative species. Unlike conventional sulfate radical-based PMS activation processes, hydroxyl radical (OH) were found to be the dominant radical in the tested CuS/PMS system, which performed more efficiently than an alternative OH-based oxidation system (CuS/H2O2) for DEP degradation. In addition, the presence of anions such Cl- and NO3- has limited inhibition effects on DEP degradation. Overall, this study provides an efficient pathway for PMS-based environmental remediation as well as a new insight into the mechanism of PMS activation by Cu-containing minerals. (C) 2020 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available