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Title: Heterogeneous photo-Fenton-like degradation of emerging pharmaceutical contaminants in wastewater using Cu-doped MgO nanoparticles

Journal Article · · Applied Catalysis. A, General
 [1];  [2];  [3];  [3];  [4];  [1]
  1. Lehigh Univ., Bethlehem, PA (United States)
  2. National Energy Technology Lab. (NETL), Pittsburgh, PA (United States)
  3. US Dept. of Agriculture (USDA) Agricultural Research Service (ARS), Maricopa, AZ (United States)
  4. Brookhaven National Lab. (BNL), Upton, NY (United States)

In this study, a facile thermal decomposition method was utilized to synthesize Cu-doped MgO nanoparticles possessing mesoporosity. These mesoporous Cu doped MgO nanoparticles were shown to be efficient photo-Fenton-like catalysts for the degradation of emerging pharmaceutical contaminants in wastewater and were able to completely oxidize salicylic acid within 1 hour under optimized conditions. Tetracycline was shown to be converted to other intermediates with a large portion of it undergoing full mineralization. Batch experiments were conducted to demonstrate the effects of Cu loading on MgO, overall catalyst loading, and H2O2 concentration on the salicylic acid and tetracycline conversion and rate constants. Quenching experiments revealed that both •OH radicals or HO2•/•O2- radicals were involved in the reaction, with the latter showing a higher contribution. The surface dissolution of MgO was shown to facilitate a high pH environment which completely prevented Cu from leaching out of the catalyst while retaining high activity. The catalyst reusability was shown to be satisfactory with high activity and conversion being preserved over five cycles.

Research Organization:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF)
Grant/Contract Number:
SC0012704; CHE 1710120
OSTI ID:
1870392
Report Number(s):
BNL-223024-2022-JAAM
Journal Information:
Applied Catalysis. A, General, Vol. 630; ISSN 0926-860X
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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