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Heterogeneous activation of persulfate by reduced graphene oxide-elemental silver/magnetite nanohybrids for the oxidative degradation of pharmaceuticals and endocrine disrupting compounds in water.
Appl Catal B. 2018 Jun 05; 225:91-99.AC

Abstract

Reduced graphene oxide hybridized with zero-valent silver and magnetite nanoparticles (NPs) (rGO-Ag0/Fe3O4 nanohybrids) prepared via in situ nucleation and crystallization was used to activate peroxydisulfate (PDS) for degradation of pharmaceuticals and endocrine disrupting compounds (phenol, acetaminophen, ibuprofen, naproxen, bisphenol A, 17β-estradiol, and 17α-ethinyl estradiol). The deposition of Ag0 and Fe3O4 in rGO nanosheet enhanced the catalytic removal of phenol in the heterogeneous activation of PDS. The adsorption capacities of rGO-Ag0/Fe3O4 for 10 μM phenol were 1.76, 1.33, and 2.04 μmol g-1-adsorbent at pH 4, 7, and 10, respectively, which are much higher than those of single NPs studied (Ag0, nanoscale zero-valent iron, and rGO). The rGO-Ag0/Fe3O4 effectively activated PDS to produce strong oxidizing SO4·and facilitate an electron transfer on the surface of the nanohybrid. The initial pseudo-first-order rate (k ini) constant for phenol degradation in PDS/rGO-Ag0/Fe3O4 system was 0.46 h-1 at pH 7, which is approximately eight times higher than that in the presence of single NPs (k ini = 0.04-0.06 h-1) due to the synergistic effects between adsorption and catalytic oxidation. Among various organic contaminants tested, the simultaneous use of rGO-Ag0/Fe3O4 (0.1 g/L) and PDS (1 mM) achieved more than 99% degradation of acetaminophen and 17β-estradiol at pH 7. The radical scavenging studies with methanol and natural organic matter indicated that phenol was more likely to be degraded via free SO4·- and ·OH formation or a non-radical oxidative pathway. Our findings indicate that the rGO-Ag0/Fe O nanohybrids can be used as an efficient magnetically-separable nanocatalyst for removal of organic compounds in water and wastewater treatment.

Authors+Show Affiliations

Department of Environmental Engineering, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu, 41566, South Korea. National Research Council Research Associate at the U.S. Environmental Protection Agency, 919 Kerr Research Drive, Ada, OK 74820, USA.Department of Civil and Environmental Engineering, Korea Army Academy at Youngcheon, 495 Hogook-ro, Gokyungmeon, Youngcheon, Gyeongbuk 38900, South Korea.National Research Council Research Associate at the U.S. Environmental Protection Agency, 919 Kerr Research Drive, Ada, OK 74820, USA.Groundwater, Watershed and Ecosystem Restoration Division, National Risk Management Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency, 919 Kerr Research Drive, Ada, OK 74820, USA.Department of Civil and Environmental Engineering, University of South Carolina, 300 Main Street, Columbia, SC 29208, USA.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

32704206

Citation

Park, Chang Min, et al. "Heterogeneous Activation of Persulfate By Reduced Graphene Oxide-elemental Silver/magnetite Nanohybrids for the Oxidative Degradation of Pharmaceuticals and Endocrine Disrupting Compounds in Water." Applied Catalysis. B, Environmental, vol. 225, 2018, pp. 91-99.
Park CM, Heo J, Wang D, et al. Heterogeneous activation of persulfate by reduced graphene oxide-elemental silver/magnetite nanohybrids for the oxidative degradation of pharmaceuticals and endocrine disrupting compounds in water. Applied catalysis. B, Environmental. 2018;225:91-99.
Park, C. M., Heo, J., Wang, D., Su, C., & Yoon, Y. (2018). Heterogeneous activation of persulfate by reduced graphene oxide-elemental silver/magnetite nanohybrids for the oxidative degradation of pharmaceuticals and endocrine disrupting compounds in water. Applied Catalysis. B, Environmental, 225, 91-99. https://doi.org/10.1016/j.apcatb.2017.11.058
Park CM, et al. Heterogeneous Activation of Persulfate By Reduced Graphene Oxide-elemental Silver/magnetite Nanohybrids for the Oxidative Degradation of Pharmaceuticals and Endocrine Disrupting Compounds in Water. Applied catalysis. B, Environmental. 2018 Jun 5;225:91-99. PubMed PMID: 32704206.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Heterogeneous activation of persulfate by reduced graphene oxide-elemental silver/magnetite nanohybrids for the oxidative degradation of pharmaceuticals and endocrine disrupting compounds in water. AU - Park,Chang Min, AU - Heo,Jiyong, AU - Wang,Dengjun, AU - Su,Chunming, AU - Yoon,Yeomin, PY - 2020/7/25/entrez PY - 2018/6/5/pubmed PY - 2018/6/5/medline KW - Heterogeneous activation KW - Nanohybrid KW - Peroxydisulfate KW - Phenol KW - Sulfate radicals SP - 91 EP - 99 JF - Applied catalysis. B, Environmental VL - 225 N2 - Reduced graphene oxide hybridized with zero-valent silver and magnetite nanoparticles (NPs) (rGO-Ag0/Fe3O4 nanohybrids) prepared via in situ nucleation and crystallization was used to activate peroxydisulfate (PDS) for degradation of pharmaceuticals and endocrine disrupting compounds (phenol, acetaminophen, ibuprofen, naproxen, bisphenol A, 17β-estradiol, and 17α-ethinyl estradiol). The deposition of Ag0 and Fe3O4 in rGO nanosheet enhanced the catalytic removal of phenol in the heterogeneous activation of PDS. The adsorption capacities of rGO-Ag0/Fe3O4 for 10 μM phenol were 1.76, 1.33, and 2.04 μmol g-1-adsorbent at pH 4, 7, and 10, respectively, which are much higher than those of single NPs studied (Ag0, nanoscale zero-valent iron, and rGO). The rGO-Ag0/Fe3O4 effectively activated PDS to produce strong oxidizing SO4·and facilitate an electron transfer on the surface of the nanohybrid. The initial pseudo-first-order rate (k ini) constant for phenol degradation in PDS/rGO-Ag0/Fe3O4 system was 0.46 h-1 at pH 7, which is approximately eight times higher than that in the presence of single NPs (k ini = 0.04-0.06 h-1) due to the synergistic effects between adsorption and catalytic oxidation. Among various organic contaminants tested, the simultaneous use of rGO-Ag0/Fe3O4 (0.1 g/L) and PDS (1 mM) achieved more than 99% degradation of acetaminophen and 17β-estradiol at pH 7. The radical scavenging studies with methanol and natural organic matter indicated that phenol was more likely to be degraded via free SO4·- and ·OH formation or a non-radical oxidative pathway. Our findings indicate that the rGO-Ag0/Fe O nanohybrids can be used as an efficient magnetically-separable nanocatalyst for removal of organic compounds in water and wastewater treatment. SN - 0926-3373 UR - https://www.unboundmedicine.com/medline/citation/32704206/Heterogeneous_activation_of_persulfate_by_reduced_graphene_oxide_elemental_silver/magnetite_nanohybrids_for_the_oxidative_degradation_of_pharmaceuticals_and_endocrine_disrupting_compounds_in_water_ L2 - https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/32704206/ DB - PRIME DP - Unbound Medicine ER -
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