Persulfate non-radical activation by nano-CuO for efficient removal of chlorinated organic compounds: Reduced graphene oxide-assisted and CuO (0 0 1) facet-dependent

Du, Xiaoming; Zhang, Yongqing; Si, Fan; Yao, Chenhui; Du, Meimei; Hussain, Imtyaz; Kim, Hyunook; Huang, Shaobin; Lin, Zhang; Hayat, Waseem

doi:10.1016/j.cej.2018.08.216

Cited by 143 publications

(24 citation statements)

References 60 publications

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“…Table 1 summarized the basic structural parameters of CuO, CeO 2 , and CuO/CeO 2 . The specific surface area of CuO/CeO 2 reached 114.8 m 2 /g which was higher than that of CuO and CeO 2 , and was also much higher than that of other CuO-containing catalysts such as CuO/rGO (56.1 m 2 /g) (Du et al, 2019) and CuO/Ti 6 O 13 (6.93 m 2 /g) (Sehati and Entezari, 2017). The high specific surface area allowed the rapid electron transfer (Prathap et al, 2012) and would benefit the catalytic performance of CuO/CeO 2 .…”

Section: Resultsmentioning

confidence: 89%

A High-Efficiency CuO/CeO2 Catalyst for Diclofenac Degradation in Fenton-Like System

et al. 2019

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An efficient Fenton-like catalyst CuO/CeO2 was synthesized using ultrasonic impregnation and used to remove diclofenac from water. The catalyst was characterized by N2 adsorption-desorption, SEM-EDS, XRD, HRTEM, Raman, and XPS analyses. Results showed that CuO/CeO2 possessed large surface area, high porosity, and fine elements dispersion. Cu was loaded in CeO2, which increased the oxygen vacancies. The exposed crystal face of CeO2 (200) was beneficial to the catalytic activity. The diclofenac removal experiment showed that there was a synergistic effect between CuO and CeO2, which might be caused by more oxygen vacancies generation and electronic interactions between Cu and Ce species. The experimental conditions were optimized, including pH, catalyst and H2O2 dosages, and 86.62% diclofenac removal was achieved. Diclofenac oxidation by ·OH and adsorbed oxygen species was the main mechanism for its removal in this Fenton-like system.

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Section: Resultsmentioning

confidence: 89%

A High-Efficiency CuO/CeO2 Catalyst for Diclofenac Degradation in Fenton-Like System

et al. 2019

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“…The activation processes with transition metals highly rely on the interaction between PDS/PMS and active redox sites, during which • OH and SO 4 •− are typically produced as the primary oxidative species. However, thanks to the improvement of analytical techniques, some recent studies found that 1 O 2 can also be generated from multiple non-radical pathways in metal/PDS or metal/PMS system configurations, including PDS/PMS self-decomposition, recombination of O 2 •− , and the mutual effect between catalysts and PDS/PMS [ 87 , 88 ]. Interestingly, these processes could take place either simultaneously or coupled with radical oxidations as illustrated in Table 3 and Table 4 , which summarize the 1 O 2 evolution by activating PDS/PMS via heterogeneous transition metals.…”

Section: Evolution Of 1 O 2 mentioning

confidence: 99%

“…The activity and stability of nanocrystals is strongly dependent on orientation, dimension as well as the crystallographic structure. Du et al found that sheet-like CuO with preferential exposed crystal facet (001) exhibited much higher reactivity toward catalytic PDS activation than spindle-like CuO [ 88 ]. The activation of PDS on CuO mainly followed a non-radical process [ 116 ].…”

Section: Evolution Of 1 O 2 mentioning

confidence: 99%

Evolution of Singlet Oxygen by Activating Peroxydisulfate and Peroxymonosulfate: A Review

Xiao

Faheem

et al. 2021

IJERPH

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Advanced oxidation processes (AOPs) based on peroxydisulfate (PDS) or peroxymonosulfate (PMS) activation have attracted much research attention in the last decade for the degradation of recalcitrant organic contaminants. Sulfate (SO4•−) and hydroxyl (•OH) radicals are most frequently generated from catalytic PDS/PMS decomposition by thermal, base, irradiation, transition metals and carbon materials. In addition, increasingly more recent studies have reported the involvement of singlet oxygen (1O2) during PDS/PMS-based AOPs. Typically, 1O2 can be produced either along with SO4•− and •OH or discovered as the dominant reactive oxygen species (ROSs) for pollutants degradation. This paper reviews recent advances in 1O2 generation during PDS/PMS activation. First, it introduces the basic chemistry of 1O2, its oxidation properties and detection methodologies. Furthermore, it elaborates different activation strategies/techniques, including homogeneous and heterogeneous systems, and discusses the possible reaction mechanisms to give an overview of the principle of 1O2 production by activating PDS/PMS. Moreover, although 1O2 has shown promising features such as high degradation selectivity and anti-interference capability, its production pathways and mechanisms remain controversial in the present literatures. Therefore, this study identifies the research gaps and proposes future perspectives in the aspects of novel catalysts and related mechanisms.

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“…However, still trace pharmaceuticals could be detected even after an adsorption process is applied after a biological one. Therefore, a more integrated system combing adsorption and oxidation processes might be desirable as proposed by Du et al [68] or Sharma et al [69].…”

Section: Removal Of Pharmaceuticals In Tertiary Treatment Processesmentioning

confidence: 99%

Distribution and Removal of Pharmaceuticals in Liquid and Solid Phases in the Unit Processes of Sewage Treatment Plants

Park

Kim

Hong³

et al. 2020

IJERPH

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In this study, we analyzed 27 pharmaceuticals in liquid and solid phase samples collected from the unit processes of four different sewage treatment plants (STPs) to evaluate their distribution and behavior of the pharmaceuticals. The examination of the relative distributions of various categories of pharmaceuticals in the influent showed that non-steroidal anti-inflammatory drugs (NSAIDs) were the most dominant. While the relative distribution of antibiotics in the influent was not high (i.e., 3%–5%), it increased to 14%–30% in the effluent. In the four STPs, the mass load of the target pharmaceuticals was reduced by 88%–95% mainly in the biological treatment process, whereas the ratio of pharmaceuticals in waste sludge to those in the influent (w/w) was only 2%. In all the STPs, the removal efficiencies for the stimulant caffeine, NSAIDs (acetaminophen, naproxen, and acetylsalicylic acid), and the antibiotic cefradine were high; they were removed mainly by biological processes. Certain compounds, such as the NSAID ketoprofen, contrast agent iopromide, lipid regulator gemfibrozil, and antibiotic sulfamethoxazole, showed varying removal efficiencies depending on the contribution of biodegradation and sludge sorption. In addition, a quantitative meta-analysis was performed to compare the pharmaceutical removal efficiencies of the biological treatment processes in the four STPs, which were a membrane bioreactor (MBR) process, sequencing batch reactor (SBR) process, anaerobic–anoxic–oxic (A2O) process, and moving-bed biofilm reactor (MBBR) process. Among the biological processes, the removal efficiency was in the order of MBR > SBR > A2O > MBBR. Among the tertiary treatment processes investigated, powdered activated carbon showed the highest removal efficiency of 18%–63% for gemfibrozil, ibuprofen, ketoprofen, atenolol, cimetidine, and trimethoprim.

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Persulfate non-radical activation by nano-CuO for efficient removal of chlorinated organic compounds: Reduced graphene oxide-assisted and CuO (0 0 1) facet-dependent

Cited by 143 publications

References 60 publications

A High-Efficiency CuO/CeO2 Catalyst for Diclofenac Degradation in Fenton-Like System

A High-Efficiency CuO/CeO2 Catalyst for Diclofenac Degradation in Fenton-Like System

Evolution of Singlet Oxygen by Activating Peroxydisulfate and Peroxymonosulfate: A Review

Distribution and Removal of Pharmaceuticals in Liquid and Solid Phases in the Unit Processes of Sewage Treatment Plants

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Persulfate non-radical activation by nano-CuO for efficient removal of chlorinated organic compounds: Reduced graphene oxide-assisted and CuO (0 0 1) facet-dependent

Cited by 143 publications

References 60 publications

A High-Efficiency CuO/CeO2 Catalyst for Diclofenac Degradation in Fenton-Like System

A High-Efficiency CuO/CeO2 Catalyst for Diclofenac Degradation in Fenton-Like System

Evolution of Singlet Oxygen by Activating Peroxydisulfate and Peroxymonosulfate: A Review

Distribution and Removal of Pharmaceuticals in Liquid and Solid Phases in the Unit Processes of Sewage Treatment Plants

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Persulfate non-radical activation by nano-CuO for efficient removal of chlorinated organic compounds: Reduced graphene oxide-assisted and CuO (0 0 1) facet-dependent