Critical review of the science and sustainability of persulphate advanced oxidation processes

Ike, Ikechukwu Anthony; Linden, KG; Orbell, John D.; Duke, Mikel

doi:10.1016/j.cej.2018.01.034

Cited by 499 publications

(128 citation statements)

References 167 publications

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“…Ultraviolet (UV), a common disinfection and oxidation method, can activate PS (UV/PS process) to produce SO4 •-(Eq. (1)) [9], which has a high redox potential (E o SO 4…”

Section: Introductionmentioning

confidence: 99%

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Methylene blue degradation by the VUV/UV/persulfate process: Effect of pH on the roles of photolysis and oxidation

Wen

et al. 2020

Journal of Hazardous Materials

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Graphical Abstract Highlights  VUV/UV/persulfate (VUV/UV/PS) process obviously enhanced methylene blue degradation. VUV UV HO • other SO 4 •-J o u r n a l P r e -p r o o f  Degradation and mineralization of methylene blue exhibited different trends with pH. HO • and SO4 •were proved to be the principal reactive oxygen species. The application potential of VUV/UV/PS process was demonstrated in real waters. Solution pH notably affected photon absorption distributions and reaction mechanism. AbstractThis study investigated methylene blue (MB) degradation by the vacuumultraviolet/ultraviolet/persulfate (VUV/UV/PS) process using a mini-fluidic VUV/UV photoreaction system. Results show that MB degradation by the VUV/UV/PS process was significantly higher than that of the conventional UV/PS process, as the VUV photolysis of H2O and PS generated more reactive oxygen species (ROSs). HO • and SO4 •-, identified as the main ROSs, were mostly consumed by dissolved organic carbon and Clin real waters, respectively. Additionally, the impacts of solution pH and the concentrations of PS, humic acid, and inorganic ions (HCO3 -, Cl -, NO3 -, SO4 2-, Fe(II), and Fe(III)) were systematically evaluated. The solution pH significantly affected the photon absorption distributions, as well as the contributions of photolysis and oxidation to MB degradation, resulting in different variations in the degradation rate constant and total organic carbon removal ratio with increasing solution pH. At all tested pH levels (3.0-11.0), particularly under acidic conditions, HO • and SO4 •were two predominant contributors to MB degradation, while VUV and UV photolysis contributed more when the solution pH increased. This study provides a highly efficient process for organic J o u r n a l P r e -p r o o f pollutant removal, which could be applied in water treatment. S O 2 SO ( 1.4) hv        (1) Low-pressure (LP) mercury lamps are a highly efficient UV light source for water treatment, with a photon-energy efficiency of approximately 36% [12]. By using J o u r n a l P r e -p r o o f

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“…Ultraviolet (UV), a common disinfection and oxidation method, can activate PS (UV/PS process) to produce SO4 •-(Eq. (1)) [9], which has a high redox potential (E o SO 4…”

Section: Introductionmentioning

confidence: 99%

“…S3), MB degradation by both direct PS oxidation (kPS = 2.3 × 10 -4 s -1 ) and direct UV photolysis (kUV = 6.8 m 2 einstein -1 ) was very low.However, the UV/PS process significantly increased the reaction rate constant (kUV/PS = 78.3 m 2 einstein -1 ) because of the formation of SO4 •-(Eq. (1))[9] and HO • (Eq. (S7);…”

mentioning

confidence: 99%

Methylene blue degradation by the VUV/UV/persulfate process: Effect of pH on the roles of photolysis and oxidation

Wen

et al. 2020

Journal of Hazardous Materials

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“…19 Persulfate oxidation is a new type of AOP developed in recent years. 20 Persulfate is solid at room temperature, easy to store and transport, and has high stability and water solubility. Sulfate radical anion ( 24 In this study, a metal-organic framework, MIL-101(Cr), was used to adsorb sulfamethoxazole (SMZ) in water.…”

Section: Introductionmentioning

confidence: 99%

Adsorption characteristics of metal–organic framework MIL-101(Cr) towards sulfamethoxazole and its persulfate oxidation regeneration

Huang

Gao

et al. 2018

RSC Adv.

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“…In this work, we prepared MIP‐based nanozymes using Fe 3 O 4 as a nanozyme unit, methylene blue (MB) as template and pyrrole as a functional monomer and crosslinker. The prepared composite Fe 3 O 4 @PPy MIPs exhibited high catalytic selectivity for MB in the presence of sodium persulfate (PS), which is a sulfate radical‐based oxidant that can function under mild conditions without formation of byproducts after reaction with nanozymes like Fe 3 O 4 . To optimize the catalytic selectivity, the preparation process of the Fe 3 O 4 @PPy MIPs and the ratio of Fe 3 O 4 @PPy MIPs to PS were carefully investigated.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and Application of Magnetically Catalytic Imprinting Nanozymes

Liu

Xing

et al. 2020

ChemistrySelect

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Nanozymes exhibit excellent enzyme‐like activities but lack specificity. Here, molecularly imprinted polymers (MIPs) based on polypyrrole (PPy) and using methylene blue (MB) as template were grown on Fe3O4 nanozymes to enhance the catalytic selectivity. The obtained composite Fe3O4@PPy MIPs were characterized using a scanning electron microscope, transmission electron microscope, powder X‐ray diffractometer, and vibrating sample magnetometer. The PPy‐encapsulated Fe3O4 nanozymes retained their catalytic ability and almost completely removed MB within 30 min in the presence of sodium persulfate. In comparison with bare Fe3O4 nanozymes, the Fe3O4@PPy MIPs showed superior catalytic selectivity for MB. The apparent rate constants (kapp) for MB, rhodamine B, and methyl orange were 0.073, 0.035, and 0.012 min−1, respectively. Even after five recycling steps, the obtained Fe3O4@PPy MIPs could degrade more than 80% of MB.

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Critical review of the science and sustainability of persulphate advanced oxidation processes

Cited by 499 publications

References 167 publications

Methylene blue degradation by the VUV/UV/persulfate process: Effect of pH on the roles of photolysis and oxidation

Methylene blue degradation by the VUV/UV/persulfate process: Effect of pH on the roles of photolysis and oxidation

Adsorption characteristics of metal–organic framework MIL-101(Cr) towards sulfamethoxazole and its persulfate oxidation regeneration

Fabrication and Application of Magnetically Catalytic Imprinting Nanozymes

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