Persulfate Activation Research Articles

Removal of N-methyl-pyrrolidone from lithium battery production wastewater by persulfate co-activated with Fe2+ and self-contained nano-graphite.

Removal of N-methyl-pyrrolidone from lithium battery production wastewater by persulfate co-activated with Fe2+ and self-contained nano-graphite.

Synergistic Degradation of 4‐Chlorophenol and 3‐Chlorobenzoic acid via Organic Ligand–Assisted Fe(II)/Persulfate Activation: Molecular Pathways and Environmental Impacts

ABSTRACTChlorinated aromatic chemicals are highly hazardous, transmissible, and bioaccumulative. Developing an economically feasible catalytic method to facilitate the effective removal of chlorinated aromatic pollutants is critical for contamination prevention. The current study extensively investigated the utilization of organic ligands such as citrate (CA) and ethylenediaminetetraacetic acid (EDTA) to increase Fe(II)‐activated persulfate (PS) for 4‐chlorophenol (4‐CP) and 3‐chlorobenzoic acid (3‐CB) degradation in water. The decomposition and consumption ability of persulfate in PS alone and Fe(II)/PS systems for 4‐CP and 3‐CB was very low because of the rapid utilization as well as discontinuous availability of Fe(II), which indicates the decline of Fe(III) to Fe(II). But, when using the citrate/Fe(II)/PS and EDTA/Fe(II)/PS combinations, the degradation of 4‐CP and 3‐CB was 78.86%, 75.01% and 84.84%, 80.99% within 30 min, respectively. The significant enhancement is due to both ligand‐to‐metal transfer of charges process, and this increased the process of rate determination through carrying electrons into the citrate and EDTA ligands to Fe(III), generating Fe(II). In addition, the 4‐CP and 3‐CB degradation facilitated with citrate/Fe(II)/PS and EDTA/Fe(II)/PS systems was efficiently degraded at acidic pH (2.0–6.0) conditions. The pseudo‐first‐order kinetics model accurately predicted 4‐CP and 3‐CB degradation in the organic ligand/Fe(II)/PS systems. The degradation percentage of 4‐CP and 3‐CB increased with increasing PS and Fe(II) concentrations. Moreover, both sulfate and hydroxyl radicals formed by citrate/Fe(II)/PS and EDTA/Fe(II)/PS systems were identified as major reactive oxygen species for 4‐CP and 3‐CB decomposition. The present investigation recommends an alternate strategy to enhance the Fe(II)‐activated persulfate mechanisms.

Fe-modified ZnO for enhancing the photocatalytic removal of Levofloxacin in water via persulfate activation

Abstract In this study, iron-modified zinc oxide (Fe-ZnO) was successfully synthesized using a simple modified co-precipitation method. The material exhibited diverse surface morphologies, including particles, thin flakes, and fibers. XRD analysis confirmed the coexistence of the hexagonal wurtzite structure and an unusual ZnO crystal phase. The incorporation of iron reduced the band gap energy and enhanced the degradation efficiency of Levofloxacin (LFX) in water. An investigation into the effects of various factors on LFX degradation revealed that high removal efficiencies were achieved under neutral pH conditions, with adequate persulfate addition, and with oxygen supply. At an initial LFX concentration of 10 ppm, the photocatalytic degradation system, operating for 2 h with 500 mgFe-ZnO/L, 50 mgPS/L, unadjusted pH (∼7), UVC irradiation, and air supply at room temperature, achieved a removal efficiency of 88.01%. The introduction of dissolved oxygen promoted chain reactions, generating various reactive oxygen species (ROS) and suppressing the recombination of electron–hole pairs in the Fe-ZnO/PS/UVC system. Furthermore, radical quenching experiments identified singlet oxygen (1O2) as the primary ROS responsible for LFX degradation in this system. Persulfate played a crucial role in accelerating LFX degradation by facilitating ROS generation. Finally, the photocatalytic degradation mechanism and pathways of LFX were proposed.

Vis-light-driven activation of persulfate by Bi2MoxW1-xO6: Elucidating the electronic mechanism for enhanced photocatalytic activity

Vis-light-driven activation of persulfate by Bi2MoxW1-xO6: Elucidating the electronic mechanism for enhanced photocatalytic activity

Accelerate degradation of tetracycline via persulfate activation over S,N-Fe co-doped banana peel biochar: The role of pyrolysis temperature and 1O2 evolution

Accelerate degradation of tetracycline via persulfate activation over S,N-Fe co-doped banana peel biochar: The role of pyrolysis temperature and 1O2 evolution

Efficient degradation of phenanthrene in wastewater via persulfate activation by blast furnace dust-derived catalyst

Efficient degradation of phenanthrene in wastewater via persulfate activation by blast furnace dust-derived catalyst

A defect-mediated WO3/FeOOH heterostructure as Z-scheme photocathode for efficient water purification via persulfate activation

A defect-mediated WO3/FeOOH heterostructure as Z-scheme photocathode for efficient water purification via persulfate activation

One-step self-assembled ZIF-derived flower-like carbon enhances reactivity of zero-valent iron during persulfate activation

One-step self-assembled ZIF-derived flower-like carbon enhances reactivity of zero-valent iron during persulfate activation

Molecular engineering of poly(amino)heptazine expands intra-molecular built-in electric field for efficient activation persulfate.

Molecular engineering of poly(amino)heptazine expands intra-molecular built-in electric field for efficient activation persulfate.

Visible-light-switched radical/non-radical bichannel degradation mechanism via round-the-clock synergistic CDs-BiO1-xCl/PS system.

Visible-light-switched radical/non-radical bichannel degradation mechanism via round-the-clock synergistic CDs-BiO1-xCl/PS system.

Mechanism insight into sulfidated nano zero-valent iron/biochar activated persulfate for highly efficient degradation of p-chloroaniline.

Mechanism insight into sulfidated nano zero-valent iron/biochar activated persulfate for highly efficient degradation of p-chloroaniline.

Optimizing the thiosulfate-mediated zerovalent iron/persulfate activation systems: Trade-off between Fe(III)/Fe(II) cycling and quenching effects in environmental remediation.

Optimizing the thiosulfate-mediated zerovalent iron/persulfate activation systems: Trade-off between Fe(III)/Fe(II) cycling and quenching effects in environmental remediation.

In-situ preparation of highly dispersed Fe doping C3N5 induced by inorganic iron salts with effective activation of PMS for photocatalytic degradation of chlortetracycline.

In-situ preparation of highly dispersed Fe doping C3N5 induced by inorganic iron salts with effective activation of PMS for photocatalytic degradation of chlortetracycline.

Metal ion/surfactant coupled system for activation of persulfate: Sulfate and hydroxy radical based in-situ oxidation of Congo red

Metal ion/surfactant coupled system for activation of persulfate: Sulfate and hydroxy radical based in-situ oxidation of Congo red

Visible-light activation of persulfate by nano-Fe/TiO2 photocatalyst towards efficient degradation of acid orange dye

Visible-light activation of persulfate by nano-Fe/TiO2 photocatalyst towards efficient degradation of acid orange dye

Efficient activation of persulfate by N, S, Fe co-doped rice husk biochar for degradation of sulfamethazine: Synergistic effect and degradation mechanism

Efficient activation of persulfate by N, S, Fe co-doped rice husk biochar for degradation of sulfamethazine: Synergistic effect and degradation mechanism

Efficient activation of persulfate by a novel lignin hydrogel supported Fe/Cu nanoparticles for bisphenol A degradation

Efficient activation of persulfate by a novel lignin hydrogel supported Fe/Cu nanoparticles for bisphenol A degradation

Electrochemical activation of persulfate for degradation of tetracycline hydrochloride based on Pt@MOF(Fe)/NF cathode

Electrochemical activation of persulfate for degradation of tetracycline hydrochloride based on Pt@MOF(Fe)/NF cathode

Experimental and kinetic analysis of Hg0 removal by CoFe2O4 nanoparticles as an efficient activator of persulfate

Experimental and kinetic analysis of Hg0 removal by CoFe2O4 nanoparticles as an efficient activator of persulfate

Synergistic activation of peroxydisulfate by photothermal and FeS2-loaded air-laid cloth in a shallow continuous flow reactor.

Synergistic activation of peroxydisulfate by photothermal and FeS2-loaded air-laid cloth in a shallow continuous flow reactor.