Remediation of phenol contaminated soil using persulfate activated by ball-milled colloidal activated carbon

Annamalai, Sivasankar; Septian, Ardie; Choi, Jiyeon; Shin, Won Sik

doi:10.1016/j.jenvman.2022.114709

Cited by 20 publications

(2 citation statements)

References 51 publications

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“…2 However, after activation through light, heat, activators 3 and other conditions, the activated PS and its oxidation process generate free radicals, such as SO 4 −• , which can effectively remove environmental pollutants and can be applied to treating water pollution. The PS activators mainly include metal ions or metal compounds, such as iron (Fe) and cobalt, 4 and carbon (C)-related materials, such as activated C, 5 C nitride, biochar, and pyrolysis C. 6 Metal compounds, due to their stable structure and superior efficiency, have been the subject of extensive research and have seen widespread application. 7 Fe is an environmentally friendly metal.…”

Section: Persulfate (Ps)-induced Oxidation Is a New Chemical Oxidatio...mentioning

confidence: 99%

An economical pyrrhotite‐loaded sludge carbon composite effectively activated persulfate to sterilize Escherichia coli

Chen

Yang

Xia

et al. 2023

J of Chemical Tech & Biotech

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BACKGROUNDPersulfate (PS) has the capability to yield free radicals via activators, thereby shaping an advanced oxidation process that can significantly contribute to effective sterilization. Central to this technology is the pursuit of appropriate activators.RESULTSIn our research, we successfully synthesized an economical and efficient PS activator, namely a pyrrhotite‐loaded sludge carbon (Pyr‐SC) composite. This was achieved via a straightforward procedure utilizing two environmentally friendly and cost‐efficient raw materials: pyrite and sludge. Pyr‐SC exhibited a specific surface area of 60.4 m2 g−1 and rich functional groups such as carbon–sulfur and sulfur–oxygen. The magnetic and graphitic carbon structures were formed at high temperatures during the preparation process, and the sludge carbon (SC) exhibited porous defects, which allowed the effective insertion of iron/sulfur into SC to form the stable Pyr‐SC structure. Pyr‐SC activated PS, which further sterilized Escherichia coli in the wastewater at a sterilization rate of 7.00 lg E. coli at 107 cfu mL−1 in 80 min. The sterilization rate was less affected by temperature and pH. We verified sulfate, hydroxyl and oxygen free radicals produced by the Pyr‐SC‐activated PS. The Pyr‐SC composite, thanks to its expedited electron transfer, could activate PS to engender free radicals. Furthermore, the oscillatory transformation of iron ions caused by the monosulfide ion on the Pyr‐SC surface augmented the production of free radicals. An assessment of Pyr‐SC's stability was conducted, adhering to the principles of magnetic separation. After five cycles in the Pyr‐SC/PS reaction system, the sterilization rate reached 3.29 lg, whereas the leaching rate of iron in Pyr‐SC decreased. The Pyr‐SC/PS reaction system also had a broad spectrum of wastewater.CONCLUSIONThe economically prepared Pyr‐SC composite provided an effective technology for activating PS and sterilizing microorganisms in wastewater. © 2023 Society of Chemical Industry.

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Section: Persulfate (Ps)-induced Oxidation Is a New Chemical Oxidatio...mentioning

confidence: 99%

An economical pyrrhotite‐loaded sludge carbon composite effectively activated persulfate to sterilize Escherichia coli

Chen

Yang

Xia

et al. 2023

J of Chemical Tech & Biotech

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“…Moreover, the natural structure of coconut shell is suitable for the preparation of porous materials with low ash content [35]. In addition, several studies have reported that the AC could be utilized as a catalyst to activate PS for the decomposition of soil organic pollutants [1,36]. The oxygen-containing carbonyl functional group (C=O) and sp 2 hybridized carbon (sp 2 -C) of AC itself could act as active sites for the activation of PS [16,37].…”

Section: Introductionmentioning

confidence: 99%

Remediation of Polycyclic Aromatic Hydrocarbon-Contaminated Soil by Using Activated Persulfate with Carbonylated Activated Carbon Supported Nanoscale Zero-Valent Iron

Chen,

Yuan,

Sun

et al. 2024

Catalysts

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Soil contamination by polycyclic aromatic hydrocarbons (PAHs) has been an environmental issue worldwide, which aggravates the ecological risks faced by animals, plants, and humans. In this work, the composites of nanoscale zero-valent iron supported on carbonylated activated carbon (nZVI-CAC) were prepared and applied to activate persulfate (PS) for the degradation of PAHs in contaminated soil. The prepared nZVI-CAC catalyst was characterized by scanning electron microscopy (SEM), X-ray diffractometer (XRD), Fourier transform infrared spectroscopy (FTIR), and X-ray photoelectron spectroscopy (XPS). It was found that the PS/nZVI-CAC system was superior for phenanthrene (PHE) oxidation than other processes using different oxidants (PS/nZVI-CAC > PMS/nZVI-CAC > H2O2/nZVI-CAC) and it was also efficient for the degradation of other six PAHs with different structures and molar weights. Under optimal conditions, the lowest and highest degradation efficiencies for the selected PAHs were 60.8% and 90.7%, respectively. Active SO4−• and HO• were found to be generated on the surface of the catalysts, and SO4−• was dominant for PHE oxidation through quenching experiments. The results demonstrated that the heterogeneous process using activated PS with nZVI-CAC was effective for PAH degradation, which could provide a theoretical basis for the remediation of PAH-polluted soil.

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The Remediation of Organic Pollution in Soil by Persulfate

Yu,

Zeng,

et al. 2024

Water Air Soil Pollut

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Remediation of phenol contaminated soil using persulfate activated by ball-milled colloidal activated carbon

Cited by 20 publications

References 51 publications

An economical pyrrhotite‐loaded sludge carbon composite effectively activated persulfate to sterilize Escherichia coli

An economical pyrrhotite‐loaded sludge carbon composite effectively activated persulfate to sterilize Escherichia coli

Remediation of Polycyclic Aromatic Hydrocarbon-Contaminated Soil by Using Activated Persulfate with Carbonylated Activated Carbon Supported Nanoscale Zero-Valent Iron

The Remediation of Organic Pollution in Soil by Persulfate

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