Related references
Note: Only part of the references are listed.
Article
Engineering, Environmental
Chaosheng Bao et al.
Summary: Metal-organic frameworks (MOFs)-based Fenton-like catalysts with mixed-valence and oxygen vacancies (OVs) were designed to activate H2O2. The study found that the degradation efficiency of norfloxacin (NOR) by the H2-reduced Fe-MIL-101 (Fe-MIL-101-H-220) at 220 degrees C was significantly higher than that of the original Fe-MIL-101 and showed excellent degradation efficiency for other pollutants as well. Furthermore, the Fe-MIL-101-H-220/H2O2 system exhibited superior degradation efficiency for NOR over a wide pH range and could maintain a high degradation efficiency even after 5 cycles. The high performance is attributed to the cooperation of OVs and FeIII/FeII sites.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Environmental Sciences
Chunxia Ding et al.
Summary: Carbon-based materials catalyzing peroxymonosulfate for green degradation of persistent organic pollutants have been widely studied. In this research, a hydrochar-montmorillonite composite catalyst was prepared and demonstrated to have superior catalytic performance for peroxymonosulfate activation.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Chemistry, Physical
Kexin Yin et al.
Summary: Versatile persulfate-based catalytic mechanisms induced by highly-effective single atom catalysts (SACs) have been intensively studied. However, the relationship between the different mechanisms and the properties of pollutants has been overlooked. In this study, the redox potential characteristics of eight selected pollutants were determined, and a correlation between their redox potentials and oxidation performances/pathways in the Mn-SAC/PMS system was confirmed. Based on these insights, the sources of Fenton-like systems with tunable oxidation processes can be revealed.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Engineering, Environmental
Chunlu Ding et al.
Summary: Fe, S co-doped carbon-based catalysts (Fe@SCNs) were prepared by calcination of kappa-carrageenan hydrogel cross-linked by Fe3+. Fe@SCNs showed excellent performance for activation of peroxymonosulfate (PMS), allowing complete degradation of norfloxacin (NOR) within 40 min. The doping of S elements enhanced the electron transfer capability and generated more active sites, leading to the continuous formation of more reactive oxygen species (ROS).
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Yang Zong et al.
Summary: Hindered amine-based electron paramagnetic resonance (EPR) spectroscopy is widely used to detect singlet oxygen (O-1(2)) generated in advanced oxidation processes. However, false detection of O-1(2) can occur due to the interference of reactive species, such as (OH)-O-center dot and high-valence Fe. This study reveals that EPR-based O-1(2) detection can be remarkably misled by common oxidative species and jeopardize the understanding of O-1(2).
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Chemical
Taiping Xie et al.
Summary: The rapid electron transfer is crucial for enhancing the activation of peroxymonosulfate (PMS), and MnCo2O4.5 with a cubic configuration was successfully synthesized. The MnCo2O4.5 demonstrated excellent PMS activation due to the metal-oxygen bridge bonds (Mn-O-Co) and higher electron cloud overlap. It also showed great resistance to inorganic anions and natural organic matter, efficient treatment of simulated wastewater, and high inactivation efficiency for Escherichia coli.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Environmental
Peng Xu et al.
Summary: A novel CuFe2O4/diatomite composite material was fabricated for efficient removal of typical pesticides using peroxymonosulfate (PMS) activation. The composite material showed improved reactivity and high removal efficiency towards various coexisting substances. Electrochemical measurements confirmed that the composite material enhanced the generation of reactive oxygen species, accelerating the degradation of pesticides.
Article
Engineering, Environmental
Ying Zhao et al.
Summary: This study demonstrates that the oxidation pathways of peroxymonosulfate (PMS) can be selectively regulated by controlling the d orbital electronic configuration of B-sites in delafossite structures. The orbital overlap between the B-sites and PMS determines the formation of high-spin complexes or low-spin complexes, leading to the generation of reactive oxygen species (ROSs) or electron transfer pathway for the degradation of Orange I. These findings lay a foundation for the design of transition metal-based catalysts with highly selective and efficient remediation of contaminants in water purification practice.
Article
Chemistry, Physical
Shizong Wang et al.
Summary: This study prepared carbon-supported cobalt catalyst and investigated the effect of co-pyrolysis temperature on catalytic activity. The results showed that with the increase of temperature, the catalytic activity increased. Co-C-X could activate PMS to produce various active species, but the leaching cobalt increased with temperature. Co-C-600 showed fast degradation for multiple organic pollutants and high tolerance to environmental conditions and inorganic ions.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Physical
Yunmeng Cao et al.
Summary: Sn-Bi-MOF/Ti3C2 heterojunction catalysts prepared by the solvothermal method showed excellent photocatalytic performance in the degradation and mineralization of tetracycline. The main active substances in the photocatalytic mechanism were found to be center dot O-2(-) and h(+). The catalyst maintained good catalytic ability even after four cycles of experiments, demonstrating its stability.
APPLIED SURFACE SCIENCE
(2023)
Article
Engineering, Environmental
Ruidian Su et al.
Summary: A Co3O4-activated chlorite (Co3O4/chlorite) process was developed for efficient oxidation of organic contaminants. Proton-coupled electron transfer and oxygen atom transfer were involved in Co(IV) formation and ClO2 generation in the process. The contribution of Co(IV) and ClO2 to contaminant degradation varied with pH changes, and ClO2 was transformed into non-toxic Cl- after the reaction, reducing environmental risks.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Environmental
Zhou Hongyu et al.
Summary: Accelerating Fe3+/Fe2+ circulation in Fenton reactions through redox-active polymers as electron shuttles greatly improves the efficiency of water decontamination. The introduced polymers effectively overcome the limitations of conventional reducing agents, such as self-quenching effects, heavy metal dissolution, and irreversible capacity decline. The proposed green oxidation system demonstrates high pollutant removal efficiency and long-term reducing capacity, making it a promising technology for practical organic wastewater remediation.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Green & Sustainable Science & Technology
Xin He et al.
Summary: The bimetal composite carbon material (Co & Ni/C) with carbon nanotubes was fabricated for the degradation of Bisphenol A (BPA). The Co & Ni/C-PMS system showed better catalytic performance with a BPA degradation rate of 80% - 100%. However, BPA was difficult to be completely removed by H2O2 with a mineralization efficiency below 40%. The study also discussed different degradation pathways and mechanisms and proved the reusability of Co & Ni/C.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Engineering, Environmental
Caiyun Wang et al.
Summary: In this study, carbon-based single atom catalyst with low-coordinated Co-N3 sites was synthesized to activate PMS for NOR degradation. The catalyst showed consistent high performance over a wide pH range and achieved complete degradation of NOR in different water matrixes. The contributions of high-valent cobalt(IV)-oxo species and electron transfer to NOR degradation were confirmed, and the involvement of 1O2 in the activation process was also observed. This research provides insights for the rational design of carbon-based single atom catalysts.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Chemistry, Physical
Kexin Yin et al.
Summary: Two coordination structures (Co-N4 or Co-N3) of cobalt single-atom catalysts (Co-SACs) were prepared using chitosan as a starting precursor to evaluate their effect on organic degradation. The performance of degrading carbamazepine (CBZ) and the radical/nonradical pathways in Co-N4/PMS and Co-N3/PMS systems were evaluated. Results showed that the Co-N3 catalyst produced more radicals due to stronger PMS adsorption and subsequent peroxide bond cleavage of PMS. The Co-N3 coordination also enhanced the electron-transfer process for CBZ. This study provides insights into the versatile catalytic pathways of carbon-based SACs for high-efficiency PMS activation.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Physical
Kexin Yin et al.
Summary: Developing effective and cost-efficient single-atom catalysts (SACs) with Fenton-like performance through green synthesis is a pressing issue. In this study, highly atomically-dispersed iron single-atom catalysts (Fe-SACs) were successfully prepared from natural iron-rich marine algae (Enteromorpha) with iron content exceeding 1.5 wt%. The Fe-SACs derived from Enteromorpha exhibited superior activation performance based on Fe-N4-C sites, while the contribution of radicals and oxidation processes were minimal. Additionally, the Fe-SACs greatly enhanced the electron-transfer process (ETP) mechanism, enabling efficient extraction of electrons from organics and promoting catalytic activity.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Physical
Xinhao Wang et al.
Summary: Rationally regulating reaction mechanisms in Fenton-like reactions by tuning the properties of catalysts is challenging but significant. Various catalysts with different active center sizes were synthesized to realize the switching of reaction mechanisms and pollutant degradation routes in peroxymonosulfate (PMS) activation systems. The transformation of reaction mechanism from radical oxidation to nonradical oxidation was observed with the decrease of active center size. The toxicity tests indicated that the conversion from non-selective to selective oxidation resulted in lower toxicity of effluent after reaction, reducing environmental risks.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Engineering, Environmental
Lidong Wang et al.
Summary: A novel base-induced autocatalytic technique has been developed for the efficient removal of low-carbon fatty amines in wastewater treatment. The technique achieves high removal efficiency of a model pollutant, dimethylamine, through the in situ construction of a crucial active site. This self-catalytic technology exhibits reduced toxicity, volatility, and treatment cost.
Article
Environmental Sciences
Mengyu Ma et al.
Article
Chemistry, Multidisciplinary
Yanan Shang et al.
Summary: Metal-based catalysts with different sizes, including metal nanoparticles and single atom catalysts, exhibit excellent catalytic activities in various Fenton-like reactions. However, the instability of their surface/structure is a critical issue, leading to rapid deactivation and failure in long-term operation. It is necessary to analyze the catalytic stability of these catalysts in the presence of versatile peroxides (H2O2, peroxymonosulfate (PMS), and peroxodisulfate (PDS)). Additionally, strategies for catalyst regeneration and recyclability improvement are important for practical applications of metal-based catalysts.
CHINESE CHEMICAL LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Xiongbo Dong et al.
Summary: Single atom catalysts (SACs) have emerged as a hot topic in environmental remediation. This study presents a novel Si, N co-coordinated cobalt SAC with a 3D free-standing architecture, which is tailored using natural mineral diatomite as a Si source and porous template. The catalyst exhibits excellent performance in peroxymonosulfate activation for wastewater treatment, surpassing previously reported catalysts. The work provides a new strategy for SACs development and enhances the understanding of the role of templates in spatial coordination configuration of SACs.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Review
Engineering, Environmental
Wei Ren et al.
Summary: This review discusses the use of persulfate-based nonradical oxidation processes (PS-NOPs) in wastewater purification, focusing on recent advances in nonradical electron-transfer regimes, including design of catalysts, in situ/operando characterization/analytics, and understanding the origins of electron-transfer mechanisms. The study found that persulfate is activated by a catalyst to form surface activated complexes, which interact directly or indirectly with target pollutants for oxidation.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Engineering, Environmental
Yiyuan Yao et al.
Summary: Single oxygen-based advanced oxidation processes show great promise in selectively degrading organic pollutants. However, achieving efficient production of O-1(2) through tailored catalyst design for selective oxidation of contaminants remains challenging.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Engineering, Chemical
Jianke Tan et al.
Summary: A new type of defect carbon encapsulated magnetic metallic Co nanoparticles (Co@DC) was prepared and shown to efficiently activate peroxymonosulfate (PMS) for the degradation of dyes. The Co@DC exhibited good magnetism, stability, and activation ability across a wide pH range. The mechanism of PMS activation and degradation pathway of the dye were also investigated.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Engineering, Environmental
Mengfan Luo et al.
Summary: Current research is focused on enhancing the oxidation activity of ferrate (Fe(VI)) by introducing additional energy or reducing agents. Interestingly, colloid manganese dioxide (cMnO(2)) is found to promote Fe(VI) removal of various contaminants through a surface-promoted pathway. The study suggests that high-valent Fe species are the main oxidants in the cMnO2-Fe(VI) system, and Fe(VI) can combine with vacancies in cMnO(2) to generate Fe(IV)/Fe(V). The decay products of Fe(VI) play a vital role in further enhancing the formation of Fe(IV) and Fe(V). Furthermore, cMnO(2) shows superior catalytic stability in complex waters, making it a promising reductant for Fe(VI) activation.
Article
Engineering, Environmental
Mengmeng Wu et al.
Summary: The co-existence of organic fulvic acid (FA) and inorganic montmorillonite colloid (MONT) can enhance the transportation of nHAP and Cd(II) by improving their stability and electrostatic repulsion with sand particles. The amount of adsorbed species and transport behavior of Cd(II) is also affected by the co-existence of FA or MONT.
Article
Chemistry, Physical
Jiaqi Sun et al.
Summary: This study achieved simultaneous removal of refractory berberine chloride (BC) and ammonium nitrogen (NH4+-N) in a visible-light-driven marine photocatalytic fuel cell/peroxymonosulfate (PFC/PMS) system. Under optimized conditions, the system showed high removal efficiency and electricity generation, demonstrating potential for marine wastewater treatment.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Engineering, Environmental
Mengxue Yang et al.
Summary: In this study, the origins of selectivity in single-atom catalysts (SACs) based peroxymonosulfate (PMS) systems were investigated using experimental and theoretical approaches. The results showed that pollutants with high redox potential were primarily degraded by free radicals, while pollutants with low redox potential were predominantly degraded through the nonradical electron transfer pathway (ETP). Furthermore, the contribution of radical and nonradical pathways could be controlled by the loading of PMS.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Engineering, Environmental
Anhong Cai et al.
Summary: In this study, UV-LED/persulfate (PS)/Fe(III) and UV-LED/peroxymonosulfate (PMS)/Fe(III) processes were developed to remove p-arsanilic acid (p-ASA) and immobilize the formed inorganic arsenic via tuning solution pH. UV-LED/PMS/Fe(III) process showed the best performance for p-ASA degradation at pH 3.0. Solution pH, Fe(III) and PMS (PS) dosages, as well as SO(4)(2-) and HCO3- concentrations significantly influenced the oxidation performance of p-ASA.
Article
Engineering, Environmental
Kelly J. Rivenbark et al.
Summary: The study investigates the use of chlorophyll-amended montmorillonite clays to address high levels of benzene contamination after disasters. The results indicate that the addition of chlorophyll improves the binding profile and detoxification ability of the clays, while also protecting sensitive organisms from benzene toxicity.
Article
Chemistry, Physical
Shouchun Ma et al.
Summary: In this study, a yolk@shell nanoreactor was designed with abundant hollow CoO nanoparticles and Co, N co-doped graphitized carbon as the shell. The nanoreactor achieved high activation efficiency and degradation performance in Fenton-like reaction, while reducing metal leaching and adapting to various environmental conditions.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
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Pijun Duan et al.
Summary: We present a chainmail catalyst for the elimination of organic micropollutants. Our study reveals that an electron transfer process dominates the degradation of pollutants and introduces a novel electron shuttle mechanism. Additionally, we demonstrate the deposition of the catalyst on a commercial ceramic membrane using a spray-crosslinking method, which maintains water flux and exhibits excellent stability and removal performance.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Engineering, Environmental
Baolv Hua et al.
Summary: The design of N-doped carbon-based nanomaterials for efficient heterogeneous activation of peroxymonosulfate (PMS) for environmental remediation has drawn the attention of researchers. In this study, N-doped porous carbon-encapsulated Co nanoparticles were successfully prepared by pyrolyzing the zeolite imidazolium framework (Co-ZIF-8) @ anionic polyacrylamide (APAM) network composite. The obtained nanomaterials showed excellent efficiency and stability in breaking down tetracycline hydrochloride (TC center dot HCl) using activated PMS. The CZA-1000/PMS system achieved a separation efficiency of 99.8% within 30 minutes.
CHEMICAL ENGINEERING JOURNAL
(2022)
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Yahan Yu et al.
Summary: In this study, a highly efficient E-peroxone process with graphite felt as ODE was developed for the simultaneous removal of pharmaceutical contaminants and inactivation of pathogenic microorganisms in real hospital wastewater. The TOC removal rate of real hospital wastewater could reach 93.9% under optimal conditions. Furthermore, 110 pharmaceutical compounds were efficiently degraded in the E-peroxone system, demonstrating its effectiveness in eliminating pharmaceuticals. The E-peroxone process also exhibited excellent disinfection effects and could completely inactivate Escherichia coli in the hospital wastewater.
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(2022)
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Zhen Liu et al.
Summary: This study synthesized an iron-carbon nanocomposite catalyst loaded with MoO2, which improved the catalytic performance of iron-based materials by promoting the Fe2+/Fe3+ cycle and enhanced the degradation efficiency of bisphenol S. The experimental results showed that this catalyst had great potential in sulfate radical-based advanced oxidation processes.
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Engineering, Environmental
Xiwen Liu et al.
Summary: The addition of Benzoquinone (BQ) into the Fe3S4/PMS system can effectively enhance the degradation and mineralization of bisphenol A (BPA). The active complexes (BQ-PMS*) formed by BQ and PMS on the surface of Fe3S4 can oxidize BPA, revealing the positive role of BQ in the heterogeneous activation of PMS for the first time.
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Aiwen Wang et al.
Summary: This study successfully addresses the limitations of adsorption technology in fully mineralizing pollutants and the potential health risks from metal ion leakage. A micro-nanoreactor structure is designed with glutaraldehyde crosslinked chitosan as the backbone and encapsulated MOF-derived Co-Fe nitrogen-doped graphitic carbon as the activated PMS reaction center (Co-Fe/NC@GCS). High concentration sulfamethoxazole can be efficiently enriched through electrostatic attraction and hydrogen bonding, and a small amount of PMS can be rapidly activated.
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Kelly J. Rivenbark et al.
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Mengke Li et al.
Summary: In this study, the degradation of commonly used flotation reagents for metal sulfide ore flotation in mineral processing wastewater was investigated using advanced oxidation process with peroxymonosulfate as oxidants and modified manganese slag as catalyst. The results showed high degradation rates for the reagents, with differential behaviors correlated to their structures. The system demonstrated effectiveness in removing organic pollutants with high mineralization degrees.
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JOURNAL OF HAZARDOUS MATERIALS
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Alex Kugler et al.
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Review
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