CHEMOSPHERE
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2022
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IF 8.943
Jie Zhao,Fei Wu,Qiang He,Yawei Feng
Construction of Bi 2 FeNbO 7 /bisulfite system for abatement of pharmaceutical residue was achieved. An attempt to synthesize Bi 2 FeNbO 7 through hydrothermal technique was confirmed by X-ray diffraction. The magnetic field experiment revealed that Bi 2 FeNbO 7 possessed a saturation magnetization of 6.99 emu/g, indicating magnetic attributes of Bi 2 FeNbO 7 . Scanning electron microscopy images showed that Bi 2 FeNbO 7 exhibited regular octahedra in the size of 200–300 nm. In a self-made device, the activation of sodium bisulfite using Bi 2 FeNbO 7 for the disposal of amiloride has been carefully explored. The effects of solution pH, sodium bisulfite concentration, Bi 2 FeNbO 7 dosage, amiloride concentration, coexisting ions, and water matrix on the performance of Bi 2 FeNbO 7 /bisulfite system was investigated. The catalytic performance of Bi 2 FeNbO 7 /bisulfite to degrade amiloride was considerably higher than that of traditional iron oxides . The maximum removal efficiency of amiloride was 97.9% in Bi 2 FeNbO 7 /bisulfite process. The involvement of Fe might be crucial for activating bisulfite to create active species. The dominating radical in Bi 2 FeNbO 7 /bisulfite process was identified as SO 3 •‒ . With the help of UHPLC/MS/MS, three new degradation products of amiloride were found. Dehalogenation and deamination of amiloride might account for the formation of these transformation products . This work provides a highly efficient Bi 2 FeNbO 7 /bisulfite process for the disposal of pharmaceutical pollutants in water treatment .
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2022
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IF 9.965
Guohao Xu,Wenjuan Zhang,Juan Du,Xiaoling Yuan,Wenxiang Zhang,Wenfu Yan,Gang Liu
Degradability is a key safety issue when choosing materials for biomedical applications and environmental protection. This factor greatly limits the application of porous carbon in these areas due to the inert and stable nature of carbon network. In this work, this conflict could be well-resolved by rational designing a mesoporous carbon (MC) with biomass as a carbon source. The retained oxygen-containing species simultaneously increase drug adsorption capacity and the degradability of MC. The maximum adsorption quantity for doxorubicin over MC can reach 395.3 mg/g, about 3-fold over carbon nanotubes. The detailed analysis reveals that the degradation of MC occurs via a radical mediated oxidation process. The high electron density feature of MC facilitates the electrophilic addition reaction in the presence of HO . During this process, the carbon network is gradually degraded into fragments, carbon nanodots and ultimately to CO 2 . This work opens up a new way to fabricate degradable porous materials and provides a promising material for the practical application in biomedical and environmental field.
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2022
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IF 24.319
Xinliang Liu,Jilong Mo,Wanhai Wu,Hainong Song,Shuangxi Nie
The generation of free radicals was enhanced by triboelectric pulsed direct-current during the organic pollutant degradation. The self-powered electrochemical system was constructed for enhancing 4-CP removal powered by a water-driven triboelectric nanogenerator (WD-TENG). The output of current, voltage, and power of WD-TENG were studied. The removal of 4-CP and its degradation mechanism were also discussed. The results shows that the formation of hydroxyl radicals (·OH) was improved by improving PMA(Mo 5+ ) conversion efficiency by the WD-TENG in the phosphomolybdic acid/H 2 O 2 (PMA/H 2 O 2 ) system, resulting the mineralizing the 4-CP via dichlorination and oxidation . The removal of 4-CP improved by 10% in 120 min in the WD-TENG powered electro-PMA/H 2 O 2 system. This study provides a promising methodology for improving the performance of self-powered electrochemical processes for the treatment of environmental pollution.
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JOURNAL OF HAZARDOUS MATERIALS
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2022
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IF 14.224
Yanchun Huang,Leiduo Lai,Weifang Huang,Hongyu Zhou,Jun Li,Chao Liu,Bo Lai,Naiwen Li
In this study, natural molybdenite (MoS 2 ) was applied to activate peroxymonosulfate (PMS) for the removal of atrazine (ATZ) and its degradation mechanism was investigated. Molybdenite exhibits superior catalytic performance. The best condition for atrazine degradation efficiency (>99%) was obtained with molybdenite concentration of 0.4 g/L, PMS concentration of 0.1 mM, and ATZ concentration of 12 μM within 10 min under experimental conditions. Electron paramagnetic resonance (EPR) test and chemical probe test further proved that HO • and SO 4 •− played important roles in the molybdenite/PMS system, and SO 4 •− was dominant. Meanwhile, Electron paramagnetic resonance (EPR) and X-ray photoelectron spectroscopy (XPS) tests showed that sulfur vacancies and edge sulfur played important roles in the system. Edge sulfur was conducive to Mo 4+ exposure, while sulfur vacancy facilitated electron transfer and reduced Mo 6+ back to Mo 4+ . Combined with DFT calculation, the role of sulfur in the degradation process was verified. Besides, five ATZ degradation pathways were proposed. Finally, the degradation ability of the molybdenite/PMS system for different pollutants and in actual water bodies was also explored. This work provided ideas for exploring the degradation of organic contaminants by natural minerals.
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高影响因子
WATER RESEARCH
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2022
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IF 13.4
Shengli Wang,Shuzhao Pei,Jinna Zhang,Junqiang Huang,Shijie You
Benzotriazole (BTA) is a widely used anticorrosive additive that is of endurance, bioaccumulation and toxicity, and BTA industrial wastewater treatment remains a challenge. This study reports efficient electrochemical removal of BTA by titanium oxide (TiSO) electroactive ceramic membrane (ECM), indicated by 98.1% removal at current density of 20 mA∙cm−2 and permeate flux of 692 LHM under cathode-to-anode flow pattern (1 h). Electrochemical analysis demonstrated the pH-dependent formation of anti-corrosive BTA film on the TiSO anode, which was responsible for improved BTA removal for cathode-to-anode (CA) flow pattern compared with that for anode-to-cathode (AC). The modelling results showed the CA flow pattern to be more favourable for BTA oxidation mediated by electro-generated •OH by preventing the formation of deactivation film via creating an alkaline boundary layer at the anode/electrolyte interface. Intermediates and essential active sites were identified by using experimental analysis and theoretical density functional theory (DFT) calculations, thereby the most likely degradation pathways were underlined. Toxicity analysis revealed remarkable decrease in oral rat LD50 values and bioaccumulation factor during electrochemical degradation of BTA. This study provides a proof-in-concept demonstration of effective removal for anti-corrosive emerging pollutants by TiSO-ECM under flow-through pattern.
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高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2022
·Vol. 29
·期 48
·72764-72776
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IF 5.19
Zhong Dan,Feng Weinan,Ma Wencheng,Liu Xinyue,Ma Jun,Zhou Ziyi,Du Xuan,He Fu
Goethite and lepidocrocite, as the main compositions of pipe deposits in the water distribution network, could be used as a catalyst for advanced oxidation processes (AOPs). This research utilizes them to activate PDS/H 2 O 2 and PMS/H 2 O 2 degrading the 2,4,6-trichlorophenol, respectively. To describe the incomplete degradation of pollutants and reflect the induction period, a modified first-order model has been proposed and used to analyze degradation differences under several key affecting factors. The results revealed that the PDS/H 2 O 2 system has a synergy effect in the 2,4,6-trichlorophenol degradation process. The possible degradation pathways and intermediate products were confirmed by gas chromatograph-mass spectrometry (GC–MS). The paper provides a new idea for the effective use of pipe deposits to remove chlorophenols from drinking water, which is of great significance to ensure water quality safety.
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APPLIED CATALYSIS A-GENERAL
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2022
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IF 5.723
Yan Ding,Kangping Cui,Xueyan Liu,Chen-Xuan Li,Zhi Guo,Minshu Cui,Yihan Chen
Herein, a new axial g-C 3 N 4 coordinated iron(III) phthalocyanine (FeP/CN) was fabricated for peroxymonosulfate (PMS) activation. Around 100% degradation of acetaminophen (AP), 2,4-dichlorophenol (2,4-DP), sulfadiazine (SDZ), and methyl orange (MO) (30 mg L -1 ) were achieved within 20 min by adding 0.02 g L -1 FeP/CN 5 (3.62 wt% Fe) and 0.2 mM PMS. High-valent iron-oxo species (Fe IV =O) was demonstrated as the main reactive species, which mediated a two-electron transfer process with pollutants. Characterizations and computational analysis revealed that the axial g-C 3 N 4 ligand provided Fe(III) coordination environments to generate Fe IV =O species directly through PMS activation, and increased the reactivity of the Fe IV =O species in pollutants oxidation due to the narrowed HOMO-LUMO gap. Besides, small displacement of Fe atom (0.23 Å) from the macrocycles plane due to the axial g-C 3 N 4 ligand decreased the iron demetalization rate from 3.54% to 0.28% in the catalyst/PMS system. This work offered an excellent strategy to design high-efficiency catalysts for Fe IV =O generation.
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JOURNAL OF MEMBRANE SCIENCE
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2022
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IF 10.53
Li Chen,Tahir Maqbool,Ghazanfar Nazir,Congyu Hou,Yulong Yang,Jianning Guo,Xihui Zhang
Endocrine disrupting compounds (EDCs) in the aquatic systems are of growing concerns that could undermine drinking water safety. In this study, manganese (III) oxide (Mn 2 O 3 ) based catalytic ceramic membrane (CCM) was developed for the activation of peroxymonosulfate (PMS), and its applicability has been tested in degrading the ten different EDCs (including bisphenol analogs (BPs)) in drinking water. The CCMs were synthesized at different calcination temperatures i.e., 850, 950, and 1150 °C. Optimal performance of CCMs/PMS was achieved at a higher degree of calcination. The CCMs/PMS has shown a potential to effectively degrade the EDCs at higher concentrations (mg/L) to trace levels (ng/L). The CCMs/PMS system adopted a non-radical pathway of degrading the EDCs through the extensive generation of singlet oxygen ( 1 O 2 ), as confirmed using quenching experiments and electron paramagnetic resonance (EPR) spectroscopy. 1 O 2 -based oxidation process showed special selectivity for the decontamination of phenols and bisphenols. The long-term performance of CCMs/PMS showed good stability in degradation of the EDCs in drinking water, also with efficient mineralization (TOC removal >55%) and negligible release of Mn (0.004 wt%Mn/min). CCMs/PMS system also showed high potential in improving water quality by reducing the disinfection byproducts (DBPs) formation potential, highest recorded for bromodichloromethane (CHCl 2 Br, 100%) and lowest for dichloroacetic acids (TCAA, ∼50%). The study provided a highly efficient catalytic ceramic membrane based advanced oxidation process (AOPs) for effective degradation multiple of EDCs in drinking water, and the findings of this work can be a baseline for full-scale water treatment applications.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2022
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IF 9.136
Wenlan Ji,Yuan Wang,Yuanjie Xiong,Tian C. Zhang,Shaojun Yuan
To strengthen the utilization of free radicals and effectively enhance electrocatalytic performance and service lifetime of the β -PbO 2 electrode, herein, a novel hydrophobic TNAs/SnO 2 /PPy/ β -PbO 2 -Ce-SDS (abbreviated as β -PbO 2 -Ce-SDS) anode was synthesized by doping Ce 3+ and anionic surfactant (SDS) to TNAs/SnO 2 /PPy/ β -PbO 2 (abbreviated as β -PbO 2 ), which was constructed by growing SnO 2 /PPy/ β -PbO 2 multilayers on TiO 2 nanotube arrays (TNAs) via combination of electrodeposition and electro-polymerization processes. Notably, co-modification with Ce 3+ and SDS remarkably enhanced the surface hydrophobicity, electrochemical performance and catalytic ability of β -PbO 2 anode. Such β -PbO 2 -Ce-SDS anode not only substantially enhanced the As(III) conversion (96.96%) in the electrocatalytic oxidation process, but also prominently strengthened its service lifetime. Furthermore, the as-prepared β -PbO 2 -Ce-SDS anode possessed an excellent stability as its kinetic constant was only reduced from 0.18 to 0.14 min −1 even underwent 10 cycles of the electrocatalytic process, while that of the unmodified β -PbO 2 electrode decreased markedly by about 49%, owing to its appropriate surface hydrophobicity, smaller grains and denser β -PbO 2 layer. The reaction mechanism of electrocatalytic oxidation was associated with synergistic effects of hydroxyl radical ( OH), superoxide radicals ( O 2 − ), and sulfuric acid root radicals ( SO 4 − ). The β -PbO 2 -Ce-SDS anode provides a novel and feasible approach to development of various electrodes by doping metal ions and/or regulating with surfactants.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2022
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IF 9.136
Xi Li,Wenwen Zhang,Zhenxue Liu,Shiwen Wang,Xiao Zhang,Baokang Xu,Peng Yu,Yanhua Xu,Yongjun Sun
Co-based heterogeneous catalysts exhibit relatively high performance on peroxymonosulfate (PMS) activation for antibiotic pollution control in water. But the aggregation and loss of active components limit their expanded application. In this study, a 3D rose-like MoS 2 was designed and synthesized to anchor Co in its special lamellar structure and achieve its high dispersion. 98.9% of tetracycline (TC) was removed within 60 min with a mineralization rate of 50.5% under neutral condition. The accelerated valence cycle between Co 2+ and Co 3+ was the key to PMS activation and TC degradation. And the lamellar structure of MoS 2 endowed the catalyst with better stability and inhibited Co leaching. The influences of common anions (Cl − , HCO 3 − , H 2 PO 4 − , and SO 4 2− ) and humic acid in aqueous solution on TC degradation were systematically investigated. The catalytic mechanism of PMS activation and the generation of reactive oxygen species (ROS) over Co@MoS 2 were deeply investigated. The reduced biotoxicity of the intermediates indicated the potential of Co@MoS 2 /PMS system for the control of environmental risks caused by TC. This work provided a new insight for the design of metal-doped heterogeneous catalyst with high stability and a new direction for the remediation of antibiotic contamination in water.
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LANGMUIR
·
2022
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IF 4.331
Jinling Li,Hui-Ling Peng,Changchun Wen,Peijing Xu,Xing-Can Shen,Cunji Gao
The therapeutic effect of photothermal therapy (PTT) and photodynamic therapy (PDT) is severely limited because of the shallow tissue penetration depth of the first near-infrared (NIR-I) light. Multifunctional nanotheranostics irradiated by the second near-infrared (NIR-II) light have received wide interest with respect to deeper tissue penetration, and sonodynamic therapy (SDT) synergistic phototherapy can achieve the complete elimination of tumors. Herein, we successfully constructed a single NIR-II light-induced nanotheranostic using cerium oxide (CeO2–x) with abundant oxygen vacancies for photoacoustic imaging-guided SDT-enhanced phototherapy for the first time. CeO2–x with surface crystalline disorder showed extensive NIR-II region absorption and an outstanding photothermal conversion ability. In addition, the CeO2–x layer with numerous oxygen defects can promote the separation of holes and electrons by ultrasound irradiation, which can remarkably enhance the efficacy of phototherapy to achieve high-efficiency tumor ablation. CeO2–x was surface modified with hyaluronic acid (HA) to prepare CeO2–x@HA to allow active tumor targeting efficiency. Both cell and animal experiments confirmed that all-in-one CeO2–x@HA exhibited a high therapeutic efficacy of SDT-enhanced PDT/PTT under 1064 nm laser irradiation, which achieved complete tumor eradication without systemic toxicity. This study significantly broadened the application of NIR-II-responsive CeO2–x for photoacoustic imaging-mediated SDT-enhanced phototherapy to the highly efficient and precise elimination of tumors.
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CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Yanan Shang,Xinning Liu,Yanwei Li,Yue Gao,Baoyu Gao,Xing Xu,Qinyan Yue
The synthesis of a highly efficient and stable single atom catalyst (SAC) for peroxydisulfate (PDS) activation remains a challenge. Herein, a reconstructed iron single atom catalyst (Fe-SAC) with both abundant conjugated π-π sp 2 structured carbon and reactive Fe-N 4 sites was first reported to improve the decomposition of organics in PDS/SACs systems. Enhanced organics adsorption can be achieved by the conjugated π-π sp 2 structured carbon via π-π interaction to decrease the migration distance of reactive species to organic molecules. In addition, PDS tended to be attached onto the Fe-N 4 sites accompanied by the peroxymonosulfate (PMS) generation via S-O breakage of PDS, accelerating the generation of radicals. As a result, organics decomposition via PDS activation by reconstructed Fe-SAC was significantly higher (∼6 times) than the conventional Fe-SAC because of the synergistic effect of the resulting dual reaction sites. This work provides a new strategy to enhance the catalytic performances in PDS/SACs systems.
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