JOURNAL OF HAZARDOUS MATERIALS
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2022
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IF 14.224
Yang Liu,Fenxian Cun,Dongqi Tian,Peng Zhou,Yue Yuan,Zhaokun Xiong,Chuanshu He,Ye Du,Zhicheng Pan,Bo Lai
Sodium bismuthate dihydrate (NaBiO 3 .2 H 2 O, NBH) nanosheets were successfully prepared in this study using the persulfate oil bath oxidation method. Benefited from the unique layered structure of NBH, the Fe(III) as a variable valence metal ion was explored for enhancing NBH activation of peroxymonosulfate (PMS) to degrade levofloxacin (LVF) in the visible-light catalytic system. Based on results of the reactive oxygen species (ROS) quenching experiments and electron paramagnetic resonance (EPR) analysis, singlet oxygen ( 1 O 2 ) and superoxide radical (O 2 ·- ) were identified as the main ROS. The morphology, chemical structure, and optical properties of NBH were analyzed using various characterization methods. It was confirmed that Fe(III) embedded in the NBH via the ion exchange with Na, resulting in lattice oxygen vacancies on the surface of the NBH, after the formation of oxygen defect sites, reacts with PMS in the solution to produce active oxygen species with oxidizing efficiency. This study expands the technological application of NBH in the catalytic oxidation of variable valence metals, which are essential for the removal of fluoroquinolone antibiotics.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Sheng-Nan Zhuo,Hong-Yu Ren,Guang-Li Cao,Guo-Jun Xie,De-Feng Xing,Nan-Qi Ren,Bing-Feng Liu
In this study, an encapsulated nanoscale zero-valent iron biochar (BC-Fe 0 ) derived from waste lignocellulose rice straw (RS) was synthesized. BC-Fe 0 has excellent properties, including long-term stability, a large specific surface area, many micropore structures, active defects active and oxygen-containing groups. The material was first used to activate persulfate (PDS), showing a highly efficient catalysis for acetaminophen (ACT) degradation. The removal efficiency of ACT within 20 min reached 100%, and the degradation rate constant ( k obs ) reached 0.37475 min −1 at the ACT concentration of 10 mg/L, BC-Fe 0 of 0.5 g/L, temperature of 298 K. EPR demonstrated that ·OH, SO 4 −· , ·O 2 − and 1 O 2 occurred during the reaction process, and ·O 2 − , 1 O 2 and electron transfer played major roles in PDS/BC-Fe 0 system. Fe 0 nanoparticles promoted the activation of PDS to generate ·O 2 − , which induced a series of other reactive oxygen species (ROS) to attack ACT. C = O might also contribute to the production of 1 O 2 . In addition, graphitic carbon, C–O, defects and micropores on BC-Fe 0 together created a rich electron environment, which is conducive to the redox reaction between ACT and ROS. Satisfyingly, BC-Fe 0 not only had a high catalytic activation capacity, but also exhibited a desirable durability and recyclability. The development of BC-Fe 0 catalysts and the study of PDS activation for organic pollutant degradation are significant to biomass conversion and advanced oxidation processes in environmental remediation.
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CERAMICS INTERNATIONAL
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2022
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IF 5.532
Chuanqiang Li,Xiang Liu,Xinyu Yang,Tao Peng,Yuqin Li,Maowen Chen,Chuanchuan Lin,Jing Jiang,Ziyu Su,Weijian Kong,Yang Wang
Tetragonal multilayered ZnO/CuO composites prepared by the annealing of a Zn- and Cu-containing pillar-layered metal-organic framework were characterized by using instrumental techniques and investigated as catalysts for the degradation of 4-nitrophenol (4-NP) under irradiation with UV–vis light. The as synthesized samples contained p-n junctions, amorphous-crystalline heterojunctions , which benefitted light absorption and charge separation. The calcination temperature significantly influenced both the physicochemical properties and photocatalytic activities of these composites. The sample obtained at 400 °C (TL-ZC-400) exhibited the best photocatalytic performance, achieving a 4-NP degradation efficiency of 93.93% after 40 min of illumination. The TL-ZC-400 still showed high photodegradation ability (97.2%) after four times recycling. Furthermore, the recombination of ZnO and CuO adjusted the band gap structure of TL-ZC-400. Radical trapping experiments showed that the degradation of 4-NP was mainly mediated by hydroxyl radicals and holes. A possible photocatalytic mechanism was also proposed in this study.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2022
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IF 9.136
Jiajia Long,Tingting Ren,Jun Han,Najun Li,Dongyun Chen,Qingfeng Xu,Hua Li,Jianmei Lu
Piezocatalysis converting mechanical energy into chemical energy is deemed as an emerging technology for degradation of organic pollutants in water or air. In this work, BiFeO 3 @CdS nanofibers with heterostructure and enhanced piezoelectric response were prepared for efficient piezocatalytic degradation of organics in water. The optimal BiFeO 3 @CdS-10% achieved nearly complete removal of bisphenol A (BPA) within 60 min with the degradation rate constant of 0.098 min −1 , which was 9.4 and 4.9 times higher than that of pristine BiFeO 3 and CdS, respectively. The excellent piezocatalytic activity of the composite can be attributed to the construction of heterojunction and the enhanced piezoelectric response from the synergistic effect of the two piezoelectric components, which can accelerate the internal transfer of free carriers. It gives an insight into the feasible construction of efficient piezocatalysts and opens up a new way for BiFeO 3 -based piezoelectric materials to be utilized in purification of wastewater.
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高影响因子
APPLIED SURFACE SCIENCE
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2022
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IF 7.392
Zihui Jia,Yangyang Lv,Yu Guo,Qiaohui Gao,Hexiang Lan,Aimal Khan,Aihua Xu,Xiaoxia Li
The abundant and low-cost manganese oxides have attracted increasing interest in peroxymonosulfate (PMS) activation. Nevertheless, the low zeta potentials and surface area of the catalysts lead to weak adsorptions of PMS and pollutants under neutral and basic conditions, and thus the low degradation efficiency. Herein, a promising hybrid from graphite nanosheets (GNs) and cryptomelane-type manganese octahedral molecular sieves (OMS-2) was developed by a simple redox method at room temperature. The catalysts possessed a high surface area and a great number of surface defects , which enhanced the adsorption of PMS; while the introduction of GNs increased the capacity of pollutants adsorption and the rate of electron transfer. Compared with pure OMS-2 and other catalysts, the hybrid catalyst showed a much higher performance for acid orange 7 degradation at pH 8.2 with a first-order rate constant of 0.414 min −1 , due to the above synergistic effects between OMS-2 and GNs. Based on quenching experiments, PMS decomposition and degradation of pollutants with different oxidation potentials, a direct electron transfer process through Mn-O-PMS complexes was identified to contribute the degradation. Moreover, a galvanic oxidation system was set up to further confirm the occurrence of the mechanism. Overall, this work provides an important step in developing Mn-based hybrids for organic pollutants degradation.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2022
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IF 9.136
Li Chen,Tahir Maqbool,Wanyi Fu,Yulong Yang,Congyu Hou,Jianning Guo,Xihui Zhang
In this study the performance of catalytic ceramic membranes in activating peroxymonosulfate (PMS) for the degradation of emerging organic contaminants (EOCs) was investigated. The catalytic ceramic membrane (MnCM) integrated with Mn 2 O 3 nanoparticles was fabricated by a solid-state sintering method. Physical and chemical properties of MnCM were characterized by SEM/EDX, XRD, BET, AFM and XPS. The MnCM/PMS system has shown excellent decontamination efficiencies (81–97% removal) for different EOCs. Acetaminophen (APAP) has been efficiently degraded by MnCM/PMS in different real water matrices and harsh water conditions. Based on results of quenching experiments and electron paramagnetic resonance (EPR) analyses, non-radical pathway with singlet oxygen ( 1 O 2 ) was the dominant ROS for the degradation of EOCs. The membrane pores in active layer acted as micro-reactors for the interaction among active sites, PMS, and EOCs. The MnCM/PMS system showed outstanding catalytic stability with high mineralization (TOC removal of ∼ 65%) and negligible leaching of the manganese (1.3–1.5 µg/L) in permeate. Hydroxylation and C-N bond cleavage were found to be the main degradation pathways of APAP by MnCM/PMS system. The MnCM prepared in this study with excellent performance could be a way forward for applications at large-scale or full-scale water systems suffering from heavy loads or trace amount of refractory organic compounds.
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高影响因子
Journal of Environmental Sciences
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2022
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IF 6.796
Ruijie Xie,Dongxue Lei,Xiaowen Xie,Ziyi Suo,Dennis Y.C. Leung,Jianping Cao,Fang Ruimei,Haibao Huang
Vacuum ultraviolet (VUV) photolysis is a facile method for volatile organic compounds (VOCs) elimination, but is greatly limited by the relatively low removal efficiency and the possible secondary pollution. To overcome above drawbacks, we developed an efficient method for VOCs elimination via VUV photolysis coupled with wet scrubbing process. In this coupled process, volatile toluene, a representative of VOCs, was oxidized by the gas-phase VUV photolysis, and then scrubbed into water for further oxidation by the liquid-phase VUV photolysis. More than 96% of toluene was efficiently removed by this coupled process, which was 2 times higher than that in the gas-phase VUV photolysis. This improvement was attributed to the synergistic effect between gas-phase and liquid-phase VUV photolysis. O 3 and HO • are the predomination reactive species for the toluene degradation in this coupled process, and the generation of O 3 in gas-phase VUV photolysis can efficiently enhance the HO • production in liquid-phase VUV photolysis. The result from in-situ proton transfer reaction ionization with mass analyzer (PTR-MS) further suggested that most intermediates were trapped by the wet scrubbing process and efficiently oxidized by the liquid-phase VUV photolysis, showing a high performance for controlling the secondary pollution. Furthermore, the result of stability test and the reuse of solution demonstrated that this coupled process has a highly stable and sustainable performance for toluene degradation. This study presents an environmentally benign and highly efficient VUV photolysis for gaseous VOCs removal in the wet scrubbing process.
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高影响因子
ACS Applied Bio Materials
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2022
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IF 0
Tianran Lin,Gaoyan Jiang,Danxuan Lin,Yunping Lai,Li Hou,Shulin Zhao
Bacitracin (an antimicrobial peptide, AMP)-modified dextran-MoSe2 nanosheets (AMP/dex-MoSe2 NSs) were constructed and applied for low-temperature and synergetic antibacterial applications. The near-infrared (NIR) photothermal and peroxidase-like activities of dex-MoSe2 were combined with the bacterial membrane-binding ability of AMP through electrostatic adsorption, and a multimode antibacterial method was realized. H2O2 was converted into a hydroxyl radical (·OH) by AMP/dex-MoSe2, which exhibits a higher antibacterial activity and can avoid the toxicity of a high concentration of H2O2. Importantly, the production of ·OH and the antibacterial efficiency of AMP/dex-MoSe2 were accelerated by low-temperature heat sterilization with NIR irradiation. Owing to the AMP-guided binding and destruction effect to the bacterial membrane, AMP/dex-MoSe2 shows a better antibacterial effect on Gram-negative Escherichia coli under NIR irradiation as compared to catalytic treatment or NIR photothermal sterilization alone. Furthermore, the cytotoxicity and hemolysis of AMP/dex-MoSe2 were weak and in a relatively safe range. This multimode antibacterial strategy based on the AMP/dex-MoSe2 nanozyme will pave a way for the development of more safe and efficient antibacterial applications.
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WATER RESEARCH
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2022
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IF 13.4
Haolin Xu,Rundong Chen,Sheng Liang,Zhenchao Lei,Wenxiao Zheng,Zhang Yan,Jianxin Cao,Chaohai Wei,Chunhua Feng
The formation of chlorinated byproducts represents a significant threat to the quality of the effluent treated using electrochemical advanced oxidation processes (EAOPs), thus spurring investigation into alleviating their production. This study presents a new strategy to minimize the release of chlorinated intermediates during the electrochemical oxidation of Ni-EDTA by establishing a dual mixed metal oxide (MMO)/Fe anode system. The results indicate that the dual-anode system achieved a substantially higher rate (0.141 min − 1 ) of Ni-EDTA destruction and accordingly allowed a more pronounced removal of aqueous Ni (from 39.85 to 0.63 mg L − 1 ) after alkaline precipitation, compared with its single MMO anode (0.017 min − 1 of Ni-EDTA removal, with 14.38 mg L − 1 Ni remaining) and single Fe anode (insignificant Ni-EDTA removal, with 38.37 mg L − 1 Ni remaining) counterparts. Compared to reactive chlorine species (RCS) produced from the single MMO anode system, Fe(IV) was in situ generated from the dual-anode system and was predominantly responsible for the attenuation of chlorinated byproducts and thus the decrease in the acute toxicity of the treated solution (evaluated using luminescent bacteria). The Fe(IV)-dominated dual-anode system also exhibited superior performance in removing multiple pollutants (including organic ligands, Ni, and phosphite) in the real electroless plating effluent. The findings suggest that the strategy for Fe(II) transition to Fe(IV) by active chlorine paves a new avenue for yielding less chlorinated products with lower toxicity when EAOPs are used to treat chloride-containing organic wastewater.
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JOURNAL OF HAZARDOUS MATERIALS
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2022
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IF 14.224
Guilu Zeng,Rumin Yang,Shuang Tian,Zelong Zhou,Qi Wang,Xiu Yu,Rongbing Fu,Shuguang Lyu
In this work, the effect of different desorbents (low molecular weight organic acids (LMWOAs), surfactants, and inorganic salts) on naphthalene (NAP) desorption in soil was investigated, and the results showed that NAP desorption pattern fitted the pseudo-second-order kinetics. The addition of LMWOAs, especially citric acid (CA), could stimulate the reactive oxygen species (ROS) generation and NAP degradation in Fe(II) activated persulfate (PS) system, while the presence of surfactants and CaCl 2 could inhibit the NAP removal due to the competitive consumption of ROS. The maximum removal of NAP was 97.5% within 120 min at the PS/Fe(II)/CA/NAP molar ratio of 15/5/1/1, and the pseudo-first-order kinetic constant of NAP removal increased from 0.0110 min −1 to 0.0783 min −1 with the addition of CA. Compared with surfactants and inorganic salts, LMWOAs, especially CA, were more suitable as desorbent in soil washing coupled with in situ chemical oxidation technique. Moreover, 1.86 mg L −1 desorbed amount and 36.1% removal of NAP from soil could be obtained with the presence of 1 mM CA. Finally, the significant removal of NAP and other contaminants (phenanthrene, fluoranthene , and benzene series) in actual groundwater could provide theoretical basis and technical support for the remediation of organic contaminated sites with desorbents.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2022
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IF 9.136
Meng Wu,Minghao Xu,Jiaojiao Yang,Yun Wang,Bin Lu,Hui Liu,Rufen Chen
The elimination of pharmaceutical wastewater has aroused great attention because of its environmental and ecological significance. In this work, an efficient photo-assisted FeP/peroxodisulfate (PDS) system was constructed and applied to the degradation of antibiotic. About 98.47 % Metronidazole (MNZ) could be removed by FeP/PDS after 20 min at its natural pH under the irradiation of 10 W fluorescent. The SO 4 •− , HO • and O 2 •− radicals were involved in MNZ degradation, in which SO 4 •− played the major role. Both Fe δ+ and P δ– in FeP as well as surface oxidized ≡Fe 2+ could be used as activity sites to activate PDS. The rate-determining step of Fenton-like reaction (M (n+1)+ → M n+ ) can be accelerated through internal electron transfer of FeP. Moreover, the Fe 2 O 3 /FeP hetero-structure on the surface of FeP particles also took part in PDS activation under light irradiation. This finding illustrates a potential utilization of metal phosphide as a photo-assisted Fenton-like catalyst to remove organic pollutants in the environment.
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高影响因子
APPLIED SURFACE SCIENCE
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2022
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IF 7.392
Yuanhong Xie,Chenrui Liu,Dejian Li,Yun Liu
Herein, a novel composite of MIL-101(Fe) loaded with nitrogen doped carbon quantum dots (NCQDs/MIL-101(Fe), denoted as NQML), which can construct dual effect of photocatalysis and photo-Fenton for organic pollutants removal, was prepared by solvent impregnation method. Characterization methods proved that NQML had been synthesized successfully. Additionally, the adding volume of NCQDs could effectively influence the photocatalytic activities of NQML-x composites (x represents the adding volume of NCQDs) for tetracycline (TC) degradation, and NQML-8 exhibited the optimum photocatalytic performance among the studied catalysts upon visible light illumination under natural pH, which can completely degrade TC within 180 min. By comparison, the TC degradation kinetic constant in the system with NQML-8 was as 15.85 and 8.24 folds of that in the NCQDs and MIL-101(Fe) systems, respectively. The mechanism study proved that the enhanced photocatalytic performance of NQML was resulted from the visible light up-conversion property, electron-hole separation and transfer capacity of NCQDs. Meanwhile, NQML could not only produce h + but also lead to in-situ generation of O 2 - and H 2 O 2 by activation of O 2 under visible light. The generated H 2 O 2 could react with Fe(II) in MIL-101(Fe) to produce OH so as to construct a dual effect of photocatalysis and photo-Fenton in TC removal.
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高影响因子
危险品化学品经营许可证（带存储）