FOOD CHEMISTRY
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2023
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IF 8.8
Xiaojuan Niu,Huanhuan He,Hang Ran,Zhen Wu,Yue Tang,Yuangen Wu
Ag 3 PO 4 nanoparticles (NPs) was prepared through a facile coprecipitation method, and was first found to have excellent laccase-mimicking catalytic activity. The study confirms that Fumonisin B1 (FB1) can effectively hinder the production of superoxide anion (O 2 − ) between Ag 3 PO 4 NPs and dissolved oxygen, and further inhibit laccase-mimicking activity of Ag 3 PO 4 NPs. Thus, a novel rapid colorimetric sensor for FB1 analysis in cereal was first established using laccase-mimicking activity as sensing signal. The absorbance variation of sensing solution is directly related to the amount of FB1, and the color change is further combined with smartphone for quantitively analysis of FB1. The limit of detection (LOD) of the sensor is determined as low as 1.73 μg·L −1 , which is far lower than the maximum residue limits (MRLs) of FB1 set by European Commission and US Food and Drug Administration (FDA). The average recovery of 87.8–104.5% for FB1 detection was obtained in cereal.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2023
·
IF 8.6
Xiaohui Fan,Jinjin Zhao,Cheng Cheng,Yin Xu,Hui Zhang
Efficient and low-cost catalysts are important for contaminant remediation in peroxymonosulfate (PMS)-based advanced oxidation processes (AOPs). In this study, a solid waste, generated by the polyferric chloride coagulation of the phenol-saturated powder activated carbon from an industrial wastewater treatment plant, was used to prepare metal/carbon composites under different pyrolysis temperatures (650–950 °C). The catalyst pyrolyzed at 950 °C (FeAC-950) exhibited the highest reactive activity for PMS activation as demonstrated by a series of electrochemical techniques. Nearly complete BPA elimination can be achieved within 60 min by 0.1 g L –1 FeAC-950 and 0.5 mM PMS. The results of electron paramagnetic resonance (EPR), chemical quenching and open circuit potential (OCPT) experiments demonstrate a combined radical and non-radical oxidation mechanism in the FeAC-950/PMS process and BPA was removed dominantly through radical pathway. Various persistent organic pollutants can be efficiently eliminated in the FeAC-950/PMS system. In addition, the present system showed good tolerance to natural organic matter as well as some common anions such as chloride and nitrate. This study dedicated a simple method to prepare an efficient solid waste-based catalyst in environmental catalysis. The outcomes will not only provide a value-added reuse approach for waste management but also facilitate the FeAC-950 applications in wastewater remediation technologies.
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ACS Applied Materials & Interfaces
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2023
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IF 9.5
Fangchao Li,Gan Miao,Zhiqiang Hou,Lide Xu,Xiaotao Zhu,Xiao Miao,Yuanming Song,Guina Ren,Xiangming Li
Solar-powered water purification is one of the promising choices for clean water production. However, it remains challenging to develop aerogel solar evaporators that simultaneously possess enhanced light-to-heat conversion, optimal thermal management, and salt crystal deposition inhibition. Herein, to address this challenge, we have developed a 3D chitosan-reduced graphene oxide/polypyrrole (CS-RGO/PPy) aerogel vaporizer with a vertical and radially aligned structure through a directional freezing process, inspired by the featured structure of conifers. The radially porous walls and vertically arranged channels within the 3D aerogel were able to facilitate high light absorption, localizing converted heat, rapid water transport, and self-salt discharge. Under 1 sun irradiation, the aerogel vaporizer displayed an improved light absorption characteristic of 95% and a high-rate evaporation (∼3.19 kg m–2 h–1) that achieved continuous freshwater from the saturated brine production without solid salt crystallization. Besides achieving seawater desalination, the obtained aerogel could purify organic wastewater and emulsions through solar distillation with high-rate continuous water production.
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PHYTOCHEMICAL ANALYSIS
·
2023
·Vol. 34
·期 5
·560-570
·
IF 3.3
Heng-Li Zhao,Run-Zhou Liu,Meng Ding,Ya-Liu Fan,Bin-Bin Lin,Hong-Wei Lu,Xiao-Dong Wen,Ping Li,Hua Yang
Introduction Lanqin Oral Liquid (LQL) is a traditional Chinese medicine preparation (TCMP) containing five herbal medicines and has been commonly used for the treatment of pharyngitis and hand-foot-and-mouth disease in clinic. The material basis of LQL has been reported in our previous study, but the contents of the major components and the features of saccharide in LQL are still unclear. Objectives This study aimed to establish accurate and rapid methods for the quantification of the major components and profiling of saccharide in LQL. The quantitative results combined with similarity evaluation were applied to improve the quality control of LQL. Methodology An ultra-high performance liquid chromatography coupled with triple-quadrupole tandem mass spectrometry (UPLC-QQQ-MS) method was utilised to determine 44 major components. Cosine similarity was used to evaluate the similarities among 20 batches of LQL based on the quantitative results of 44 major components. The physicochemical properties, structure, composition, and contents of saccharide in LQL were detected by a combination of chemical and instrumental analysis. Results A total of 44 compounds, including flavonoids, iridoid glycosides, alkaloids, and nucleosides, were accurately determined. The 20 batches of LQL were remarkably similar (> 0.95). In addition, d -glucose, galactose, d -glucuronic acid, arabinose, and d -mannose were detected in saccharide of LQL. The contents of saccharide in LQL were 13.52–21.09 mg/ml. Conclusions The established methods can be applied for the comprehensive quality control of LQL, including characterisation of saccharide and quantification of representative components. Our study will provide a robust chemical foundation for disclosing the quality markers of its therapeutic effect.
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Environmental Science-Nano
·
2023
·Vol. 10
·期 7
·1897-1906
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IF 7.3
Yang Yang,Junmin Peng,Huilin Tao,Zhou Yang,Yidong Hou,Wei Lin,Jinshui Zhang
The development of efficient catalysts is of great significance in the photocatalytic ozonation process for organic wastewater treatment. However, the effect of exposed facets and surface defects of the catalyst on the photocatalytic ozonation performance is less covered. Herein, ZnO nanocomposites with different preferentially exposed crystal facets (ZnO-rod and ZnO-disk) were synthesized and used for photocatalytic ozonation of phenol. The characterization and density functional theory calculation results demonstrated that the exposed {0001} facets and oxygen vacancies promoted the separation and transfer of photogenerated charges as well as improved the adsorption and activation of ozone molecules on the catalyst surface. Consequently, the TOC removal rate in the UV-O3/ZnO-disk process (62.4%) was much higher than those in the UV-O3/ZnO-rod process (41.3%) and the UV-O3 process (15%). Moreover, the experimental results of the identification and quenching of active species illustrated that ˙OH was more likely to be produced in the UV-O3/ZnO-disk process, while 1O2 was more likely to be formed over ZnO-rod. A large amount of ˙OH with a stronger oxidation capability than 1O2 contributed to the superiority of ZnO-disk over ZnO-rod in organic pollutant removal. This work demonstrates that the engineering of crystal facets and surface defects provides an effective strategy for constructing efficient catalysts for the photocatalytic ozonation process.
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ACS ES&T Engineering
·
2023
·
IF 7.1
Dezhen Kong,Yumeng Zhao,Hongdi Guo,Mei Han,Xinru Fan,Jinkuo Li,Xu He,Jun Ma
The demands for high-efficient and green activation of peracetic acid (PAA) have triggered research in exploring carbon catalysis. Nevertheless, the efforts in designing reaction-oriented and high-performance carbon catalysts are largely impeded by an ambiguous understanding of the fundamental carbon structure–PAA activation performance relationship. Herein, we investigated the quantitative structure–activity relationship (QSAR) of carbon nanotubes (CNTs) for PAA activation and micropollutant (MP) removal, by tuning the physiochemical properties of CNT via thermal annealing. The CNT/PAA system was dominated by the nonradical direct electron transfer (DET) oxidation pathway, showing high MP removal rates under complex water matrices. By conducting QSAR analysis, improved catalytic efficacy of the surface-regulated CNTs was attributed to the reinforced DET via the elevated oxidative potential of the CNT–PAA complex and the enhanced electrical conductivity of CNT. Furthermore, the larger specific surface area and lower oxygen content of CNT gave rise to the elevated oxidative potential of the CNT–PAA complex, while the electrical conductivity of CNT was positively correlated with the graphitization degree of CNT. Overall, this work sheds light on the influence cascade of the physicochemical properties of CNT for MP removal and PAA activation, providing guidelines for the fit-for-purpose design of the DET-mediated carbon catalysts for PAA oxidation.
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npj Clean Water
·
2023
·Vol. 6
·期 1
·1-10
·
IF 11.4
Li Meng,Song Jiayu,Han Wei,Yeung King Lun,Zhou Shaoqi,Mo Ce-Hui
Although Fenton-like reactions have been extensively used to treat various organic contaminants in wastewaters (oily wastewaters, landfill leachate, denitrification with Fenton oxidized non-degradable large molecular organic pollutants, and removal of phosphorus, etc.), the difficulty in catalyst recovery and the instability of catalytic activity limit their practical application. Herein, iron atoms were inserted in a metal-organic framework (FeNC) with dual reaction sites as highly reactive and stable electro-Fenton-like catalysts for the catalytic oxidation of organic pollutants via the electro-Fenton-like activation reaction of peroxymonosulfate (PMS) with fractional leaching of metal ions. Experiments and density functional theory (DFT) calculations indicate that FeNC with FeN 4 and Fe–Fe active sites can rapidly deliver electrons for PMS dissociation. Further, an electrolysis reactor was constructed for the on-site generation of reactive oxygen species, which can stably and continuously purify various organic wastewaters. The combined use of an electrolysis reactor and magnetic catalyst in the current study provides a direction for the long-term remediation of organic pollutants on an industrial scale.
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Journal of Materials Research and Technology-JMR&T
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2023
·
IF 6.4
Panpan Zhou,Jing Zhang,Zhi Song,Lixi Wang,Qitu Zhang
An enormous challenge exists in the development of low-density and efficient microwave absorbers with thin matching thickness. Carbon materials with hierarchical porosity are regarded as potential candidates for practical applications of microwave absorption (MA) materials on account of their rich pore structure which facilitates the entry and attenuation of electromagnetic waves. Herein, ordered mesoporous carbon with hierarchical interconnected network structure (NOMC) was prepared through a self-assembly method and calcination treatment. It was found that by adjusting the annealing temperature, the hierarchical porous structure, the carbon defect, the dielectric loss property and the MA property could be tuned. Thanks to the balance between sufficient hierarchical porous structure, outstanding impedance matching condition and multiple loss modes, NOMC displays outstanding ability to dissipate electromagnetic waves at a very thin absorbing coating thickness. Notably, as-prepared NOMC-700 displays an outstanding MA property, whose minimum reflection loss (RL min ) value reaches −27.5 dB at 16.72 GHz and the effective absorption bandwidth (EAB) achieves 3.2 GHz (14.8–18 GHz) under 1.5 mm absorbing coatings. Hence, the satisfying design in porous microstructure can pave the way for efficient MA materials with thin matching thickness.
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Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Bin Liu,Ziying Wang,Tao Wei,Zongming Liu,Jinkai Li
The transition element based N-doped carbon nanoparticles (NPs) with high catalytic activity and more active centers are regards as nanozymes with great potential for colorimetric detection and environmental degradation. Here, three-dimensional (3D) hierarchically porous of manganese-amplified Fe-N-doped carbon (Fe/Mn-N-C) catalysts with more Fe/Mn-N 4 and C-N active groups was synthesized via pyrolysis of manganese(II) acetyllacetonate/ferrocene@ZIF-8 nanocomposites . Owing to its excellent peroxidase-like (POD-like) and superoxide (SOD) mimicking properties, the Fe/Mn-N-C nanozymes were selected to rapid and accurate colorimetric detection of hydroquinone (HQ), and the detection limit was determined as 0.21 μM in range of 0–100 μM. In addition, the rapid degradation of HQ via hydroxyl radical (•OH) and superoxide anion (O 2 •- ) generated between Fe/Mn-N-C nanozymes and H 2 O 2 , and the degradation efficiency reached to over 92% under the optimum reaction conditions (pH 4.0, 100 mM H 2 O 2 ). The reaction mechanisms were systematically explored. The manganese-amplified Fe-N-C single atom nanozyme with excellent enzyme-like activity and chemical stability will propose a feasible way for accurate detection and removal of pollutants in actual production.
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Journal of Environmental Chemical Engineering
·
2023
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IF 7.7
Nguyen Quang Tung,Do Thi Cam Van,Dam Xuan Thang,Nguyen Thi Kim An,Tran Thi Trang,Bui Dinh Nhi,Nguyen Phuong Thao,Le The Son,Nguyen Nhat Huy,Nguyen Trung Dung
In this study, the CuCoFe-LDH catalyst was synthesized by hydrothermal method and applied to degrade levofloxacin (LFX) by peroxymonosulfate (PMS) activation. The physicochemical properties of the synthesized samples were analyzed by X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), Brunauer-Emmett-Teller (BET), X-ray photoelectron spectroscopy (XPS), and thermogravimetric analysis (TGA). The influence of various factors such as catalyst system, pH, catalyst content, PMS , pH, and coexisting ions on the degradation of LFX was systematically investigated. The results showed that after 10 min, 94.57 % of LFX was decomposed under the conditions of 200 mg/L of catalyst, 500 mg/L of PMS, 10 mg/L of LFX, and pH 7.0. Besides, the CuCoFe-LDH/PMS system can effectively remove LFX over a wide pH range from 3.5 to 9.0. Both radical superoxide (O 2 •- ) and non-radical singlet oxygen ( 1 O 2 ) were major reactive oxygen species in the CuCoFe-LDH/PMS system. Mass spectrometry identified 16 major degradation products of LFX, and 38.43 % of LFX was mineralized after 30 min of reaction. Besides, the CuCoFe-LDH/PMS system had the ability to effectively degrade different groups of antibiotics (e.g., fluoroquinolone, tetracycline , and sulfonamide). The mechanism of PMS activation by CuCoFe-LDH and the LFX degradation pathway were proposed. Finally, testing the reusability of CuCoFe-LDH in LFX degradation showed that a decrease of nearly 7 % occurred after five consecutive cycles, suggesting its stability for practical applications.
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ENVIRONMENTAL POLLUTION
·
2023
·
IF 8.9
Muhammad Usman,Zhijian Shi,Yafan Cai,Shicheng Zhang,Gang Luo
Anaerobic digestion (AD) of wastewater is the most promising bioprocess for organic conversion, however, phenol is toxic and resistant to anaerobic degradation. The current study compared the effect of hydrochar and granular activated carbon (GAC) on AD of phenol at four concentrations (100 mg/L, 250 mg/L, 500 mg/L and 1000 mg/L). Results demonstrated that hydrochar significantly improved the methane production rate and reduced the lag phase at all concentrations of phenol. The methane production rate was improved by about 50% at both 100 mg/L and 250 mg/L phenol, while it was raised by >160% at 500 mg/L and 1000 mg/L phenol by hydrochar. The GAC only increased the methane production rate at 500 mg/L and 1000 mg/L due to high adsorption capacity. Further, the adsorption of phenol by hydrochar had no apparent impact on the methane production rate, even though certain amounts of phenol were adsorbed. At 500 mg/L, the amount of methane produced significantly increased, so 16S rRNA transcripts sequencing and metabolomic analysis were conducted. 16S rRNA transcripts sequencing analysis indicated that hydrochar resulted in the enrichment of syntrophic bacteria (e.g., Syntrophorhabdus & Syntrophobacter ) and Methanosaeta , which might be related with direct interspecies electron transfer . Further, it was noticed that the growth of Methanobacterium was repressed at 500 mg/L phenol, while hydrochar promoted its growth. Phenol was degraded into L-tyrosine and then followed the benzoate degradation pathway for methane production as revealed by metabolomic analysis. In addition, metabolomic analysis also revealed that hydrochar promoted the degradation of all metabolites and enhanced the phenol degradation into methane.
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Frontiers in Bioengineering and Biotechnology
·
2023
·
IF 5.7
Qu Xiaoying,Guo Xiaoli,Zhu Tingting,Zhang Zhe,Wang Wanchun,Hao Yuanping
Oral mucositis (OM) is the most common disease of the oral mucosa, which affects people’s daily production and life. Triamcinolone ointment is the common clinical drug for OM treatment. However, the hydrophobic properties of triamcinolone acetonide (TA) and the complex microenvironment of the oral cavity led to its low bioavailability and unstable therapeutic effects on ulcer wounds. Herein, dissolving microneedle patches (MNs) composed of mesoporous polydopamine nanoparticles (MPDA) loaded with TA (TA@MPDA), sodium hyaluronic acid (HA), and Bletilla striata polysaccharide (BSP) are prepared as the transmucosal delivery system. The prepared TA@MPDA-HA/BSP MNs exhibit well-arranged microarrays, high mechanical strength and fast solubility (<3 min) properties. In addition, the hybrid structure improves the biocompatibility of TA@MPDA and expedites oral ulcer healing in the SD rat model through the synergistic anti-inflammatory and pro-healing effects of microneedle ingredients (hormones, MPDA and Chinese herbs extracts), with 90% less amount of TA compared with Ning Zhi Zhu®. TA@MPDA-HA/BSP MNs are shown to be their great potential as novel ulcer dressings for OM management.
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