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Fabrication of Ce-doped macroporous carbon fibers for efficient degradation of tetracycline by activating persulfate

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Journal of Rare Earths 2025年第3期43卷 480-489,I0003页

作者： Chaohai Wang Taiyang Cao Zheng Lv Rongfu Peng Yanli Mao Jinhui zhang Xinfeng Zhu Junning Wang Ke Zhao Gangfu Song Henan Key Laboratory of Water Pollution Control and Rehabilitation Technology School of Municipal and Environmental EngineeringHenan University of Urban ConstructionPingdingshan467036China School of Environmental and Municipal Engineering North China University of Water Resources and Electric PowerZhengzhou40000China School of Light Industry&Chemical Engineering Dalian Polytechnic UniversityDalian116034China Henan Provincial Development and Reform Commission Zhengzhou450016China

Metal-organic frameworks(MOFs)and their derivatives have gained significant attention in recent years for their ability to catalyze the advanced oxidation of ***-doped MOFs,in particular,have shown promise due to their high catalytic efficiency,practical applicability,and ***,their structure,catalytic properties,and mechanisms are not yet fully ***-8 was chosen as the raw material to prepare cerium-doped hollow carbon nano fibers(Ce-HCNFs)using the electrostatic spinning-calcination *** objective is to investigate the structure,catalytic performance,and catalytic mechanism of *** results show that Ce-HCNFs catalyzed the degradation of tetracycline(TC)by persulfate up to 76.9%,Quenching experiments and electron paramagnetic resonance experiments indicate the dominant role of single-linear ***,the experiments on the influence factor and cycling demonstrate the exceptional stability and recycling capability of Ce-HCNFs in real-world water environments.

关键词： Cerium Metal-organic frameworks Electrospinning Tetracycline Persulfate Rare earths

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Optimized the vanadium electrolyte with sulfate-phosphoric mixed acids to enhance the stable operation at high-temperature

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Frontiers of Chemical Science and Engineering 2024年第2期18卷 13-26页

作者： Ling Ge Tao Liu Yimin Zhang Hong Liu School of Resource and Environmental Engineering Wuhan University of Science and TechnologyWuhan 430081China State Environmental Protection Key Laboratory of Mineral Metallurgical Resources Utilization and Pollution Control Wuhan University of Science and TechnologyWuhan 430081China Hubei Collaborative Innovation Center for High Efficient Utilization of Vanadium Resources Wuhan University of Science and TechnologyWuhan 430081China Hubei Provincial Engineering Technology Research Center of High Efficient Cleaning Utilization for Shale Vanadium Resource Wuhan University of Science and TechnologyWuhan 430081China School of Resource and Environmental Engineering Wuhan University of TechnologyWuhan 430070China

Herein, the influence of the concentration design and comprehensive performance of the sulfate-phosphoric mixed acid system electrolyte is investigated to realize an electrolyte that maintains high energy density and stable operation at high temperatures. Static stability tests have shown that VOPO4 precipitation occurs only with vanadium(V) electrolyte. The concentration of vanadium ion of 2.0–2.2 mol·L^(–1), phosphoric acid of 0.10–0.15 mol·L^(–1), and sulfuric acid of 2.5–3.0 mol·L^(–1) are suitable for a vanadium redox flow battery in the temperature range from –20 to 50 ℃. The equations for predicting the viscosity and conductivity of electrolytes are obtained by the response surface method. The optimized electrolyte overcomes precipitation generation. It has 2.8 times higher energy density than the non-phosphate electrolyte, and a coulomb efficiency of 94.0% at 50 ℃. The sulfate-phosphoric mixed acid system electrolyte promotes the electrode reaction process, increases the current density, and reduces the resistance. This work systematically optimizes the concentrations of composition of positive and negative vanadium electrolytes with mixed sulfate-phosphoric acid. It provides a basis for the different valence states and comprehensive properties of sulfate-phosphoric mixed acid system vanadium electrolytes under extreme environments, guiding engineering applications.

关键词： all vanadium redox flow battery mixed-acid vanadium electrolyte concentration optimization response surface methodology high-temperature stability

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Design of copper oxide and oxygen codoped graphitic carbon nitride activator for efficient radical and nonradical activation of peroxymonosulfate

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Chinese Chemical Letters 2023年第6期34卷 184-190页

作者： Lin Wei Jialing Li Chengyun Zhou Biao Song Fanzhi Qin Wenjun Wang Hanzhuo Luo Deyu Qin Cheng Huang Chen Zhang Yang Yang College of Environmental Science and Engineering Hunan University and Key Laboratory of Environmental Biology and Pollution ControlMinistry of Education(Hunan University)Changsha 410082China School of Design Hunan UniversityChangsha 410082China School of Resources and Environment Hunan University of Technology and BusinessChangsha 410205China Department of Chemical and Materials Engineering University of AlbertaEdmontonAlberta T6G 1H9Canada

Rational regulation of stable graphitic carbon nitride(CN)for superior peroxymonosulfate(PMS)activation is important in the catalytic degradation of water *** this work,the copper oxide and oxygen co-doped graphitic carbon nitride(Cu O/O-CN)was prepared via one-step synthesis and applied in activating PMS for oxytetracycline(OTC)degradation,displaying superior catalytic *** characterization and theoretical calculations indicated that the synergistic effect between the oxygen site of CN and CuO can modulate the electronic structure of the whole composite further facilitating the formation of non-radical^(1)O_(2)and various reactive *** of the influencing factor experiments revealed that CuO/O-CN has a strong resistance to the environmental *** degradation efficiency of OTC in the real water environment even exceeded that in the deionized *** four successive runs of the optimal catalyst,the OTC removal rate was still as high as 91.3%.This work developed a high-efficiency PMS activator to remove refractory pollutants via both radical pathway and non-radical pathway,which showed a promising potential in the treatment of wastewaters.

关键词： Graphitic carbon nitride Codoping Peroxymonosulfate Antibiotics Advanced oxidation process

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A novel biochar-based 3D composite for ultrafast and selective Cr(VI)removal in electroplating wastewater

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Biochar 2024年第1期6卷 818-834页

作者： Zongzheng Yang Jinjin Wang Nan Zhao Runyi Pang Chuanfang Zhao Ying Deng Di Yang Haochen Jiang Zhiguo Wu Rongliang Qiu College of Oceanography and Environment Tianjin University of Science and TechnologyTianjin 300457China. College of Chemical Engineering and Materials Tianjin University of Science and TechnologyTianjin 300457China. National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China Guangdong Key Laboratory of Integrated Agro-Environmental Pollution Control and ManagementInstitute of Eco-Environmental and Soil SciencesGuangdong Academy of SciencesGuangzhou 510650China. Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology School of Environmental Science and EngineeringSun Yat-Sen UniversityGuangzhou 510275China. Guangdong Laboratory for Lingnan Modern Agriculture College of Natural Resources and EnvironmentSouth China Agricultural UniversityGuangzhou 510642China. Research Center for Eco-Environmental Sciences Chinese Academy of SciencesBeijing 100085China.

In this study,a newly developed composite of biochar-poly(m-phenylenediamine)(BC-PmPD)exhibiting a distinct skeletal structure was synthesized for the purpose of extracting Cr(VI)from aqueous *** was employed as a supportive carrier onto which PmPD nanoparticles were uniformly affixed through in-situ polymerization and oxidation synthesis,both within and outside the layered configuration of *** structural stability and morphologies of BC-PmPD were assessed utilizing Fourier transform infrared(FTIR)spectroscopy,scanning electron microscopy,thermogravimetric analysis,analysis of specific surface area and pore size,X-ray photoelectron spectroscopy(XPS),and X-ray *** comparison to other modified BCs reported,BC-PmPD exhibited the highest Cr(VI)removal ***,at 303 K,BC-PmPD achieved a maximum Cr(VI)removal capacity of 775 mg g−1,surpassing the capabilities of unmodified BC and PmPD by 10.4 and 2.13 times,*** involving XPS,FTIR,and density functional theory calculation confirmed that proton transfer happened between protonated amine(−NH2)functional group within the structure of BC-PmPD and HCrO4−before the formation of hydrogen ***,environmentally persistent free radicals facilitated the reduction of the adsorbed Cr(VI).Quantification of the functional groups indicated that the amino group was responsible for 93.0%of the Cr(VI)adsorption in ***-PmPD dis-played potent adsorption and reduction capabilities,alongside notable stability,repeatability,and promising potential for application in the remediation for high concentrations of Cr(VI)in electroplating wastewater scenarios.

关键词： BC-poly(m-phenylenediamine)composite Selective removal of Cr(VI) Electroplating wastewater Proton transfer H bond

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Toxic effects of combined exposure to dysprosium（Dy）and ammonia nitrogen on Daphnia magna

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Huanjing Kexue Xuebao / Acta Scientiae Circumstantiae 2025年第4期45卷 505-517页

作者： Ye, Li Zhang, Pengze Yao, Junqiang Chen, Wenqing Wang, Zaosheng Jiangxi Provincial Key Laboratory of Environmental Pollution Prevention and Control in Mining and Metallurgy Ganzhou 341000 China School of Resources and Environmental Engineering Jiangxi University of Science and Technology Ganzhou 341000 China

The extensive application of rare earth elements（REEs），particularly dysprosium（Dy），across various industries has resulted in large amounts of mineral extraction，consequently leading to the release of Dy and ammonia nitrogen （NH₄⁺-N） into the environment. As emerging contaminants，the toxicological effects and potential ecotoxicological risks of Dy，combined with NH₄⁺-N，are increasingly growing concerns in aquatic ecosystems. To address these issues，acute and chronic experiments using Daphnia magna were conducted，and biochemical biomarkers were further assayed to explore relevant mechanism of toxic effects and then assess the overall toxicity through integrated biomarker response（IBR）. The results showed that the 48h-LC₅₀ of Dy and NH₄⁺-N to D. magna was 1.71 and 57.59 mg·L^-1，respectively，which further inferred that the safe concentration of NH₄⁺-N was 2.89 mg·L^-1. Under acute co-exposure，Dy progressively exhibited increasing synergistic toxicity to D. magna with the elevated concentrations of NH₄⁺-N. In chronic mono-exposure of Dy，concentration-dependent effects to D. magna were generally observed with promotion and suppression at low and high concentrations，respectively. While under co-exposure with 2.89 mg·L^-1 of NH₄⁺-N，it promoted reproduction but remarkably inhibited the growth and survival of D. magna. With the increasing concentrations of Dy，oxidative stress regarding the activities of total superoxide dismutase（T-SOD）and catalase（CAT）initially increased and then declined，while glutathione（GSH）levels showcased the opposite pattern. Meanwhile，both the content of malondialdehyde（MDA）and the activity of acetylcholinesterase（AChE）as neuromodulatory substances increased with the elevated concentrations of Dy. In short，biomarker profiles revealed the complex consequences in terms of growth and r

关键词： ammonia nitrogen combined toxic effect Daphnia magna dysprosium neurotoxicity oxidative stress

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Thermal stability of soil organic carbon subjected to water erosion as a function of edaphic factors

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International Journal of Sediment Research 2022年第1期37卷 26-36页

作者： Zhongwu Li Linhui Xiao Chuxiong Deng Zaijian Yuan Chen Liang Qian Xiong Zeting Li Xiaodong Nie College of Resources and Environmental Science Hunan Normal University Guangdong Engineering Center of Non-point Source Pollution Control Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management Guangdong Institute of Eco-environmental Science & Technology Guangdong Academy of Sciences National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China

The stability of soil organic carbon （SOC）,as it relates to resistance to decomposition,is important for greenhouse gas emission and climate ***,the SOC stabilization and its related influencing factors subjected to water erosion remain *** objective of the current study was to determine the SOC stability under long-term water erosion and to investigate the link between SOC stability and edaphic *** samples from eroded,depositional,and control sites in a closed watershed in subtropical China were *** SOC concentration,carbon functional groups,soil physicochemical properties,and thermal stability of SOC were *** study results showed that the primary component of the SOC functional groups was O-alkyl carbon （reached 40%）,and its proportion has no significant difference among different *** TG-T50（the temperature at which 50%of the soil organic matter is lost） values indicated that the SOC thermal stability in the eroded topsoil was higher than that of the deposited *** carbon functional groups were lack of relation with SOC thermal stability（p>0.05）.However,the TG-T50was significantly positively correlated with the cation exchange capacity and silt,but remarkably negatively correlated with SOC,dissolved organic carbon,total nitrogen,sand,clay,p H,aluminum,specific surface area,and iron *** results indicated that the edaphic factors,which were strongly affected by micro-environment,are the main factors affecting thermal stability of organic *** SOC stabilization under the effects of long-term water erosion should be addressed from the perspective of the ecosystem.

关键词： Soil erosion Soil organic matter Thermogravimetry Preservation Stability

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Vanadium(Ⅳ)solvent extraction enhancement in high acidity using di-(2-ethylhexyl)phosphoric acid with[Cl^(-)]present:an experimental and theoretical study

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Frontiers of Chemical Science and Engineering 2023年第1期17卷 56-67页

作者： Hong Liu Yi-Min Zhang Jing Huang Tao Liu School of Resource and Environmental Engineering Wuhan University of Science and TechnologyWuhan 430081China State Environmental Protection Key Laboratory of Mineral Metallurgical Resources Utilization and Pollution Control Wuhan University of Science and TechnologyWuhan 430081China Hubei Collaborative Innovation Center for High Efficient Utilization of Vanadium Resources Wuhan University of Science and TechnologyWuhan 430081China Hubei Provincial Engineering Technology Research Center of High Efficient Cleaning Utilization for Shale Vanadium Resource Wuhan University of Science and TechnologyWuhan 430081China

Separation of vanadium from black shale leaching solution at low pH is very meaningful,which can effectively avoid the generation of alkali neutralization slag and the resulting vanadium *** this study,coordination mechanism of vanadium in acid leaching solution at low pH was investigated with the intervention of chloride *** the conditions of pH 0.8,di-(2-ethylhexyl)phosphoric acid concentration of 20%,phase ratio of 1:2,and extraction time of 8 min,the vanadium extraction could reach 80.00%.The Fourier transform infrared and electrospray ionization results reveal that,despite the fact that the chloride ion in the leachate could significantly promote vanadium extraction,the chloride ion does not enter the organic phase,indicating an intriguing *** Cl^(-)-V,SO_(4)^(2-)-V,and H_(2)O-V,the V-Cl bond is longer and the potential difference between coordinate ions and vanadium is ***,Vo^(2+)gets easily desorbed with chloride ions and enter the organic *** the same time,the hydrogen ions of di-(2-ethylhexyl)phosphoric acid also enter the water phase more easily,which reduces the pH required for the extraction reaction.

关键词： vanadium black shale solvent extraction high acidity extraction

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Macleaya cordata extract exhibits some potential as a surrogate antibiotic by improving gastrointestinal epithelial status and humoral response in goats

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Animal Nutrition 2024年第3期18卷 356-366页

作者： Qiongxian Yan Xilin Li Xiaoling Zhou Wenxun Chen Xingzhou Tian Suntorn Wittayakun Pramote Paengkoum Zhiliang Tan Chinese Academy of Sciences Key Laboratory of Agro-Ecological Processes in Subtropical Region National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry ProductionHunan Provincial Key Laboratory of Animal Nutrition&Physiology and MetabolismInstitute of Subtropical AgricultureThe Chinese Academy of SciencesChangsha 410125China College of Animal Science Tarim UniversityAlaer 843300China Key Laboratory of Animal Genetics Breeding and Reproduction in the Plateau Mountainous RegionMinistry of EducationCollege of Animal ScienceGuizhou UniversityGuiyang 550025China Faculty of Science and Agricultural Technology Rajamangala University of Technology LannaLampang 52000Thailand School of Animal Technology and Innovation Institute of Agricultural TechnologySuranaree University of TechnologyNakhon Ratchasima 30000Thailand

Macleaya cordata extract(MCE)is a potential replacement for *** the current study,effects of MCE on the gastrointestinal health and humoral responses of host animals were explored.A total of 30 weanling goats with similar body weight of 9.15±1.36 kg were randomly allocated into three groups(n=10 per group):control group(CON group,fed with a basal diet),antibiotic group(Abx group,fed with the basal diet supplemented with 0.18 g/d vancomycin and 0.36 g/d neomycin),and MCE group(fed with the basal diet supplemented with 5 g/d MCE),for three *** showed that antibiotic addition decreased the height and area of rumen papillae,ruminal mucosa Toll-like receptor 8(TLR8),interleukin-8(IL-8)and interleukin-1β(IL-1β)gene relative expression levels and microbial diversity,altered the volatile fatty acid(VFA)profile in the rumen,and increased monocytes amount and CD4^(+)T cells percentage in the peripheral blood(P<0.05)compared to CON *** addition increased the average daily gain,ileal villus height,villus height/crypt depth,and immunoglobulin M(IgM)content in the peripheral blood(P<0.05)compared to the ***,MCE addition decreased the proportion of isobutyric acid in the chyme of the ileum(P=0.005)compared to the CON *** results suggest that antibiotic supplementation may suppress the epithelial state and microbial diversity and fermentation in goats,but stimulate cellular response to maintain the growth performance of *** administration improved the epithelial state and humoral response to promote the growth performance in goats.

关键词： Macleaya cordata extract Substitution of antibiotics Humoral immunity Gastrointestinal health Bacterial community Branch-chain fatty acid

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Constructing a Raman and surface-enhanced Raman scattering spectral reference library for fine-particle analysis

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Journal of Environmental Sciences 2022年第8期34卷 1-13页

作者： Hui Chen Fengkui Duan Kebin He Jingjing Du Zhenli Sun Suhua Wang Key Laboratory of Resources and Environmental System Optimization of Ministry of Education College of Environmental Science and EngineeringNorth China Electric Power UniversityBeijing 102206China State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China State Key Laboratory of Environmental Chemistry and Ecotoxicology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China Guangdong Provincial Key Laboratory of Petrochemcial Pollution Processes and Control School of Environmental Science and EngineeringGuangdong University of Petrochemical TechnologyMaoming 525000 China

Fine particles associated with haze pollution threaten the health of over 400 million people in China. Owing to excellent non-destructive fingerprint recognition characteristics, Raman and surface-enhanced Raman scattering(SERS) are often used to analyze the composition of fine particles to determine their physical and chemical properties as well as reaction mechanisms. However, there is no comprehensive Raman spectral library of fine particles. Furthermore, various studies that used SERS for fine-particle composition analysis showed that the uniqueness of the SERS substrates and different excitation wavelengths can produce a different spectrum for the same fine-particle component. To overcome this limitation, we conducted SERS experiments with a portable Raman spectrometer using two common SERS substrates(silver(Ag) foil and gold nanoparticles(Au NPs)) and a 785 nm laser. Herein, we introduced three main particle component types(sulfate-nitrate-ammonium(SNA), organic material, and soot) with a total of 39 chemical substances. We scanned the solid Raman, liquid Raman, and SERS spectra of these substances and constructed a fine-particle reference library containing 105 spectra. Spectral results indicated that for soot and SNA, the differences in characteristic peaks mainly originated from the solid-liquid phase transition;Ag foil had little effect on this difference, while the Au NPs caused a significant red shift in the peak positions of polycyclic aromatic hydrocarbons. Moreover, with various characteristic peak positions in the three types of spectra, we could quickly and correctly distinguish substances. We hope that this spectral library will aid in the future identification of fine particles.

关键词： Raman Surface-enhanced Raman scattering(SERS) Spectral library Fine-particle

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Experimental and theoretical insights into copper phthalocyanine-based covalent organic frameworks for highly efficien radioactive iodine capture

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Chinese Chemical Letters 2022年第7期33卷 3549-3555页

作者： Xuewei Liu Anrui Zhang Ran Ma Bo Wu Tao Wen Yuejie Ai Mingtai Sun Jie Jin Suhua Wang Xiangke Wang MOE Key Laboratory of Resources and Environmental Systems Optimization College of Environment and Chemical EngineeringNorth China Electric Power UniversityBeijing 102206China Guangdong Provincial Key Laboratory of Petrochemical Pollution Process and Control School of Environmental Science and EngineeringGuangdong University of Petrochemical TechnologyMaoming 525000China

Exploring efficient materials for capturing radioactive iodine in nuclear waste is of great significance for the progress of nuclear energy as well as the protection of ecological *** organic frameworks(COFs)have emerged as promising adsorbents because of their predesignable and functionalizable skeleton ***,it remains a grand challenge to achieve large scale preparation of *** this work,we developed a mild and efficient microwave irradiation method instead of the traditional solvothermal method to prepare copper phthalocyanine-based covalent organic frameworks(Cu_(x)Pc-COFs)within only 15 *** nitrogen-rich 1,2,4,5-tetracarbonitrilebenzene(TCNB)was selected as the solely organic ligand to construct copper phthalocyanine-based 2D conjugated *** resultant Cu_(x)Pc-COFs exhibited excellent iodine enrichment with 2.99 g/g for volatile iodine and 492.27 mg/g for iodine-cyclohexane solution,respectively,outperforming that of many porous *** indicated by spectroscopic analysis and DFT calculations,this impressive adsorption performance can be attributed to the charge transfer arising from nitrogen-rich phthalocyanine structures and electron-richπ-conjugated systems with iodine ***,the strong electrostatic interaction between Cu(Ⅱ)on chelate centers and polyiodide anions(I_(x)^(-))also play an important role in the firmly trapping radioactive ***,this study provides a facile and intelligent approach to implement metal-based COFs for the remediation of toxic radioactive iodine.

关键词： Cu_(x)Pc-COFs Microwave Iodine adsorption Charge transfer Electrostatic interaction

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