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HKUST-1 derived one-dimensional Cu/N-doped carbon nanofibers for simultaneous detection of acetaminophen and sulfanilamide

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Progress in Natural Science:Materials International 2023年第6期33卷 825-832页

作者： Saisai Chen Chaohai Wang Dayong Xu Jiansheng Li School of Chemical and Environmental Engineering Anhui Polytechnic University Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse School of Environmental and Biological Engineering Nanjing University of Science and Technology Henan Key Laboratory of Water Pollution Control and Rehabilitation Technology School of Municipal and Environmental Engineering Henan University of Urban Construction

The design of novel signal amplification elements was key to improving the sensing and analysis performance of electrochemical sensors. In this work, porous one-dimensional copper nitrogen-doped carbon nanofibers(CuNCNFs) were successfully prepared via the coupled process of electrospinning technology and high-temperature pyrolysis. This coupling of multiple processes and the introduction of heteroatoms pyrolyzed the HKUST-1 particles to generate three-dimensional Cu-doped carbon octahedra and mosaic them inside the one-dimensional carbon nitride channels, obtaining small-sized Cu particles while introducing a large number of N species, and constructing a three-dimensional MOFs-derived metal-carbon hybrid one-dimensional multistage carbon nitride structure. The resulting Cu-NCNFs sensor could simultaneously determine acetaminophen and sulfanilamide and exhibit superior electroanalytical performance, reproducibility, stability, and selectivity. This strategy provides a new approach to preparing novel signal amplification elements for the efficient monitoring of micropollutants.

关键词： HKUST-1 Cu/N-doped carbon nanofibers Acetaminophen Sulfanilamide

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Mitigating methane emissions during nitrogen removal in constructed wetlands

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Water Biology and Security 2025年

作者： Li, Ziqian Hu, Liping Zeng, Chenjun Ye, Liuling Yang, Huijian Kong, Lingwei Wei, Jun Shi, Wenqing Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technologies Jiangsu Key Laboratory of Atmospheric Environmental Monitoring & Pollution Control School of Environmental Science & Engineering Nanjing University of Information Science & Technology Nanjing 210044 China Guangdong Research Institute of Water Resources and Hydropower Guangzhou 510635 China Guangdong Huike Hydraulic Technology Corporation Limited Guangzhou 510635 China Key Laboratory of Coastal Environment and Resources of Zhejiang Province School of Engineering Westlake University Zhejiang Hangzhou 310030 China Power China Huadong Engineering Corporation Limited Hangzhou 311122 China

As nitrogen removal requires anaerobic conditions for denitrification, which facilitates the production of methane (CH4), a potent greenhouse gas, it is a challenge to achieve nitrogen removal with minimal CH4 emissio... 详细信息

As nitrogen removal requires anaerobic conditions for denitrification, which facilitates the production of methane (CH₄), a potent greenhouse gas, it is a challenge to achieve nitrogen removal with minimal CH₄ emissions in constructed wetlands (CWs). This study proposed a solution for mitigating CH₄ emissions while achieving nitrogen removal using porous fillers in CWs. We found that active denitrification occurred in the interior pores of these fillers in an oxygen-rich environment. The microbial analysis indicated that the internal pores of porous fillers created anaerobic habitats for denitrifiers as they had a higher nosZ/amoA ratio than on the surface. The anaerobic decomposition of organic matter was inhibited, yielding significantly lower CH₄/CO₂ ratios (<1.0 × 10⁻⁵) than those of traditional CWs (0.07). The methanogen proliferation and CH₄ production efficiency also remained at low levels (<1.1 × 10⁻³ and 0.045%, respectively), which was significantly lower than in traditional CWs (2.3 × 10⁶ and 38%, respectively). Overall, this study proposed a strategy for mitigating the greenhouse effect of carbon emissions from CWs in the future. © 2025 The Authors

关键词： Constructed wetland Denitrification Methane Nitrification Nitrogen removal

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The influences of pulse exposure versus continuous exposure to cadmium are different: Mechanisms elucidated from motor behavior and brain in amphibian larvae

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Ecotoxicology and environmental safety 2025年 299卷 118412页

作者： Minyi Huang Jiawei Yin Yuyue Wan Renyan Duan College of Agriculture and Biotechnology Hunan University of Humanities Science and Technology Loudi Hunan 417000 China Key Laboratory of Development Utilization Quality and Safety Control of Characteristic Agricultural Resources in Central Hunan Province Loudi Hunan 417000 China. Key Laboratory of Development Utilization Quality and Safety Control of Characteristic Agricultural Resources in Central Hunan Province Loudi Hunan 417000 China. Electronic address: duanrenyan78@***.

Cadmium (Cd) is a common environmental pollutant in aquatic ecosystems, often present in the form of pulses. However, the toxic effects of Cd on aquatic animals have been found to come primarily from continuous exposure, and there is little research on the effects of pulse exposure on animals. Here, the different effects of Cd exposure patterns on the motor behavior, brain histology and brain metabolism of Pelophylax nigromaculatus tadpoles (20 per parallel group) were explored. Our study showed that both continuous (CECd) and pulse exposure of Cd (PECd) led to a significant reduction in the moving distance (57.7 % vs 42.5 %), average speed (57.7 % vs 42.6 %) and moving frequency (45.3 % vs 7.9 %). Furthermore, both CECd and PECd led to the expansion and enlargement of the perivascular space of the cerebrum. Cd exposure increased the blood-brain barrier permeability, leading to brain cell swelling, and destroyed brain granular cells, Purkinje cells and brain gliacytes. Non-targeted metabolomics found a significant effect of Cd exposure on nucleic acid and amino acid metabolism. The most significant increases were observed in adenosine (99.4 %), threonine (47.9 %), citrulline (123.9 %), and erythrose 4p (184.1 %). It is noteworthy that the CECd exerted a more pronounced influence on brain structure, metabolism, and movement behaviour than the PECd. This phenomenon can be attributed to the fact that in PECd exposure, the individual's intermittent exposure to clean water partially offsets the effects of previous Cd exposure.

关键词： Behavior Brain injury Heavy metal Pulse exposure

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Exploring the environmental feasibility of montmorillonite integration in the electrochemical oxidation of acid mine drainage

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Separation and Purification technology 2025年 375卷

作者： Madinai Abulimiti Junxiao Luo Jinsong Liu Cheng Cheng Jingxia Guo Dongmei Zhou State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Nanjing 210023 Jiangsu Province China School of Ecology and Applied Meteorology Nanjing University of Information Science & Technology Nanjing 210044 Jiangsu Province China

With the escalating global demand for mineral resources, acid mine drainage (AMD) has emerged as a critical environmental concern due to its acidity and heavy metal contamination. To tackle this challenge, this study investigated the integration of montmorillonite (MMT) with electrochemical oxidation pretreatment for AMD, to enhance the removal efficiencies of iron and sulfate, thereby improving the effectiveness of subsequent limestone neutralization. Based on the results of this study, the optimal reaction parameters were determined to be a 5 V electrolysis voltageunder heating and static conditions. Incorporating MMT into the electrochemical system significantly enhanced Fe(II) oxidation and sulfate removal, resulting in total Fe and sulfate removal rates of 84.9% and 12.01%, respectively, which were attributed to MMT’s adsorption capacity, ion exchange properties, and co-precipitation mechanisms driven by Fe(III) hydroxide formation. Comprehensive characterization using scanning electron microscopy, X-ray diffractometry, Fourier-transform infrared spectroscopy and X-ray photoelectron spectroscopy analyses confirmed the presence of schwertmannite and FeO(OH) in the precipitates, highlighting the increased specific surface area, micropore volume, and structural integrity of MMT. Adsorption experiments demonstrated superior arsenic (As(III)) adsorption efficiencies in precipitates formed through electrochemical oxidation with MMT incorporation, supported by pseudo-second-order kinetic modeling, indicating that MMT had been modified through Fe(III) intercalation. Additionally, the integration of MMT reduced neutralizing agent consumption by up to 68.1%, contributing to a substantial decrease in overall treatment costs. In conclusion, the findings underscore the synergistic interplay between MMT and electrochemical oxidation, presenting a sustainable and economically viable solution for AMD remediation. This integrated approach not only enhances pollutant removal eff

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Effects of uranium(VI) stress on physiological feature and its accumulation of chinese cabbage

Effects of uranium(VI) stress on physiological feature and i...

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2nd International Conference on Material, Mechanical and Manufacturing Engineering, IC3ME 2014

作者： Xie, Lei Tang, Wen Ling Xie, Shui Bo Wang, Jing Song Liu, Ying Jiu Key Laboratory of Pollution Control and Resource Reuse of Hunan Province University of South China Hengyang Hunan 421001 China

ISBN: (纸本)9783038351740

The growth condition, malonaldehyde(MDA), accumulation of uranium, glutathione (GSH), non-protein sulfhydryl (-SH) and phytochelatins (PCs) in Chinese cabbage subjected to different uranium stresses were investigated. The results showed that Chinese cabbage was sensitive to high dose of uranium concentrations. From the perspective of the adsorption quantity of uranium, the adsorption capacity of uranium in roots was obviously better than in stem and leaf. under 20 mg/L uranium stress, the MDA content significantly increased by 125% than the control group. And the analysis of the non-enzymes indicated that the SH, GSH, PCs played an important role in the process of eliminating uranium poison with the increase of the SH, GSH, PCs under increasing uranium concentrations. © (2014) Trans Tech Publications, Switzerland.

关键词： Uranium compounds

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Synthesis and Application of a New Acrylic Ester Resin for Recycling SIPA from its Water Solution

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Chinese Chemical Letters 2005年第9期16卷 1209-1212页

作者： Wei Ben YANG Ai Min LI Ouan Xing ZHANG Hong Ming QIAN Jun FAN Li Cheng YANG State Key Laboratory of Pollution Control and Resources Reuse Nanjing University Nanjing 210093 Nanjing College of Chemical Technology Nanjing 210048 Jiangsu Engineering ＆ Technology Research Center for Organic Toxicant Control and Resource Reuse Nanjing 210038

A new acrylic ester polymer YWB-7 resin was prepared and characterized. The properties of YWB-7 resin were compared with those of the commercial Amberlite XAD-7, Diaion HP2MG and hypercrosslinked macroporous polymer NDA-150 resins. Both surface area and micropore area of YWB-7 resin were bigger than those of XAD-7 resin and HP2MG resin. The YWB-7 resin was successfully employed to recycle 5-sodiosulfoisophthalic acids （SIPA） from its solutions with and without methanol.

关键词： Acrylic ester resin 5-sodiosulfoisophthalic acids （SIPA） hydrogen bonding

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Magnetic field effects on synthesis of porous silica gel and the adsorption property of Pb2+ ions

Magnetic field effects on synthesis of porous silica gel and...

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4th International Conference on Advanced Engineering Materials and technology, AEMT 2014

作者： Xiong, Zheng Wei Lu, Sen Wang, Jing Song Sun, Ping Key Laboratory of Pollution Control and Resource Reuse of Hunan Province University of South China Hengyang Hunan 421001 China School of the Environment State Key Laboratory of Pollution Control and Resource Reuse Nanjing University Nanjing 210093 China

ISBN: (纸本)9783038352068

Under the effect of an adjustable magnetic field (0-0.6T), porous silica gel was synthesized via sol-gel process by phase-separation method to investigate the effect of magnetic field on the formation time of porous silica gel and the influence of porous silica gel synthesized under the induction of magnetic field (m- SiO2) on Pb2+ adsorption property. The findings of this study show that the reaction rate can be increased and the gelation time shortened under the effect of magnetic field. Within the range of intensity of the magnetic field in this study, the 0.25T magnetic field affects the porous silica gel most significantly and can reduce the gelation time from 120min to 90min;the Pb2+ adsorption property of m- SiO2 is better than that of ordinary silica gel(SiO2);under the condition that the solid-to-liquid ratio and the pH value change, the Pb2+ equilibrium adsorption rate and equilibrium absorption capacity of silica gel synthesized with the 0.25T magnetic field, compared with ordinary silica gel(SiO2), can averagely increase by 11.32% and 11.20mg/g, respectively. © (2014) Trans Tech Publications, Switzerland.

关键词： Phase separation

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Denitrifying phosphorous removal in anaerobic/anoxic SBR system with different startup operation mode

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Journal of Harbin Institute of technology(New Series) 2010年第6期17卷 824-829页

作者：姜欣欣杨基先马放杨菲菲魏利尹军 State Key Laboratory of Urban Water Resource and Environment Harbin Institute of Technology Dept.of Environmental Science Liaoning University Jilin Province Key Laboratory of Water Pollution Control and Resources Reuse Jilin Architectural and Civil Engineering Institute

To achieve stable and efficient nitrogen and phosphorus removal and to investigate the characteristics of the A/A SBR enriched with denitrifying phosphorus removal bacteria(DPB),the whole course of startup was studied with two reactors operated in different *** reactor I was operated under anaerobic/settling/anoxic/settling mode,and the reactor II was operated under anaerobic/anoxic/settling *** between the two reactors in removal efficiency of COD,nitrogen and phosphorus were *** results indicated that efficient performance could be achieved in both reactors with different startup operation mode,while the phosphorus removal efficiency was improved sooner in reactor I than in reactor II,which suggested that reactor I would supply a more favorable condition for DPB ***,it was observed that the amount of organic substrates consumption had a linear correlation to that of phosphorus release in anaerobic phase when DPB was accumulated in the A/A SBR denitrifying phosphorus removal system.

关键词： enhanced biological phosphorous removal anaerobic/anoxic SBR denitrifying phosphorous removing bacteria startup operation

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Reductive transformation and detoxification mechanism of 2,4-dinitrochlorobenzene in combined zero valent iron and anaerobic-aerobic process

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Journal of Environmental Sciences 2012年第11期24卷 1900-1907页

作者： Jinyou Shen Zongyuan Zhou Changjin OU Xiuyun Sun Jiansheng Li Weiqing Han Lin Zhou Lianjun Wang Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse School of Environmental and Biological EngineeringNanjing University of Science and TechnologyNanjing 210094China School of Mechatronical Engineering Beijing Institute of TechnologyBeijing 100081China

A combined zero valent iron （ZVI） and anaerobic-aerobic process was adopted for the treatment of 2,4-dinitrochlorobenzene （DNCB）- containing wastewater. The transformation pathway, reduction of acute toxicity and enhancement of biodegradability were investigated, After pretreatment by ZVI, DNCB in wastewater could be completely converted into 2,4-diaminochlorobenzene （DACB）. The ratio of BODs/COD increased from 0.005±0.001 to 0.168±0.007, while EC50,48hr （V/V） increased from 0.65% to 5.20%, indicating the enhancement of biodegradability and reduction of acute toxicity with the pretreatment by ZVI. DACB was further dechlorinated to m-phenylenediamine during the anaerobic process using methanol as electron donor, with EC50＇ 48 hr increasing from 5.20% to 48.2%. After the subsequent anaerobic-aerobic process, m-phenylenediamine was degraded completely, with effluent COD of 67.5±10.8 mg/L. This effluent of the subsequent anaerobic-aerobic process was not toxic to zebrafish. The combined ZVI and anaerobic-aerobic process offers bright prospects for the treatment of chlorinated nitroaromatic compound-containing wastewater.

关键词： 2,4-dinitrochlorobenzene zero-valent iron toxicity biodegradability

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Uranium (VI) bioremediation by Acinetobacter sp. USCB2 isolated from uranium tailings area 2

Uranium (VI) bioremediation by Acinetobacter sp. USCB2 isola...

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2018 2nd International Symposium on Resource Exploration and Environmental Science, REES 2018

作者： Li, Licheng Zeng, Taotao Xie, Shuibo School of Civil Engineering University of South China Hengyang China Hunan Province Key Laboratory of Pollution Control and Resources Reuse Technology University of South China Hengyang China

Bioremediation of uranium (VI)-contaminated aquifers was investigated by using bacteria isolated from a uranium tailing in South China. The bacteria were identified as Acinetobacter on the basis of physiological, biochemical tests and 16S rDNA sequence homology analysis. The protein concentration in the supernatant declined from 50.26 μ g/mL to 40.01 μ g/mL after uranium removal, and the activity of bacterial phosphatase increased from 36.04 U/L to 39.81 U/L. The FTIR, SEM-EDS and XRD demonstrated the involvement of functional groups in U (VI) binding, U accumulated on the surface of the bacteria and the precipitated is Uranyl Sulfite Hydrate. The results from this study demonstrate the potential of the U tolerant, bacterium Acinetobacter sp. USC B2 isolate might be considered as promising candidates in the design of uranium bioremediation strategies. © 2018 Institute of Physics Publishing. All rights reserved.

关键词： Bacteria

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