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Visual Glucose Sensing Via Dispersive Liquid-Liquid Microextraction and Anion Exchange of Cspbbr3 Perovskite Nanocrystals

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SSRN 2025年

作者： Hong, Wenping Li, Yishan Luo, Jiamin Zhao, Shanshan Shun, Libo Li, Feiming Cai, Zhixiong Lin, Jinming Zhang, Maosheng College of Chemistry Chemical Engineering and Environment Minnan Normal University Zhangzhou363000 China Fujian Province Key Laboratory of Modern Analytical Science and Separation Technology Minnan Normal University Zhangzhou363000 China Fujian Provincial University Key Laboratory of Pollution Monitoring and Control Minnan Normal University Zhangzhou36300 China Department of Chemistry Tsinghua University Beijing100084 China The Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology China

A convenient, rapid, and reliable glucose sensor is especially essential in the food and beverage fields because excessive glucose intake can increase the risk of cardiovascular disease, diabetes, and hypertension. Here, a sensitive visual sensing and detection method for glucose has been successfully designed and constructed based on the dispersive liquid-phase microextraction (DLLME) technique combined with anion exchange in CsPbBr3 perovskite nanocrystals (PNCs). Benefiting not only from the enrichment effect of microextraction techniques but also from the sensitive and rapid anion-exchange capabilities of PNCs, this method displayed high sensitivity and a low detection limit of 3.25 μg/mL. To further demonstrate the feasibility, this approach was used for the determination of glucose in real samples, such as sugar-free beverages, and showed good selectivity and recoverability, ranging from 95.6% to 107.6%. Additionally, a test paper-based detection method was established, utilizing significant fluorescence color changes for sensitive, portable, and semi-quantitative detect glucose in the field. © 2025, The Authors. All rights reserved.

关键词： Perovskite

Deciphering the interaction of sulfamethoxazole with biodegradable versus conventional, virgin versus aged microplastics in aquatic environment

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Journal of environmental Sciences (China) 2025年 157卷 729-741页

作者： Luo, Chenghui Shao, Xiuyun Shen, Jiachao Pei, Junjun Wei, Yuanfeng Yin, Kai Luo, Shenglian State Key Laboratory of Chemo/Biosensing and Chemometrics Hunan University Changsha410082 China Ministry of Forestry Bioethanol Research Center Central South University of Forestry and Technology Changsha410004 China College of Environmental and Engineering Hunan University Changsha410082 China College of Environment and Chemical Engineering Nanchang Hangkong University Nanchang330063 China Power China Beijing Engineering Corporation Limited Beijing 100024 China

Co-exposure of pharmaceuticals and microplastics (MPs) significantly exacerbates the aquatic environmental pollution issue. While MPs are identified as carriers of pollutants, research on the adsorption behaviors of biodegradable and conventional MPs to pharmaceuticals limited. The study investigated the adsorption behavior of conventional MPs (polystyrene and polyethylene terephthalate), biodegradable MPs (polylactic acid (PLA) and polybutylene succinate (PBS) for sulfamethoxazole (SMX). Meanwhile, changes in physical-chemical properties, including morphology, crystallinity, hydrophobicity and structures of MPs after aging (e.g., ultraviolet treatment) were investigated. Results exhibited that the oxygen-containing functional groups of MPs surface increased after ultraviolet treatment and enhanced the adsorption capacity for SMX, except for PLA. PLA exhibits the highest adsorption capacity, primarily due to its higher hydrophobicity and larger pore size. In contrast, PBS shows the lowest adsorption affinity for SMX because of its hydrophilicity and small pore size. The adsorption capacity of degradable MPs after aging is greater than that of non-degradable MPs. Electrostatic interaction and hydrophobic interaction are the main mechanisms of adsorption of virgin MPs, while hydrogen bond interaction and electrostatic interaction are the primary adsorption mechanisms for aged MPs. These results contribute to understanding the co-transport and migration of SMX and MPs in the environment, and furnish the necessary data for their ecological risk assessment. © 2025

关键词： Aging of materials

Study on Concentration Distribution and Detonation Characteristics for Non-Axisymmetric Fuel Dispersal

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SSRN 2022年

作者： Zeng, Linghui Wang, Zhongqi Chen, Xing Li, Jianping State Key Laboratory of Explosion Science and Technology Beijing Institute of Technology Beijing100081 China College of Environment and Chemical Engineering Sichuan University of Science & Engineering Zigong643000 China

To study the concentration distribution and detonation characteristics for non-axisymmetric fuel, a dynamic model of the whole process for fuel dispersal and detonation is built. The concentration and detonation fields of 85 kg cylindrical and fan-shaped fuel are investigated by experiments and numerical simulations. The phase distribution and component changes of fuel cloud at different locations are compared. The results show that the maximum cloud radius is 20.94 m in 135°and the minimum is 12.04 m in 0°. The diameter of the detonation fireball is 53.6 m, and the peak temperature is between 3270-3455 K. At 8 m, the highest peak overpressure is 3.44 MPa in 0°and the lowest is 2.97 MPa in 135°. The proportion of liquid phase in 0° is 22.90%, and the fuel loss is 11.8% and 9% higher than that in 135° and cylindrical charge, respectively. The stable propagation distance of detonation wave in 135° is 42.50% and 28.37% longer than that in 0° and cylindrical charge, respectively. This study provides reference for charge design, concentration prediction, detonation power optimization and safety protection of fire and explosion accidents in different engineering backgrounds. © 2022, The Authors. All rights reserved.

关键词： Fuels

Spatiotemporal variation, fluxes and risk evaluation of neonicotinoid insecticides within the midsection of Yangtze River, China: An exploration as ecological protection threshold

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Chemosphere 2024年 357卷 141983页

作者： Gao, Shang Dong, Tao Chen, Yulin Ma, Yongfei Cui, Song Zhang, Zulin Hubei Key Laboratory of Mineral Resources Processing and Environment School of Resources and Environmental Engineering Wuhan University of Technology Wuhan430070 China School of Water Conservancy and Civil Engineering Northeast Agricultural University Harbin150030 China The James Hutton Institute AberdeenAB15 8QH United Kingdom

Neonicotinoid insecticides (NNIs) have attracted global concern due to its extensive use in agricultural activities and their potential risks to the animal and human health, however, there is limited knowledge on the regional traits and ecological risks of NNIs in the aquatic environments. We herein investigated the occurrence of NNIs within the midsection of Yangtze River in China, offering the inaugural comprehensive report on NNIs within this region. In this study, eleven NNIs were analyzed in 108 river water and sediment samples from three seasons (normal, dry and wet season). We detected a minimum of seven NNIs in the water and four NNIs in the sediment, with total concentrations ranging from 12.33 to 100.5 ng/L in water and 0.08–5.68 ng/g in sediment. The levels of NNIs in both river water and sediment were primarily influenced by the extent of agricultural activities. The estimated annual load of NNIs within the midsection of Yangtze River totaled 40.27 tons, April was a critical contamination period. Relative potency factor (RPF) analysis of the human exposure risk revealed that infants faced the greatest exposure risk, with an estimated daily intake of 11.27 ng kg−1∙bw∙d−1. We established the acute and chronic thresholds for aquatic organisms by employing the Species Sensitive Distribution (SSD) method (acute: 384.1 ng/L;chronic: 168.9 ng/L). Based on the findings from this study, 33% of the river water samples exceeded the chronic ecological risks thresholds, indicating the urgent need for intervention programs to guarantee the safety of the river for aquatic life in the Yangtze River Basin. © 2024 Elsevier Ltd

关键词： Aquatic organisms

VS-Net: A Voxel Encoding and Sparse Convolution Embedded Network for LiDAR 3D Object Detection

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VS-Net: A Voxel Encoding and Sparse Convolution Embedded Net...

2022 IEEE International Conference on Robotics and Biomimetics, ROBIO 2022

作者： Liu, Meng Niu, Jianwei Liu, Yu The China North Artificial Intelligence and Innovation Research Institute Beijing100072 China The China North Vehicle Research Institute Beijing100072 China The State Key Laboratory of Software Development Environment School of Computer Science and Engineering Beihang University Beijing100191 China The State Key Laboratory of Virtual Reality Technology and Systems School of Computer Science and Engineering Beihang University Beijing100191 China The Hangzhou Innovation Institute Beihang University Hangzhou310051 China The Zhengzhou University Research Institute of Industrial Technology School of Information Engineering Zhengzhou University Zhengzhou450001 China

ISBN: (纸本)9781665481090

Accurate and efficient 3D object detection in LiDAR point cloud is critical for autonomous driving. In this paper, we provide a solution for LiDAR-only detection which employs voxel features and a sparse convolution network. Specifically, we utilized voxel centers to encode point clouds' voxel features. Then, combining the sparse convolution method, we leveraged residual learning to design the backbone network. The detector output predicted results for multi-category and multi-object detection. Our method was evaluated on three popular and challenging datasets (KITTI, nuScence and Waymo). Experimental results demonstrated that the accuracy and speed (27.8 FPS) of our model could effectively support object detection for autonomous driving in various scenarios. © 2022 IEEE.

关键词： Object detection

Exploring the Mechanism of Electron Transfer-Mediated Peroxymonosulfate Activation Over Cu-Based Catalyst for the Selective Decomposition of Bisphenol a

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SSRN 2023年

作者： Chen, Xiang Guo, Tao Yin, Lifeng Zhang, Yuanzheng Niu, Junfeng Crittenden, John C. State Key Laboratory of Water Environment Simulation School of Environment Beijing Normal University Beijing100875 China College of Environment Science and Engineering North China Electric Power University Beijing102206 China School of Civil and Environmental Engineering The Brook Byers Institute for Sustainable Systems Georgia Institute of Technology AtlantaGA30332 United States

Effective degradation of aquatic contaminants heavily depends on the adsorption of peroxymonosulfate (PMS) on active sites of catalysts. However, the influence of PMS adsorption state on PMS activation has not been well-explored. In this study, catalyst of dispersed Cu atoms on nitrogen-doped carbon skeleton (Cu-NC) was highly selective and efficient in decomposing bisphenol A (BPA) by activating PMS. Surprisingly, dosing sequence of PMS and BPA had a decisive effect on activation. When PMS were added before BPA, the activity of Cu-NC/PMS system was significantly inhibited, conversely the activity of Cu-NC/PMS system was higher. And the kinetic rate was as high as 0.997 min-1, over 99.9% of BPA removed in 3 min. Accordingly, we determined the degradation process was dominated by electron transfer from BPA to Cu-NC through various experiments and characterizations. Density functional theory (DFT) simulation indicated that PMS with bridging adsorption on the Cu site had more suitable adsorption energy which induced more intensely electron transfer and destroyed electron donors (BPA) more efficiently and highly selectively. Therefore, we propose a mechanism for PMS activation based on the capture of electrons from Cu-NC. In this mechanism, the electron donor (BPA) acts as the initiating factor for PMS activation, while the adjacent Cu sites optimizes the adsorption configuration of PMS, accelerating electron transfer. These two factors synergistically achieve efficient pollutant removal. © 2023, The Authors. All rights reserved.

关键词： Adsorption

Releasing Characteristics and Influencing Factors Analysis of Nitrogen-Containing Gaseous Pollutants in Wastewater Treatment Plants with Sequencing Batch Reactor Process

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SSRN 2024年

作者： Ma, Linlin Dong, Yufan Du, Xue Yang, Qing Zou, Kehua National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology Beijing University of Technology Beijing100124 China Key Laboratory of Odor Pollution Control in Ministry of Ecology and Environment of the People's Republic of China Tianjin Academy of Eco-environmental Sciences Tianjin300191 China China Nuclear Power Engineering Co. Ltd. Beijing100840 China

The discharge of nitrogen-containing gaseous pollutants from wastewater treatment plants (WWTP) has caused a certain threat to the surrounding environment and human health, which has attracted wide attention in recent years. This study investigated the release characteristics of nitrogen-containing pollutants at different treatment stages in WWTP with sequencing batch reactor (SBR) process, including nitrogen-containing odorous gases (NH3 and dimethylamine) and nitrogen-containing greenhouse gases (N2O), all of which achieved the highest release in the aeration stage, with emissions of 35.2, 12.5 mg/(m2·d) and 229.7 mg/L, respectively. Besides, the emission factors of NH3 and dimethylamine were calculated for 0.0091 and 0.0026 g/m3, and the carbon emission of N2O was estimated for 158.4 kg of CO2 per day. Furthermore, the pilot experiment of SBR showed that the odorous gas decreased first and then increased with the increase of aeration intensity and sludge concentration, and increased with the increase of influent chemical oxygen demand (COD) concentration. This study provides theoretical and data support for the emission reduction of nitrogen-containing pollutants in SBR process WWTP. © 2024, The Authors. All rights reserved.

关键词： Nitrogen

On-Line Characterization of Squalane Aerosols Using Thermal Desorption/Tunable Vacuum Ultraviolet Time-of-Flight Photoionization Aerosol Mass Spectrometry

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SSRN 2025年

作者： Hu, Changjin Huang, Mingqiang Zhu, Mincong Wei, Nana Hu, Renzhi Mikuska, Pavel Vecera, Zbyněk Gai, Yanbo Lin, Xiaoxiao Gu, Xuejun Zhao, Weixiong Zhang, Weijun Zhang, Hang Chen, Jun Liu, Fuyi Shan, Xiaobin Sheng, Liusi Liu, Xiaoyan Li, Biao Laboratory of Atmospheric Physico-Chemistry Anhui Institute of Optics and Fine Mechanics HFIPS Chinese Academy of Sciences Anhui Hefei230031 China Fujian Provincial Key Laboratory of Modern Analytical Science and Separation Technology College of Chemistry and Chemical Engineering and Environment Minnan Normal University Zhangzhou363000 China Ningxia Key Laboratory of Green Catalytic Materials and Technology College of Chemistry and Chemical Engineering Ningxia Normal University Guyuan756099 China Key Laboratory of Environment Optics and Technology Anhui Institute of Optics and Fine Mechanics HFIPS Chinese Academy of Sciences Anhui Hefei230031 China Institute of Analytical Chemistry Czech Academy of Sciences Veveri 97 BrnoCZ-60200 Czech Republic School of Environmental Science and Optoelectronic Technology University of Science and Technology of China Anhui Hefei230026 China National Synchrotron Radiation Laboratory University of Science and Technology of China Hefei230029 China School of Pharmacy Anhui Medical University Anhui Hefei230026 China

Organic aerosols (OA) contribute significantly to the total mass of fine aerosols in the lower troposphere, exerting effects on the global climate, regional air pollution and human health. Therefore, analysis of chemical composition of OA in real time is vital to understand the formation and reaction mechanism of organic aerosols. In this work, vacuum ultraviolet (VUV) photoionization mass spectra of squalane aerosol, a good proxy for long chain hydrocarbons often found in ambient OA, has been performed with a home-made thermal desorption/tunable VUV photoionization aerosol time-of-flight mass spectrometer based on synchrotron radiation (SR). The dependence of photoionizaiton mass spectra of squalane aerosols upon the vaporization temperature and the ionization energy were investigated in detail. The ionization energy (IE) of the parent molecule (IEsq=9.43 eV) and the corresponding appearance energies (AEs) of the fragments ions were determined. It is shown that the choice of the appropriate vaporization temperature is helpful to analysis of mass spectra of OA, and the measurement of photoionization efficiency (PIE) curve is crucial to identify the molecular chemical component of the fragment ions. The dissociative photoionization of squalane aerosol was further studied theoretically with ab initio calculations at M062X level. The qualitative agreement between experimental and theoretical results on dissociative photoionization channels demonstrated that the mechanism of dissociative photoionization of squalane aerosol can be studied with controlling the vaporization temperature, which is meaningful to chemical composition analysis of OA in atmosphere. The findings in this work indicate the potential application of soft ionization aerosol mass spectrometry based on SR for characterization of atmospheric aerosols, especially OA. © 2025, The Authors. All rights reserved.

关键词： Atmospheric aerosols

Concurrent Dominant Pathways of Multifunctional Products Formed from Nocturnal Isoprene Oxidation

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SSRN 2022年

作者： Li, Haiwei Cui, Long Huang, Yu Zhang, Yunjiang Wang, Junfeng Chen, Mindong Ge, Xinlei Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control Collaborative Innovation Center of Atmospheric Environment and Equipment Technology School of Environmental Sciences and Engineering Nanjing University of Information Science and Technology Nanjing210044 China Key Laboratory of Aerosol Chemistry and Physics Institute of Earth Environment Chinese Academy of Sciences Xi’an710061 China

Determination of dominant chemical pathways toward the formation of nocturnal secondary organic aerosols (SOA) remains ambiguous by which nitrogen oxides (NOx) always affect oxidation of volatile alkenes. Here, comprehensive chamber simulations on dark isoprene ozonolysis were conducted under different nitrogen dioxides (NO2) mixing ratios to exam multiple functionalized isoprene oxidation products. Aside from that the oxidation processes were concurrently driven by nitrogen radical (NO3) and small hydroxyl radicals (OH), ozone (O3) cycloaddition at isoprene was launched initially regardless of NO2 to rapidly form first-generation oxidation products, i.e., carbonyls and Criegee intermediates (CI) referred to carbonyl oxides. They could further undergo complicated self- and cross-reactions to produce alkylperoxy radicals (RO2). Corresponding to yields of the C5H10O3 tracer, weak OH pathway at night was credited to ozonolysis of isoprene but suppressed by unique NO3 chemistry. Following the ozonolysis of isoprene, NO3 played a crucial supplementary role in nighttime SOA formation. The ensuing production of gas-phase nitrooxy carbonyls (the first-generation nitrates) became dominant in the production of a sizeable pool of organic nitrates (RO2NO2). By contrast, isoprene dihydroxy dinitrates (C5H10N2O8) were outstanding with the elevated NO2, related to typical second-generation nitrates. As such, the yielding number concentrations of dark SOA were promoted to approximately 1.8 × 104 cm−3 but presented a nonlinear relation with excess high-NO2 condition. This study provides valuable insights into importance of multifunctional organic compounds from alkene oxidation to constitute nighttime SOA. © 2022, The Authors. All rights reserved.

关键词： Oxidation