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Synthesis of a novel magnetic biomass-MOF composite for the efficient removal of phosphates:Adsorption mechanism and characterization study

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Chinese Journal of Chemical Engineering 2023年第10期62卷 202-216页

作者： Aaron Albert Aryee Chenping Gao runping han Lingbo Qu College of Chemistry Green Catalysis CenterZhengzhou UniversityZhengzhou 450001China

The adverse effects of eutrophication have prompted the use of various remediation techniques for phosphate(PO_(4)^(3-))removal owing to it being the major causative ***,the influence of different solvents and ratios of 2-aminoterepthalicacid on the efficiency of magnetic biomass metal-organic framework composites based on the in situ growth of NH_(2)-MIL-101(Fe)onto magnetized peanut husks towards PO_(4)^(3-)removal was assessed via the adsorption *** magnetic biocomposite labelled as MPN@NH2-MIL-101(Fe)exhibited the best efficiency owing to its mesoporous structures and presence of abundant oxygen and nitrogen possessing functional *** results confirmed MPN@NH2-MIL-101(Fe)to have a high adsorption capacity of(14.0±0.3)mg·L^(-1)at a PO43-concentration of 20 mg·L^(-1)with an associated high stability within pH *** adsorption kinetics for the process was well described by both Elovich and pseudo-second-order kinetic models and was mediated by both internal diffusion and liquid film *** Temkin and Freundlich models fitted the equilibrium data well signifying occurrence of both physical and chemical adsorption on a heterogeneous *** is concluded that MPN@NH2-MIL-101(Fe)is a promising adsorbent for the effective removal of phosphate from a water body.

关键词： Magnetic biomass-MOF composite Adsorption Phosphate Mechanism

基于Conformer的实时多场景说话人识别模型

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计算机工程与应用 2024年第7期60卷 147-156页

作者：宣茜韩润萍高静欣北京服装学院文理学院北京100029 北京服装学院服装艺术与工程学院北京100029

为解决在多场景(跨域、长时以及噪声干扰语音场景)下说话人确认系统性能较差的问题,提出了一种基于Conformer构建的、实时多场景鲁棒的说话人识别模型——PMS-Conformer。PMS-Conformer的设计灵感来自于先进的模型MFA-Conformer。PMS-Co... 详细信息

为解决在多场景(跨域、长时以及噪声干扰语音场景)下说话人确认系统性能较差的问题,提出了一种基于Conformer构建的、实时多场景鲁棒的说话人识别模型——PMS-Conformer。PMS-Conformer的设计灵感来自于先进的模型MFA-Conformer。PMS-Conformer对MFA-Conformer的声学特征提取器、网络组件和损失函数计算模块进行了改进,其具有新颖有效的声学特征提取器,以及鲁棒的、具有较强泛化能力的声纹嵌入码提取器。基于VoxCeleb1&2数据集实现了PMS-Conformer的训练;开展了PMS-Conformer与基线MFA-Conformer以及ECAPA-TDNN在说话人确认任务上的性能对比评估实验。实验结果表明在长语音SITW、跨域VoxMovies以及加噪处理的VoxCeleb-O测试集上,以PMS-Conformer构建的说话人确认系统的性能比用这两个基线构建的说话人确认系统更有竞争力;并且在声纹嵌入码提取器的可训练参数(Params)和推理速度(RTF)方面,PMS-Conformer明显优于ECAPA-TDNN。实验结果说明了PMS-Conformer在实时多场景下具有良好的性能。

关键词：说话人确认 MFA-Conformer Sub-center AAM-Softmax 声纹嵌入码声学特征提取

Mechanisms and reusability potentials of zirconium-polyaziridine-engineered tiger nut residue towards anionic pollutants

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中国化学工程学报:英文版 2023年第8期60卷 275-292页

作者： Alexander Nti Kani Evans Dovi Aaron Albert Aryee runping han Zhaohui Li Lingbo Qu College of Chemistry Green Catalysis CenterZhengzhou UniversityZhengzhou 450001China

Access to fresh water,its availability,and its quality are a global challenge to humanity,largely due to human activities in the ***,global water security has been jeopardized,requiring urgent remediation to safeguard our very ***,a novel and facilely engineered zirconium and polyethylenimine adsorbent based on tiger nut residue (TNR) was prepared,and its adsorptive capabilities towards a model dyestuff and nutrient were invested through a batch adsorption *** developed adsorbent,zirconium-polyethylenimine-engineered tiger nut residue (TNR@PEI–Zr) was characterised by scanning electron microscopy,Fourier-transform infrared spectroscopy,X-ray diffraction analysis,and X-ray photoelectron spectroscopy to understand its morphology and surface chemistry and predict its adsorption ***@PEI–Zr had a p H point of zero charge (pH_(zpc)) of *** introduction of salts inhibited the removal efficiency of Alizarin red (AR) and phosphate (PO_(4)^(3–)) in the order of HCO_(3)^(-)>SO_(4)^(2–)>Cl^(-).Increasing temperatures (293–313 K) favoured the adsorption process at pH *** Langmuir model suited the adsorption processes of both AR and PO_(4)^(3–),implying homogenous and monolayer removal of pollutants with a maximal capacity of 537.8 mg·g^(-1)and 100.5 mg·g^(-1)at a dose of 0.01 g,*** rate-determining steps of AR and PO_(4)^(3–)followed a pseudo-secondorder kinetic model and were thermodynamically spontaneous with an increase in randomness at the solid-solution *** adsorbent’s recyclability was notable and outperformed most adsorbents in terms of removal ***@PEI–Zr was found to be stable,and its use in practical wastewater decontamination was effective,ecologically acceptable and free of secondary pollution problems.

关键词： Adsorption Modified tiger nut residue Alizarin red Phosphate Leaching Regeneration

Removal of Uranium（Ⅵ） by Fixed Bed Ion-exchange Column Using Natural Zeolite Coated with Manganese Oxide

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Chinese Journal of Chemical Engineering 2009年第4期17卷 585-593页

作者：邹卫华赵蕾韩润平 School of Chemical and Energy Engineering Zhengzhou UniverityZhengzhou 450001China Department of Chemistry Zhengzhou UniversityZhengzhou 450001China Luoyang Company of China Petrolum & Chemical Corporation Luoyang 471012China

The adsorption of uranium(Ⅵ)on the manganese oxide coated zeolite(MOCZ)from aqueous solution was investigated in a fixed-bed *** experiments were conducted to investigate the effects of bed height,flow rate,particle size,initial concentration of uranium(Ⅵ),initial pH,presence of salt and competitive *** U-uptake by MOCZ increased with initial uranium(Ⅵ)concentration and bed height,but decreased as the flow rate and particle size *** the presence of salt and competitive ions,the breakthrough time was *** adsorption capacity reached a maximum at pH of *** Thomas model was applied to the experimental data to determine the characteristic parameters of the column for process design using linear *** breakthrough curves calculated from the model were in good agreement with the experimental *** BDST model was used to study the influence of bed height on the adsorption of uranium(Ⅵ).Desorption of uranium(Ⅵ)in the MOCZ column was *** column could be used for at least four adsorption-desorption cycles using 0.1mol.L-1 NaHCO3 solution as the *** desorption and regeneration with deionized water,MOCZ could be reused to adsorb uranium(Ⅵ)at a comparable *** to raw zeolite,MOCZ showed better capacity for uranium(Ⅵ)removal.

关键词： adsorption uranium (Ⅵ) manganese oxide coated zeolite regeneration

Luminescence modulation of ultrasmall gold clusters by aromatic ligands

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Nano Research 2023年第8期16卷 11366-11374页

作者： Xue-Jing Zhai Jia-Hua Hu Jianxin Guan Yubing Si Xi-Yan Dong Peng Luo Fangfang Pan Zhihao Yu runping han Shuang-Quan Zang College of Chemistry Zhengzhou UniversityZhengzhou 450001China College of Chemistry and Chemical Engineering Henan Polytechnic UniversityJiaozuo 454003China College of Chemistry and Molecular Engineering Peking UniversityBeijing 100871China College of Chemistry Central China Normal UniversityWuhan 430079China

Luminescence is one of the most important properties for metal nanoclusters;however,clearly revealing its origin remains *** different luminescence properties of the two prototypical 8e nanoclusters Au_(11)and Au_(13)remain elusive—Au_(11)is always nonluminescent,whereas Au_(13)is *** this work,by using a designed unique aromatic ligand(quinoline-2-thiol),we obtained new atomically precise phosphine-thiolate-protected neutral Au_(11)-SH and cationic Au_(13)-*** comparison with the classic phosphine-halide-protected Au_(11)-Cl and Au_(13)-Cl,the Cl-to-thiol alteration triggered room-temperature luminescence of the Au_(11)core and dramatically modulated that of the Au_(13)*** ultraviolet/infrared(UV/IR)spectroscopy,which is sensitive to organic aromatic groups,together with ultrafast transient absorption(TA)spectroscopy unprecedently revealed a relaxation process from the ligand to core state affecting the dynamics in excited states and some critical intermediate states favouring efficient room-temperature emission of these *** work provides some new insights into the origin of photoluminescence of metal nanoclusters and opens an avenue to modulate the dynamics of their excited states using aromatic ligands,which would have direct applications in lighting,light harvesting,and photocatalysis.

关键词： metal nanoclusters luminescence ligand modification

A novel Ag/ZnO core-shell structure for efficient sterilization synergizing antibiotics and subsequently removing residuals

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Green Energy & Environment 2024年第2期9卷 366-377页

作者： Wenmei han Wenli Wang Jie Fan runping Jia Xuchun Yang Tong Wu Qingsheng Wu School of Chemical Science and Engineering Shanghai Key Laboratory of Chemical Assessment and SustainabilityInstitute of Advanced StudyTongji UniversityShanghai200092China College of Textile and Clothing Engineering China National Textile and Apparel Council Key Laboratory of Natural DyesSoochow UniversitySuzhou215123China Department of Urology Shanghai First People’s HospitalSchool of MedicineShanghai Jiaotong UniversityShanghai200080China School of Materials Science and Engineering Shanghai Institute of TechnologyShanghai201418China

The massive use of antibiotics has led to the aggravation of bacterial resistance and also brought environmental pollution *** poses a great threat to human *** the dosage of antibiotics is reduced by increasing its bactericidal performance,the emergence of drug resistance is certainly delayed,so that there's not enough time for developing drug resistance during ***,we selected typical representative materials of metal Ag and semiconductor ZnO nano-bactericides to design and synthesize Ag/ZnO hollow core-shell structures(AZ for short).Antibiotics are grafted on the surface of AZ through rational modification to form a composite sterilization *** research results show that the antibacterial efficiency of the composite system is significantly increased,from the sum(34.7%+22.8%-57.5%)of the antibacterial efficiency of AZ and gentamicin to 80.2%,net synergizes 22.7%,which fully reflects the effect of 1+1>***,the dosage of antibiotics can be drastically reduced in this way,which makes both the possibility of bacterial resistance and medical expenses remarkably ***,residual antibiotics can be degraded under simple illumination using AZ-self as a photocatalyst,which cuts off the path of environmental *** short,such an innovative route has guiding significance for drug resistance.

关键词： Ag/ZnO hollow Core-shell structures Antibiotics Gentamycin Synergistic sterilization Photodegradation

氢化物发生-原子荧光法研究天然水体中亚硒酸盐的微生物转化

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光谱学与光谱分析 1999年第2期19卷 196-197页

作者：韩润平李建军金强郑州大学化学系上海机电设计院

用氢化物发生－原子荧光法测定天然水体中亚硒酸盐的微生物转化产物——单质硒Ｓｅ°（ｓ）和挥发态硒（ＶＳｅ）。主要产物为单质硒，加入碳源促进亚硒酸盐的转化。

关键词：亚硒酸盐微生物转化天然水硒水分析

Clothing Image Detection and Recognition Based on Faster RCNN

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Clothing Image Detection and Recognition Based on Faster RCN...

Epigenetic modification in liver fibrosis:Promising therapeutic direction with significant challenges ahead

作者： Shuaifei Ji runping han Jianfeng Wei Rui Wang Chinese Fashion Science & Technology Research Institute Beijing Institute of Fashion Technology School of Information Engineering Beijing Institute of Fashion Technology

Clothing image detection and recognition algorithm is proposed in this paper,which involves the design of two neural network models based on improved Faster R-CNN [1].In our work,in order to train neural networks,ModaNet [2] dataset is selected and improvements on it are made,that is,the improper bounding boxes of footwear and boots in ModaNet dataset are modified based on their polygon ***,by making the following improvements on Faster R-CNN,our two neural network models are established,which use VGG16[3] and the first 40 layers of ResNet50 [4] as feature extration network,*** using ResNet50 for feature extraction,the last 10 layers of ResNet50 are selected as part of the final classification and regression *** addition,the softmax activation function in RPN is replaced with *** experimental comparison,it is found that both of these two models can well accomplish the task.

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Acta Pharmaceutica Sinica B 2024年第3期14卷 1009-1029页

作者： runping Liu Yajing Li Qi Zheng Mingning Ding Huiping Zhou Xiaojiaoyang Li School of Chinese Materia Medica Beijing University of Chinese MedicineBeijing 102400China School of Life Sciences Beijing University of Chinese MedicineBeijing 102400China Department of Microbiology and Immunology Virginia Commonwealth UniversityRichmondVA 22460USA

Liver fibrosis,characterized by scar tissue formation,can ultimately result in liver ***’s a major cause of morbidity and mortality globally,often associated with chronic liver diseases like hepatitis or alcoholic and non-alcoholic fatty liver ***,current treatment options are limited,highlighting the urgent need for the development of new *** a reversible regulatory mechanism,epigenetic modification is implicated in many biological processes,including liver *** the epigenetic mechanisms involved in liver fibrosis could provide valuable insights into developing new treatments for chronic liver diseases,although the current evidence is still *** review provides a comprehensive summary of the regulatory mechanisms and critical targets of epigenetic modifications,including DNA methylation,histone modification,and RNA modification,in liver fibrotic *** potential cooperation of different epigenetic modifications in promoting fibrogenesis was also ***,available agonists or inhibitors regulating these epigenetic mechanisms and their potential application in preventing liver fibrosis were *** summary,elucidating specific druggable epigenetic targets and developing more selective and specific candidate medicines may represent a promising approach with bright prospects for the treatment of chronic liver diseases.

关键词： Liver fibrosis Epigenetics regulation DNA methylation Histone acetylation Histone methylation mRNA methylation Non-coding RNA Drug development