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氮掺杂碳阳极电化学处理水中难降解有机污染物研究进展

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化工新型材料 2024年第3期52卷 60-65页

作者：梁凤苗娟周新全彭淑鸽魏学锋河南科技大学化学化工学院洛阳471000

电化学氧化处理难降解有机污染物具有快速、高效等优点,具有良好应用前景。近年来,氮掺杂碳材料因其特殊结构被广泛用于电化学水处理领域。列举了常见的氮掺杂碳阳极材料,比较了各种氮掺杂碳修饰阳极降解水中污染物的效能,简要梳理了氮... 详细信息

电化学氧化处理难降解有机污染物具有快速、高效等优点,具有良好应用前景。近年来,氮掺杂碳材料因其特殊结构被广泛用于电化学水处理领域。列举了常见的氮掺杂碳阳极材料,比较了各种氮掺杂碳修饰阳极降解水中污染物的效能,简要梳理了氮掺杂碳对电极性能作用影响的机理,并对该类阳极在电催化降解水中污染物进行了展望。

关键词：氮掺杂碳阳极电催化水处理

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短程硝化-厌氧氨氧化工艺的挑战与对策

化学通报 2024年第2期87卷 209-217,225页

作者：任书博张宁张瑞昌周鸣赵远魏学锋河南科技大学化学化工学院洛阳471000

短程硝化-厌氧氨氧化(PN/A)工艺与传统生物脱氮工艺相比,具有能耗低、设备简单、污泥产率低等诸多优点,在污水脱氮领域备受关注。本文首先总结了PN/A工艺在实际应用中存在的一些挑战,如处理高C/N废水效果不佳、亚硝酸盐氧化细菌(NOB)抑... 详细信息

短程硝化-厌氧氨氧化(PN/A)工艺与传统生物脱氮工艺相比,具有能耗低、设备简单、污泥产率低等诸多优点,在污水脱氮领域备受关注。本文首先总结了PN/A工艺在实际应用中存在的一些挑战,如处理高C/N废水效果不佳、亚硝酸盐氧化细菌(NOB)抑制困难、启动缓慢等,针对上述挑战提出了一些PN/A工艺的改进措施。可使用多种预处理技术来降低废水有机物含量,以减弱高C/N比废水的负面影响;根据NOB、厌氧氨氧化菌(AnAOB)、氨氧化细菌(AOB)之间生长条件的差异,通过调控温度、pH、溶解氧等环境条件或添加抑制剂来抑制NOB的生长。接着,总结了PN/A工艺快速启动的方法,即通过添加化学物质、物理场、外加AnAOB种泥并给予AnAOB最佳生长条件等方法,实现PN/A工艺的快速启动。最后,展望了该工艺未来有待深入研究的方向。

关键词：短程硝化-厌氧氨氧化高碳氮比厌氧氨氧化菌亚硝酸盐氧化菌抑制快速启动

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微生物菌种对生物滴滤器处理甲苯性能的影响

化工环保 2024年第3期44卷 405-410页

作者：赵海洋张瑞昌朱书法张宁于卓魏学锋河南科技大学化学化工学院河南洛阳471003

研究了微生物菌种对生物滴滤器(BTF)处理甲苯废气性能的影响。分别采用单一铜绿假单胞菌、铜绿假单胞菌-河流弧菌-不动杆菌和铜绿假单胞菌-河流弧菌-不动杆菌-柠檬酸杆菌-肠杆菌3种微生物菌种组合启动BTF,考察在不同停留时间下的甲苯去... 详细信息

研究了微生物菌种对生物滴滤器(BTF)处理甲苯废气性能的影响。分别采用单一铜绿假单胞菌、铜绿假单胞菌-河流弧菌-不动杆菌和铜绿假单胞菌-河流弧菌-不动杆菌-柠檬酸杆菌-肠杆菌3种微生物菌种组合启动BTF,考察在不同停留时间下的甲苯去除率。实验结果表明:3种微生物菌种组合均可在6 d内快速启动BTF,甲苯去除率均达90%以上;停留时间100 s时,3种微生物菌种组合启动的BTF甲苯去除率均高于80%;停留时间缩短至60 s后,多菌株混合启动的BTF甲苯去除率明显下降,单一铜绿假单胞菌启动的BTF甲苯去除率仍可达90%以上,去除负荷达12 g/(m^(3)·h)。

关键词：生物滴滤器甲苯铜绿假单胞菌停留时间

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心力衰竭合并室性心律失常患者心率变异性与心功能的相关性

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中国实用医刊 2024年第12期51卷 16-19页

作者：强玉娜吕树志韦雪锋南阳市第二人民医院心内四科南阳473000

目的分析心力衰竭合并室性心律失常患者心率变异性(HRV)与心功能的相关性。方法回顾性抽取2021年1月至2023年6月南阳市第二人民医院收治的76例心力衰竭合并室性心律失常患者作为观察组,按照1∶1比例抽取76例单纯心力衰竭患者作为单纯组... 详细信息

目的分析心力衰竭合并室性心律失常患者心率变异性(HRV)与心功能的相关性。方法回顾性抽取2021年1月至2023年6月南阳市第二人民医院收治的76例心力衰竭合并室性心律失常患者作为观察组,按照1∶1比例抽取76例单纯心力衰竭患者作为单纯组。所有患者检测HRV时域指标[24 h内每5 min的R-R间期标准差(SDNN)、R-R间期平均差(SDANN)、邻近R-R间期均方差(rMSSD)、相邻心动周期≥50 ms的R-R间期差值百分比(PNN50)]和心功能指标[左心心射血分数(LVEF)、左心室舒张末期内径(LVEDD)、左心房内径(LA)],比较两组上述指标水平,应用Pearson检验分析HRV与心功能的相关性。结果观察组24 h内每5 min的SDNN、SDANN、rMSSD、PNN50低于单纯组(P<0.05)。观察组LVEF低于单纯组(P<0.05),LVEDD、LA高于单纯组(P<0.05)。Pearson结果显示,SDNN、SDANN、rMSSD、PNN50与LVEF呈正相关(r=0.47、0.52、0.50、0.60,P均<0.05),与LVEDD、LA呈负相关(r=-0.45、-0.46,-0.42、-0.52,-0.56、-0.49,-0.58、-0.62;P均<0.05)。结论心力衰竭合并室性心律失常患者HRV与心功能相关,HRV时域指标较低时LVEDD、LA较高而LVEF较低。

关键词：心力衰竭室性心律失常心率变异性心功能

丘北江边蚌常林场森林资源现状与可持续经营对策

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内蒙古林业调查设计 2024年第2期47卷 14-17页

作者：张以棚宋永全卢腾飞魏雪峰云南省林业调查规划院昆明650051 西南林业大学林学院昆明650051

文章对丘北江边蚌常林场森林资源现状进行评价,得出结论:乔木林地和灌木林地面积较大,比重达86.86%;林地保护等级以Ⅱ级为主,比重为71.00%;生态公益林面积和商品林面积比例为71:29;乔木林中,中、幼龄林比重大,达到93.40%。在此基础上,... 详细信息

文章对丘北江边蚌常林场森林资源现状进行评价,得出结论:乔木林地和灌木林地面积较大,比重达86.86%;林地保护等级以Ⅱ级为主,比重为71.00%;生态公益林面积和商品林面积比例为71:29;乔木林中,中、幼龄林比重大,达到93.40%。在此基础上,分析林场森林经营管理中存在的问题,并提出科学编制森林经营方案、加强中、幼龄林抚育、调整森林结构和产业结构、加强人才队伍建设等对策,以期为林场森林可持续经营提供借鉴。

关键词：森林资源可持续经营对策

Application of the finite analytic numerical method to a flowdependent variational data assimilation

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Acta Oceanologica Sinica 2024年第3期43卷 30-39页

作者： Yan Hu wei Li xuefeng Zhang Guimei Liu Liang Zhang Tianjin Key Laboratory for Marine Environmental Research and Service School of Marine Science and TechnologyTianjin UniversityTianjin 300072China School of Marine Science and Technology Tianjin UniversityTianjin 300072China National Marine Environmental Forecasting Center Ministry of Natural ResourcesBeijing 100081China

An anisotropic diffusion filter can be used to model a flow-dependent background error covariance matrix,which can be achieved by solving the advection-diffusion *** of the directionality of the advection term,the discrete method needs to be chosen very *** finite analytic method is an alternative scheme to solve the advection-diffusion *** a combination of analytical and numerical methods,it not only has high calculation accuracy but also holds the characteristic of the auto *** demonstrate its ability,the one-dimensional steady and unsteady advection-diffusion equation numerical examples are respectively solved by the finite analytic *** more widely used upwind difference method is used as a control *** result indicates that the finite analytic method has higher accuracy than the upwind difference *** the two-dimensional case,the finite analytic method still has a better *** the three-dimensional variational assimilation experiment,the finite analytic method can effectively improve analysis field accuracy,and its effect is significantly better than the upwind difference and the central difference ***,it is still a more effective solution method in the strong flow region where the advective-diffusion filter performs most prominently.

关键词： finite analytic method advection-diffusion equation data assimilation flow-dependent

Bioinspired integrated triboelectric electronic tongue

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Microsystems & Nanoengineering 2024年第3期10卷 97-108页

作者： Jiaming Liu Jingui Qian Murtazt Adil Yali Bi Haoyi Wu xuefeng Hu Zuankai Wang wei Zhang Anhui Province Key Laboratory of Measuring Theory and Precision Instruments School of Instrumental Science and Optoelectronics EngineeringHefei University of Technology230009 HefeiAnhuiChina School of Physics and Optoelectronic Engineering Guangdong University of Technology510006 GuangzhouGuangdongChina Department of Mechanical Engineering The Hong Kong Polytechnical UniversityHong Kong SARChina

An electronic tongue(E-tongue)comprises a series of sensors that simulate human perception of taste and embedded artificial intelligence(AI)for data analysis and *** E-tongues based on electrochemical methods suffer from a bulky size and require larger sample volumes and extra power sources,limiting their applications in in vivo medical diagnosis and analytical *** by the mechanics of the human tongue,triboelectric components have been incorporated into E-tongue platforms to overcome these *** this study,an integrated multichannel triboelectric bioinspired E-tongue(TBIET)device was developed on a single glass slide chip to improve the device’s taste classification accuracy by utilizing numerous sensory *** detection capability of the TBIET was further validated using various test samples,including representative human body,environmental,and beverage *** TBIET achieved a remarkably high classification *** instance,chemical solutions showed 100%identification accuracy,environmental samples reached 98.3%accuracy,and four typical teas demonstrated 97.0%***,the classification accuracy of NaCl solutions with five different concentrations reached 96.9%.The innovative TBIET exhibits a remarkable capacity to detect and analyze droplets with ultrahigh sensitivity to their electrical ***,it offers a high degree of reliability in accurately detecting and analyzing various liquid samples within a short *** development of a self-powered portable triboelectric E-tongue prototype is a notable advancement in the field and is one that can greatly enhance the feasibility of rapid on-site detection of liquid samples in various settings.

关键词： electronic utilizing overcome

Sensitive and Specific Y-Shaped Ratio Biosensor for Detecting Serum mi R-18a:Potential Early Scanning Tool for Non-Small Cell Lung Cancer

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Journal of Analysis and Testing 2024年第2期8卷 237-244页

作者： Fei Yu Yue Wang Caiyuan Yu wei Zhang xuefeng Bai State Key Laboratory of Quality Research in Chinese Medicines Macao Institute for Applied Research in Medicine and HealthMacao University of Science and TechnologyTaipaMacao999078China Baotou Cancer Hospital Baotou014040Inner MongoliaChina

miR-18a has been identified as a significantly expressed microRNA(miRNA)in non-small cell lung cancer(NSCLC)and plays a vital role in cancer cell transformation,metastasis,and ***,a pair of binary probes from numerous probe pairs based on single nucleotide polymorphism analyses of miR-18a and miR-18b was first designed and screened to develop a Y-shaped ratio biosensor for accurate detection of serum miR-18a in *** special structure of the binary probes combined with the hairpin showed strong specificity for miR-18a,which was confirmed by polyacrylamide gel electrophoresis assay and square wave voltammetry ***,it is beneficial to immobilize single-stranded DNA(ssDNA)probes due to the large specific surface area of nanoporous gold,thereby improving the sensitivity of the *** Y-shaped ratio biosensor exhibited a wide detection range and can quantify the concentration of miR-18a in the range of 10 fmol/L–100 pmol/L,with a limit of detection of 0.211 fmol/L(S/N=3).Moreover,it exhibits excellent detection capabilities in serum samples since the biosensor showed a high selectivity toward the coexistence of miR-18a and ***,the prepared Y-shaped ratio biosensor is a highly sensitive and specific miR-18a detection tool,capable of identifying microscopic amounts of miR-18a in serum samples,providing great potential for early screening of NSCLC.

关键词： Nanoporous gold Y-shaped biosensor miR-18a NSCLC

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Al-O_(2)-酸体系降解苯酚的研究

化学推进剂与高分子材料 2024年第3期22卷 35-41页

作者：李培航井文杰靳朝喜于向辉李新鹏鲁潇魏学锋河南省洛阳生态环境监测中心河南洛阳471000 黎明化工研究设计院有限责任公司河南洛阳471000 河南科技大学化学化工学院河南洛阳471023

研究了Al–O_(2)–酸体系对水中苯酚的降解。实验表明在ρ(Al)=4g/L,ρ(溶解氧)=9.08mg/L,pH=2的条件下,20mg/L苯酚降解5h,去除率可达99.71%。以亚甲基蓝为·OH的捕集剂,采用分光光度法间接测定·OH产生过程,DMP(2,9–二甲基–1,10–菲... 详细信息

研究了Al–O_(2)–酸体系对水中苯酚的降解。实验表明在ρ(Al)=4g/L,ρ(溶解氧)=9.08mg/L,pH=2的条件下,20mg/L苯酚降解5h,去除率可达99.71%。以亚甲基蓝为·OH的捕集剂,采用分光光度法间接测定·OH产生过程,DMP(2,9–二甲基–1,10–菲啰啉)分光光度计测定H_(2)O_(2)浓度。Al–O_(2)–酸体系是一个Al介导的过程,其中Al^(0)(零价铝)诱导·OH,然后氧化苯酚。H_(2)O_(2)的增减趋势与·OH检测浓度和苯酚降解趋势一致。苯酚在Al–O_(2)–酸体系中的降解具有明显的pH依赖性,并遵循伪一级动力学。在实验条件下,苯酚降解的表观活化能为74.49kJ/mol。Al–O_(2)–酸体系在含苯酚废水的降解中效率高、成本低,应用前景良好。

关键词：羟基自由基活性氧零价铝苯酚高级氧化