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Roles of soluble minerals in Cd sorption onto rice straw biochar

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Journal of Environmental Sciences 2022年第3期34卷 64-71页

作者： Ying-heng Fei Zuannan Zhang Zhuofeng Ye qihang wu Ye-tao Tang Tangfu Xiao School of Environment Science and Engineering Guangzhou UniversityGuangzhou 510006China School of Environment Science and Engineering Sun Yat-sen UniversityGuangzhou 510006China

Transforming to biochar provides an environmentally friendly approach for crop residue reutilization,which are usually applied as sorbent for heavy metal *** typical siliconrich material,the specific sorptive mechanisms of rice straw derived biochar(RSBC)are concerned,especially at the low concentration range which is more environmentally *** the present study,Cd sorption onto RSBCs at the concentration of ≤5 mg/L was *** sorptive capacity was positively correlated with the pyrolytic temperature of the biochar and the environmental pH *** soluble minerals of the RSBCs played the dominant roles in Cd sorption,contributing 29.2%,62.5%and 82.9%of the total sorption for RSBCs derived under 300℃,500℃and 700℃,*** number of cations,dominantly K^(+),were exchanged during the *** with cations and carbonates may also be contributive to the *** dissolution of silicon-containing minerals was found to be declined during sorption,suggesting its involvement in the sorption process,possibly through ***,the sparingly soluble silicate crystals may impose ignorable role in the *** with organic groups is only a minor mechanism in Cd sorption,compared to the much more dominant roles of the inorganic ashes.

关键词： Cadmium Sorption Rice straw Biochar Silicon-rich

Full-scale evaluation of reversed A^(2)/O process for removal of multiple pollutants in sewage

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Chinese Chemical Letters 2020年第10期31卷 2825-2830页

作者： qihang wu Haiyan Li Xiaodong Hu Yongfeng Shi Deguan Kong Yucheng Zhang Bixian Mai Dongye Zhao Jie Fu Institute of Environmental Research at Greater Bay Area Key Laboratory for Water Quality and Conservation of the Pearl River DeltaMinistry of EducationGuangzhou UniversityGuangzhou 510006China School of Civil Engineering Guangzhou UniversityGuangzhou 510006China School of Civil and Architectural Engineering Guizhou University of Engineering ScienceBijie 551700China School of Environmental Science and Engineering Guangzhou UniversityGuangzhou 510006China State Key Laboratory of Organic Geochemistry Guangzhou Institute of GeochemistryChinese Academy of SciencesGuangzhou 510640China Environmental Engineering Program Department of Civil EngineeringAuburn UniversityAuburnAL 36849United States School of Environmental Science and Engineering Huazhong University of Science and TechnologyWuhan 430074China

This study evaluated the removal of multiple pollutants,i.e.,polybrominated diphenyl ethers(PBDEs),novel halogenated flame retardants(HFRs),sulfonamide antibiotics(SAs),and heavy metals(HMs),by a fullscale reversed A^(2)/O process in a sewage treatment plant(STP)in Guangzhou,*** reversed A^(2)/O process demonstrated high removal efficiencies(REs)for total PBDEs(60.5%±4.3%),novel HFRs(98.4%±2.8%)and HMs(70.1%±1.2%),and a relatively low RE for SAs(25.0%±2.3%).BDE 209,the dominant PBDE congener,showed a high residual concentration(13.41±5.18 ng/L)in the suspended particulate matter(SPM)of treated *** me novel HFRs,dechlorane plus(DP)and decabromodiphe nyl ethane(DBDPE),were detected in the SPM of the raw sewage(7.50±4.14 ng/L and 11.52±11.65 ng/L,respectively).The removal ofSAs was mainly through biodegradation in the activated sludge bioreactors(ASBs).Ofthe HMs,Mn and Ni exhibited the lowest REs(47.5%±2.2%and 35.0%±2.6%,respectively),while Cr and Cu showed the highest removal(REs>80%).In terms of treatment units in the reversed A^(2)/O process,ASBs showed the highest RE(27.8%)for the multiple *** information can aid in our understanding of removal properties of STPs on various pollutants and evaluating the ecological/health risks of STPs as point pollutant sources.

关键词： Polybrominated diphenyl ethers Halogenated flame retardants Sulfonamide antibiotics Heavy metals Reversed A^2/O process

Rodlike nanomaterials from organic diradicaloid with high photothermal conversion capability for tumor treatment

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Aggregate

Aggregate 2023年第5期4卷 182-188页

作者： Tingting Sun Jiaxiang Guo Hui Wen Qing Pei qihang wu Dengyuan Hao Chuandong Dou Zhigang Xie State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchunJilinChina State Key Laboratory of Supramolecular Structure and Materials College of ChemistryJilin UniversityChangchunJilinChina

Organic diradicaloids with unique open-shell structures and properties have been widely used in organic electronics and ***,their advantageous optical properties have been explored less in the biomedical *** this work,the photothermal conversion behaviors of a boron-containing organic diradicaloid(BOD)are *** can assemble with 1,2-distearoyl-sn-glycero-3-phosphoethanolamine-poly(ethylene glycol)to form rodlike nanoparticles(BOD NPs).These as-prepared BOD NPs exhibit high photothermal conversion capability and robust photothermal ***,they possess morphological superiority,which guarantees the effective photothermal therapy of *** work thus demonstrates the promise of organic diradicaloids as efficient photothermal agents for biomedical applications.

关键词： boron-containing organic diradicaloid high photothermal conversion efficiency photothermal therapy rodlike nanostructures

An insight into aggregation kinetics of polystyrene nanoplastics interaction with metal cations

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Chinese Chemical Letters 2022年第12期33卷 5213-5217页

作者： Yucheng Zhang Xiaotong Su Nora FYTam Xiaolan Lao Meiling Zhong qihang wu Huifang Lei Zihui Chen Zhang Li Jie Fu Key Laboratory for Water Quality and Conservation of the Pearl Stream Delta Ministry of EducationSchool of Environmental Science and EngineeringGuangzhou UniversityGuangzhou 510006China State Key Laboratory of Marine Pollution and Department of Chemistry City University of Hong KongHong KongChina School of Science and Technology Open University of Hong KongHong KongChina School of Environmental Science and Engineering Huazhong University of Science and TechnologyWuhan 430074China

Once inevitably released into the aquatic environment,polystyrene nanoplastics(PS-NPs)will present complicated environmental behaviors,of which the aggregation is a key process determining their environmental fate and *** this study,the aggregation kinetics of different sizes(30 nm and 100 nm)of PS-NPs with metal cations(Na^(+),K^(+),Ca^(2+),Mg^(2+)and Pb^(2+))at different solution pH(3,6 and 8)were *** results showed that the aggregation of PS-NPs increased with cation *** Pb^(2+)as an example,the adsorption behavior of cations onto PS-NPs was determined by transmission electron microscopy(TEM)and energy dispersive X-ray(EDX)spectroscopy,which demonstrated Pb^(2+)could be adhered onto the surface of PS-NPs with the effect of charge *** critical coagulation concentrations(CCC)of smaller PS-NPs were higher than that of larger PS-NPs for monovalent cations,whereas a different pattern is observed for divalent *** was suggested that there were other factors that DLVO theory does not consider affect the stability of NPs with different particle *** addition,it should be noted that PS-NPs had the capacity of adsorbing large amounts of heavy metal cations and carried them transport to a long distance,and the corresponding ecological risks need to further elucidate.

关键词： Polystyrene nanoplastics Lead cation Aggregation kinetics Critical coagulation concentration Size effect

2018年以来美国主流智库对中国北极政策及活动的认知及所提出的对策

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极地研究 2023年第1期35卷 109-123页

作者：吴棋航国防大学国家安全学院北京100084

在中美大国竞争背景下,近年来北极问题在美国政府议程中的优先级日益凸显,并引起美国主流智库的关注。准确把握美国主流智库对中国北极政策及活动的主要认知及应对策略,对中国判断今后美国政府在北极地区的对华政策取向有重要作用。本... 详细信息

在中美大国竞争背景下,近年来北极问题在美国政府议程中的优先级日益凸显,并引起美国主流智库的关注。准确把握美国主流智库对中国北极政策及活动的主要认知及应对策略,对中国判断今后美国政府在北极地区的对华政策取向有重要作用。本文选取5家美国主流智库的10份代表性研究成果作为主要研究样本,并挑选另外4家非美国智库的7份报告以拓宽研究角度。研究发现美国主流智库围绕中国北极活动的影响及意图进行了深入探讨,重点关注了中俄北极合作,对美国政府如何应对中国北极政策与活动提供了相关对策建议。总体来看,美国主流智库认为中国的北极政策着眼长期博弈,强调中国正通过经济、科考活动扩大在北极的影响力,对中国北极活动造成影响的认识较为负面;同时美国主流智库为拜登政府提供了包括遏制中国、分化中俄、强化自身和重塑联盟等4个方面的应对策略。

关键词：中国北极政策美国主流智库认知对策

Alkyl chain engineering of boron dipyrromethenes for efficient photodynamic antibacterial treatment

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Chinese Chemical Letters 2024年第12期35卷 574-577页

作者： qihang wu Hui Wen Wenhai Lin Tingting Sun Zhigang Xie State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied ChemistryChinese Academy of Sciences School of Applied Chemistry and Engineering University of Science and Technology of China Biomedical Polymers Laboratory College of ChemistryChemical Engineering and Materials Scienceand State Key Laboratory of Radiation Medicine and ProtectionSoochow University

Photodynamic therapy has been widely employed as an alternative strategy against bacterial *** structure has a profound effect on the antibacterial ability of photosensitizers (PSs).Herein,we designed and synthesized a series of boron dipyrromethene (BODIPY)-based photosensitizers with different alkyl chain lengths,and then their antibacterial activities were *** these BODIPYs,the BODIPY with octyl (BDP-8) exhibits the best antibacterial effect,while the antibacterial performance of BODIPY with dodecyl (BDP-12) is the *** work provides instructive information for further development of effective photodynamic antimicrobial agents.

关键词： Alkyl chain engineering Antibacterial agent BODIPY Photodynamic therapy Photosensitizer

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R290低压比热泵高补气过热度循环研究

化工学报 2023年第5期74卷 1875-1883页

作者：雷博雯吴建华吴启航西安交通大学能源与动力工程学院陕西西安710049

天然工质丙烷(R290)GWP接近零,对环境友好,热物理性质优良,具有良好应用前景。高背压旋转压缩机运行压比小时,R290绝热指数小导致的排气温度低特点突出。R290在高背压旋转压缩机油池中溶解度大,R290/润滑油混合物黏度低,可能难以满足曲... 详细信息

天然工质丙烷(R290)GWP接近零,对环境友好,热物理性质优良,具有良好应用前景。高背压旋转压缩机运行压比小时,R290绝热指数小导致的排气温度低特点突出。R290在高背压旋转压缩机油池中溶解度大,R290/润滑油混合物黏度低,可能难以满足曲轴/轴承系统润滑,影响压缩机可靠性。通过研究低压比工况下,R290在润滑油中溶解度及R290/润滑油混合物黏度与其过热度的关系,提出高补气过热度经济器循环,利用冷凝器出口高温与补气饱和温度的温差带来的剩余热量提高补气过热度,从而控制排气过热度和R290/润滑油混合物的黏度。同时,高补气过热度经济器循环可以有效提高系统性能,蒸发温度-2.89℃,冷凝温度51.5℃时,相比单级循环,COP提升11.4%,单位容积制热量提升23.4%。

关键词： R290 热泵高补气过热度补气增焓循环动力黏度

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齿轮箱故障边缘智能诊断方法及应用研究

仪器仪表学报 2024年第1期45卷 70-80页

作者：吴启航丁晓喜何清波黄文彬重庆大学机械与运载工程学院重庆400044 重庆大学高端装备机械传动全国重点实验室重庆400044 上海交通大学机械系统与振动全国重点实验室上海200240

针对齿轮箱运行状态监测数据量大而数据价值密度低导致的数据传输和存储困难、受到带宽影响导致的故障辨识实时性差以及大而深的深度学习模型难以有效部署至边缘端硬件等问题,本文提出了一种基于乘法-卷积网络(MCN)的齿轮箱故障边缘智... 详细信息

针对齿轮箱运行状态监测数据量大而数据价值密度低导致的数据传输和存储困难、受到带宽影响导致的故障辨识实时性差以及大而深的深度学习模型难以有效部署至边缘端硬件等问题,本文提出了一种基于乘法-卷积网络(MCN)的齿轮箱故障边缘智能诊断方法。首先,综合考虑信号滤波在特征表征以及深度学习在特征提取的优势,设计了一种轻量化的MCN模型,同时在嵌入式微处理器搭建了一套端侧边缘智能处理原型与系统。该系统可以直接部署于齿轮箱边缘,通过云服务器训练和更新MCN模型参数并部署至边缘端,于边缘端完成数据采集、处理和故障状态辨识等功能,将大量传感器数据直接消耗在边缘端。实验结果显示MCN具有99.75%的平均识别精度,且部署MCN的齿轮箱故障边缘智能诊断系统可以在0.696 s内准确识别出故障状态。

关键词：齿轮故障诊断边缘计算乘法-卷积深度学习嵌入式系统

性别多样性能否促进创新的社会意义——基于QCA的研究

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科学学与科学技术管理 2022年第7期43卷 62-78页

作者：熊艾伦吴启航陶佳佳重庆工商大学工商管理学院重庆400067 清华大学技术创新研究中心北京100084

当前创新研究的范式已经从“规模与效率”向“价值与意义”转变。关于有意义创新的内涵和定义,学者已经做了翔实的梳理。但探索如何推动“有意义”创新实现的研究还有待进一步丰富。运用定性比较分析(QCA)方法,从整体视角出发探讨了女... 详细信息

当前创新研究的范式已经从“规模与效率”向“价值与意义”转变。关于有意义创新的内涵和定义,学者已经做了翔实的梳理。但探索如何推动“有意义”创新实现的研究还有待进一步丰富。运用定性比较分析(QCA)方法,从整体视角出发探讨了女性科研人员比重是否能够和性别包容、创新应用、互利互惠文化、研发投入一起协同联动实现创新的社会意义。研究结果表明:社会意义创新绩效具有“非对称性”、“多重并行”、“殊方同致”的特点,而友善的研发应用环境和互惠文化氛围是实现高社会意义的创新发展的重要强有力支撑,也会促使女性科研工作者以社会意义创新为导向,实现绿色可持续发展的新创新模式。

关键词：有意义的创新性别多样性环境保护模糊集定性比较分析