检索结果-内蒙古大学图书馆

Overview of enhancing biological treatment of coal chemical wastewater:New strategies and future directions

Journal of environmental Sciences 2024年第1期135卷 506-520页

作者： Weiwei Ma Xiaoqi Zhang Hongjun Han Xueqing Shi Qiaoping Kong Tong Yu Fei Zhao School of Environmental and Municipal Engineering Qingdao University of TechnologyQingdao 266520China State Key Laboratory of Urban Water Resource and Environment Harbin Institute of TechnologyHarbin 150090China

Coal chemical wastewater(CCW)is a type of refractory industrial wastewater,and its treatment has become the main bottleneck restricting the sustainable development of novel coal chemical *** treatment is considered as an economical,effective and environmentally friendly technology for CCW ***,conventional biological process is difficult to achieve the efficient removal of refractory organics because of CCW with the characteristics of composition complexity and high ***,seeking the novel enhancement strategy appears to be a favorable solution for enhancing biological treatment efficiency of *** review focuses on presenting a comprehensive picture about the exogenous enhancement strategies for CCW biological *** performance and potential application of exogenous enhancement strategies,including co-metabolic substrate enhancement,biofilm filler enhancement,adsorption material enhancement and conductive mediator enhancement,were ***,the enhancing mechanisms of different strategies were comprehensively discussed from a biological ***,the prospects of enhancement strategies based on the engineering performance,economic cost and environmental impact(3E)evaluation were *** novel enhancement strategy based on“low carbon emissions”,“resource recycling”and“water environment security”in the context of carbon neutrality was *** together,this review provides technical reference and new direction to facilitate the regulation and optimization of typical industrial wastewater biological treatment.

关键词： Coal chemical wastewater Biological treatment Exogenous enhancement Refractory organics 3E evaluation

来源：评论

学校读者我要写书评

暂无评论

Nitrite-driven anaerobic ethane oxidation

引用

environmental Science and Ecotechnology 2024年第5期21卷 361-368页

作者： Cheng-Cheng Dang Yin-Zhu Jin Xin Tan Wen-Bo Nie Yang Lu Bing-Feng Liu De-Feng Xing Nan-Qi Ren Guo-Jun Xie State Key Laboratory of Urban Water Resource and Environment School of EnvironmentHarbin Institute of TechnologyHarbin150090China Key Laboratory of the Three Gorges Region's Eco-Environment Ministry of EducationCollege of Environment and EcologyChongqing UniversityChongqing400044China Water Innovation and Smart Environment Laboratory School of Civil and Environmental EngineeringFaculty of EngineeringQueensland University of TechnologyBrisbaneQueensland4001Australia

Ethane,the second most abundant gaseous hydrocarbon in vast anoxic environments,is an overlooked greenhouse *** anaerobic oxidation of ethane can be driven by available electron acceptors such as sulfate and ***,despite nitrite being a more thermodynamically feasible electron acceptor than sulfate or nitrate,little is known about nitrite-driven anaerobic ethane *** this study,a microbial culture capable of nitrite-driven anaerobic ethane oxidation was enriched through the long-term operation of a nitrite-and-ethane-fed *** continuous operation,the nitrite removal rate and the theoretical ethane oxidation rate remained stable at approximately 25.0 mg NO_(2) eN L^(-1) d^(-1) and 11.48 mg C2H6 L^(-1) d^(-1),*** tests demonstrated that ethane is essential for nitrite removal in this microbial *** function analysis revealed that a species affiliated with a novel genus within the family Rhodocyclaceae,designated as'Candidatus Alkanivoras nitrosoreducens',may perform the nitrite-driven anaerobic ethane *** the proposed metabolic model,despite the absence of known genes for ethane conversion to ethyl-succinate and succinate-CoA ligase,'***'encodes a prospective fumarate addition pathway for anaerobic ethane oxidation and a complete denitrification pathway for nitrite reduction to *** findings advance our understanding of nitrite-driven anaerobic ethane oxidation,highlighting the previously overlooked impact of anaerobic ethane oxidation in natural ecosystems.

关键词： Anaerobic ethane oxidation Denitrification Microbial culture Fumarate addition pathway Greenhouse gas

来源：评论

学校读者我要写书评

暂无评论

High-precision numerical modeling of the pro jectile launch and failure mechanism analysis of pro jectile-borne components

引用

Applied Mathematics and Mechanics(English Edition) 2025年第5期46卷 885-906页

作者： Xindan GUO Qiming LIU Xu HAN Tao LI Bin’an JIANG Canwei CAI State Key Laboratory of Advanced Design and Manufacturing Technology for Vehicle College of Mechanical and Vehicle EngineeringHunan UniversityChangsha 410082China State Key Laboratory of Reliability and Intelligence of Electrical Equipment School of Mechanical EngineeringHebei University of TechnologyTianjin 300401China Artillery Ammunition Technology Laboratory PLA Army Academy of Artillery and Air DefenseHefei 230031China

As core components of precision-guided projectiles,projectile-borne components are highly susceptible to failure or even damage in complex high-overload environments,thereby significantly compromising launch reliability and ***,accurately characterizing the mechanical behavior of propellants remains challenging due to the limitations in the current internal ballistic theory and the constraints of large-scale artillery firing *** complicates the high-precision numerical modeling of projectile launch,and obstructs investigations into the failure mechanisms of projectile-borne ***,this paper identifies propellant parameters using the computational inverse method under uncertainty,further establishes high-precision numerical models of projectile launch,and explores the failure mechanisms of projectile-borne components in complex high-overload ***,a projectile launching experiment is meticulously designed and executed to obtain the breech pressure and muzzle ***,a general simulation model is built,and the powder burn model is used to simulate the ignition and ***,the propellant parameters are effectively identified with the computational inverse method by the combination of the experiments and simulations.A high-precision numerical model of projectile launch is modified with the parameters validated by another experiment,and the high-overload characteristics during projectile launch are thoroughly analyzed based on this ***,the high-overload characteristics of projectile-borne components are analyzed to elucidate the stress variation laws and to reveal the failure mechanisms influenced by time and spatial *** research provides an effective method for perfectly identifying propellant parameters and building high-precision numerical models of projectile ***,it provides significant guidance for the anti-high overload design and analysis of projectile-bo

关键词： projectile-borne component high-overload environment propellant parameter identification computational inverse technique failure mechanism

来源：评论

学校读者我要写书评

暂无评论

Biotoxicity dynamic change and key toxic organics identification of coal chemical wastewater along a novel full-scale treatment process

引用

Journal of environmental Sciences 2024年第4期138卷 277-287页

It is particularly important to comprehensively assess the biotoxicity variation of industrial wastewater along the treatment process for ensuring the water environment ***,intensive studies on the biotoxicity reduction of industrial wastewater are still *** this study,the toxic organics removal and biotoxicity reduction of coal chemical wastewater(CCW)along a novel full-scale treatment process based on the pretreatment process-anaerobic process-biological enhanced(BE)process-anoxic/oxic(A/O)process-advanced treatment process was *** process performed great removal efficiency of COD,total phenol,NH_(4)^(+)-N and total *** the biotoxicity variation along the treatment units was analyzed from the perspective of acute biotoxicity,genotixicity and oxidative *** results indicated that the effluent of pretreatment process presented relatively high acute biotoxicity to Tetrahymena *** the acute biotoxicity was significantly reduced in BE-A/O *** the genotoxicity and oxidative damage to Tetrahymena thermophila were significantly decreased after advanced *** polar organics in CCW were identified as the main biotoxicity *** were positively correlated with acute biotoxicity,while the nitrogenous heterocyclic compounds and polycyclic aromatic hydrocarbons were positively correlated with *** the biotoxicity was effectively reduced in the novel full-scale treatment process,the effluent still performed potential biotoxicity,which need to be further explored in order to reduce environmental risk.

关键词： Acute biotoxicity Genotoxicity Oxidative damage Toxic organics Coal chemical wastewater Novel full-scale treatment process

来源：评论

学校读者我要写书评

暂无评论

Reaction intermediates and products characterisation of NH_(3) in desulphurisation with activated coke

引用

Journal of Iron and Steel Research International 2024年第11期31卷 2664-2674页

作者： Wei-li Zhang Meng Wang Wen-zhe Si Jun-hua Li School of Environment Tsinghua UniversityBeijing100084China State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical TechnologyBeijing100029China

The sulphate is an important factor restricting the efficient and stable operation of the activated coke (AC) flue gas purification system. The simulation experiments and in situ infrared tests of AC taken from desorption tower of the AC flue gas purification system were carried out to first calibrate the thermal desorption characteristics of adsorbed NH_(3) and sulphate and explore the reaction behaviour of NH_(3) with SO_(2) and H_(2)SO_(4). On this basis, some advice for optimising the sulphate generation was put forward to improve the purification efficiency of the AC system. The results show that the temperatures of the desorption of adsorbed NH_(3), the decomposition of (NH_(4))_(2)SO_(4) and NH_(4)HSO_(4) are 224, 276 and 319 ℃, respectively, which lays the foundation for the quantitative analysis of sulphate on AC. Regardless of the NH_(3) amount, only a small portion of H_(2)SO_(4) is converted to sulphate, as the H_(2)SO_(4) deposited in AC pores or agglomerated together could not come into contact with NH_(3). The final reaction product of NH_(3) and SO_(2) is mainly (NH_(4))_(2)SO_(4) which is continuously generated because the newly generated H_(2)SO_(4) is continually exposed to NH_(3), if NH_(3) is enough. The reaction of NH_(3) with H_(2)SO_(4) takes precedence over with NH_(4)HSO_(4). In the initial stages in which H_(2)SO_(4) is exposed to NH_(3), the product is essentially all NH_(4)HSO_(4) as intermediate. Then, it is further converted to (NH_(4))_(2)SO_(4) whose amount reaches equilibrium when the accessible H_(2)SO_(4) is exhausted. All the NH_(3) adsorbed on AC entering the desulphurisation tower generates NH_(4)HSO_(4), but the amount is limited. The remaining SO_(2) entering the denitrification tower mainly generates (NH_(4))_(2)SO_(4);thus, limiting the remaining SO_(2) amount is necessary to guarantee denitrification efficiency. When the NH_(3) injection is changed to the desulphurisation tower, the initial NH_(3) injection rate can be inc

关键词： Sulphate generation Activated coke Sintering flue gas treatment NH_(4)HSO_(4) (NH_(4))_(2)SO_(4)

来源：评论

学校读者我要写书评

暂无评论

Multimodal Machine Learning Guides Low Carbon Aeration Strategies in Urban Wastewater Treatment

引用

engineering 2024年第5期36卷 51-62页

作者： Hong-Cheng Wang Yu-Qi Wang Xu Wang Wan-Xin Yin Ting-Chao Yu Chen-Hao Xue Ai-Jie Wang State Key Laboratory of Urban Water Resource and Environment School of Civil and Environmental EngineeringHarbin Institute of Technology(Shenzhen)Shenzhen 518055China Key Laboratory of Drinking Water Safety and Distribution Technology of Zhejiang Province College of Civil Engineering and ArchitectureZhejiang UniversityHangzhou 310058China

The potential for reducing greenhouse gas(GHG)emissions and energy consumption in wastewater treatment can be realized through intelligent control,with machine learning(ML)and multimodality emerging as a promising ***,we introduce an ML technique based on multimodal strategies,focusing specifically on intelligent aeration control in wastewater treatment plants(WWTPs).The generalization of the multimodal strategy is demonstrated on eight ML *** results demonstrate that this multimodal strategy significantly enhances model indicators for ML in environmental science and the efficiency of aeration control,exhibiting exceptional performance and *** random forest with visual models achieves the highest accuracy in forecasting aeration quantity in multimodal models,with a mean absolute percentage error of 4.4%and a coefficient of determination of *** testing in a full-scale plant reveals that the multimodal model can reduce operation costs by 19.8%compared to traditional fuzzy control *** potential application of these strategies in critical water science domains is *** foster accessibility and promote widespread adoption,the multimodal ML models are freely available on GitHub,thereby eliminating technical barriers and encouraging the application of artificial intelligence in urban wastewater treatment.

关键词： Wastewater treatment Multimodal machine learning Deep learning Aeration control Interpretable machine learning

来源：评论

学校读者我要写书评

暂无评论

Experimental Study on Multi-stress Failure Characteristics of Space Station Power Tools Motor 14

Experimental Study on Multi-stress Failure Characteristics o...

引用

14th IEEE Global reliability and Prognostics and Health Management Conference, PHM-Hangzhou 2023

作者： Zhang, Zhaolin Huang, Shouqing Li, Fangyong Wang, Hao Yan, Qi Hu, Qi Yang, Yong Beijing Key Laboratory of Environment & Reliability Test Technology for Aerospace Mechanical & Electrical Products Beijing Institute of Spacecraft Environment Engineering Beijing China

ISBN: (纸本)9798350301359

As the Chinese space station continues its operations in orbit, The Extra-Vehicular Activity (EVA) power tools are increasingly facing a variety of complex working conditions when normalizing extravehicular operations. To gain a better understanding of the performance of EVA power tools in extravehicular operations, this study focuses on the motor components and designs an experimental system for multi-stress pulling offset. The system aims to investigate the impact of extreme conditions such as high/low temperatures, heavy loads, and high speeds in a vacuum environment on the working performance of motor components. The results indicate that increasing the set speed slightly enhances the output torque of motor components, while also significantly increasing torque fluctuations. Moreover, the operating temperature of motor components shows no strong correlation with stalling torque values. This experiment can be flexibly applied to various aerospace rotating products, providing valuable data support for future product design and improvement. © 2023 IEEE.

关键词： EVA power tools experimental design motor components multi-stress

来源：评论

学校读者我要写书评

暂无评论

Cooperative effect of Cr and Al elements on passivation enhancement of eutectic high-entropy alloy AlCoCrFeNi_(2.1)with precipitates

引用

Journal of Materials Science & technology 2023年第5期136卷 97-108页

作者： Xiaotian Duan Tiezhuang Han Xiao Guan Yuning Wang Huhu Su Kaisheng Ming Jing Wang Shijian Zheng State Key Laboratory of Reliability and Intelligence of Electrical Equipment Hebei University of TechnologyTianjin 300130China School of Material Science and Engineering Hebei University of TechnologyTianjin 300130China

In conventional corrosion-resistant alloys,precipitation usually reduces corrosion resistance severely by weakening passive films *** this work,we found that the aging-treated AlCoCrFeNi_(2.1)sam-ples,which have abundant nanosized L 12 and body-centered cubic(BCC)precipitates in the lamellar face-centered cubic(FCC)and B2 phases,displayed better corrosion resistance than solution-treated AlCoCrFeNi_(2.1)samples without *** the AlCoCrFeNi_(2.1)alloy,the FCC phase with L1_(2)precipi-tates and the B2 phase with BCC precipitates were protected by passive films enriched with Cr and Al elements,***,the Al-rich passive film of the B2 phase was less stable than the Cr-rich passive film of the FCC phase,so B2 phase dissolved *** Cr-rich passive film of the FCC phase remained stable with the formation of Al-rich L1_(2)precipitates inside the phase because those precipitates with the size of∼5 nm were too small to affect the composition of the Cr-rich passive *** formation of Cr-rich BCC precipitates within the B2 phase increased the content of the Al element inside the phase,improving the stability of Al-rich passive film on the B2 ***,BCC precip-itates with the size of∼30 nm were protected by Cr-rich passive film,which could inhibit the expansion of corrosion ***,the corrosion resistance of eutectic high-entropy alloy AlCoCrFeN 2.1 was unprece-dentedly enhanced by the precipitation of BCC *** study could provide an attractive strategy for designing high-entropy alloys with excellent corrosion resistance and high strength.

关键词： Eutectic high-entropy alloy Passive film Corrosion resistance Precipitates TEM

来源：评论

学校读者我要写书评

暂无评论

Nonmetallic modified zero-valent iron for remediating halogenated organic compounds and heavy metals: A comprehensive review

引用

environmental Science and Ecotechnology 2024年第5期21卷 34-46页

作者： Zimin Yan Jia Ouyang Bin Wu Chenchen Liu Hongcheng Wang Aijie Wang Zhiling Li State Key Laboratory of Urban Water Resource and Environment School of EnvironmentHarbin Institute of TechnologyHarbin150090PR China State Key Laboratory of Urban Water Resource and Environment School of Civil and Environmental EngineeringHarbin Institute of Technology ShenzhenShenzhen518055PR China

Zero-valent iron(ZVI),an ideal reductant treating persistent pollutants,is hampered by issues like corrosion,passivation,and suboptimal *** advancements in nonmetallic modified ZVI(NM-ZVI)show promising potential in circumventing these challenges by modifying ZVI's surface and internal physicochemical *** its promise,a thorough synthesis of research advancements in this domain remains *** we review the innovative methodologies,regulatory principles,and reduction-centric mechanisms underpinning NM-ZVI's effectiveness against two prevalent persistent pollutants:halogenated organic compounds and heavy *** start by evaluating different nonmetallic modification techniques,such as liquid-phase reduction,mechanical ball milling,and pyrolysis,and their respective *** discussion progresses towards a critical analysis of current strategies and mechanisms used for NM-ZVI to enhance its reactivity,electron selectivity,and electron utilization *** is achieved by optimizing the elemental compositions,content ratios,lattice constants,hydrophobicity,and ***,we propose novel approaches for augmenting NM-ZVI's capability to address complex pollution *** review highlights NM-ZVI's potential as an alternative to remediate water environments contaminated with halogenated organic compounds or heavy metals,contributing to the broader discourse on green remediation technologies.

关键词： Nonmetallic modified zero-valent iron Halogenated organic compounds Heavy metals Reductive removal Regulation strategies Electron selectivity

来源：评论

学校读者我要写书评

暂无评论

Bimetallic CoNi single atoms supported on three-dimensionally ordered mesoporous chromia:highly active catalysts for n-hexane combustion

引用

Green Energy & environment 2024年第7期9卷 1122-1137页

作者： Xiuqing Hao Yuxi Liu Jiguang Deng Lin Jing Jia Wang Wenbo Pei Hongxing Dai Beijing Key Laboratory for Green Catalysis and Separation Key Laboratory of Beijing on Regional Air Pollution ControlKey Laboratory of Advanced Functional MaterialsEducation Ministry of ChinaLaboratory of Catalysis Chemistry and NanoscienceDepartment of Chemical EngineeringFaculty of Environment and LifeBeijing University of TechnologyBeijing100124China

Developing the alternative supported noble metal catalysts with low cost,high catalytic efficiency,and good resistance toward carbon dioxide and water vapor is critically demanded for the oxidative removal of volatile organic compounds(VOCs).In this work,we prepared the mesoporous chromia-supported bimetallic Co and Ni single-atom(Co_(1)Ni_(1)/meso-Cr_(2)O_(3))and bimetallic Co and Ni nanoparticle(Co_(NP)Ni_(NP)/mesoCr_(2)O_(3))catalysts adopting the one-pot polyvinyl pyrrolidone(PVP)-and polyvinyl alcohol(PVA)-protecting approaches,*** results indicate that the Co_(1)Ni_(1)/meso-Cr_(2)O_(3)catalyst exhibited the best catalytic activity for n-hexane(C_(6)H_(14))combustion(T_(50%)and T_(90%)were 239 and 263℃ at a space velocity of 40,000 mL g^(-1)h^(-1);apparent activation energy and specific reaction rate at 260℃ were 54.7 kJ mol^(-1)and 4.3×10^(-7)mol g^(-1)_(cat)s^(-1),respectively),which was associated with its higher(Cr^(5+)+Cr^(6+))amount,large n-hexane adsorption capacity,and good lattice oxygen mobility that could enhance the deep oxidation of n-hexane,in which Ni_(1) was beneficial for the enhancements in surface lattice oxygen mobility and low-temperature reducibility,while Co_(1) preferred to generate higher contents of the high-valence states of chromium and surface oxygen species as well as adsorption and activation of n-hexane.n-Hexane combustion takes place via the Mars van Krevelen(MvK)mechanism,and its reaction pathways are as follows:n-hexane→olefins or 3-hexyl hydroperoxide→3-hexanone,2-hexanone or 2,5-dimethyltetrahydrofuran→2-methyloxirane or 2-ethyl-oxetane→acrylic acid→CO_x→CO_(2)and H_(2)O.

关键词： Three-dimensional ordered mesoporous chromium oxide Supported bimetallic single-atom catalyst Cobalt-nickel single atoms n-Hexane combustion Catalytic reaction mechanism

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：