检索结果-内蒙古大学图书馆

SSRN 2023年

作者： Liu, Huanying Zeng, Yiwei Chen, Wenwen Liu, Chuanqi Sun, Dezhi Hu, Zhen Li, Pengsong Xu, Haiyu Wu, Hongbin Qiu, Bin Liu, Xinying Dang, Yan Beijing Key Laboratory for Source Control Technology of Water Pollution Engineering Research Center for Water Pollution Source Control and Eco-remediation College of Environmental Science and Engineering Beijing Forestry University Beijing100083 China School of Environmental Science & Engineering Shandong Key Laboratory of Water Pollution Control and Resource Reuse Environment Research Institute Shandong University Qingdao266237 China Technology Co. Ltd Shanghai201800 China

Microbial electrosynthesis (MES) offers a promising approach for converting CO2 into valuable chemicals such as acetate. However, the relative low conversion rate severely limits its practical application. This study investigated the impact of different hydrogen evolution rates on the conversion rate of CO2 to acetate in the MES system. Three potentials (-0.8 V, -0.9 V and -1.0 V) corresponding to various hydrogen evolution rates were set and analyzed, revealing an optimal hydrogen evolution rate, yielding a maximum acetate formation rate of 1410.9 mg/L and 73.5% coulomb efficiency. The electrochemical findings revealed that an optimal hydrogen evolution rate facilitated the formation of an electroactive biofilm. The microbial community of the cathode biofilm highlighted key genera, including Clostridium and Acetobacterium, which played essential roles in electrosynthesis within the MES system. Notably, a low hydrogen evolution rate failed to provide sufficient energy for the electrochemical reduction of CO2 to acetate, while a high rate led to cathode alkalinization, impeding the reaction and causing significant energy wastage. Therefore, maintaining an appropriate hydrogen evolution rate is crucial for the development of mature electroactive biofilms and achieving optimal performance in the MES system. © 2023, The Authors. All rights reserved.

关键词： Carbon dioxide

来源：评论

学校读者我要写书评

暂无评论

Experimental Study on the Behaviour and Deformation Prediction of Underwater Deep Cement Mixing (DCM) Foundation 9th

Experimental Study on the Behaviour and Deformation Predicti...

引用

9th International Conference on Architectural, Civil and Hydraulic engineering, ICACHE 2023

作者： Huang, Ruiyi Tao, Ran Cao, Zhongxin Peng, Yun Department of Marine and Environmental Engineering CCCC 2nd Harbor Engineering Company Ltd National Enterprise Technology Center Wuhan430040 China Department of Science Technology and Digitalization China Communications Construction Company Ltd Beijing100088 China Department of Engineering Zhen Hua Engineering Company Ltd Hong Kong 999077 China State Key Laboratory of Coastal and Offshore Engineering Dalian University of Technology Dalian116023 China

ISBN: (纸本)9789819762378

Based on the marine project of Hong Kong Integrated Waste Management Facilities Phase 1, this paper presents the static loading test of the underwater DCM foundation, and compares the instrumentation monitoring results with the predicted results by finite element analysis. In conclusion, the predicted total DCM compression and settlement is significantly higher than the actual site-measured records. Therefore, the adopted design parameters for the DCM are appropriate and conservatively under-estimate the field strength, which satisfies the requirement as stipulated in the specification. © The Author(s) 2025.

关键词： Geologic models

来源：评论

学校读者我要写书评

暂无评论

Exhaust and Evaporative Volatile Organic Compounds Emissions from Vehicles Fueled with Ethanol-Blended-Gasoline

SSRN

引用

SSRN 2024年

作者： Li, Ruikang Zhong, Chongzhi Xu, Ruiguang Liu, Yan Song, Pengfei Zhang, Taiyu Ning, Yang Mao, Hongjun Tianjin Key Laboratory of Urban Transport Emission Research College of Environmental Science and Engineering Nankai University Tianjin300071 China China Automotive Technology & Research Center Co. Ltd Tianjin300071 China Tianjin Eco-Environmental Monitoring Center Tianjin300192 China Hebei University of Engineering Handan056009 China

By 2020, China has implemented the use of 10% ethanol-blended-gasoline (E10), which is expected to notably impact vehicular volatile organic compounds (VOCs) emissions. The adoption of E10 reduced certain emissions but raised concerns with about more reactive oxygenated volatile organic compounds (OVOCs). This study aimed to evaluate the impact of E10 on the total VOCs emissions from both exhaust and evaporative emissions by conducting tests on CHINA V and VI light-duty gasoline vehicles (LDGVs) using 0% ethanol blended gasoline (E0) and E10. E10 reduces VOCs emissions in the exhaust, as evidenced by the lower emission factors (EFs) in CHINA V and VI vehicles. Evaporative emissions showed differences in emitted VOCs, with lower EFs for CHINA V vehicles fueled with E10. The CHINA VI vehicles also exhibited reduced EFs. These findings highlight the environmental benefits of E10 in CHINA VI-compliant LDGVs;however, the effectiveness of earlier CHINA V standard vehicles requires further evaluation. © 2024, The Authors. All rights reserved.

关键词： Volatile organic compounds

来源：评论

学校读者我要写书评

暂无评论

Mixed Matrix Membrane for Enhanced Ethanol/Water Pervaporation Separation by Incorporation of Hydrophilic Zr-Mof Nu-906 in Chitosan

SSRN

引用

SSRN 2023年

作者： Fu, Huayan Luo, Ruiwen Liu, Panpan Yu, Shuning Xing, Qinglei Bai, Peng Guo, Xianghai Lyu, Jiafei Department of Pharmaceutical Engineering School of Chemical Engineering and Technology Tianjin University Tianjin300350 China Tianjin University Tianjin China Tianjin Key Laboratory for Marine Environmental Research and Service School of Marine Science and Technology Tianjin University Tianjin300072 China Key Laboratory of Ocean Observation Technology of Ministry of Natural Resources School of Marine Science and Technology Tianjin University Tianjin300072 China

Achieving simultaneously enhanced selectivity and permeability is crucial to efficient ethanol pervaporation dehydration for biofuel purification. The sophisticated metal-organic frameworks (MOFs) have proven their potential as membrane fillers despite of the limited research on few frameworks. Herein, by incorporating hydrophilic microporous zirconium-based NU-906 nanoparticles into chitosan (CS), dense and uniform NU-906/CS mixed matrix membranes (MMM) were fabricated for alcohol pervaporation dehydration. The introduction of NU-906 brought excellent water affinity and structural stability to the hybrid membranes confirmed by the water contact angle and swelling resistance tests. Benefiting from the hydrophilicity and the ordered porosity of incorporated NU-906, simultaneously enhanced ethanol-water selectivity and water permeability have been achieved on the hybrid membranes where the membrane with 5.0 wt% NU-906 exhibited a high flux of 1086 g/(m2·h) and excellent separation factor of 2651 for 90 wt% ethanol dehydration at 76 ℃ and maintained stable performance within 100 h. This research has widened the species of MOF for the fabrication of MMMs and provided new options for organic solvent pervaporation dehydration. © 2023, The Authors. All rights reserved.

关键词： Chitosan

来源：评论

学校读者我要写书评

暂无评论

Machine Learning-Assisted to Study the Effect of N:P Ratio on Algae Growth to Forecasting the Bloom with Dielectric Spectroscopy Technique

SSRN

引用

SSRN 2023年

作者： Wang, Shuhang Bingke, Yang Qu, Yihe Zhang, Dayong Chen, Junyi Russel, Mohammad Biswas, Kishore National Engineering Laboratory for Lake Pollution Control and Ecological Restoration Chinese Research Academy of Environmental Beijing100012 China School of Ocean Science and Technology Key laboratory of Industrial Ecology and Environmental Engineering Ministry of Education Dalian University of Technology Panjin124221 China Artificial Intelligence–Natural Language Processing School of Informatics Peking University Beijing100085 China

Real-time online monitoring of algal biomass has emerged as a significant challenge in contemporary marine and freshwater environmental conservation efforts aimed at safeguarding the aquatic ecosystem. Given the pivotal role that algae play in maintaining a delicate balance of nutrients and other environmental factors, the application of a machine learning-assisted dielectric spectroscopy approach represents a novel and intelligent technique for mitigating the current challenges associated with monitoring algal *** work optimized a machine learning -assisted real-time dielectric spectroscopy approach to study the effect of N:P ratios on Desmodesmus sp. growth to forecasting the blooming. As a primary feature, various N:P concentrations (1:1, 2:1, 3:1, 1:2, and 1:3) were utilized to characterize and compare the dielectric (S11(dB) & Ε'') and conventional UV-vis spectroscopy properties (OD686 & Chl-a). The dielectric measurements of S11(dB) & Ε'' are consistent with the OD686 & Chl-a value. Highest Desmodesmus sp. OD686 0.87,0.76 recorded at N:P 3:1,2:1 ratio respectively. The machine learning based PCA and linear regression model were applied and found at 0-8 days incubation time Desmodesmus sp. growth biomass negatively corelated with S11(dB) & Ε" and positively correlatedly with OD686 & Chl-a respectively, where R2 values >0.95. While the measured Ε"& S11(dB) -7.956 &-0.6775, the linear regression model was applied to predicted and forecasting OD686 for 8days and 20days was 0.817, 0.716;2.136,1.926 respectively, at the ratios N:P (3:1) and RMES value were 0.0047 & 0.0319. This analysis revealed that the machine learning- assisted model has high accuracy. Thus, Machine learning-assisted dielectric spectroscopy method could be the potential tools to real-time monitoring the algal cell biomass or forecasting the blooming to control the N:P ratios to protect the aquatic ecosystem. © 2023, The Authors. All rights reserved.

关键词： Forecasting

来源：评论

学校读者我要写书评

暂无评论

Beneficial effects of AMP Scy-hepc on the gut microbiota contribute to the potential growth of Larimichthys crocea

引用

Blue Biotechnology 2024年第1期1卷 1-15页

作者： Sun, Hang Chen, Fangyi Hao, Hua Xiong, Ming Peng, Hui An, Zhe Wang, Ke-Jian State Key Laboratory of Marine Environmental Science College of Ocean and Earth Sciences Xiamen University Xiamen China State-Province Joint Engineering Laboratory of Marine Bioproducts and Technology College of Ocean and Earth Sciences Xiamen University Xiamen China Fujian Innovation Research Institute for Marine Biological Antimicrobial Peptide Industrial Technology College of Ocean and Earth Sciences Xiamen University Xiamen China

In light of the global ban on antibiotics in animal feed, antimicrobial peptides (AMPs) have emerged as a compelling substitute, garnering considerable interest for their potential as feed additives. Our previous study revealed that the extended (one-year) daily administration of the AMP Scy-hepc substantially boosted the growth of Larimichthys crocea. However, the exact influence of dietary supplementation with AMPs on the gut microbiota and the potential beneficial mechanisms remain unclear. Inspired by this, the present study endeavors to examine the alterations in gut microbiota at various gut sites in L. crocea following a 60-day Scy-hepc feeding regimen, building upon our prior research efforts. Utilizing 16S rRNA sequencing, we found that dietary supplementation with Scy-hepc significantly promoted the growth of L. crocea, which may be caused by the remarkable changes in the microbial communities within the foregut and midgut. Notable changes were observed in Tenericutes, Firmicutes, Proteobacteria, Cyanobacteria and Spirochaetes. The bacterial load trends in both the foregut and midgut demonstrated a notable increase following a 60-day Scy-hepc feeding, as determined by absolute quantitative PCR analysis. Moreover, Scy-hepc supplementation increased the abundance of potential probiotics (Rhodobiaceae and Planococcaceae) and reduced the abundance of opportunistic pathogens (Flavobacteriia and Mollicutes). This led to a more intricate microbial network with enhanced metabolism-related functions, especially in lipid transport and metabolism, signal transduction mechanisms, and coenzyme transport and metabolism. And the microbial resistance (Rs) exhibits no significant change between the Scy-hepc and control groups, indicating a minimal level of toxicity to the gut microbiota of L. crocea. In summary, this study provides compelling evidences supporting the beneficial alteration of gut microbiota in the foregut and midgut as an underlying mechanism by which Scy-h

关键词：

来源：评论

学校读者我要写书评

暂无评论

Rationally Reconstructing Attapulgite to Mcm-41 and its Superior Application in Formaldehyde Degradation

SSRN

引用

SSRN 2024年

作者： Chen, Dan Zhang, Jing Zhai, Ming Chen, Xin Miao, Liqi Wang, Zhong Wang, Xiaozhi College of Environmental Science and Engineering Yangzhou University Yangzhou225127 China School of Chemistry and Chemical Engineering Yangzhou University Yangzhou225002 China Key Laboratory of Biofuels Qingdao Institute of Bioenergy and Bioprocess Technology Chinese Academy of Sciences Qingdao266101 China

The inferior reactive metal dispersion caused by lack of structural defects limits the application of MCM-41 in synthesizing effective catalysts. Herein, we substituted conventional silicon source (CTAB) with attapulgite to fabricate structural defects on MCM-41. After Ag incorporation, catalytic performance tests proved this substitution favors HCHO degradation. Due to high structural stability, attapulgite rods can only merge with each other during MCM-41 construction, resulting sheet-like morphology without formation of mesoporous structure. The metal species (Al, Mg and Fe) in attapulgite improves the dispersion and size distribution of Ag nanoparticles, as well intensifies electron properties of Ag species. As for MCM-41 prepared with acidified attapulgite, the demetalization resulted in the exposure of Si-O- groups and decrease in structural stability. In subsequent MCM-41 construction, acidified attapulgite collapse into colloid particles and debris. Colloid particles would be drawn together by CTA+, leading to the formation of chrysalis-like particles with regular mesopores. Debris would also surround CTA+ and further collapse, forming cotton-like morphology with irregular mesopores. The reservation of Si-O- groups after MCM-41 construction can enhance the exposure of oxygen species and dispersion of Ag nanoparticles on both outer surface and inner mesopores. Besides, such Si-O- groups are adsorptive and reactive to HCHO. © 2024, The Authors. All rights reserved.

关键词： Formaldehyde

来源：评论

学校读者我要写书评

暂无评论

Molecular dynamics simulation on oxidation process and interfacial performance of foamed asphalt binders based on ReaxFF force field

引用

Proceedings of the Royal Society A: Mathematical, Physical and engineering sciences 2025年第2309期481卷

作者： Yao, Hui Liu, Junfu Zeng, Jiani You, Zhanping Wang, Dawei Beijing Key Laboratory of Traffic Engineering Faculty of Architecture Civil and Transportation Engineering Beijing University of Technology No. 100 Pingleyuan Chaoyang Beijing100124 China School of Transportation Science and Engineering Harbin Institute of Technology Harbin150006 China Department of Civil and Environmental Engineering Michigan Technological University 1400 Townsend Drive HoughtonMI49931-1295 United States European Research Center for Advanced Transportation Infrastructure Technology Mies-van-der-Rohe-Straße 1 Aachen52074 Germany

Asphalt can deteriorate and age due to exposure to environmental conditions. This ageing reduces pavement performance and recycling waste pavement is relevant for environmental protection. The oxidation process, properties and interfacial behaviour of asphalt binders and foamed asphalt binders were discussed with the classical molecular dynamics (MD) simulation and reactive force field molecular dynamics (ReaxFF MD) simulation, as well as mineral aggregate molecular systems. The oxidized models for each asphalt molecule were proposed, which closely matched actual experimental study results. The simulation results showed that sulfur atoms oxidized the fastest, followed by benzyl carbon. As the degree of oxidation increased, the viscosity and glass transition temperature of asphalt molecules also increased. The interfacial energies of various systems were analysed, such as foamed asphalt-aged asphalt, asphalt-aggregate and asphalt-recycled aggregate. It was found that the adhesion of asphalt-aged asphalt decreased due to the presence of water, but this phenomenon was not observed in the asphalt-recycled aggregate interface when the water content was less than 2%. The mean square displacement results showed that 3% or less water content facilitated the diffusion and movement of molecules in asphalt-recycled aggregate systems, whereas, in asphalt-aggregate systems, only 1% water content was sufficient. © 2025 The Author(s).

关键词： Aggregates

来源：评论

学校读者我要写书评

暂无评论

Incorporation of fluoride in calcite: Insights from solid-state NMR, NanoSIMS, APT, HRSTEM and DFT calculations

引用

Geochimica et Cosmochimica Acta 2025年 401卷 31-46页

作者： Li, Wei Ren, Chao Kwon, Kideok D. Feng, Xiaolei Sha, Gang Li, Jinhui Dong, Sijia Lu, Xiancai Key Laboratory of Surficial Geochemistry Ministry of Education School of Earth Sciences and Engineering Nanjing University Nanjing 210023 China Frontiers Science Center for Critical Earth Material Cycling (FSC-CEMaC) Nanjing University Nanjing 210023 China School of Environmental and Biological Engineering Nanjing University of Science and Technology Nanjing 210094 China Department of Geology Kangwon National University Chuncheon 24347 South Korea School of Materials Science and Engineering Nanyang Technological University 50 Nanyang Avenue Singapore 639798 Singapore School of Materials Science and Engineering/Herbert Gleiter Institute of Nanoscience Nanjing University of Science and Technology Nanjing 210094 China School of Sustainable Energy and Resources Nanjing University Suzhou 215163 China

Despite the abundant occurrence and large variation in fluorine (F) in calcium carbonate minerals in geological settings, it remains poorly understood to what degree F can be incorporated into calcium carbonate minerals. Particularly, molecular-scale evidence for F incorporation modes in the calcite structure is lacking. In this study, we conducted coprecipitation experiments for F with calcium carbonate to reveal the nature of F partitioning in calcite minerals. The ¹⁹F solid-state NMR spectra yield four peaks at −82, −97, −107 and −108 ppm, suggesting that F can be taken up by calcite via at least four mechanisms. The −108 ppm peak occurs at F⁻ concentrations above 2 mM and is consistent with fluorite (CaF2), suggesting that fluorite precipitation predominates at high [F]. Combined with ¹⁹F chemical shifts, ¹⁹F{¹³C} rotational echo double resonance (REDOR) techniques, and DFT-based quantum computations, the ¹⁹F NMR signals at −82, −97 and −107 ppm are assigned to surface adsorbed species, surface incorporated “CaF2” defects and incorporated “CaF2” defects within the bulk of calcite, respectively. Visualization via three-dimensional atomic probe topography (3D APT), high-resolution scanning transmission microscopy (HRSTEM) and nanoscale secondary ion mass spectrometry (NanoSIMS) analysis further supported that F can be incorporated into the bulk structure of calcite. These findings provide atomic and molecular insight into F incorporation in carbonate minerals and are helpful for the application of carbonate materials as potential geochemical proxies.

关键词： APT Calcite Fluoride HRSTEM Incorporation NanoSIMS Solid-state NMR

来源：评论

学校读者我要写书评

暂无评论

3-Aminopropyltriethoxysilane (Aptes) Silanization Onto Polyamide Layer for Efficient Dye-Salt Separation

SSRN

引用

SSRN 2022年

作者： Li, Jian Xiao, Pei Yu, Jie Li, Lei Zhang, Yiyun Ma, Yun Liu, Fei Laboratory of Environmental Biotechnology School of Environmental and Civil Engineering Jiangnan University Wuxi214122 China Zhejiang University of Technology United States State Key Laboratory of Food Science and Technology School of Food Science and Technology International Joint Laboratory on Food Safety Jiangnan University Wuxi214122 China School of Food Science and Technology State Key Laboratory of Food Science and Technology Jiangnan University Wuxi214122 China

Improving the separation efficiency of nanofiltration (NF) membrane is considered as a major ambition to treat dyeing wastewater. Here, a facile post-treatment technology was applied to decorate the thin-film composite (TFC) NF membranes by grafting 3-aminopropyltriethoxysilane (APTES) molecules on the surface of the selective polyamide (PA) skin layer. After modification, a loose and smooth silane layer was decorated on the TFC membrane surface due to the condensation reaction, which endowed the obtained membrane an enhanced hydrophilic surface. Comparatively, APTES post-treated TFC membrane achieved a pure water flux up to 44.8 L m-2 h-1 bar-1, which was 4.7 times higher than that of the TFC-0 membrane. Meantime, the TFC-4 membrane maintained high rejections towards congo red, reactive blue-19, coomassie blue G-250 and methyl blue (> 99.0%). Further characterizations identified that the grafting of APTES on PA layer was mainly due to the amidation and condensation reaction. The results provided in this work demonstrated that post-treatment of PA-based NF membrane by utilizing the residual acyl chloride could be an efficient and easy strategy to tune the separation performance of the TFC membranes. © 2022, The Authors. All rights reserved.

关键词： Nanofiltration

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：