检索结果-内蒙古大学图书馆

High-Efficiency Capture of Ammonia Using Hierarchically Porous Zr-Mof Nanoarchitectures Under Ambient Conditions: Thermodynamics, Kinetics, and Mechanisms

学校读者我要写书评

暂无评论

SSRN 2022年

作者： Wang, Xinbo Liu, Zhilu Li, Ganggang Jiang, Guoxia Zhao, Yue Li, Li Li, Kai Liang, Guojie Gao, Song Xi, Hailing Li, Song Zou, Ruqiang State Key Laboratory of NBC Protection for Civilian Research Institute of Chemical Defense Beijing100191 China State Key Laboratory of Coal Combustion School of Energy and Power Engineering Huazhong University of Science and Technology Wuhan430074 China National Engineering Laboratory for VOCs pollution Control Material & Technology Research Center for Environmental Material and Pollution Control Technology University of Chinese Academy of Sciences Beijing101408 China Beijing Key Laboratory for Theory and Technology of Advanced Battery Materials School of Materials Science and Engineering Institute of Clean Energy Peking University Beijing100871 China

Zirconium-based metal–organic frameworks (Zr-MOFs) have emerged as a promising candidate for efficiently eliminating toxic chemicals under ambient conditions. Herein, we demonstrate the remarkable ammonia capture capabilities of the hierarchically porous MOF-808 xerogel (G808) macrostructure and its amino-functionalized analogue (G808-NH2), which were constructed through a sol–gel-based strategy combined with convenient ambient pressure drying. Static isotherm measurements and dynamic breakthrough tests using engineered Zr-MOF xerogel granules were conducted to illuminate the thermodynamic and kinetic characteristics for ammonia sorption. The G808 and G808-NH2 xerogels manifest substantially higher ammonia uptake, intensified interfacial interactions, and enhanced irreversible retention toward ammonia compared with the state-of-the-art activated carbon-based materials, particularly at the low-concentration region. Moreover, these hierarchical Zr-MOF nanoarchitectures exhibit extraordinary ammonia removal performance as well as excellent environmental robustness under simulated respirator canister/protection filter circumstances, with the breakthrough capacities of G808-NH2 being individually more than two and one orders of magnitude greater than those for the pristine and metal-amine impregnated carbons. The kinetic ammonia adsorption behaviors can be well delineated by the pseudo-first-order Wheeler-Jonas model. An in-depth discussion on the ammonia sorption regime, detailing five binding patterns besides reversible physisorption with a special focus on the impacts of polar amino groups and humidity, was proposed based on multiple characterizations and Grand Canonical Monte Carlo simulation. © 2022, The Authors. All rights reserved.

关键词： Ammonia

A Mixed Layer Height Parameterization in a 3-D Chemical Transport Model: Implications for Gas and Aerosol simulations

学校读者我要写书评

暂无评论

SSRN 2024年

作者： Kim, Hyeonmin Park, Rokjin J. Hong, Song-You Park, Do-Hyeon Kim, Sang-Woo Oak, Yujin J. Feng, Xu Lin, Haipeng Fu, Tzung-May School of Earth and Environmental Sciences Seoul National University Seoul Korea Republic of Cooperative Institute for Research in Environmental Sciences University of Colorado Boulder United States Physical Sciences Laboratory The National Oceanic and Atmospheric Administration Earth System Research Laboratories Boulder United States Center for Sustainable Environment Research Korea Institute of Science and Technology Seoul Korea Republic of John A. Paulson School of Engineering and Applied Sciences Harvard University CambridgeMA United States State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control School of Environmental Science and Engineering Southern University of Science and Technology Guangdong Shenzhen China Shenzhen Institute of Sustainable Development Southern University of Science and Technology Guangdong Shenzhen China Seoul National University Korea Republic of

Vertical mixing within the planetary boundary layer (PBL) is crucial for determining surface-level pollutant concentrations. However, standard PBL schemes in chemical transport models (CTMs) often fail to adequately define the upper bounds of vertical mixing, particularly at night. This limitation frequently results in overestimated nocturnal concentrations of pollutants near the surface. To address this issue, we propose a parameterization of mixed layer height (MLH) derived from the Yonsei University (YSU) PBL scheme and thoroughly evaluate it by comparing simulations with various observations. We utilized the Weather Research and Forecasting model coupled with GEOS-Chem (WRF-GC) to simulate gas and aerosol distributions over South Korea during the Satellite Integrated Joint Monitoring of Air Quality (SIJAQ) campaign in 2021. The WRF-GC simulations incorporating the MLH parameterization improved the excessive titration of O3 and the overproduction of HNO3 and NO3- in the model. Consequently, the model performances in gaseous and aerosol simulations showed a better agreement with observations, with changes in normalized mean biases (NMBs) of NOX (from 50% to -27%), O3 (from -49% to -28%), NO3- (from 126% to 91%), NH4+ (from 113% to 85%), BC (from 322% to 135%), and PM2.5 (from 58% to 28%). © 2024, The Authors. All rights reserved.

关键词： Atmospheric chemistry

Influence of floc dynamic protection layer on alleviating ultrafiltration membrane fouling induced by humic substances

学校读者我要写书评

暂无评论

Journal of environmental Sciences 2020年第4期32卷 10-19页

作者： Baiwen Ma Siqi Wu Bodong Wang Zenglu Qi Yaohui Bai Huijuan Liu Jiuhui Qu Ruijun Wu Key Laboratory of Drinking Water Science and Technology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing100085China University of Chinese Academy of Sciences Beijing100049China School of Environmental and Municipal Engineering Xi’an University of Architecture and TechnologyXi'an710055China School of Environment State Key Joint Laboratory of Environment Simulation and Pollution ControlTsinghua UniversityBeijing100084China Research Center for Water Quality and Ecology Tsinghua UniversityBeijing100084China State Key Laboratory of Membrane Materials and Membrane Applications Tianjin Motimo Membrane Technology Co.Ltd.Tianjin300457China

Cake layer formation is inevitable over time for ultrafiltration(UF)membrane-based drinking water *** the cake layer is always considered to cause membrane fouling,it can also act as a"dynamic protection layer",as it further adsorbs pollutants and dramatically reduces their chance of getting to the membrane ***,the UF membrane fouling performance was investigated with pre-deposited loose flocs in the presence of humic acid(HA).The results showed that the floc dynamic protection layer played an important role in removing *** higher the solution pH,the more negative the floc charge,resulting in lower HA removal efficiency due to the electrostatic repulsion and large pore size of the floc *** decreasing solution pH,a positively charged floc dynamic protection layer was formed,and more HA molecules were *** potential reasons were ascribed to the smaller floc size,greater positive charge,and higher roughness of the floc ***,similar membrane fouling performance was also observed for the negative and positive floc dynamic protection layers due to their strong looseness *** addition,the molecular weight(MW)distribution of HA also played an important role in UF membrane fouling *** the small MW HA molecules,the chance of forming a loose cake layer was high with a negatively charged floc dynamic protection layer,while for the large MW HA molecules it was high with a positively charged floc dynamic protection *** a result,slight UF membrane fouling was induced.

关键词： Ultrafiltration Floc dynamic protection layer Humic substances Fouling alleviation

How much is global business sectors contributing to sustainable development goals?

学校读者我要写书评

暂无评论

Sustainable Horizons 2022年 1卷

作者： Song, Lan Zhan, Xiaojiao Zhang, Huahan Xu, Ming Liu, Jianguo Zheng, Chunmiao Shenzhen Institute of Sustainable Development Southern University of Science and Technology Shenzhen518055 China State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control Southern University of Science and Technology Shenzhen518055 China School for Environment and Sustainability University of Michigan Ann ArborMI48109 United States Department of Civil and Environmental Engineering University of Michigan Ann ArborMI48109 United States Center for Systems Integration and Sustainability Michigan State University East LansingMI48823 United States

While the 17 United Nations Sustainable Development Goals (SDGs) have explicitly called on businesses to contribute, little is known to what extent have the business sectors engaged with the SDGs. Here we benchmarked the engagement of the Fortune Global Top 500 corporations with the SDGs based on publicly available information screened between November 1, 2019, and February 15, 2020. The results revealed that 304 of the 500 corporations had presented relevant content on their websites. However, 32.6% of the corporations tend to match their usual business practices with relevant SDGs instead of implementing new initiatives. Only 22.8% of the corporations developed specific actions or strategies for specific SDGs, and only 0.2% developed methods and tools to evaluate progress. European-headquartered corporations are leading the way to engage with the SDGs, whereas U.S.- and China-headquartered ones fall short. The SDG 8 (Decent Work and Economic Growth) and SDG 13 (Climate Action) are the most popular SDGs among these corporations. At the same time, SDG 2 (Zero Hunger) and SDG 14 (Life below Water) received the slightest interest. The level of engagement is uneven across various business sectors, with the corporations in the Information & Technology sector have largely engaged with the SDGs. In contrast, the Health Care sector has shown the slightest interest in the SDGs. Our results call for leading corporations in these sectors for continuous and enhanced efforts to help accelerate the global process towards the SDGs. Governments could provocatively encourage and regulate business sectors to engage with the SDGs and disclose uniform data to benchmark the progress towards a sustainable future. © 2022

关键词： Sustainable development

Enhanced Resource Recovery from Wastewater Using Electrochemical-Osmotic System with Nanofiltration Membranes

学校读者我要写书评

暂无评论

SSRN 2022年

作者： Wang, Chi Sun, Meng Wang, Xianze Zhang, Xuan Zhao, Yumeng Huo, Mingxin Science and Technology Innovation Center for Municipal Wastewater Treatment and Water Quality Protection Northeast Normal University Changchun130117 China Center for Water and Ecology State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing100084 China Key Laboratory of New Membrane Materials Ministry of Industry and Information Technology School of Environmental and Biological Engineering Nanjing University of Science and Technology Nanjing210094 China State Key Laboratory of Urban Water Resource and Environment Harbin Institute of Technology Harbin150090 China

Mining diverse resources from electroplating wastewater are critical for maximizing wastewater economic value and minimizing adverse environmental impacts. We have demonstrated an autonomous electrochemical-osmotic system (EOS), which can simultaneously recover copper metals, water, and electric energy from wastewater. In this study, we enhanced water production, electricity generation, and metal recovery of the EOS using polyelectrolyte multilayer nanofiltration (PMNF) membranes. Results suggested that the water/salt selectivity of the PMNF membrane increase to 25.1 L mol -1 with the increase of the number of the polyelectrolyte deposited layers to 6.0. The EOS assembled with a 1.5-layer PMNF membrane achieved a water production rate of 6.06 L m -2 h -1 and a maximum power density of 1.18 mW cm -2 by treating synthetic electroplating wastewater. Further, we clarified that the PMNF-EOS effectively inhibited the forward transport of various metal cations while also extracting freshwater, generating power, and recovering copper from electroplating wastewater. © 2022, The Authors. All rights reserved.

关键词： Wastewater treatment

Exploring Diversity Patterns and Driven Mechanisms of Antibiotic Resistome and Microbiome in Saline groundwater

学校读者我要写书评

暂无评论

SSRN 2022年

作者： Sun, Weiling Tang, Moran Chen, Qian Zhong, Haohui Ju, Feng Wu, Yang Hu, Jingrun Li, Si College of Environmental Sciences and Engineering Peking University State Environmental Protection Key Laboratory of All Material Fluxes in River Ecosystems Beijing100871 China The Key Laboratory of Water and Sediment Sciences Ministry of Education International Joint Laboratory for Regional Pollution Control Ministry of Education Beijing100871 China Key Laboratory of Coastal Environment Resources of Zhejiang Province School of Engineering Westlake University Hangzhou310024 China Institute of Advanced Technology Westlake Institute for Advanced Study Hangzhou310024 China Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation College of Resources and Environmental Sciences China Agricultural University Beijing100193 China

Saline groundwater is witnessed globally, where various factors can exert complex selective pressure to antibiotic resistance genes (ARGs) (i.e., resistome). However, the comprehensive profile of antibiotic resistome and its determining factors in saline groundwater are poorly understood. This study comparatively investigated the dynamics of biotic (i.e., microbiota and mobile genetic elements) and abiotic (i.e., water parameters and antibiotics) factors over salinity gradients, and further explored their roles in shaping saline groundwater resistome. Overall, the resistome harbored 166 ARGs conferring resistance to 16 classes of antibiotics with abundance of 0.002-0.306 copies/cell and showed significant variation in saline groundwater. The microbiota β-diversity influenced the resistome abundance directly, while antibiotics (mainly sulfonamides) and mobilome affected directly the resistome composition. environmental variables, such as organic carbon, high sulfate-dominated salinity, and metals (e.g., cobalt, potassium and lithium), indirectly affected the resistome via acting on the microbiota and mobilome. Moreover, the inter-correlations of resistome with mobilome and microbiota weakened in groundwater with high salinity, indicating the lower horizontal gene transfer potentials of resistome in higher salinity groundwater. The major hosts and mobility potentials of ARGs in groundwater resistome changed across salinity gradients. The findings offer a vital perceptiveness in the management of antimicrobials in saline groundwater. © 2022, The Authors. All rights reserved.

关键词： groundwater

Effect of water- and acid-pickling of aquaticplant biochar on the adsorption of Cd

学校读者我要写书评

暂无评论

IOP Conference Series: Materials Science and Engineering 2021年第1期1167卷

作者： Wenbing Tan State Environmental Protection Key Laboratory of Simulation and Control of Groundwater Pollution Chinese Research Academy of Environmental Sciences Beijing 100012 China

To reveal the influencing factors and mechanism of adsorption of heavy metal Cd by biochar, different elution solvents (water and dilute acid solution) were used in this paper to elute the residual ash substances after pyrolysis of biochar, then the pH was regulated to investigate the adsorption effect of biochar on Cd in different treatment conditions. The precipitation experiments of Cd by biochar soaking and washing filtrate showed that the precipitation of root, stem and leaf of Acorus calamus L. contributed a great deal to the heavy metal removal system, which accounting for 81%, 77% and 98%, respectively, and the adsorption effect of biochar of roots, stems and leaves of Acorus calamus L. on Cd was slightly increased after washing. The adsorption experiment of biochar pickling on heavy metals showed that the adsorption effect of biochar on heavy metals Cd decreased greatly after pickling, which may be due to the removal of most of the minerals on the surface of biochar after pickling and the decrease of pH value of biochar. This work can provide insights into the use of biochar to control Cd.

关键词：

Catalytic Oxidation Mechanism of Ash3 Over Cuo@Sio2 Core-Shell Catalysts Via Experimental and Theoretical Studies

学校读者我要写书评

暂无评论

SSRN 2022年

作者： Li, Kunlin Feng, Jiayu Hao, Xingguang Song, Xin Zhang, Changbin Ning, Ping Li, Kai State Key Joint Laboratory of Environment Simulation and Pollution Control Research Center for Eco-Environment Sciences Chinese Academy of Sciences Beijing100085 China Faculty of Environmental Science and Engineering Kunming University of Science and Technology Kunming650500 China University of Chinese Academy of Sciences Beijing100049 China

In this work, the CuO@SiO2 catalysts were synthesized successfully and applied to efficiently remove highly toxic AsH3 gas by catalytic oxidation at low temperature and low oxygen. The duration of the AsH3 conversion rate above 90% was 39h, which is much higher than that of others previously reported in the literature. The considerable catalytic activity and stability were attributed to the protection and confinement effects of the SiO2 shell, resulting in highly dispersed CuO nanoparticles. Meanwhile, the strong interaction between CuO core and SiO2 shell further facilitated the formation of active species such as coordinatively unsaturated Cu2+ and chemisorbed oxygen. And the accumulation of oxidation products on the Si-O-Cu interface and pore channels of the SiO2 shell is the main cause of the deactivation of the catalysts. Furthermore, through the combined DFT calculation and characterization methods, a reaction pathway including gradual dehydrogenation and gradual oxidation for catalytic oxidation of AsH3 on CuO (111) surface was constructed to clarify the detailed microscopic reaction mechanism. The CuO@SiO2 core-shell catalysts applied in this study could provide a powerful method of developing AsH3 catalysts from many know AsH3 removal systems. © 2022, The Authors. All rights reserved.

关键词： Catalytic oxidation

Enhanced extraction of scandium and inhibiting of iron from acid leaching solution of red mud by D2EHPA and sodium chloride

学校读者我要写书评

暂无评论

Journal of Central South University 2021年第10期28卷 3029-3039页

作者： LIWang LIU Yue ZHU Xiao-bo School of Chemistry and Chemical Engineering Henan Polytechnic UniversityJiaozuo 454000China State Environmental Protection Key Laboratory of Mineral Metallurgical Resources Utilization and Pollution Control Wuhan University of Science and TechnologyWuhan 430081China Collaborative innovation center of coal mine safety of Henan Province Henan Polytechnic UniversityJiaozuo 454000China

D2EHPA(P204),tri-butyl-phosphate(TBP)and sodium chloride(NaCl)were attractive for selective extraction of scandium from acid leaching solution of red *** extraction parameters of P204 concentration(X_(P204)),NaCl concentration(C_(NaCl)),pH value,reaction time,stirring speed and O/A were investigated to extract scandium and separate iron from the acid leaching *** extraction mechanism was analyzed by Fourier transform infrared spectroscopy(FT-IR)and thermodynamic *** single-stage extraction efficiency of scandium,iron andβ(Sc/Fe)were 99.1%,9.4%and 1061.2,respectively,with C_(NaCl) of 75 g/L and XP204 of 0.75 at solution pH value of 1.2 and stirring speed of 200 r/min for 6 min,in which a good separation effect of scandium and iron was *** vibration absorption peak Sc─O was contributed to the extraction of scandium with *** complex[FeCln]^(3−n) existed in the solution with adding NaCl into the acid leaching *** value of n was higher and the valence state of the complex[FeCln]^(3−n) was lower with an increase of chloride concentration,which restricts the extraction efficiency of iron with *** extraction of three stages in the counter-current simulation experiments was carried out according to the McCabe-Thiele *** free energy change(ΔG)of−5.93 kJ/mol,enthalpy change(ΔH)of 23.45 kJ/mol and entropy change(ΔH)of 98.54 J/(mol·K)were obtained in the solvent extraction proces,which indicate that the extraction reaction is easily spontaneous and endothermic and a proper increase of temperature is conducive to the extraction of scandium.

关键词： scandium selective extraction D2EHPA/sodium chloride leaching solution red mud