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Green synthesis of zeolite and its regeneration for adsorption of ammonia nitrogen in water

environmental Science and Pollution Research 2025年第9期32卷 5132-5142页

作者： Chen, Jie Liu, Junjie Zhang, Ze Wang, Jing Bi, Shiming Tang, Xiaojun Huang, Zhujian Key Laboratory of Environment and Safety Technology of Transportation Infrastructure Engineering CCCC CCCC Fourth Harbor Engineering Institute Co. Ltd. Guangzhou510230 China The Seventh Engineering Company of CCCC Fourth Harbor Engineering Co. Ltd Guangzhou510230 China Guangdong Provincial Key Laboratory of Agricultural & Rural Pollution Abatement and Environmental Safety College of Natural Resources and Environment South China Agricultural University 483 Wushan St. Guangzhou510642 China

This study presents a novel green approach for the preparation of zeolite material from fly ash using a combination of mechanochemical methods. The physicochemical properties of the synthesized zeolite, including crystal structure and porosity, were systematically investigated. The synthesized zeolite was employed for the adsorption of ammonia nitrogen from aqueous solutions, and their adsorption kinetics and thermodynamics were comprehensively studied. The results revealed that the adsorption of ammonia nitrogen onto the zeolite follows the Langmuir adsorption model. Additionally, the zeolite exhibited strong selective adsorption and remarkable resistance to interference from coexisting cations in the aqueous solution. Finally, regeneration experiments were conducted using NaCl, NaClO, and their mixtures to desorb ammonia nitrogen from the spent zeolite. A total of 17 regeneration cycles were performed until the adsorption capacity of the zeolites was exhausted. The adsorption performance of the regenerated zeolite was evaluated to assess the impact of different reagents and regeneration cycles on adsorption efficiency. The optimal regeneration method was identified, leading to the successful valorization of fly ash into zeolite for ammonia adsorption and the development of effective regeneration strategies for spent zeolite. © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2025.

关键词： Ammonia

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Transient multi-physics behavior of an insert high temperature superconducting no-insulation coil in hybrid superconducting magnets with inductive coupling

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Applied Mathematics and Mechanics(English Edition) 2023年第2期44卷 255-272页

作者： Xiang KANG Yujin TONG Wei WU Xingzhe WANG Key Laboratory of Mechanics on Western Disaster and Environment Ministry of EducationCollege of Civil Engineering and MechanicsKey Laboratory of Special Function Materials and Structure Design of Ministry of EducationLanzhou UniversityLanzhou 730000China Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China

A transient multi-physics model incorporated with an electromagneto-thermomechanical coupling is developed to capture the multi-field behavior of a single-pancake(SP)insert no-insulation(NI)coil in a hybrid magnet during the charging and discharging *** coupled problem is resolved by means of the finite element method(FEM)for the magneto-thermo-elastic behaviors and the Runge-Kutta method for the transient responses of the electrical circuits of the hybrid superconducting magnet *** results reveal that the transient multi-physics responses of the insert NI coil primarily depend on the charging/discharging procedure of the hybrid ***,a reverse azimuthal current and a compressive hoop stress are induced in the insert NI coil during the charging process,while a forward azimuthal current and a tensile hoop stress are observed during the discharging *** induced voltages in the insert NI coil can drive the currents flowing across the radial turns where the contact resistance ***,it brings forth significant Joule heat,causing a temperature rise and a uniform distribution of this heat in the coil ***,a thermally/mechanically unstable or quenching event may be encountered when a high operating current is flowing in the insert NI *** is numerically predicted that a quick charging will induce a compressive hoop stress which may bring a risk of buckling instability in the coil,while a discharging will *** simulations provide an insight of hybrid superconducting magnets under transient start-up or shutdown phases which are inevitably encountered in practical applications.

关键词： hybrid superconducting magnet high temperature superconducting(HTS)no-insulation(NI)coil inductive coupling multi-physics field thermal stability

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An effective planting model to decrease cadmium accumulation in rice grains and plants:Intercropping rice with wetland plants

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Pedosphere 2023年第2期33卷 355-364页

作者： Huimin XIANG Ni LAN Fugang WANG Benliang ZHAO Hui WEI Jiaen ZHANG Guangdong Provincial Key Laboratory of Eco-Circular Agriculture South China Agricultural UniversityGuangzhou 510642(China) Key Laboratory of Agro-Environment in the Tropics Ministry of AgricultureCollege of Natural Resources and EnvironmentSouth China Agricultural UniversityGuangzhou 510642(China) Guangdong Engineering Research Center for Modern Eco-Agriculture and Circular Agriculture Guangzhou 510642(China) Key Laboratory of Agroecology and Rural Environment of Guangdong Regular Higher Education Institutions South China Agricultural UniversityGuangzhou 510642(China)

Cadmium(Cd)pollution affects plant growth and poses a serious threat to food safety and human ***-contaminated rice is assumed to be the main source of Cd exposure to humans,with grave health *** is an efficient,cost-effective,and eco-friendly approach to minimize Cd accumulation in ***,research on the effect of rice intercropping with wetland plants that exhibit great capacity for phytoremediation in decreasing Cd concentrations in paddies is limited.A pot experiment in greenhouse was conducted to evaluate the effect of rice intercropping with two wetland plants(Pontederia cordata and Canna indica)under different soil Cd levels(0,1,10,and 25 mg kg^(-1))on rice growth and Cd accumulation and *** results showed that rice intercropping with the two wetland plants significantly improved plant height,tiller,and biomass of rice,but reduced Cd bioconcentration factors(BCFs)and Cd concentrations in rice and wetland *** with rice monocropping,the BCF in rice grain under 25 mg kg^(-1)soil Cd level significantly decreased by 54.39%and 59.65%in the systems of rice intercropping with *** and ***,*** addition,intercropping inhibited the increase in BCFs in rice and wetland plants under increasing soil Cd *** conclusion,the systems of rice intercropping with *** and *** can be considered two new and effective approaches for ameliorating Cd pollution in paddies,as well as minimizing Cd accumulation in rice and improving food *** the two intercropping systems,rice intercropping with *** performed better than intercropping with ***.

关键词： bioconcentration factor Cd pollution Cd translocation phytoremediation transfer factor

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Interface-induced charge transfer pathway switching of a Cu_(2)O-TiO_(2)photocatalyst from p-n to S-scheme heterojunction for effective photocatalytic H_(2)evolution

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Journal of Materials Science & Technology 2024年第26期193卷 98-106页

作者： Kaihui Huang Guijie Liang Shaolong Sun Haobin Hu Xiaoming Peng Rongchen Shen Xin Li Institute of Biomass Engineering Key Laboratory of Energy Plants Resource and UtilizationMinistry of Agriculture and Rural AffairsSouth China Agricultural UniversityGuangzhou 510642China Hubei Key Lab Low Dimens Optoelect Mat&Devices Hubei University of Arts and ScienceXiangyang 441053China College of Natural Resources and Environment South China Agricultural UniversityGuangzhou 510642China Key Laboratory of Efficient Utilization of Oil and Gas Resources in Longdong College of Petroleum and Chemical EngineeringLongdong UniversityQingyang 745000China State Key Laboratory of Pollution Control and Resource Reuse School of the EnvironmentNanjing UniversityNanjing 210023China

Photocatalytic hydrogen evolution from water splitting is an appealing method for producing clean chemical ***_(2)O,with a suitable bandgap,holds promise as a semiconductor for this ***,the strong photo-corrosion and rapid charge recombination of Cu_(2)O strongly limit its application in the photocatalytic ***,an S-scheme heterojunction photocatalyst composed of TiO_(2)and Cu_(2)O was rationally designed to effectively avoid the photo-corrosion of Cu_(2)*** introduction of an interfacial nitrogen-doped carbon(NC)layer switches the heterojunction interfacial charge transfer pathway from the p-n to S-scheme heterojunction,which avoids excessive accumulation of photogenerated holes on the surface of Cu_(2)***,the hybrid structure shows a broad spectral response(300-800 nm)and efficient charge separation and transfer ***,the highest photocatalytic hydrogen evolution rate of TiO_(2)-NC-3%Cu_(2)O-3%Ni is 13521.9μmol g^(-1)h^(-1),which is approximately 664.1 times higher than that of pure Cu_(2)***-situ X-ray photoelectron spectroscopy and Kelvin probe confirm the charge transfer mechanism of S-scheme *** formation of S-scheme heterojunctions effectively accelerates the separation of photogenerated electron-hole pairs and enhances redox capacity,thereby improving the photocatalytic performance and stability of Cu_(2)*** study provides valuable insights into the rational design of highly efficient Cu_(2)O-based heterojunction photocatalysts for hydrogen production.

关键词： Photocatalytic hydrogen evolution Cu_(2)O S-scheme heterojunction Charge separation mechanism Nitrogen doped carbon

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Oligomeric procyanidins combined with Parabacteroides distasonis ameliorate high-fat diet-induced atherosclerosis by regulating lipid metabolism,inflammation reaction and bile acid metabolism in ApoE^(-/-)mice

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Food Science and Human Wellness 2024年第5期13卷 2847-2856页

作者： Mingjuan Xu Cheng Lü Yiqing Hu Mo Zhang Jinxin Shen Chunyi Liu Qun Lu Rui Liu College of Food Science and Technology Huazhong Agricultural UniversityWuhan 430070China Wuhan Engineering Research Center of Bee Products on Quality and Safety Control Wuhan 430070China Institute for Environment and Safety Wuhan Academy of Agricultural SciencesWuhan 430070China Key Laboratory of Environment Correlative Dietology(Huazhong Agricultural University) Ministry of EducationWuhan 430070China Key Laboratory of Urban Agriculture in Central China Ministry of Agriculture and Rural AffairsWuhan 430070China

Atherosclerosis(AS)is the main pathological basis of cardiovascular ***,the prevention and treatment strategies of AS have attracted great research *** a potential probiotic,Pararabacteroides distasonis has a positive regulatory effect on lipid metabolism and bile acids(BAs)*** procyanidins have been confirmed to be conducive to the prevention and treatment of AS,whose antiatherosclerotic effect may be associated with the promotion of gut ***,it remains unclear whether and how oligomeric procyanidins and *** combined(PPC)treatment can effectively alleviate high-fat diet(HFD)-induced *** this study,PPC treatment was found to significantly decrease atherosclerotic lesion,as well as alleviate the lipid metabolism disorder,inflammation and oxidative stress injury in ApoE^(-/-)***,targeted metabolomics demonstrated that PPC intervention altered the BA profile in mice by regulating the ratio of secondary BAs to primary BAs,and increased fecal BAs ***,quantitative polymerase chain reaction(qPCR)analysis showed that PPC intervention facilitated reverse cholesterol transport by upregulating Srb1 expression;In addition,PPC intervention promoted BA synthesis from cholesterol in liver by upregulating Cyp7a1 expression via suppression of the farnesoid X receptor(FXR)pathway,thus exhibiting a significant serum cholesterol-lowering *** summary,PPC attenuated HFD-induced AS in ApoE^(-/-)mice,which provides new insights into the design of novel and efficient anti-atherosclerotic strategies to prevent AS based on probiotics and prebiotics.

关键词： Atherosclerosis Pararabacteroides distasonis Oligomeric procyanidins Reverse cholesterol transport Bile acid metabolism

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Photocatalytic CO_(2)-to-Ethylene Conversion over Bi_(2)S_(3)/CdS Heterostructures Constructed via Facile Cation Exchange

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Research 2023年第1期2022卷 389-398页

作者： Hai-Bo Huang Ning Zhang Jian-Ying Xu Yu-Hang Xu Ya-Feng Li Jian Lu Rong Cao Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation College of Resources and EnvironmentFujian Agriculture and Forestry UniversityFuzhouChina State Key Laboratoryof StructuralChemistry Fujian Institute of Research on the Structure of MatterChinese Academyof Sciences FuzhouChina School of Environmental Science and Engineering Qingdao UniversityQingdaoChina State Key Laboratory of Photocatalysis on Energy and Environment Fuzhou UniversityFuzhouChina

Solar-driven CO_(2)conversion to multicarbon(C_(2+))products has emerged as a key challenge,yet this calls for a systematic investigation on the overall reaction process and mechanism at an atomic level based on the rational design of highly selective ***,we report the synthesis of compact Bi_(2)S_(3)/Cds heterostructures via facile cation exchange,by which a unique pathway of CO_(2)-to-C_(2)H_(4) photoconversion is ***,the BCS-30 shows an optimal C_(2)H_(4) production rate of 3.49μmolh^(-1)g^(-1) based on the regulation of band structures and energy levels of photocatalysts by controlled growth of Bi_(2)S_(3) at CdS *** experimental and theoretical results(DFT calculations)identify Bi atoms as new catalytic sites for the adsorption of CO*and formation of*CO-*CO dimers that further hydrogenate to produce ***,this work demonstrates vast potentials of delicately designed heterostructures for CO_(2) conversion towards C_(2+)products under mild photocatalytic conditions.

关键词： conditions surface Ethylene

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Measurement of Transverse Tensile Interfacial Strength of REBCO-Coated Conductors

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Acta Mechanica Solida Sinica 2022年第1期35卷 40-50页

作者： Peifeng Gao Xin Geng Houyuan Zhang Guian Man Xingzhe Wang Key Laboratory of Mechanics on Western Disaster and Environment Ministry of EducationCollege of Civil Engineering and MechanicsKey Laboratory of Special Function Materials and Structure Design of Ministry of EducationLanzhou UniversityLanzhou 730000China

We present a new test method for the accurate measurement of the transverse tensile interfacial strength of rare-earth barium copper oxide(REBCO)-coated conductor(CC)tapes to overcome heavy scattering of data tested using regular test methods.A new composite structure specimen is designed and constructed by solidifying a standard epoxy resin tensile specimen using the three-dimensional printing technology,where a short REBCO CC tape is *** feasibility of the proposed test method is numerically validated through finite element(FE)*** results show that the valid delaminated strength is 2.19-2.51 MPa with the maximum relative error of 7.3%,indicating the elimination of significant scattering in the tested *** analysing the morphology of the delaminated interfaces and energy-dispersive spectroscopy results,it is discovered that delamination primarily occurs at the interface between the REBCO superconducting layer and the buffer layer and that a small portion of the REBCO and buffer layers peels *** error analysis based on the FE method indicates that the tape is more likely to delaminate because of initial defects,whereas the adhesion at the edges of the CC tape due to the redundancy of the epoxy resin increases the resistance of the CC tape to delamination,resulting in a higher testing value than the real one.

关键词： REBCO-coated conductor tapes Delamination strength Transverse tension Experimental method Finite element analysis Cohesive zone model

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Adoption of open source software on gas emission and digital twin design of livestock housing 11

Adoption of open source software on gas emission and digital...

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11th European Conference on Precision Livestock Farming

作者： Liu, Kai Wang, Yulin Liang, Wei Li, Hao Shi, Zhengxiang College of Water Resources & Civil Engineering China Agricultural University Qing-hua East Road 17 100083 China Key Laboratory of Agricultural Engineering in Structure and Environment Ministry of Agriculture and Rural Affairs Beijing100083 China Beijing Engineering Research Center on Animal Healthy Environment Beijing1 0008-3 China

ISBN: (纸本)9791221067361

Animal production is affected by the environmental air flow organization, and the emission of polluting gases in production process has a huge impact on the environment and production itself, which requires computational fluid dynamics(CFD) simulation to reflect the situation and solve problems. In addition, open source software is an automatic and economical choice for engineers to adapt to complex workflow, but the accuracy of open source software still needs to be evaluated. Mainly based on the open source software OpenFOAM and Blender, this study aims to develop a digital twin process method, in order to visually represent the production status and environmental airflow field of livestock housing. Prior to developing the method, this paper investigates the accuracy of OpenFOAM in simulating gas species transport, specifically focusing on the distribution data of ammonia and methane obtained from experiments conducted in realistic dairy barn settings. Then, Blender is used to create a detailed digital twin model that showcases the dairy barn production scenarios, which will be presented in virtual reality (VR). Additionally, it integrates OpenFOAM post-processing results to visualize the aerodynamic environment details within livestock farm environments. The results show that OpenFOAM can accurately simulate the gas emissions of livestock housing, and the Blender and OpenFOAM can be combined to visually represent the production status and production environment of livestock farms through virtual reality (VR). © 2024 11th European Conference on Precision Livestock Farming. All rights reserved.

关键词： Digital storage

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Grasping emergency dynamics:A review of group evacuation techniques and strategies in major emergencies

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Journal of Safety Science and Resilience 2025年第1期6卷 1-20页

作者： Hai Sun Guorui Han Xiaowei Zhang Xuejing Ruan College of Engineering Ocean University of ChinaQingdao 266100China Key Laboratory of Marine Environment and Ecology Ministry of EducationOcean University of ChinaQingdao 266100China College of Civil Engineering and Architecture Qingdao Agricultural UniversityQingdao 266109China School of Engineering Design and Built EnvironmentWestern Sydney UniversityNSW 2745Australia

Major sudden disasters,such as floods,earthquakes,and fires,often cause significant *** evacuation is crucial in mitigating these *** types of disaster incidents vary significantly in terms of impact scope,suddenness,and *** type of disaster possesses distinct characteristics,necessitating varying requirements for emergency ***,we conducted a bibliometric analysis and visual mapping of evacuation processes in major natural disasters from 2004-2023,analyzing 7213 publications from the Web of Science database via VOSviewer and *** study identified three developmental phases:an initial phase(pre-2011)with 1169 publications,a growth phase(2012-2018)with 2772 publications,and an expansion phase(post-2019)with 3335 *** study provides a comprehensive review and classification of emergency evacuation theories and methods in major disaster *** emphasizes the necessity of assessing the scope and intensity of different types of major emergent disasters,defining and simulating the affected behaviors of the influenced populations,and formulating differentiated emergency evacuation strategies *** analysis reveals two main trends supporting these findings:an increasing focus on complex evacuation modeling and simulation techniques,manifested in the application of various simulation-optimized microscopic and macroscopic models such as cellular automata,social force models,agent-based models,pedestrian flow,and network flow models,enhancing disaster understanding and prediction capabilities;and the strategic development of tailored evacuation strategies for specific disaster contexts,thereby improving disaster response *** key future pathways for safety evacuation research are outlined:refining evacuation behavior models for greater accuracy,improving the coordination of complex,multi-level evacuation procedures,and integrating indoor and outdoor evacuation strategi

关键词： Evacuation simulation Simulation modeling Strategy optimization Disaster management Bibliometric analysis

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Foliar-applied zinc promotes cadmium allocation from leaf surfaces to grains in rice

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Journal of environmental Sciences 2025年第5期151卷 582-593页

作者： Ya-Ting Liu Bo-Fang Yan Xuan Cai Hong-Xiang Zheng Rong-Liang Qiu Ye-Tao Tang School of Environmental Science and Engineering Sun Yat-sen UniversityGuangzhou 510006China Institute of Facility Agriculture Guangdong Academy of Agricultural SciencesGuangzhou 510640China Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology Sun Yat-sen UniversityGuangzhou 510006China Guangdong Provincial Key Laboratory of Agricultural&Rural Pollution Abatement and Environmental Safety College of Natural Resources and EnvironmentSouth China Agricultural UniversityGuangzhou 510642China

The accumulation of Cd by rice poses significant health *** fertilizationwith Zn can reduce grain Cd contents in rice grown in Cd-contaminated ***,atmospheric deposition on leaves is another vector of Cd contamination,and it remains unclear how Zn application affects the allocation of such *** conducted an experiment where the flag leaves of rice plants were treated with solutions with various Zn concentrations and a constant Cd *** 111Cd stable isotope was used to trace the flux of foliarapplied *** levels of foliar-applied Zn enhanced Cd efflux and grain *** is attributed to limited sequestration of foliar-applied Cd in the leaf cell symplasm and increased Cd desorption from leaf cell walls when a high Zn^(2+)concentration occurs in the *** Zn oxide nanoparticlesmitigated these ***,the expressions of OsLCT1 and OsZIP7 in flag leaves and OsHMA2 and OsZIP7 in the uppermost nodes were upregulated under high-Zn^(2+)treatment,which may facilitate Cd phloem loading and grain *** is advised in using foliar Zn in areas with high atmospheric Cd due to potential grain-contamination risks.

关键词： Atmospheric deposition Isotope labelling Metal interaction Phloem Cell wall

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