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Oxygen atmosphere enhances ball milling remediation of petroleum-contaminated soil and reuse as adsorptive/catalytic materials for wastewater treatment

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Journal of Environmental Sciences 2025年第1期147卷 652-664页

作者： Pingting Gao Simin Song Mingxin Wang Meng Yao Jinjuan Xue School of Environmental Science and Engineering Changzhou UniversityChangzhou 213164China Jiangsu petrochemical Safety and Environmental Protection Engineering research Center Changzhou 213164China

Ball milling is an environmentally friendly technology for the remediation of petroleumcontaminated soil(PCS),but the cleanup of organic pollutants requires a long time,and the post-remediation soil needs an economically viable disposal/reuse strategy due to its vast *** present paper develops a ball milling process under oxygen atmosphere to enhance PCS remediation and reuse the obtained carbonized soil(BCS-O)as wastewater treatment *** total petroleum hydrocarbon removal rates by ball milling under vacuum,air,and oxygen atmospheres are 39.83%,55.21%,and 93.84%,*** Langmuir and pseudo second-order models satisfactorily describe the adsorption capacity and behavior of BCS-O for transition *** Cu^(2+),Ni^(2+),and Mn^(2+)adsorbed onto BCS-O were mainly bound to metal carbonates and metal ***,BCS-O can effectively activate persulfate(PDS)oxidation to degrade aniline,while BCS-O loaded with transition metal(BCS-O-Me)shows better activation efficiency and ***-O and BCS-O-Me activated PDS oxidation systems are dominated by^(1)O_(2)oxidation and electron *** main active sites are oxygen-containing functional groups,vacancy defects,and graphitized *** oxygen-containing functional groups and vacancy defects primarily activate PDS to generate^(1)O_(2)and attack *** carbon promotes aniline degradation by accelerating electron *** paper develops an innovative strategy to simultaneously realize efficient remediation of PCS and sequential reuse of the postremediation soil.

关键词： Petroleum-contaminated soil Ball milling Oxygen atmosphere Pyrolysis Resource utilization

Impact of Various Silicon Sources on the Synthesis of Mordenite and Differences in the Carbonylation Reaction of Dimethyl Ether

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Chemical research in Chinese Universities 2025年第1期41卷 59-65页

作者： CHEN Long WANG Yunzheng LV Jiangang YANG Weimin School of Chemical Engineering East China University of Science and TechnologyShanghai200237P.R.China Sinopec Shanghai research institute of petrochemical Technology Co. Ltd.Shanghai201208P.R.China

This study introduces an innovative method for synthesizing mordenite(MOR)by employing a combination of water glass and fumed silica as the silica *** zeolite produced through this method exhibits a smaller grain size,a larger specific surface area,and a greater number of Brønsted acid sites compared to the conventionally synthesized mordenite using silica ***,the chemical environment of framework Al in MOR zeolites is influenced by different silica sources,leading to varied acid properties between the two MOR zeolites,which results in an enhanced activity of dimethyl ether carbonylation from 50%to over 83%.

关键词： Mordenite Silica source DME carbonylation

Atomically Precise Cu Nanoclusters:Recent Advances,Challenges,and Perspectives in Synthesis and Catalytic Applications

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Nano-Micro Letters 2025年第4期17卷 130-165页

作者： Mengyao Chen Chengyu Guo Lubing Qin Lei Wang Liang Qiao Kebin Chi Zhenghua Tang New Energy research institute School of Environment and EnergySouth China University of TechnologyGuangzhou Higher Education Mega CentreGuangzhou 510006People’s Republic of China petrochemical research institute PetroChina Company LimitedBeijing 102206People’s Republic of China Key Laboratory of Functional Inorganic Material Chemistry(Heilongjiang University) Ministry of EducationHarbin 150001People’s Republic of China

Atomically precise metal nanoclusters are an emerging type of nanomaterial which has diverse interfacial metal-ligand coordination motifs that can significantly affect their physicochemical properties and *** that,Cu nanoclusters have been gaining continuous increasing research attentions,thanks to the low cost,diversified structures,and superior catalytic performance for various *** this review,we first summarize the recent progress regarding the synthetic methods of atomically precise Cu nanoclusters and the coordination modes between Cu and several typical ligands and then discuss the catalytic applications of these Cu nanoclusters with some explicit examples to explain the atomical-level structure-performance ***,the current challenges and future research perspectives with some critical thoughts are *** hope this review can not only provide a whole picture of the current advances regarding the synthesis and catalytic applications of atomically precise Cu nanoclusters,but also points out some future research visions in this rapidly booming field.

关键词： Atomically precise Cu nanoclusters Controllable synthesis Catalytic applications Structure-performance relationship Challenges and perspectives

A dopant-assisted iodide-adduct chemical ionization time-of-flight mass spectrometer based on VUV lamp photoionization for atmospheric low-molecular-weight organic acids analysis

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Journal of Environmental Sciences 2025年第3期149卷 500-511页

作者： Yonglei Zhang Ruidong Liu Mei Li Yingzhe Guo Jichuang Kong Keyong Hou Environment research institute Shandong UniversityQingdao 266237China

Formic and acetic acids are the most abundant gaseous organic acids and play the key role in the atmospheric *** iodine-adduct chemical ionizationmass spectrometry(CIMS),the low utilization efficiency of methyl iodide and humidity interference are two major issues of the vacuum ultraviolet(VUV)lamp initiated CIMS for on-line gaseous formic and acetic acids *** this work,we present a new CIMS based on VUV lamp,and the ion-molecular reactor is separated into photoionization and chemical ionization zones by a reducer *** was added to the photoionization zone,and the VUV photoionization acetone provided low-energy electrons for methyl iodide to generate I−,and the addition of acetone reduced the amount of methyl iodide by 2/*** the chemical ionization zone,a headspace vial containing ultrapure water was added for humidity calibration,and the vial changes the sensitivity as a function of humidity from ambiguity to well linear correlation(R2>0.95).With humidity calibration,the CIMS can quantitatively measure formic and acetic acids in the humidity range of 0%-88%*** this mode,limits of detection of 10 and 50 pptv are obtained for formic and acetic acids,*** the relative standard deviation(RSD)of quantitation stability for 6 days were less than 10.5%.This CIMS was successfully used to determine the formic and acetic acids in the underground parking and ambient environment of the Shandong University campus(Qingdao,China).In addition,we developed a simple model based formic acid concentration to assess vehicular emissions.

关键词： Formic acid Acetic acid Vacuum ultraviolet(VUV)lamp photoionization(PI) Chemical ionization(CI) Time-of-flight mass spectrometry (TOFMS) Trace gases measurement

Direct Synthesis of UOS Zeolite Using a Simple and Commercially Available Organic Structure-directing Agent

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Chemical research in Chinese Universities 2025年第1期41卷 113-120页

作者： HU Chao FU Wenhua YUAN Zhiqing LIU Chuang WANG Zhendong YANG Weimin School of Chemical Engineering East China University of Science and TechnologyShanghai200237P.R.China State Key Laboratory of Green Chemical Engineering and Industrial Catalysis Sinopec Shanghai Research Institute of Petrochemical Technology Co.Ltd.SinopecShanghai201208P.R.China

The preparation of zeolite utilizing commercially available organic compounds instead of complex and expensive ones is of practical ***,we report the synthesis of germanosilicate zeolite with UOS framework by utilizing a simple and commercially available compound 3-diethylamino-1-propanol(DEAP)as organic structure-directing agent(OSDA)under fluoride *** synthesis has been optimized by rational modification of the variables,including the Si/Ge molar ratios,the amount of DEAP and F−anions,the concentration of the synthesis gel and crystallization *** zeolite materials were prepared with Si/Ge ratio in the range of 1–*** physicochemical properties,including crystallinity,crystal morphology,chemical environment of framework elements,textural properties and acidity were characterized by multiple *** atoms are proved to preferentially occupy the T sites in the double-four-ring(D4Rs)*** to the isostructural IM-16 zeolite,the UOS zeolites prepared herein are of similar textural properties,such as specific surface area and micropore *** simple structure and commercial availability of DEAP endow this synthesis with a cost advantage over the conventional preparation of UOS zeolite,where an expensive imidazolium derivative is employed.

关键词： UOS zeolite Organic structure-directing agent Hydrothermal synthesis Physicochemical property

Adsorbate-driven dynamic active sites in stannosilicate zeolites

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Fundamental research 2025年第1期5卷 174-182页

作者： Yi, Xianfeng Xiao, Yao Xia, Changjiu Liu, Fengqing Liu, Yujia Hui, Yu Yu, Xin Qin, Yucai Chen, Wei Liu, Zhiqiang Song, Lijuan Zheng, Anmin State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics National Center for Magnetic Resonance in Wuhan Wuhan Institute of Physics and Mathematics Innovation Academy for Precision Measurement Science and Technology Chinese Academy of Sciences Wuhan 430071 China University of Chinese Academy of Sciences Beijing 100049 China State Key Laboratory of Catalytic Materials and Reaction Engineering Research Institute of Petroleum Processing SINOPEC Beijing 100083 China Key Laboratory of petrochemical Catalytic Science and Technology Liaoning Petrochemical University Fushun 113001 China

Elucidating the nature of the active sites in heterogeneous catalysts is fundamental for understanding their reactivity and catalytic performances. Although stannosilicate zeolites have tremendous application potential for catalyzing biomass-related compounds in aqueous media, the detailed local structures and features of the real active sites and their possible structural variations under reaction conditions are poorly understood to date. In this study, a dynamic transformation of framework Sn−O−Si sites to Sn−OH/Si−OH pairs and subsequently a pseudo-Brønsted acid in stannosilicate zeolites upon molecular adsorption, which is analogous to various adsorbates/reactants under working conditions, was identified by solid-state nuclear magnetic resonance (NMR) spectroscopy for the first time, which challenges the widespread assumption that the active center structures remain rigid/stable during the catalytic process. These results provide new comprehensive insights for the fundamental understanding of the dynamic and flexible active centers and involved reaction mechanisms of novel zeolite catalysts with heterometal atoms, such as Sn, Ti, and Zr. © 2023

关键词： Dynamic active sites Pseudo-Brønsted acid Reaction conditions Solid-state NMR Stannosilicate zeolites

Design and Application of Turbine Cascade Partitioned Endwall Profiling

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Journal of Thermal Science 2025年第1期34卷 110-128页

作者： ZENG Fei JIANG Ruiqi XUE Xingxu DU Wei LUO Lei ZHOU Xun AECC Hunan Aviation Powerplant research institute Zhuzhou 412002China School of Energy Science and Technology Harbin Institute of TechnologyHarbin 150001China Science and Technology on Diesel Engine Turbocharging Laboratory China North Engine Research InstituteTianjin 300270China

The influence of partitioned profiling design based on a large-pitch highly loaded cascade is studied by numerical *** partitioned profile is mainly composed of a pressure-side convex structure near the leading edge and a suction-side convex structure at the midstream and downstream sides of the *** influence of the change in the vertex axial position and peak value of the B-line on the secondary flow control is *** this paper,air(ideal gas)is selected as the flow *** average static pressure at the outlet and the average total temperature at the inlet are kept *** γ-θ is used as the turbulence *** results show that the pressure-side convex structure suppresses the spanwise and pitchwise migration of the inlet flow by adjusting the static pressure distribution of the flow field,so the development of the pressure-side leg of the horseshoe vortex is effectively *** suction-side convex structure adjusts the static pressure distribution of the flow field and increases the included angle between the cross-flow and suction surface,so the accumulation of low-momentum fluid,the development of a corner vortex and the flow separation at the trailing edge of the suction-side surface are all suppressed near the endwall-suction ***,the energy loss coefficient of the large-pitch highly loaded cascade is decreased from 0.0564 to 0.0485,representing a 25% reduction in secondary flow losses.

关键词： large-pitch highly loaded cascade highly loaded design non-axisymmetrical endwall design secondary flow control partitioned endwall profiling

Tackling the microlensing wave effects of strong lensing gravitational waves with TAAH

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Science China(Physics,Mechanics & Astronomy) 2025年第1期68卷 253-254页

作者： Zuhui Fan South-Western institute for Astronomy research Yunnan UniversityKunming 650500China

The rapid development of gravitational wave(GW) observations since their first detection in 2015 [1] has opened a completely new window for exploring the Universe. Consequently, astronomical research has entered the multimessenger era, allowing us to use different tracers to view the cosmos from various perspectives. Among others, the appealing application of gravitational wave events from compact binary mergers is that they can act as standard sirens to determine absolute cosmic distances entirely independent of standard candles. This approach is one of the most promising means to solve the current H0tension problem.

关键词： problem. app wave

Higher abundance of DLD protein in buffalobull spermatozoa causes elevated ROSproduction leading to early sperm capacitationand reduction in fertilizing ability

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Journal of Animal Science and Biotechnology 2025年第1期16卷 107-120页

作者： Seema Karanwal Ankit Pal Fanny Josan Aditya Patel Jatinder Singh Chera Sonam Yadav Vikrant Gaur Preeti Verma Shiva Badrhan Vitika Chauhan Mukesh Bhakat Tirtha Kumar Datta Rakesh Kumar Animal Genomics Laboratory Animal Biotechnology DivisionICAR-National Dairy Research InstituteKarnalHaryanaIndia NBGC Laboratory National Bureau of Animal Genetics ResourcesKarnalHaryanaIndia Artificial Breeding research Centre LPM DivisionICAR-National Dairy Research InstituteKarnalHaryanaIndia ICAR-Central institute of research On Goat MakhdoomMathuraUttar PradeshIndia ICAR-Central institute for research On Buffaloes HisarHaryanaIndia

Backgroud Before fertilization,spermatozoa undergo a crucial maturation step called capacitation,which is a unique event regulates the sperm’s ability for successful *** capacitation process takes place as the spermatozoa pass through the female reproductive tract(FRT).Dihydrolipoamide dehydrogenase(DLD)protein is a post-pyruvate metabolic enzyme,exhibiting reactive oxygen species(ROS)production which causes ***,other vital functions of DLD in buffalo spermatozoa are hyperactivation and acrosome *** produces the optimum amount of ROS required to induce capacitation process in *** on physiological or patho-physiological conditions,DLD can either enhance or attenuate the production of reactive oxygen species(ROS).Aim of this study was to investigate whether changes in the production of ROS in sperm cells can impact their ability to fertilize by triggering the capacitation and acrosome *** In this study,abundance of DLD protein was quantified between high(n=5)and low fertile bull(n=5)*** was found that compared to high-fertile(HF)bulls,low-fertile(LF)bulls exhibited significantly(P<0.05)higher DLD ***,we optimised the MICA concentration to inhibit DLD function,spermatozoa were treated with MICA in time(0,1,2,3,4,and 5 h)and concentrations(1,2.5,5,and 10 mmol/L)dependent *** DLD inhibition was found to be at 4 h in 10 mmol/L MICA concentration,which was used for further exper-imentation in HF and *** on DLD inhibition it was seen that LF bull spermatozoa exhibited significantly(P<0.05)higher ROS production and acrosome reaction in comparison to the HF bull *** kinematic parameters of the spermatozoa such as percent total motility,velocity parameters(VCL,VSL,and VAP)and other parameters(BCF,STR,and LIN)were also decreased in MICA treated spermatozoa in comparison to the control(capacitated)*** The present study provides an initial

关键词： Acrosome reaction Capacitation High fertile bull Low fertile bull Protein Reactive oxygen species Spermatozoa