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Adsorption of typical NDmA precursors by superfine powdered activated carbon:critical role of particle size reduction

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Journal of Environmental Sciences 2025年第1期147卷 101-113页

作者： Ying wang Zhichen Zhang Zhihang Yin Jun wang Xiaojian Zhang chao chen State Key Joint Laboratory of Environmental Simulation and Pollution control School of EnvironmentTsinghua UniversityBeijing 100084China Research Institute for Environmental Innovation(Suzhou) TsinghuaSuzhou 215163China

control of N-nitrosodimethylamine(NDmA)in drinking water could be achieved by removing its precursors as one practical ***,superfine powdered activated carbons with a diameter of about 1μm(SPAcs)were successfully prepared by grinding powdered activated carbon(PAc,D50=24.3μm)and applied to remove model NDmA precursors,***(RAN)and nizatidine(NIZ).Results fromgrain diameter experiments demonstrated that the absorption velocity increased dramatically with decreasing particle size,and the maximum increase in k2 was 26.8-folds for RAN and 33.4-folds for ***,kinetic experiments explained that rapid absorption could be attributed to the acceleration of intraparticle diffusion due to the shortening of the diffusion ***,performance comparison experiments suggested that the removal of RAN and NIZ(c_(0)=0.5 mg/L)could reach 61.3%and 60%,respectively,within 5 min,when the dosage of SAPc-1.1(D_(50)=1.1μm)was merely 5 mg/L,while PAc-24.3 could only eliminate 17.5%and 18.6%.The adsorption isotherm was well defined by Langmuir isotherm model,indicating that the adsorption of RAN/NIZ was a monolayer coverage *** adsorption of RAN or NIZ by SAPc-1.1 and PAc-24.3 was strongly pH dependent,and high adsorption capacity could be observed under the condition of pH>pk_(a)+*** coexistence of humic acid(HA)had no significant effect on the adsorption performance because RAN/NIZ may be coupled with HA and removed *** coexistence of anions had little effect on the adsorption *** study is expected to provide an alternative strategy for drinking water safety triggered by NDmA.

关键词： Adsorption NDmA Kinetics Superfine powdered activated carbon Intraparticle diffusion Drinking water

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mercury contents and potential exposure risk of rice-containing food products

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Journal of Environmental Sciences 2025年第2期148卷 683-690页

作者： Xin wang Yingjun wang Yaqi Zhang Ziyan Liu Xiaomeng Ji Yong cai Shandong Key Laboratory of Environmental Processes and Health School of Environmental Science and EngineeringShandong UniversityQingdao 266237China Department of chemistry&Biochemistry Florida International UniversityMiamiFL 33199USA

mercury(Hg),especially methylmercury(meHg),accumulation in rice grain due to rice paddy possessing conditions conducive to Hg methylation has led to human Hg exposure through consumption of rice-based daily *** addition to being a food staple,rice is widely used as a raw material to produce a vast variety of processed food *** is known about Hg levels in snacking rice-food products and potential Hg exposure from consumption of them,besides previous studies on infant rice *** to provide complementary information for a more complete assessment on Hg exposure risk originated from Hgcontaining rice,this study determined total Hg(THg)and meHg levels in 195 rice-containing and rice-free processed food products covering all major types of snack foods marketed in china and the estimated daily intake(EDI)of dietary Hg from the consumption of these *** results clearly showed THg and meHg contents in rice-containing foods were significantly higher than rice-free products,suggesting the transfer of Hg and meHg from the rice to the end products,even after manufacturing ***,significant positive correlations were observed between THg,meHg,or meHg/THg ratio and rice content for samples containing multiple grains as ingredients,further indicating the deciding role of rice for Hg levels in the end food *** the EDI of THg and meHg via ricebased food products were relatively low compared to the reference dose,it should be considered these snacking food products would contribute additive Hg intake outside of the daily regular meals.

关键词： mercury methylmercury Processed food products Rice Dietary exposure

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Spatiotemporal evolution of wildfire activity during the Paleocene-Eocene Thermal maximum in china

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Science china Earth Sciences 2025年第2期68卷 509-522页

作者： Xue-Ting wang Zuoling cHEN Linlin cUI Xu wang State Key Laboratory of Lithospheric and Environmental coevolution Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China University of chinese Academy of Sciences College of Earth and Planetary SciencesBeijing 100049China Institute of Geology and Geophysics Chinese Academy of SciencesBeijing 100029China

The Paleocene-Eocene Thermal maximum(PETm)was the most prominent warming event in the cenozoic and serves as a geological analog for the current global warming driven by anthropogenic cO_(2)emissions from burning fossil *** a primary disruptor of Earth's ecosystems,wildfire activity affects the balance of ecosystems,the global carbon cycle,and climate ***,studying the evolution and driving mechanisms of wildfires during the PETm is essential for predicting wildfire activity under global warming scenarios and for understanding the carbon cycle in the context of wildfire *** research on wildfires during the PETm has mainly focused on the Northern Hemisphere,particularly Europe and North America,whereas studies on chinese mainland remain *** this study,we analyzed black carbon(Bc)concentration and carbon isotope(δ13c)in the Beigou section of the Nanyang Basin and the Xilutian section of the Fushun Basin to reconstruct the spatiotemporal evolution of wildfires in arid/semi-arid and humid *** integrated these findings with those of previous studies on the paleoclimate of the research area to elucidate the driving mechanisms behind wildfire *** results indicate that wildfire activity weakened at the onset of the PETm,with the negative carbon isotope period characterized by low wildfire activity,except for a brief resurgence in the Nanyang *** the recovery phase of the PETm,wildfire activity gradually increased,returning to the pre-PETm *** prolonged low wildfire state was likely caused by extremely high temperatures and precipitation as well as the resulting vegetation *** the PETm recovery phase,increased wildfire activity transformed“short-term carbon sinks”of the biological-atmospheric carbon cycle into“long-term carbon sinks”through the burial of *** process of carbon sink conversion may have acted as a negative feedback mechanism,contributing to carbon sequestration and the e

关键词： PETm Wildfire carbon cycle Nanyang Basin Fushun Basin

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A molecular dynamics simulation route towards Eu-doped multi-component transparent spectral conversion glass-ceramics

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Journal of Rare Earths 2025年第1期43卷 146-152,I0006页

作者： Xiuxia Xu chenhao wang Di wang Wenyan Zheng Zhiyu Liu Jincheng Du Xusheng Qiao Xianping Fan Zhiyu wang Guodong Qian State Key Laboratory of Silicon materials School of Materials Science and EngineeringZhejiang UniversityHangzhou310027China State Key Laboratory of Silicon materials MOE Key Laboratory of Macromolecular Synthesis and FunctionalizationDepartment of Polymer Science and EngineeringZhejiang UniversityHangzhou310027China Department of materials Science and Engineering University of North TexasDentonTX76203-5017USA

Eu^(2+)doped fluorosilicate glass-ceramics containing BaF_(2) nanocrystals have high potential as spectral conversion materials for organic solar ***,it is difficult to realize the efficient design of BaF_(2):Eu^(2+)doped fluorosilicate glass and to vividly observe the glass microstructure in experiment through traditional trial-and-error glass preparation ***_(2):Eu^(2+)doped fluorosilicate glassceramics with high transparency,and high photoluminescence(PL)performance were predicted,designed and prepared via molecular dynamics(mD)simulation *** mD simulation prediction,self-organized nanocrystallization was realized to inhibit the abnormal growth of nanocrystals due to[AlO_(4)]tetrahedra formed in the fluoride-oxide *** introduction of NaF reduces the effective phonon energy of the glass because Na+will prompt Al^(3+)to migrate from the fluoride phase to the silicate phase and *** local environment of Eu^(2+)is optimized by predicting the doping concentration of EuF_(3) and 2 mol%EuF3 is the best concentration in this ***-ceramics sample Gc2Eu as spectral conversion layer was successfully applied on organic solar cells to obtain more available visible phonons with a high photoelectric conversion efficiency(PcE).This work confirms the guidance of molecular dynamics simulation methods for fluorosilicate glasses design.

关键词： molecular dynamics simulation Fluorosilicateglass Spectral conversion Organic solarcell Rareearths

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Efficient activation of peroxymonosulfate for catalytic degradation of organic pollutants by simultaneously using low-level cobalt ions and calcium carbonate micro-particles

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Journal of Environmental Sciences 2025年第5期151卷 113-124页

作者： Yu Zhou Xiaobo wang Nan wang Shuangshuang Huang Lihua Zhu college of chemistry and chemical Engineering Huazhong University of Science and TechnologyWuhan 430074China college of chemistry and chemical Engineering Hubei Polytechnic UniversityHuangshi 435003China college of chemistry and Environmental Engineering Wuhan Polytechnic UniversityWuhan 430023China School of Physics and Technology Center for Electron MicroscopyWuhan UniversityWuhan 430072China

An efficient catalytic system was developed to remove various organic pollutants by simultaneously using low-level cobalt ions,calcium carbonate micro-particles and peroxymonosulfate(PmS).A simple base-induced precipitation was used to successfully loaded co-centered reactive sites onto the surface of cacO_(3)*** optimal conditions at 25°c,10 mg/L methylene blue(mB)could be completely degraded within 10 min with 480μg/L co^(2+),0.4 g/L cacO_(3)microparticles(or 0.4 g/L co@cacO_(3))and 0.1 g/L *** mB degradation followed the pseudo first order kinetics with a rate constant of 0.583 min^(−1),being 8.3,11.5 and 53.0 times that by using co-OH(0.07 min^(−1)),co^(2+)(0.044 min^(−1))and cacO_(3)(0.011 min^(−1))as the catalyst,*** was confirmed that there was a synergistic effect in the catalytic activity between co species and the cacO_(3)particles but the major contributor was the highly dispersed co *** co^(2+)-containing simulated electroplating wastewater was used as the co^(2+)source,not only the added mB was also completely degraded within 5 min in this catalytic system,but also the coexisting heavy metal ions were substantially *** presently developed method was applied to simultaneously treat organic wastewater and heavy metals *** present method was also successfully used to efficiently degrade other organic pollutants including bisphenol A,sulfamethoxazole,rhodamine B,tetrabromobisphenol A,ofloxacin and benzoic acid.A catalytic mechanism was proposed for the PmS activation by co@cacO_(3).The surface of cacO_(3)particles favors the adsorption of co^(2+).more importantly,the surface of cacO_(3)particles provides plentiful surface-OH and-cO_(3)^(2+),and these surface groups complex with co^(2+)to producemore catalytically active species such as surface[coOH]^(−),resulting in rapid co^(2+)/co^(3+)cycling and electron *** interactions cause the observed synergistic effect between co species and ca

关键词： cacO3 Low-level cobalt Peroxymonosulfate Oxidative degradation

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Synthesis of ordered mesoporous crystalline boron phosphate scaffold with double diamond surface structure

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Science china chemistry 2025年第2期68卷 590-600页

作者： chao wang Wen-Duo Lu Jiao wang Shunai che An-Hui Lu Lu Han School of chemical Science and Engineering Tongji UniversityShanghai 200092China State Key Laboratory of Fine chemicals Liaoning Key Laboratory for Catalytic Conversion of Carbon ResourcesSchool of Chemical EngineeringDalian University of TechnologyDalian 116024China School of chemistry and chemical Engineering Frontiers Science Center for Transformative MoleculesState Key Laboratory of Metal Matrix CompositesShanghai Key Laboratory for Molecular Engineering of Chiral DrugsShanghai Jiao Tong UniversityShanghai 200240China

Ordered mesoporous materials have received great attention due to their well-defined pore structures and potential applications in catalysis,adsorption,separation,drug delivery,*** various compositions of mesoporous solids have been successfully prepared,the preparation of crystalline non-metallic oxyacid salts with ordered mesoporosity remains a major ***,we report the synthesis of a mesoporous solid acid crystalline boron phosphate(BPO_(4))catalyst with a bicontinuous shifted double diamond(SDD)hyperbolic surface *** BPO_(4) scaffold was obtained by synergistic selfassembly in a mixed solvent of water and tetrahydrofuran using the diblock copolymer poly(ethylene oxide)-block-polystyrene as template and phosphoric acid and orthoboric acid as inorganic *** structure consists of two sets of diamond networks adjacent to each other with a mesostructural scale tetragonal symmetry(space group I4_(1)/amd)with unit cell parameters of a=80 nm and c=113 nm,which affords the scaffold a specific surface area of 44 m^(2)/*** a solid acid catalytic material,the SDD BPO_(4) scaffold exhibited excellent catalytic activity at room temperature with a conversion of furfural to 2-(dimethoxymethyl)furan over 70%and can be reused after recovery without serious loss of *** the propane oxidative dehydrogenation reaction,SDD BPO_(4) demonstrated high olefin productivity and selectivity while maintaining high reaction *** study provides ideas for the preparation of ordered mesoporous crystalline catalytic materials and demonstrates their potential for practical applications.

关键词： boron phosphate mesoporous material self-assembly block copolymer catalyst

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End-to-end dataflow engineering framework of honey manufacturing from intermediates to process by TAS1R2@AuNPs/SPcE biosensor coupled with quality transfer principle

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Fundamental Research 2025年第1期5卷 407-418页

作者： Xiaoyan Hu Jingqi Zeng Lijuan m Xiaomeng wang Jing Du Lu Yao Zhisheng Wu Fujian University of Traditional chinese medicine Fuzhou 350122China Engineering Research center for Pharmaceutics of chinese materia medica and New Drug Development Ministry of EducationBeijing 100102China Beijing University of chinese medicine Beijing 100102China china Beijing Tongrentang Group co. Ltd.Beijing 100062China

This study reported an original end-to-end dataflow engineering framework for the quality transfer principle to overcome the quality challenges in real-world honey ***,650 pivotal data points of physical and chemical quality attributes from 65 batches of honey intermediates were characterized through multiple sensors,which included rheological properties,acidity,moisture,and ***,a hypersensitized TAS1R2@AuNPs/SPcE biosensor was developed to identify biological quality attributes of honey,the powerful affinities between honey intermediates and the TAS1R2 receptor were discovered(KDm),and the abnormal batches of B2,B23 and c23 were diagnosed by TAS1R2@AuNPs/SPcE biosensor and multivariable ***,the end-to-end dataflow containing physical,chemical and biological critical quality attributes was successfully established to interpret the quality transfer principle of honey manufacturing,which revealed that the front-end refining process was relatively unstable and the back-end refining process was a negligible influence on the quality of honey *** framework embraces quality management,quality transfer,and biosensor information,which will contribute to discovering the quality transfer principle in industrial innovation for intelligent manufacturing.

关键词： End-to-end dataflow Quality transfer principle critical quality attributes Biosensor Honey manufacturing

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Arsenic exposure and oxidative damage to lipid,DNA,and protein among general chinese adults:A repeated-measures cross-sectional and longitudinal study

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Journal of Environmental Sciences 2025年第1期147卷 382-391页

作者： Yongfang Zhang min Zhou Dongming wang Ruyi Liang Wei Liu Bin wang Weihong chen Department of Occupational and Environmental Health School of Public HealthTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030China Key Laboratory of Environment and Health Ministry of Education and Ministry of Environmental Protectionand State Key Laboratory of Environmental Health(Incubating)School of Public HealthTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030China

Arsenic-related oxidative stress and resultant diseases have attracted global concern,while longitudinal studies are *** assess the relationship between arsenic exposure and systemic oxidative damage,we performed two repeatedmeasures among 5236 observations(4067 participants)in theWuhan-Zhuhai cohort at the baseline and follow-up after 3 *** total arsenic,biomarkers of DNA oxidative damage(8-hydroxy-2-deoxyguanosine(8-OHdG)),lipid peroxidation(8-isoprostaglandin F2alpha(8-isoPGF2α)),and protein oxidative damage(protein carbonyls(PcO))were detected for all *** we used linearmixed models to estimate the cross-sectional and longitudinal associations between arsenic exposure and oxidative ***-response curves were constructed by utilizing the generalized additive mixed models with thin plate *** adjusting for potential confounders,arsenic level was significantly and positively related to the levels of global oxidative damage and their annual increased rates in dose-response *** cross-sectional analyses,each 1%increase in arsenic levelwas associated with a 0.406%(95%confidence interval(cI):0.379%to 0.433%),0.360%(0.301%to 0.420%),and 0.079%(0.055%to 0.103%)increase in 8-isoPGF2α,8-OHdG,and PcO,*** importantly,arsenic was further found to be associated with increased annual change rates of 8-isoPGF2α(β:0.147;95%cI:0.130 to 0.164),8-OHdG(0.155;0.118 to 0.192),and PcO(0.050;0.035 to 0.064)in the longitudinal *** study suggested that arsenic exposurewas not only positively related with global oxidative damage to lipid,DNA,and protein in cross-sectional analyses,but also associated with annual increased rates of these biomarkers in dose-dependent manners.

关键词： Arsenic Oxidative stress Oxidative damage 8-isoPGF2α 8-OHdG Protein carbonyls(PcO)

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Radical dehydroxymethylative fluorination of aliphatic primary alcohols and diverse functionalization ofα-fluoroimides via BF_(3)·OEt_(2)-catalyzed c-F bond activation

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chinese chemical Letters 2025年第1期36卷 239-243页

作者： Peng wang Jianjun wang Ni Song Xin Zhou ming Li molecular Synthesis center Key Laboratory of Marine MedicineChinese Ministry of EducationSchool of Medicine and PharmacyOcean University of ChinaQingdao 266003China Laboratory for marine Drugs and Bioproducts Pilot National Laboratory for Marine Science and TechnologyQingdao 266237China

Ag_(2)cO_(3)-promoted dehydroxymethylative fluorination of aliphatic alcohols has been achieved with Selectfluor as both oxidant and fluorine *** reaction involvesβ-fragmentation of primary alkoxy radicals,followed by the fluorination of the resulting c-centered radical *** transformation proceeds under mild reaction conditions and exhibits a broad substrate scope,thus opening up a new entrance to the synthesis of fluorinated constructs includingα-fluoroimides and 1-fluoroalkyl benzoates as well as secondary and tertiary alkyl fluorides like versatile 2-fluoro-2-alkyl 1,3-propandiol *** divergent functionalization of the obtainedα-fluoroimides enables an efficient access to amine derivatives through c-F bond activation under the action of BF_(3)·OEt_(2).

关键词： Dehydroxymethylative fluorination Alkoxy radicals β-Fragmentation Silver catalysis c-F Bond activation

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Surface element design of nanomaterials considering surface curvature dependence

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Acta mechanica Sinica 2025年第1期41卷 42-53页

作者： Yongchao Zhang Lian wang Fangxin wang Bin Li Xiaofan Gou college of mechanics and materials Hohai UniversityNanjing 211100China college of Architectural Science and Engineering Yangzhou UniversityYangzhou 225127China School of mechanics and Photoelectric Physics Anhui University of Science and TechnologyHuainan 232001China

Nanomaterials have garnered recognition for their notable surface effects and demonstration of superior mechanical *** studies on the surface effects of nanomaterials,employing the finite element method,often relied on simplified twodimensional models due to theoretical ***,these simplified models inadequately represent the mechanical properties of nanomaterials and fail to capture the substantial impact of surface effects,particularly the curvature dependence of *** study applies the principle of minimum energy and leverages the Steigmann-Ogden surface theory of nanomaterials to formulate a novel finite element surface element that comprehensively accounts for surface *** conducted an analysis of the stress distribution and deformation characteristics of four typical 2D and 3D nanomaterial *** accuracy of the developed surface element and finite element calculation method was verified through comparison with established *** resulting finite element model provides a robust and compelling scientific approach for accurately predicting the mechanical performance of nanomaterials.

关键词： Nanomaterials Surface effect Surface element curvature dependence Finite element method

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