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Journal of Rare Earths 2025年第1期43卷 73-80,I0003页

作者： Xiao Man Ying Chang Shaohong Guo Meilin Jia Jingchun Jia Inner Mongolia Key Laboratory of Green Catalysis and Inner Mongolia Collaborative Innovation Center for Water environment Safety College of Chemistry and Environmental ScienceInner Mongolia Normal UniversityHohhot010022China

The development of an e fficacious and easily prepared no nprecious metal electrocatalyst is crucial for the oxygen reduction reaction(ORR).This work used a dual template method to prepare the amorphous rare earth-based catalyst PrO_(x)-NC,and optimized the calcination temperature and *** PrO_(x)-NC-900 catalyst has high durability and activity and exhibits superior ORR performance in alkaline electrolytes with an onset potential(E_(0))of 0.96 V and a half-wave potential(E_(1/2))of 0.85 *** research results indicate that the ORR performance of rare earth oxide composite carbon catalysts can be improved by adjusting oxygen vacancies(Ov).In addition,high specific surface area,N rich defect *** oxygen vacancies,and the synergistic effect of oxygen vacancies and N-doped carbon interfacial layer play a significant part in the enhancement of *** performance of the zinc air battery assembled with PrO_(x)-NC-900 is significantly improved,and rare earth oxides and carbon frameworks originating from metal organic frameworks(MOFs)contribute to the oxygen electrocatalyst and electron transfer rate of the zinc air *** catalyst provides promising information for the development of rare earth metal oxide nanostructures as potential candidate materials for ORR in alkaline media.

关键词： Rare earths Metal-organic framework Oxygen reduction reaction Zn-air batteries

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Toxicity variability in Alexandrium pacificum isolated from East China Sea:impact of temperature and light intensity

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Journal of Oceanology and Limnology 2025年第1期43卷 147-158页

作者： Xuexia ZHU Tianchi YIN Min PANG Jun WANG The First Institute of Oceanography Ministry of Natural Resources of the People’s Republic of ChinaQingdao 266061China college of Animal science and Technology Yangzhou UniversityYangzhou 225009China college of Oceanography Hohai UniversityNanjing 210098China

Suitable temperature and light intensity play important roles in the formation of harmful algae blooms(HABs),which can pose serious threats to aquatic ecosystems and human *** this study,we measured the growth,physiological function,and paralytic shellfish toxins(PSTs)production of Alexandrium pacificum(CCMA-272),a strain isolated from East China Sea,at different temperatures(15,20,and 25℃)and light intensities(30,60,and 90μmol photons/(m^(2)·s)).Results indicate that temperature and light intensity significantly affected the growth,physiology,and toxigenic potentials of *** optimal conditions for the growth of *** were observed at 20℃ under60μmol photons/(m^(2)·s).Regarding the production of PSTs,this strain of *** produced 12 PSTs,including carbamate toxins:saxitoxin(STX),neosaxitoxin(NEO),and gonyautoxin 1–4(GTX1,GTX2,GTX3,GTX4);dicarbamoyl toxins:dicarbamoylsaxitoxin(dcSTX),dicarbamoylgonyautoxin 2,3(dcGTX2,dcGTX3);and N-sulfocarbamoyl toxins:N-sulfocarbamoylgonyautoxin 1,2(C1,C2),and gonyautoxin 5(GTX5).Among all the PSTs,C2 was the most *** temperature(15℃)and high light intensity(90μmol photons/(m^(2)·s))were beneficial for the production of PSTs in *** cultured at 20 and 25℃,*** generated comparable total quantities of PSTs,yet the toxicity levels were lower at 25℃.Intra-cellular PSTs contents were greater than extra-cellular PSTs contents,except those under the condition of 25℃ with 30μmol photons/(m^(2)·s).However,as the increase of temperature,*** released more amounts of analogues with higher toxicity levels(e.g.,STX and dcGTX_(2))into the environment than *** findings emphasize the significant sensitivity of *** to temperature and light intensity,highlighting the importance of evaluating both intra-cellular and extra-cellular PSTs for assessing its toxicity and aiding in the prediction and management of HABs.

关键词： temperature light intensity Alexandrium pacificum paralytic shellfish toxin harmful algal bloom

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Effects of Soil Acidification on the Distribution and Availability of Arsenic in Aggregates

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Huanjing Kexue/environmental science 2025年第3期46卷 1762-1773页

作者： Xiao, Sheng-Bai Xu, Yan Tang, Shu-Ting Cui, Hao Wei, Shi-Qiang college of resources and environment Southwest University Chongqing400700 China Chongqing Key Laboratory of Agricultural resources and environment Research Chongqing400700 China

The spatiotemporal substitution method was used to collect yellow soil and purple soil with different acidification degrees;analyze the effects of acidification on the composition and properties of soil aggregates;explore the distribution characteristics，occurrence forms，and availability of arsenic（As）in soil aggregates with different acidification degrees;and reveal the key factors restricting the availability of soil As. The results showed that the distribution of total As in each aggregate was positively affected by its mass fraction，and the larger the mass fraction，the more the total As distribution. Soil acidification destroyed the aggregate structure，reduced the mass fraction of large aggregate S1（>2 mm）by 5 to 15 percentage points，led to the increase in amorphous iron content by 2 to 7 times，and decreased the total As distribution of S1. The available As was positively regulated by non-obligate/obligate adsorptive arsenic（F1，F2）（F1+F2 correlation coefficient 0.76）and negatively affected by residual arsenic（F5）（correlation coefficient −0.89）. Soil acidification significantly reduced the ratio of F1 to F2 after exogenous As entered the soil，resulting in a decrease in ω（available As）from 6.71-15.37 mg·kg−1 to 2.36-9.26 mg·kg−1，and the highest exogenous available As content was found in S1 and microaggregate S4（ © 2025 science Press. All rights reserved.

关键词： Aggregates

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Deuterated chloroform replaces ultra-dry chloroform to achieve high-efficient organic solar cells

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Chinese Chemical Letters 2025年第1期36卷 369-373页

作者： Zhiyang Zhang Yi Chen Yingnan Zhang Chuanlang Zhan Key Laboratory of Advanced Materials Chemistry and Devices(AMCDLab)of the Department of Education of Inner Mongolia Autonomous Region College of Chemistry and Environment ScienceInner Mongolia Normal UniversityHuhehot 010022China

Chloroform is a common and excellent solvent for preparing high-efficient organic solar cells(OSCs),however,it is toxic and poisonable *** comparisons,deuterated chloroform(DC)is less toxic and costly,and particularly,it is non-poisonable *** this paper,we use DC to replace ultra-dry chloroform(UC)as the processing solvent for preparation of active layers of organic solar ***,we selected PM6:BTP-e C9 as the basic binary and counted 100 solar cells'data,from which comparable device performance were obtained with use of DC and ***,DC showed better reproducibility,superior storage under a nitrogen atmosphere and a little better performance than *** DC and UC gave rise of comparable hole and electron mobilities and similar charge recombination ***,we based PM6:Y6 and D18-Cl:Y6 as the binaries and similar effects were obtained from both UC and DC when counting 30 devices for each ***,the universality of the use of DC for preparing highefficient OSCs were again checked with several binary and ternary *** all,this study demonstrate that DC can replace UC for use in the field of OSCs.

关键词： Organic solar cell Processing solvent Deuterated chloroform Ultra-dry chloroform Active layer

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A comparison of the proto-dolomite induced by cyanobacteria and halophilic bacteria:implications for dolomite-inducing microbe identification

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Journal of Palaeogeography 2025年第01期14卷 277-290页

作者：赵延洋 Xiang-Yu Wei Xiao Gao Na Guo Jie Li Kai-Ming Hu Chao Han Qi-Yu Wang 韩作振 Shandong Provincial Key Laboratory of Depositional Mineralization and Sedimentary Minerals College of Earth Science and Engineering Shandong University of Science and Technology Laboratory for Marine Mineral resources Qingdao National Laboratory for Marine Science and Technology Key Laboratory of Sedimentary Basin and Oil and Gas resources Ministry of Natural Resources Key Laboratory of Deep Oil and Gas China University of Petroleum

This study investigates the morphological and mineralogical characteristics of proto-dolomite induced by two specific microorganisms with varying lifestyles:the extremely halophilic bacterium Vibrio harveyi QPL2 and the cyanobacterium Leptolyngbya boryana. Halophilic bacterially-induced proto-dolomite(HBD) and cyanobacterially-induced proto-dolomite (CBD) were subjected to comprehensive characterization techniques, including X-ray diffraction, scanning electron microscopy, Focused Ion Beam, thermogravimetric analysis, and X-ray photoelectron spectroscopy. The results indicate that both HBD and CBD exhibit a low degree of crystallinity and possess comparable molar ratios of MgCO3to CaCO3. Moreover, neither of them exhibits the ordered structure of ideal dolomite. HBD and CBD exhibit notable distinctions in external morphology and internal structure. HBD forms a subunit aggregate with a less dense surface and numerous pinhole structures resulting from bacterial survival. In contrast, CBD adopts a bispherical shape with a relatively dense surface and minimal indications of cyanobacterial survival. Both HBD and CBD have an internal hollow structure. However, HBD is characterized by sparse population and loosely arranged subunits, while CBD features only a central cavity. Additionally, HBD particles are smaller compared to CBD particles. These morphological differences suggest that HBD primarily grows through bacterial surface-dependent processes,whereas the growth of CBD is not directly reliant on the surface of cyanobacteria. Compositionally, the weightpercentage of crystalline water in CBD exceeded that of HBD with a value of 29.42%compared to 5.9%. This increase in internal crystalline water enables a faster conversion of CBD to the ordered ideal dolomite in a specific diagenetic environment. This study implies that the morphology and composition of microbial protodolomite may aid in identifying the type of dolomite-inducing microbes.

关键词： Proto-dolomite Cyanobacteria Halophile Crystal morphology Water of crystallization

Rainfall impacts on nonpoint nitrogen and phosphorus dynamics in an agricultural river in subtropical montane reservoir region of southeast China

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Journal of environmental sciences 2025年第3期149卷 551-563页

作者： Yuanyi Wang Hai Xu Xingchen Zhao Lijuan Kang Yu Qiu Hans Paerl Guangwei Zhu Huiyun Li Mengyuan Zhu Boqiang Qin Yunlin Zhang Mingliang Liu Key Laboratory of Lake and Watershed science for Water Security Nanjing Institute of Geography&LimnologyChinese Academy of SciencesNanjing 210008China college of resources and environment University of Chinese Academy of SciencesBeijing 100049China School of Geography and Ocean science Nanjing UniversityNanjing 210023China Institute of Marine sciences University of North Carolina at Chapel HillNC 28557USA Hangzhou Institute of Ecological and environmental sciences Hangzhou 310005China

The increased frequency and intensity of heavy rainfall events due to climate change could potentially influence the movement of nutrients from land-based regions into recipient ***,little information is available on how the rainfall affect nutrient dynamics in subtropicalmontane rivers with complex land *** study conducted high-frequency monitoring to study the effects of rainfall on nutrients dynamics in an agricultural river draining to Lake Qiandaohu,a montane reservoir of southeast *** results showed that riverine total nitrogen(TN)and total phosphorus(TP)concentrations increased continuously with increasing rainfall intensity,while TN:TP *** heavy rainfall and rainstorm drove more than 30%of the annual N and P loading in only 5.20%of the total rainfall period,indicating that increased storm runoff is likely to exacerbate eutrophication in montane ***_(3)^(−)-N is the primary nitrogen form lost,while particulate phosphorus(PP)dominated phosphorus *** source of N is cropland,and themain source of P is residential ***,forestedwatersheds have better drainage quality,while it is still a potential source of nonpoint pollution during rainfall *** and TP concentrations were significantly higher at sites dominated by cropland and residential area,indicating their substantial contributions to deteriorating river water ***,TN and TP concentrations reached high values in May-August when rainfall was most intense,while they were lower in autumn and winter than that in spring and summer under the same rainfall *** results emphasize the influence of rainfall-runoff and land use on dynamics of riverine N and P loads,providing guidance for nutrient load reduction planning for Lake Qiandaohu.

关键词： Non-point source pollution Rainfall events Land use type Mountain area Deepwater reservoir

Investigation into enhanced performance of toluene and Hg0 stimulative abatement over Cr-Mn oxides co-modified columnar activated coke

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Journal of environmental sciences 2025年第2期148卷 88-106页

作者： Jiajie Wang Jie Liu Lei Gao Dong Xie Caiting Li Liping Xiang Huiyu Xiong Jiaqi Xie Tianren Zhang Yueguo Pan School of resources environment and Safety Engineering University of South ChinaHengyang 421001China National&Local Joint Engineering Research Center for Airborne Pollutants Control and Radioactivity Protection in Buildings Hengyang 421001China Key Laboratory of Prefabricated Building Energy Saving Technology of Hunan Province Hengyang 421001China college of environmental science and Engineering Hunan UniversityChangsha 410082China

In this study,a string of Cr-Mnco-modified activated coke catalysts(XCryMn1-y/AC)were prepared to investigate toluene and Hg0 removal *** characterizations including XRD,TEM,SEM,in situ DRIFTS,BET,XPS and H_(2)-TPR showed that 4%Cr0.5Mn0.5/AC had excellent physicochemical properties and exhibited the best toluene and Hg0 removal efficiency at 200◦*** varying the experimental gas components and conditions,it was found that too large weight hourly space velocity would reduce the removal efficiency of toluene and *** O_(2) promoted the abatement of toluene and Hg0,the inhibitory role of H_(2)O and SO_(2) offset the promoting effect of O_(2) to some *** significantly inhibited Hg0 removal,resulting from that toluene was present at concentrations orders of magnitude greater than mercury’s or the catalyst was more prone to adsorb toluene,while Hg0 almost exerted non-existent influence on toluene *** mechanistic analysis showed that the forms of toluene and Hg0 removal included both adsorption and oxidation,where the high-valent metal cations and oxygen vacancy clusters promoted the redox cycle of Cr^(3+)+Mn^(3+)/Mn^(4+)+Cr^(6+)+Mn^(2+),which facilitated the conversion and replenishment of reactive oxygen species in the oxidation process,and even the CrMn1.5O4 spinel structure could provide a larger catalytic interface,thus enhancing the adsorption/oxidation of toluene and ***,its excellent physicochemical properties make it a costeffective potential industrial catalyst with outstanding synergistic toluene and Hg0 removal performance and preeminent resistance to H_(2)O and SO_(2).

关键词： Toluene Element mercury Cr-Mn oxides Activated coke

Tandemly promoting the sulfur redox kinetics through low concentration mixed organodiselenide and organoditelluride in Ah-level high-energydensity Li-S batteries

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science China Materials 2025年第1期68卷 207-216页

作者： Jiangqi Zhou Chengyong Shu Qianyu Zhang Wei Tang Yuping Wu School of Chemical Engineering and Technology Xi’an Jiaotong UniversityXi’an 710049China School of Energy and environment Southeast UniversityNanjing 210096China college of Materials science and Engineering Sichuan UniversityChengdu 610064China School of Chemical Engineering Kunming University of Science and TechnologyKunming 650500China

Homogeneous redox mediation is efficient in alleviating the shuttling effect and slow redox kinetics of lithium polysulfides in lithium-sulfur ***,their perfect performance is not fulfilled owning to the fact that the multi-step transformation of lithium polysulfides requests the multifunctional active positions for the tandem *** on the redox comediation principles,a promoter of mixing organodiselenide and organoditelluride(mixed-Se/Te)was raised to induce tandem catalysis and boost the effective electrochemical conversion of lithium *** specifically,diphenyl diselenide facilitated the liquid-liquid and solid-liquid transformation between lithium polysulfides and sulfur,while diphenyl ditelluride improved the solid-liquid transformation concerning lithium sulfide ***,even under high sulfur loading of 6.5 mg cm^(−2) and low electrolyte/sulfur ratio of 5.88μL mg^(−1),the 10 mM low concentration mixed-Se/Te promoter offered a high discharge capacity of 6.6 mAh cm^(−2) and high rate performance of 4.1 mAh cm^(−2) at 0.5 ***,the assembled 1.5 Ah-level lithium-sulfur pouch cells provide an energy density of 332 Wh kg^(−1) at 0.05 C and good cycling *** research demonstrates the applicability of propelling continuous sulfur conversion reactions with detached active positions and is anticipated to stimulate deep molecular design of kinetic promoter to targeted energy-associated redox reactions.

关键词： lithium-sulfur batteries redox kinetics tandem catalysis organodiselenide organoditelluride

Surface controllable wettability using amphiphilic rotaxane molecular shuttles

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Chinese Chemical Letters 2025年第2期36卷 422-425页

作者： Dongpu Wu Zheng Yang Yuchen Xia Lulu Wu Yingxia Zhou Caoyuan Niu Puhui Xie Xin Zheng Zhanqi Cao college of science Henan Agricultural University

Herein,an alkyne-terminated acid/base responsive amphiphilic [2]rotaxane shuttle was synthesized,and then modified onto the glass surface through “click” *** XPS N 1s spectrum and contactangle measurement were performed to prove the successful *** amphiphilic [2]rotaxane functionalized surface presented controllable wettability responding to external acid-base *** bistable rotaxane modified material system promoted the practical application of molecular machines.

关键词： Amphiphilic rotaxane Controllable wettability Stimuli-responsive

Unraveling the link between lipid oxidation and off-flavor development in grass carp fillets(Ctenopharyngodon idellus) during cold storage: A non-targeted lipidomics approach

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Food science and Human Wellness 2025年

作者： Huifang Yang Ramy M.Khoder Shanbai Xiong Juan You Yueqi An Key Laboratory of environment Correlative Dietology， Ministry of Education， college of Food science and Technology， Huazhong Agricultural University Faculty of Agriculture， Benha University college of Health science and Engineering， Hubei University

Grass carp fillets were susceptible to unpleasant fishiness during cold storage. To clarify the mechanism of fishy odor formation and achieve targeted regulation， volatile compounds， and lipid oxidation were investigated in grass carp fillets during cold storage （0-7d）. The lipid oxidation degree increased continually during cold storage， as evidenced by the change of AV， POV， TBARS， and HP. The activities of related enzymes (LOX， LPS， PLA[2]， and HPL) maintained a high level， reaching their maximums after 3-5 days. Free fatty acids exhibited a great downtrend， especially linoleic acid （18:2） and arachidonic acid （20:4）. Forty-five volatile compounds were identified by solvent-assisted flavor evaporation-gas chromatography-mass spectrometer， and the total contents of volatile compounds increased from 706.55 μg/kg （0d） to 1370.65 μg/kg （7d）. （Z）-4-heptenal，（E，E）-2，4-hexadienal， 1-penten-3-ol， nonanal， and （E）-2-heptenal were the key volatile compounds. The Pearson correlation showed a strong correlation between 47 differentially abundant lipids （variables important in projection > 1， P value 2） and volatile compounds. During cold storage， lyso-phosphatidylcholine （20:4） and lyso-phosphatidylcholine （18:2） were selected as the main precursors of volatile compounds’ formation in grass carp fillets.

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