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Variations in rare earth elements with environmental factors in lake surface sediments from 17 lakes in western China

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Journal of Mountain Science 2021年第7期18卷 1811-1822页

作者： DU Ding-ding CHEN Liu-qin bai yong-hui HU Hai-ping School of Earth Sciences East China University of TechnologyNanchang 330013China State Key Laboratory of Nuclear Resources and Environment Nanchang 330013China School of Earth Sciences Lanzhou UniversityLanzhou 730000China

Numerous lakes in western China are excellent sites for understanding environmental ***,what dominates rare earth element(REE) variations are still under debate in the lake environmental *** this study,we selected 28 surface sediment samples from 17 lakes(*** lakes,small water bodies,etc.) in the QinghaiTibet Plateau and Xinjiang *** samples were analyzed to reveal the behavior of the REEs and major *** REE patterns are characterized by light rare earth element(LREE) enrichment,weak Ce anomaly(0.84-0.98,0.94 on average) and negative Eu anomaly(0.53-1.00,0.67 on average).The homogeneous REE patterns may reflect similar REE of the source ***,the REE abundances showed some significant *** this study,water chemistry data analyses inferred that the highly REE values appear possibly in the saltwater lake,and also related to carbonate mineral,whereas p H played a minor role in REE *** large-scale lakes(*** Bosten and Lake Ulungur),the results showed that the relatively larger REE values are in the margins of ***,lower REE contents are towards the central *** study suggested that five major factors control the REE contents:(1) The REE tends to increase with the increase of the weathering intensity.(2) Likewise,heavy mineral(***,anatase,zircon,etc.) are probably primary in these sediments because they are highly enriched in the REE.(3) The contribution of Fe-Mn oxides is significant in sediments because their concentrations highly correlate with the REE.(4) The carbonate mineral(mainly calcite) played a significant role on the REE values in the lakes because the REEs are incorporated into the carbonate minerals generating the low REE concentrations.(5) Major element analysis,mineral analysis,and grain-size data analysis showed that the REE distribution is chiefly influenced by finer grain-size component of lake sediments due to the decreasing propor

关键词： Western China Lake surface sediments Rare earth elements Environmental factors

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Influences of environmental factors on the modern 14C reservoir effects in Qinghai-Tibet Plateau lakes

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Journal of Mountain Science 2021年第12期18卷 3179-3189页

作者： DU Ding-ding LI Zhi-wen HU Hai-ping bai yong-hui LI Wen MUGHAL Muhammad Saleem QIAN Hai-Yan East China University of Technology Key Laboratory for Digital Land and Resources of Jiangxi ProvinceNanchang 330013China Lanzhou University School of Earth SciencesLanzhou 730000China School of Environmental and Chemical Engineering Foshan UniversityFoshan 528000China Institute of Geology University of Azad Jammu and KashmirMuzaffarabad 13100Pakistan

The establishment of reliable age in the lake sediment profile mainly depends on the AMS 14C dating ***,the presence of the 14C lake reservoir effects(LREs)restricted for using radiocarbon dating in lake sediment,especially in dry and cold areas with a scarce plant cover in the Qinghai-Tibet ***,the discussion of influence factors of LREs is *** paper selected 15 lakes(17 sediment and 3 plant samples)in the Qinghai-Tibet Plateau to examine the distribution characteristics of the modern LREs and their main influencing *** our study area,14 lakes were all affected by the *** minimum 14C year is 5900 a BP towards the deep water area,whereas the maximum 14C year is up to 7185 a BP in the margins of Lake *** maximum 14C year is up to 7750 a BP,and the minimum 14C year is present-day carbon in the 15 *** further study indicated that the LRE differences in individual lake are mostly owing to the contribution of exogenous *** results displayed that the LREs tended to increase with the increase of the salinity,moreover,the LREs of saltwater lakes or salt lakes were significantly larger than freshwater lakes due to the possible supply of old total dissolved inorganic carbon with a long residence time in the ***,the contribution of calcite played a significant role on the ***,the LREs differences are affected by the source of organic *** lake with groundwater supply shows large LRE due to likely being influenced by crustal and ancient CO_(2) uprising.

关键词： Qinghai-Tibet Plateau Hydro-chemistry indexes Lake surface sediments Lake reservoir effects

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Ideal Bi‑Based Hybrid Anode Material for Ultrafast Charging of Sodium‑Ion Batteries at Extremely Low Temperatures

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Nano-Micro Letters 2025年第3期17卷 152-167页

作者： Jie bai Jian hui Jia Yu Wang Chun Cheng Yang Qing Jiang Key Laboratory of Automobile Materials(Jilin University) Ministry of EducationSchool of Materials Science and EngineeringJilin UniversityChangchun 130022People’s Republic of China

Sodium-ion batteries have emerged as competitive substitutes for low-temperature applications due to severe capacity loss and safety concerns of lithium-ion batteries at−20°C or ***,the key capability of ultrafast charging at ultralow temperature for SIBs is rarely ***,a hybrid of Bi nanoparticles embedded in carbon nanorods is demonstrated as an ideal material to address this issue,which is synthesized via a high temperature shock *** a hybrid shows an unprecedented rate performance(237.9 mAh g^(−1)at 2 A g^(−1))at−60℃,outperforming all reported SIB anode *** with a Na_(3)V_(2)(PO_(4))_(3)cathode,the energy density of the full cell can reach to 181.9 Wh kg^(−1)at−40°*** on this work,a novel strategy of high-rate activation is proposed to enhance performances of Bi-based materials in cryogenic conditions by creating new active sites for interfacial reaction under large current.

关键词： Bi nanoparticles High temperature shock High-rate activation Ultrafast charging Low-temperature sodium-ion batteries

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Multivariate synergy for heightening ionic HOF robustness and proton conductivity

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Science China Chemistry 2025年

作者： Xiang-Tian bai Li-hui Cao Xu-yong Chen Jia-Yu Wang Zi-Ye Zhou Shaanxi Key Laboratory of Chemical Additives for Industry College of Chemistry and Chemical EngineeringShaanxi University of Science and Technology

Multicomponent crystalline materials construct more complex and diversified structures with different combinations and modes,which expands the material structure space and application *** this work,we have successfully synthesized two twocomponent ionic hydrogen-bonded organic frameworks （iHOF-32 and iHOF-33） and a three-component iHOF （iHOF-34）.Guanidine hydrochloride which is rich in N and H and has a short chain length strengthens the hydrogen bonding network of iHOF,thereby aiding in the efficient migration of *** rigid architecture of 1,1'-diamino-4,4'-bipyridine diiodide furnishes additional scaffolding for the iHOFs and enhances its robustness under harsh ***-34 accomplishes the combination of the ultra-high proton conductivity of iHOF-32 and the robustness of iHOF-33 by the synergistic interaction among the three components of *** addition,iHOF-34 was fabricated as a composite membrane with a peak proton conductivity of 1.55×10-1S cm-1,which is 3.8 times higher than that of recast Nafion,and has extensive potential in fuel *** self-assembly strategy of multicomponent HOFs opens up new avenues for constructing diverse structures while promising new opportunities for applications in the fields of proton conduction and energy storage.

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Hypidone hydrochloride(YL-0919)ameliorates functional deficits after traumatic brain injury in mice by activating the sigma-1 receptor for antioxidation

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Neural Regeneration Research 2025年第8期20卷 2325-2336页

作者： Yafan bai hui Ma Yue Zhang Jinfeng Li Xiaojuan Hou Yixin Yang Guyan Wang Yunfeng Li Department of Anesthesiology Beijing Tongren HospitalCapital Medical UniversityBeijingChina Beijing Institute of Basic Medical Sciences BeijingChina Hebei North University ZhangjiakouHebei ProvinceChina Beijing Institute of Pharmacology and Toxicology State Key Laboratory of Toxicology and Medical CountermeasuresBeijing Key Laboratory of NeuropsychopharmacologyBeijingChina

Traumatic brain injury involves complex pathophysiological mechanisms,among which oxidative stress significantly contributes to the occurrence of secondary *** this study,we evaluated hypidone hydrochloride(YL-0919),a self-developed antidepressant with selective sigma-1 receptor agonist properties,and its associated mechanisms and targets in traumatic brain *** experiments to assess functional deficits were followed by assessment of neuronal damage through histological analyses and examination of blood-brain barrier permeability and brain ***,we investigated the antioxidative effects of YL-0919 by assessing the levels of traditional markers of oxidative stress in vivo in mice and in vitro in HT22 ***,the targeted action of YL-0919 was verified by employing a sigma-1 receptor antagonist(BD-1047).Our findings demonstrated that YL-0919 markedly improved deficits in motor function and spatial cognition on day 3 post traumatic brain injury,while also decreasing neuronal mortality and reversing blood-brain barrier disruption and brain ***,YL-0919 effectively combated oxidative stress both in vivo and in *** protective effects of YL-0919 were partially inhibited by *** results indicated that YL-0919 relieved impairments in motor and spatial cognition by restraining oxidative stress,a neuroprotective effect that was partially reversed by the sigma-1 receptor antagonist ***-0919 may have potential as a new treatment for traumatic brain injury.

关键词： antidepressant drug blood-brain barrier cognitive function hypidone hydrochloride(YL-0919) neurological function nuclear factor-erythroid 2 related factor 2 oxidative stress sigma-1 receptor superoxide dismutase traumatic brain injury

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CO_2气氛对胜利褐煤热解过程的影响

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燃料化学学报 2017年第3期45卷 272-278页

作者：郝成浩朱生华白永辉李凡太原理工大学煤科学与技术省部共建国家重点实验室培育基地山西太原030024

以5-8 mm胜利褐煤为研究对象,利用固定床反应器,在400-700℃、CO_2气氛下进行热解实验,研究了CO_2气氛对煤热解气、液、固三相产物分布的影响,探讨了CO_2对煤焦结构作用的机理。研究表明,与N_2气氛相比,CO_2气氛热解提高焦油和热解水产... 详细信息

以5-8 mm胜利褐煤为研究对象,利用固定床反应器,在400-700℃、CO_2气氛下进行热解实验,研究了CO_2气氛对煤热解气、液、固三相产物分布的影响,探讨了CO_2对煤焦结构作用的机理。研究表明,与N_2气氛相比,CO_2气氛热解提高焦油和热解水产率,降低热解气和半焦产率;400和500℃时,CO_2气氛下形成的半焦孔隙结构和总孔体积没有明显的变化,600和700℃时,CO_2气氛下所得半焦的比表面积及孔容较N2气氛下的大,是与煤焦内部挥发分大量释放以及CO_2进入孔道与活性位反应有关;煤热解过程中CO_2的引入能促进煤焦中3-5环芳香结构的消耗,导致煤焦结构芳香度的提高;600和700℃时,CO_2气氛下热解气中H_2和CH_4产率低,同时CO_2能与煤焦发生气化反应显著提高CO含量。

关键词：褐煤热解半焦性质 CO2气氛

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气流床撞击流水煤浆气化火焰光谱辐射特性实验研究

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光谱学与光谱分析 2020年第2期40卷 465-471页

作者：宋旭东郭庆华龚岩苏暐光白永辉于广锁宁夏大学省部共建煤炭高效利用与绿色化工国家重点实验室宁夏银川750021 华东理工大学煤气化及能源化工教育部重点实验室上海200237

火焰光谱检测技术应用于气化炉有效监控,能实时反映气化炉工况,保障气化炉稳定运行。采用实验室规模的气流床撞击水煤浆气化装置,利用光纤光谱仪通过对气化炉不同部位进行探测,研究了水煤浆气化火焰在距离撞击平面不同轴向位置L处的光... 详细信息

火焰光谱检测技术应用于气化炉有效监控,能实时反映气化炉工况,保障气化炉稳定运行。采用实验室规模的气流床撞击水煤浆气化装置,利用光纤光谱仪通过对气化炉不同部位进行探测,研究了水煤浆气化火焰在距离撞击平面不同轴向位置L处的光谱辐射特性,并利用不同自由基强度及分布对气化炉内各反应区进行表征,为气化炉运行工况提供依据。结果表明:在300~800 nm范围内可检测到明显的OH(306.7和309.8 nm),H 2(382 nm),CH(314.5和387 nm),Na(589 nm),Ar(671 nm)和K(404,768和770 nm)特征峰,而各种粒子激发方式及分布方式不同,可用于实现火焰宏观特征的表征。从紫外至可见光区域。水煤浆气化火焰中存在强烈的背景辐射,主要包括颗粒在高温下产生的黑体辐射及CO 2受热激发产生的350~600 nm的连续旋转辐射,强烈的背景辐射对自由基强度辐射测定形成干扰,需通过计算扣除背景辐射。利用检测到的各自由基强度分布可对气化火焰进行表征,OH分布可表征火焰反应区域,而CH存在范围相对较窄,仅存在于-10 cm

关键词：光谱辐射气流床气化炉化学激发热激发燃烧诊断

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自由基的化学发光特性在火焰光谱诊断的应用综述

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光谱学与光谱分析 2020年第11期40卷 3358-3364页

作者：周莹白永辉宋旭东姚敏王焦飞苏暐光于广锁宁夏大学省部共建煤炭高效利用与绿色化工国家重点实验室宁夏银川750021 华东理工大学洁净煤技术研究所上海200237 国家能源集团宁夏煤业有限责任公司宁夏银川750011

火焰诊断技术是指运用光谱、图像、噪声等传感手段,获得火焰状态的信息,通过所获取的信息分析火焰的燃烧和气化状态。发展燃烧过程诊断和优化火焰诊断方法是燃烧工业面临的挑战之一,燃烧诊断技术的提升可以更好地监测不同燃料的效率、... 详细信息

火焰诊断技术是指运用光谱、图像、噪声等传感手段,获得火焰状态的信息,通过所获取的信息分析火焰的燃烧和气化状态。发展燃烧过程诊断和优化火焰诊断方法是燃烧工业面临的挑战之一,燃烧诊断技术的提升可以更好地监测不同燃料的效率、可靠性和灵活性。火焰光谱诊断可以确定火焰的位置、当量比等宏观性质,也可以探究火焰自身的特征,如瞬间产生的物质等。通过光谱诊断的方法可以更加全面地了解燃烧的过程。由于激光诊断方法具有系统复杂、环境要求严格等缺点,基于火焰自发化学发光的检测方法越来越受到人们的重视。阐述火焰光谱诊断技术的研究进展和发展趋势,主要介绍了化学发光信号的产生机理,光谱诊断燃烧中间产物(OH*, CH*和C*2)的化学发光反应机理模型和主要产生路径。总结了火焰光谱诊断技术在对燃烧中间产物研究中的应用进展,包括采用化学发光表征热释放速率、化学发光峰值强度与当量比的关系、化学发光强度峰值位置对火焰温度峰值位置的表征、用化学发光图像确定射流火焰的推举高度和基于光谱图像处理的火焰结构表征。探讨了实际应用中化学发光作为诊断工具在包含额外背景辐射的火焰中受到影响, CH*化学发光的测量被环境中碳烟的黑体辐射遮蔽的问题。进一步展望了火焰光谱诊断技术在未来的应用前景。未来光谱诊断的发展将会呈现使用更详细的燃烧机理来提升火焰光谱诊断的准确性、减小湍流对局部燃烧的影响、减小不均匀的碳烟对火焰图像准确性造成的影响、提升摄像机和光谱仪的精度等发展趋势。化学发光光谱和图像在线测量方法及技术对于推动与燃烧和流动相关领域研究具有重要的科学发展意义和广阔的工程指导意义。

关键词：光谱诊断自由基辐射化学发光燃烧中间产物

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Mo和Ni改性的HZSM-5催化剂对煤热解焦油的改质

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燃料化学学报 2016年第1期44卷 30-36页

作者：闫伦靖孔晓俊白永辉谢克昌李凡太原理工大学煤科学与技术省部共建国家重点实验室培育基地山西太原030024

考察了Mo和Ni改性的HZSM-5催化剂对煤热解焦油的改质性能,分析了催化改质前后焦油中轻质芳烃分布的变化规律。结果表明,经HZSM-5催化剂褐煤(XM)热解轻质芳烃总量的增加率为220%,这与煤热解产物在HZSM-5催化剂中发生烯烃和烷烃的芳构化... 详细信息

考察了Mo和Ni改性的HZSM-5催化剂对煤热解焦油的改质性能,分析了催化改质前后焦油中轻质芳烃分布的变化规律。结果表明,经HZSM-5催化剂褐煤(XM)热解轻质芳烃总量的增加率为220%,这与煤热解产物在HZSM-5催化剂中发生烯烃和烷烃的芳构化以及酚羟基脱除等作用有关。负载活性金属Mo和Ni后,可以有效促进轻质芳烃的生成;Ni对焦油中带脂肪侧链化合物具有更强的裂解作用,而Mo则有利于带侧链化合物如甲苯和二甲苯的形成。焦煤(FX)热解过程中轻质芳烃的释放量分别是XM煤和年轻烟煤(PS)的2.2和2.4倍。经催化改质后,XM煤产物中轻质芳烃产率明显大于PS煤,并接近FX煤;这主要是因为XM煤结构中含有较多的含氧官能团和脂肪结构,在HZSM-5作用下可催化形成轻质芳烃。

关键词：煤热解焦油催化改质轻质芳烃

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宁东煤煤焦-CO_2气化反应特性的原位研究

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燃料化学学报 2019年第4期47卷 385-392页

作者：张新沙宋旭东苏暐光卫俊涛白永辉于广锁宁夏大学省部共建煤炭高效利用与绿色化工国家重点实验室宁夏银川750021 华东理工大学煤气化及能源化工教育部重点实验室上海200237

以典型宁东煤-梅花井烟煤和羊场湾烟煤焦为气化样品,并与典型气化用煤-神府烟煤焦对比,采用热重分析仪及高温热台-光学显微镜联用系统原位研究煤焦气化反应活性,并结合焦样理化结构特性的系统表征对其进行关联解释。结果表明,在相同气... 详细信息

以典型宁东煤-梅花井烟煤和羊场湾烟煤焦为气化样品,并与典型气化用煤-神府烟煤焦对比,采用热重分析仪及高温热台-光学显微镜联用系统原位研究煤焦气化反应活性,并结合焦样理化结构特性的系统表征对其进行关联解释。结果表明,在相同气化温度下,三种煤焦的气化反应活性大小顺序为:羊场湾烟煤焦>梅花井烟煤焦>神府烟煤焦。由高温热台实验原位研究可知,随着煤焦-CO_2反应的进行,大部分煤焦颗粒反应形式以颗粒收缩进行,到达反应中后期,反应由颗粒收缩转变为缩芯形式,并通过投射面积收缩率可发现,相同反应时间下,羊场湾烟煤焦的投射面积收缩率最大,其后依次为梅花井烟煤焦和神府烟煤焦。气化反应活性的差异主要归因于不同煤焦理化性质间的差异:羊场湾烟煤焦的比表面积、炭结构无序化程度和K、Na、Ca总含量最大,其后依次为梅花井烟煤焦和神府烟煤焦。

关键词：宁东煤高温热台-光学显微镜联用系统气化反应活性理化性质

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