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Concentrations,Seasonal Variations,and Transport of arbonaceous Aerosols at a Remote Mountainous Region in Western china

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Concentrations,Seasonal Variations,and Transport of arbonace...

Return to the Moon:New perspectives on lunar exploration

第十届全国气溶胶会议暨第六届海峡两岸气溶胶技术研讨会

作者： Jun-Ji Cao 1,Bai-qing xu 2,Jian-Qiao He3,Xian-qin Liu3,Yong-Ming Han1 1 SKLLQG,institute of Earth Environment,chinese academy of sciences,Xi’an 710075,china 2 laboratory of Tibetan Environment and Land Surface Processes,institute of Tibetan Plateau Research,chinese academy of sciences,Beijing 100085,china 3 state key laboratory of Cryosphere sciences,Cold and Arid Regions environmental and Engineering Research institute,chinese academy of sciences,Lanzhou 730000,china

Carbonaceous aerosol concentrations were determined for samples collected from Muztagh Ata Mountain in western china from December 2003 to February *** carbon（EC） in total suspended particle（TSP） samples varied from 0.004 to 0.1.4 μg m-3（average = 0.056 μg m-3） while organic carbon（OC） and carbonate carbon（CC） ranged from 0.1. to 2.1. μg m-3 and below detection to 3.57 μg m-3,*** EC and OC concentrations occurred during the winter-spring seasons while CC concentrations were higher during the warmer *** accounted for～7% of the total carbon（TC = EC + OC + CC） during spring and summer and 1.% during autumn and winter;EC was the smallest carbonaceous fraction except in winter when CC was the ***/EC ratios varied from 2.9 to 32.1.average = 1..0）,and strong correlations between OC and EC（R2:0.75 to 0.77） in spring and winter suggest their cycles are coupled,but lower correlations in summer（0.39） and autumn（0.57） suggest that biogenic emissions and secondary OC become important as temperatures *** of in air parcel back trajectories indicate that about 0.05 μg m-3 EC,0.42 μg m-3 OC,and 0.1. μg m-3 CC were transported from outside *** Ata has EC concentrations nearly as low as those in polar areas;these may represent a background level for inland *** annual EC concentration was fall in the range and close to the lowest bound of EC contents that recovered from ice core drilled in Muztagh Ata glaciers.

关键词： Elemental carbon Organic carbon Carbonate carbon Aerosol Ice core Remote Atmosphere

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Science Bulletin 2024年第13期69卷 2136-2148页

作者： Yangting Lin Wei Yang Hui Zhang Hejiu Hui Sen Hu Long Xiao Jianzhong Liu Zhiyong Xiao Zongyu Yue Jinhai Zhang Yang Liu Jing Yang honglei Lin Aicheng Zhang Dijun Guo Sheng Gou Lin xu Yuyang He Xianguo Zhang Liping qin Zongcheng Ling Xiongyao Li Aimin Du Huaiyu He Peng Zhang Jinbin Cao Xianhua Li key {1. of Earth and Planetary Physics Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China state {1. laboratory for Mineral Deposits Research and School of Earth sciences and Engineering Nanjing UniversityNanjing 210023China state {1. laboratory of Geological Processes and Mineral Resources School of Earth SciencesChina University of GeosciencesWuhan 430074China institute of {1. Chinese Academy of SciencesGuiyang 550002China Planetary environmental and Astrobiological Research {1. School of Atmospheric SciencesSun Yat-sen UniversityZhuhai 519082China National Space Science Center Chinese Academy of SciencesBeijing 100190China Deep Space Exploration laboratory/CAS {1. laboratory of Crust-Mantle Materials and Environments University of Science and Technology of ChinaHefei 230026China Shandong key {1. of Optical Astronomy and Solar-Terrestrial Environment Institute of Space SciencesShandong UniversityWeihai 264209China Technology and Engineering Center for Space Utilization Chinese Academy of SciencesBeijing 100094China School of Space and Environment Beihang UniversityBeijing 100191China

Lunar exploration is deemed crucial for uncovering the origins of the Earth-Moon system and is the first step for advancing humanity’s exploration of deep *** the past decade,the chinese Lunar Exploration Program(CLEP),also known as the Chang’e(CE)Project,has achieved remarkable *** has successfully developed and demonstrated the engineering capability required to reach and return from the lunar ***,the CE Project has made historic firsts with the landing and on-site exploration of the far side of the Moon,along with the collection of the youngest volcanic samples from the Procellarum KREEP *** achievements have significantly enhanced our understanding of lunar *** on this success,{1. has proposed an ambitious crewed lunar exploration strategy,aiming to return to the Moon for scientific exploration and *** plan encompasses two primary phases:the first crewed lunar landing and exploration,followed by a thousand-kilometer scale scientific expedition to construct a geological cross-section across the lunar *** the limitations of current lunar exploration efforts and china’s engineering and technical capabilities,this paper explores the benefits of crewed lunar exploration while leveraging synergies with robotic *** study refines fundamental lunar scientific questions that could lead to significant breakthroughs,considering the respective engineering and technological *** research lays a crucial foundation for defining the objectives of future lunar exploration,emphasizing the importance of crewed missions and offering insights into potential advancements in lunar science.

关键词： Crewed lunar exploration Water and volatiles Composition and structure of lunar interior Volcanic activity and evolution of lunar mantle Space weathering and radiation environments Exploration technology

High-resolution carbon isotope record for the Paleocene-Eocene thermal maximum from the Nanyang Basin,Central china

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High-resolution carbon isotope record for the Paleocene-Eoce...

A novel four-way combining catalysts for simultaneous removal of exhaust pollutants from diesel engine

中国科学院地质与地球物理研究所第十届(201.年度)学...

作者： ZHU Min~(1,2*),DING ZhongLi~1,WANG xu~1,chen ZuoLing~1,jiang HanChao~3, DONG XinXin~1,JI JunLiang~4,TANG ZiHua~1 & LUO Pan~1 1 key laboratory of Cenozoic Geology and Environment,institute of Geology and Geophysics,chinese academy of sciences,Beijing 100029, china 2 The Graduate University of chinese academy of sciences,Beijing 100049,china 3 state key laboratory of Earthquake Dynamics,institute of Geology,china Earthquake Administration,Beijing 100029,china 4 key laboratory of Biogeology and environmental Geology,Ministry of Education,china University of Geosciences,Wuhan 430074,china

The Paleocene-Eocene thermal maximum(PETM) was a transient episode of global warming,associated with massive atmospheric greenhouse gas input that occurred at the Paleocene/Eocene *** and isotope stratigraphic studies indicate that the PETM event is well documented in the marl deposits of the Yuhuangding section in the Nanyang Basin,Central china,with a carbon isotope negative excursion of～6.1.within 1.-m-thick marl *** is the highest resolution record of the PETM so far found in the *** PETM event was triggered within 2-cm-thick marl sediments,with a decrease ofδC (stable carbon isotope ratio) from -3.2‰to -5.2‰,suggesting a massive methane hydrate release for a transient period that was possibly caused by a catastrophic event.A comparison between marine and terrestrial records indicates a"Three-Phase Model"for the PETM *** there is a rapid negative excursion in theδC record,followed by a slowly decreasing trend,and then a gradual positive recovery,corresponding respectively to a rapid dissociation of oceanic methane hydrate,followed by a slow release of methane and then the consumption of the released methane.

关键词： PETM carbon isotope greenhouse gases Nanyang Basin

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Journal of environmental {1. 2010年第7期22卷 1104-1109页

作者： Jian Liu,Jie xu,Zhen Zhao,Aijun Duan,Guiyuan {1.,Yanni Jing state key laboratory of Heavy Oil Processing,china University of Petroleum,Beijing 1.2249,china. state {1. laboratory of Heavy Oil Processing China University of Petroleum Beijing 102249 China

A novel four-way combining catalysts containing double layers was applied to simultaneously remove four kinds of exhaust pollutants （NOx, CO, HC and PM） emitted from diesel engine. The four-way catalysts were characterized using scanning electron microscope （SEM） and Ultraviolet visible diffuse reflectance spectroscopy （UV-Vis DRS）. Their catalytic performances were evaluated by temperature-programmed reaction technology. The double layer catalysts could effectively remove the four main pollutants. The highest catalytic activity was given by the two-layered catalysts of La0.6 K0.4CoO3/Al2O3 and W/HZSM-5. Under the simulated exhaust gases conditions, the peak temperature of the soot combustion was 421., the maximal conversion of NO to N2 was 74%, the temperature of the HC total conversion was 357℃, and the maximum conversion ratio of CO was 99%.

关键词： four-way combining catalyst diesel engine exhaust double layers perovskite oxides zeolite catalysts

Salinity fronts shape spatial patterns in zooplankton distribution in Hangzhou Bay

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Acta Oceanologica Sinica 2024年第6期43卷 96-106页

作者： Yepeng xu Yiqi Wang Lin Zhan Yijun Ou Kangning Jia Ming Mao xuyu Zhu Zhibing jiang Yuanli Zhu Wei Huang Ping Du jiangning Zeng Lu Shou Feng Zhou key {1. of Marine Ecosystem Dynamics Second Institute of OceanographyMinistry of Natural ResourcesHangzhou 310012China key {1. of Nearshore Engineering Environment and Ecological Security of Zhejiang Province Hangzhou 310012China state {1. laboratory of Satellite Ocean Environment Dynamics Ministry of Natural ResourcesHangzhou 310012China Nantong Marine environmental Monitoring Center Ministry of Natural ResourcesNantong 226002China key {1. of Ocean Space Resource Management Technology Ministry of Natural ResourcesHangzhou 310012China Observation and Research Station of Marine Ecosystem in the Yangtze River Delta Ministry of Natural ResourcesZhoushan 316021China

Ocean fronts play important roles in nutrient transport and in the shaping ecological *** zones in small bays are typically small in scale,have a complex structure,and they are spatially and temporally variable,but there are limited data on how biological communities respond to this *** Bay,a mediumsized estuary in china,is an ideal place in which to study the response of plankton to small-scale ocean fronts,because three water masses(Qiantang River Diluted Water,Chang{1. River Diluted Water,and the East china Sea current) converge here and form dynamic salinity fronts throughout the *** investigate zooplankton communities,and temperature,salinity and chlorophyll a(Chl a) in Hangzhou Bay in June(wet perio d) and December(dry period) of 2022 and examine the dominant environmental factors that affect zooplankton community spatial *** then match the spatial distributions of zooplankton communities with those of salinity fronts.S alinity is the most important explanatory variable to affect zooplankton community spatial variability during both wet and dry periods,in that it contributes>60% of the variability in community ***,the spatial distributions of zooplankton match well with salinity *** December,with weaker Qiantang River Diluted Water and a stronger secondary Chang{1. River Plume,zooplankton communities occur in moderate salinity(MS,salinity range 1..6±2.2) and high salinity(HS,22.4±1.7) regions,and their ecological boundaries closely match the Qiantang River Diluted Water *** June,different zooplankton communities occur in low salinity(LS,3.9±1.0),MS(1..7±3.6) and HS(21.3±1.9) *** the LS region occurs abnormally in the central bay rather than its apex because of the anomalous influence of rising and falling tides during the sampling perio d,the ecological boundaries still match salinity ***-salinity or brackish-water zooplankter taxa are relatively more abunda

关键词： zooplankton spatial distribution salinity fronts Hangzhou Bay

给水厂砂滤池反冲洗水直接回用对出厂水水质影响及其风险评价

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环境科学学报 2024年第5期44卷 128-137页

作者：张锋蒋才芳刘敏梁虹许谦蒋菱董慧峪 Ali Mashayekh-Salehi 谢婷刘绍刚广西民族大学化学化工学院林产化学与工程国家民委重点实验室广西林产化学与工程重点实验室广西林产化学与工程协同创新中心南宁530008 中国科学院生态环境研究中心中国科学院饮用水科学与技术重点实验室北京100085 广西绿城水务股份有限公司南宁530031

给水厂的生产废水的回用安全性,备受水务行业关注.本研究以邕江原水和砂滤池反冲洗废水为对象,对某给水厂沿程各单元出水的一般性和毒理学水质指标进行长周期监测,例如浊度、UV_(254)、氨氮(NH_(4)^(+)-N)、高锰酸盐指数(COD_(Mn))、农... 详细信息

给水厂的生产废水的回用安全性,备受水务行业关注.本研究以邕江原水和砂滤池反冲洗废水为对象,对某给水厂沿程各单元出水的一般性和毒理学水质指标进行长周期监测,例如浊度、UV_(254)、氨氮(NH_(4)^(+)-N)、高锰酸盐指数(COD_(Mn))、农药、抗生素等微污染物,探讨砂滤池反冲洗水直接回用对给水厂水质的影响.结果显示,给水厂砂滤池反冲洗水中浊度、氨氮、DOC和COD_(Mn)普遍高于原水,且冬季较高其他季节;UV_(254)、SO_(4)^(2-)、NO_(3)^(-)、Pb、Cu等指标与出厂水相差不大,反冲洗水直接回用对出厂水水质影响不大.各处理单元出水中检出33种农药和4种抗生素,其含量远低于《生活饮用水卫生标准》(GB 5749-2022)限值,但唑醚菌胺、磺胺二甲异嘧啶、诺氟沙星和环丙沙星稍高于原水.荧光光谱分析表明,各处理单元出水的溶解性有机质(DOM)的主要组分为类腐殖质物质和类蛋白质物质,水处理工艺对芳香蛋白类及溶解性微生物代谢产物有一定去除作用.砂滤池反冲洗水中富集较多铝(Al),浓度达到0.1. mg·L^(-1.,回用时需加以关注.健康风险评价模型结果显示出厂水中残余铝的个人健康年风险最大值为5.34×1.^(-7),低于最大可接受年风险水平1.^(-6).

关键词：反冲洗水废水回用水质分析长周期监测健康风险评估

水源水Fe(Ⅵ)与Mn(Ⅶ)预氧化对天然有机物的组成特征及消毒副产物生成势的影响

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环境化学 2024年第4期43卷 1138-1149页

作者：韩港胜侯嫔储文斌王艳段书乐强志民刘丁伟许谦蒋菱蒋才芳董慧峪中国矿业大学化学与环境工程学院北京100083 中国科学院生态环境研究中心饮用水科学与技术重点实验室北京100085 广西绿城水务股份有限公司南宁530031 南京大学污染控制与资源化研究国家重点实验室南京210023

溶解有机物(DOM)普遍存在于地表水源中,是饮用水消毒副产物的重要前驱物.本研究考察了Fe(Ⅵ)与Mn(Ⅶ)预氧化对浙江东部某水源水中DOM的组成特征及消毒副产物生成势的影响.运用三维荧光光谱(3D-EEMs)分析了两种氧化剂在不同的浓度梯度下... 详细信息

溶解有机物(DOM)普遍存在于地表水源中,是饮用水消毒副产物的重要前驱物.本研究考察了Fe(Ⅵ)与Mn(Ⅶ)预氧化对浙江东部某水源水中DOM的组成特征及消毒副产物生成势的影响.运用三维荧光光谱(3D-EEMs)分析了两种氧化剂在不同的浓度梯度下对水样进行预氧化后,水样DOM的荧光光谱特性、荧光特征参数和荧光组分等的变化情况,及氯化后消毒副产物(DBPs)的生成情况.结果表明,水源水水样DOM的来源主要为陆源与内源混合且具有一定的腐殖质化程度,Mn(Ⅶ)和Fe(Ⅵ)预氧化不仅对荧光DOM具有较好的降解效果,对腐殖质类DOM也具有一定的降解作用.在DBPs的生成势方面,Mn(Ⅶ)预氧化对三氯甲烷(TCM)生成势的变化呈现出先增强后减弱的现象,对二氯乙腈(DCAN)的生成势具有一定的减弱作用.而Fe(Ⅵ)预氧化对三氯丙酮(1.1.1.TCP)、溴氯乙腈(BCAN)、二溴乙腈(DBAN)和DCAN的生成势均具有明显的降低作用,对二氯一溴甲烷(DCBM)、二溴一氯甲烷(DBCM)和三溴甲烷(TBM)生成势的变化呈现出先增强后减弱的现象.研究结果推动了水源水氧化消毒工艺的发展并为相关研究提供理论指导.

关键词：溶解有机物三维荧光光谱预氧化氯消毒消毒副产物

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舟形藻生物膜诱导下虾夷扇贝(Mizuhopecten yessoensis)幼虫的变态及其蛋白质组学响应

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海洋与湖沼 2024年第4期55卷 960-966页

作者：徐筱琰杜美荣蒋增杰姜娓娓夏苏东秦晓芳严瑾吕建福天津农学院天津300384 海水养殖生物育种与可持续产出全国重点实验室、中国水产科学研究院黄海水产研究所山东青岛266071 农业农村部海洋渔业与可持续发展重点实验室、中国水产科学研究院黄海水产研究所山东青岛266071 崂山实验室海洋渔业科学与食物产出过程功能实验室山东青岛266237 哈尔滨工程大学黑龙江哈尔滨150000

为深入了解舟形藻(Navicula sp.)生物膜诱导虾夷扇贝(Mizuhopecten yessoensis)幼虫附着变态的机制,选用舟形藻和虾夷扇贝幼虫作为研究对象,研究了4个浓度梯度舟形藻液(1.、1.A、1.0A和1.00A)下虾夷扇贝幼虫附着变态率以及幼虫响应舟形... 详细信息

为深入了解舟形藻(Navicula sp.)生物膜诱导虾夷扇贝(Mizuhopecten yessoensis)幼虫附着变态的机制,选用舟形藻和虾夷扇贝幼虫作为研究对象,研究了4个浓度梯度舟形藻液(1.、1.A、1.0A和1.00A)下虾夷扇贝幼虫附着变态率以及幼虫响应舟形藻生物膜诱导的蛋白质组学差异。结果表明,稀释1.倍后的藻液(1.66 ind./mm^(2))所形成的生物膜对幼虫诱导率最高为45%,与空白组(1.%)差异极显著(P1.,过高或过低浓度都导致诱导率降低。采用非标记定量技术(4D label free)蛋白质组学分析比较舟形藻生物膜和对照组幼虫发现,经舟形藻生物膜诱导后共31.个蛋白质表达显著上调或下调。如谷胱甘肽S转移酶、谷胱甘肽过氧化物酶、组织蛋白酶K、组织蛋白酶L、NAD(P)H氧化酶(形成H2O2)、软骨基质蛋白、胶原蛋白和铁蛋白等。以上这些差异蛋白表达的上下调均与贝类幼虫在附着变态过程中形态学变化息息相关。因此,舟形藻生物膜诱导虾夷扇贝幼虫附着变态的有效成分可能是其产生的胞外多糖,幼虫体内的凝集素检测到舟形藻生物膜表面的多糖后,特异性与多糖结合,最终诱导幼虫完成附着和变态。研究结果可为虾夷扇贝人工培育提供理论依据。

关键词：虾夷扇贝(Mizuhopecten yessoensis) 舟形藻生物膜变态蛋白质组学

基于深度学习的页岩黄铁矿扫描电镜图像分割及环境指示意义:以四川盆地泸州Ⅰ区为例

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地球科学进展 2024年第5期39卷 476-488页

作者：邓乃尔徐浩周文唐小川陈雨露刘永旸刘绍军张益蒋柯刘瑞崟宋威国成都理工大学能源学院(页岩气现代产业学院) 四川成都610059 成都理工大学油气藏地质及开发工程全国重点实验室四川成都610059 成都理工大学计算机与网络安全学院(示范性软件学院) 四川成都610059 中国石油西南油气田公司页岩气研究院四川成都610051 四川大学电子信息学院四川成都610065 贵州省地质调查院贵州贵阳550081

黄铁矿作为页岩体系中最具代表性的重矿物之一,对其进行微观特征识别对于页岩沉积环境研究具有重要意义。以四川盆地泸州I区五峰组一龙一,亚段为例,通过岩心矿物实验、扫描电镜观测、网络模型优化和特征参数统计,构建了适用于黄铁矿扫... 详细信息

黄铁矿作为页岩体系中最具代表性的重矿物之一,对其进行微观特征识别对于页岩沉积环境研究具有重要意义。以四川盆地泸州I区五峰组一龙一,亚段为例,通过岩心矿物实验、扫描电镜观测、网络模型优化和特征参数统计,构建了适用于黄铁矿扫描电镜图像分割的网络模型,实现了基于草莓状黄铁矿参数对研究区沉积环境的判断。结果表明:①优化后的UNet-Im模型对草莓状黄铁矿扫描电镜图像的分割精度可达0.863,证明了改进措施的优越性;②对比黄铁矿含量,龙一^(1.3)_(1.小层黄铁矿含量最高,为2.95%,随后降低至龙一^(4)_(1.小层的2.03%以及五峰组的0.83%;③基于草莓状黄铁矿特征参数,推断出黄铁矿沉积环境为深水硫化环境、深水强还原环境、深水强一弱还原环境以及深水还原一次氧化环境。实现了黄铁矿扫描电镜图像的精准化分割,对于提升行业勘探开发智能化具有借鉴意义。

关键词：黄铁矿深度学习沉积环境泸州Ⅰ区