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Recovery of thorium and rare earths from leachate of ion-absorbed rare earth radioactive residues with N1923 and Cyanex■572

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Journal of Rare Earths 2021年第10期39卷 1273-1281,I0004页

作者： Jia Su xiangguang guo Yun Gao Shan Wu Ruigao Xu Xiaoqi Sun CAS Key Laboratory of Design and Assembly of Functional Nanostructures And Fujian Key Laboratory of NanomaterialsFujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China Xiamen Institute of Rare Earth Materials Haixi InstituteChinese Academy of SciencesXiamen 361021China University of Chinese Academy of Sciences Beijing 100039China Longnan County Nanyu Rare Earth Resources Comprehensive Utilization Co. Ltd.Ganzhou 341000China Ganzhou Rare Earth Group Co. Ltd.Ganzhou 341000China

Ion-absorbed rare earth ores radioactive residues(IREORR)are a class of waste residue from the production of rare earth elements(REEs).Because of its radioactive dose,IREORR are usually stored in waste *** are difficult to be disposed ***,it contains relatively high concentrations of REEs,which can be considered as a valuable secondary *** this paper,a novel process is developed for the separation of thorium(Th)and recovery of REEs from IREORR hydrochloric acid leachate with primary amine N1923 and Cyanex?572,*** effects of sulfate concentration,extractant concentration and pH on N1923 extraction in hydrochloric acid solution were investigated in *** results show that the extraction capacity of N1923 can be improved by adding sulfate to the solution and increasing the concentration of *** has little effect on the extraction of Th when pH is higher than *** for the stripping,REEs are more easily stripped from loaded organic phase than Th,and nitric acid is a better stripping agent than hydrochloric *** with the extraction of Cyanex■572 for REEs,a fractional extraction experiment for separating Th and enriching of REEs was *** yield of Th is higher than 99.9%and the concentration of REEs is enriched to 183.84 g/L.

关键词： Radioactive residues Rare earth Thorium Primary amine N1923 Cyanex?572

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Precipitation transformation of rare earth sulfate into chloride with p-dodecylphenoxy carboxylic acids

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Journal of Rare Earths 2019年第12期37卷 1326-1333页

作者： Yanliang Wang Jia Su xiangguang guo Jianguo Cui Yan Bai Fujian Li Xiaoqi Sun CAS Key Laboratory of Design and Assembly of Functional Nanostructures and Fujian Key Laboratory of NanomaterialsFujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China University of Chinese Academy of Sciences Beijing 100039China Baotou Research Institute of Rare Earths Baotou 014010China State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China Ganzhou Rare Earth Group Co. Ltd.Ganzhou 34WOOChina

Methods for transforming rare earth(RE)sulfate into chloride mainly include extraction process with organophosphonic mono-acids or aliphatic acids and precipitation process with ammonium bicarbonate(NH4 HCO3).In this paper,alkylphenoxy carboxylic acids(HAs)ofp-dodecylphenoxy acetic acid(HA-Ⅰ),pdodecylphenoxypropanoic acid(HA-Ⅱ)and p-dodecylphenoxybutyric acid(HA-Ⅲ),which were liquid at room temperature were synthesized and *** precipitation mechanisms of RE elements with the HAs were investigated and the HA/RE molar ratios of the solid complexes were determined as3:1 by equi-molar series method which accord with the principle of charge *** of HAs for the transformation of RE sulfate from concentrated sulfuric acid roasted RE concentrate into chloride via precipitation method was discussed.100%HA-Ⅱwas selected as the liquid organic precipitant without dilution of volatile solvent soracceleration of phase separation by *** RE sulfate solution can be precipitated by HA-Ⅱafter neutralization with liquid NaOH and stripped with concentrated HCl at room *** concentration of RE chloride of 218.1 g/L with low residue of sulfate radical of 0.536 g/L was *** residual organic precipitant in the raffinate solution was tested to be lower than 8 mg/L at 25℃and the chemical oxygen demand(COD)in wastewater was less than 50 mg/L.

关键词： Rare earth Dodecylphenoxycarboxylic acid Recovery Precipitation Transformation

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Identification and Validation of Vascular-Associated Biomarkers for the Prognosis and Potential Pathogenesis of Hypertension Using Comprehensive Bioinformatics Methods

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World Journal of Cardiovascular Diseases 2024年第3期14卷 115-128页

作者： xiangguang Chang Lei guo Liying Zou Yazhao Ma Jilin Feng Department of Laboratory Yangbi Yi Autonomous County People’s Hospital Dali China Department of Obstetrics and Gynecology Yangbi Yi Autonomous County People’s Hospital Dali China Department of Infectious Diseases Yangbi Yi Autonomous County People’s Hospital Dali China Medical Community Office Yangbi Yi Autonomous County People’s Hospital Dali China

Background: Hypertension, also known as increased blood pressure, is a phenomenon in which blood flows in blood vessels and causes persistently higher-than-normal pressure on the vessel wall. The identification of novel prognostic and pathogenesis biomarkers plays a key role in the management of hypertension. Methods: The GSE7483 and GSE75815 datasets from the gene expression omnibus (GEO) database were used to identify the genes associated with hypertension that were differentially expressed genes (DEGs). The functional role of the DEGs was elucidated by gene body (GO) enrichment analysis. In addition, we performed an immune infiltration assay and GSEA on the DEGs of hypertensive patients and verified the expression of novel DEGs in the blood of hypertensive patients by RT-qPCR. Results: A total of 267 DEGs were identified from the GEO database. GO analysis revealed that these genes were associated mainly with biological processes such as fibroblast proliferation, cell structural organization, extracellular matrix organization, vasculature development regulation, and angiogenesis. We identified five possible biomarkers, Ecm1, Sparc, Sphk1, Thbsl, and Mecp2, which correlate with vascular development and angiogenesis characteristic of hypertension by bioinformatics, and explored the clinical expression levels of these genes by RT-qPCR, and found that Sparc, Sphk1, and Thbs1 showed significant up-regulation, in agreement with the results of the bioinformatics analysis. Conclusion: Our study suggested that Sparc, Sphk1 and Thbs1 may be potential novel biomarkers for the diagnosis, treatment and prognosis of hypertension and that they are involved in the regulation of vascular development and angiogenesis in hypertension.

关键词： Hypertension Biomarkers Differentially Expressed Genes Vascular Development and Angiogenesis Bioinformatics Analysis

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Identification and Validation of Novel Biomarkers Related to the Calcium Metabolism Pathway in Hypertension Patients Based on Comprehensive Bioinformatics Methods

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Health 2024年第3期16卷 173-186页

Background: Hypertension is a universal risk factor for cardiovascular diseases and is thus the leading cause of death worldwide. The identification of novel prognostic and pathogenesis biomarkers plays a key role in disease management. Methods: The GSE145854 and GSE164494 datasets were downloaded from the Gene Expression Omnibus (GEO) database and used for screening and validating hypertension signature genes, respectively. Gene Ontology (GO) enrichment analysis was performed on the differentially expressed genes (DEGs) related to calcium ion metabolism in patients with hypertension. The core genes related to immune infiltration were analyzed and screened, and the activity of the signature genes and related pathways was quantified using gene set enrichment analysis (GSEA). The infiltration of immune cells in the blood samples was analyzed, and the DEGs that were abnormally expressed in the clinical blood samples of patients with hypertension were verified via RT-qPCR. Results: A total of 176 DEGs were screened. GO showed that DEGs was involved in the regulation of calcium ion metabolism in biological processes (BP), actin mediated cell contraction, negative regulation of cell movement, and calcium ion transmembrane transport, and in the regulation of protease activity in molecular functions (MF). KEGG analysis revealed that the DEGs were involved mainly in the cGMP-PKG signaling pathway, ubiquitin-protein transferase, tight junction-associated proteins, and the regulation of myocardial cells. MF analysis revealed the immune infiltration function of the cells. RT-qPCR revealed that the expression of Cacna1d, Serpine1, Slc8a3, and Trpc4 was up regulated in hypertension, the expression of Myoz2 and Slc25a23 was down regulated. Conclusion: Cacna1d, Serpine1, Slc8a3, Trpc4, Myoz2 and Slc25a23 may be involved in the regulation of calcium metabolism pathways and play key roles in hypertension. These differentially expressed calcium metabolism-related genes may serve as pr

关键词： Hypertension Biomarkers Differentially Expressed Genes Ca2+ Metabo-lism Bioinformatics Analysis

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龙南稀土矿区土地利用变化及其对生态系统服务价值的影响

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江西科学 2022年第5期40卷 888-895,1040页

作者：郭祥光陈永林林建平赣南师范大学地理与环境工程学院江西赣州341000

矿区矿产资源的开发活动很大程度上导致了土地利用现状发生变化,进而影响区域的生态环境。以龙南市稀土矿区为例,基于GIS空间分析技术,利用第2次、第3次土地利用调查数据及2017年稀土矿区分布范围数据,系统分析矿区及其外围土地利用变... 详细信息

矿区矿产资源的开发活动很大程度上导致了土地利用现状发生变化,进而影响区域的生态环境。以龙南市稀土矿区为例,基于GIS空间分析技术,利用第2次、第3次土地利用调查数据及2017年稀土矿区分布范围数据,系统分析矿区及其外围土地利用变化规律,并对矿区土地利用变化对生态系统服务价值的影响进行评价。结果表明:(1)2009—2017年前期阶段龙南稀土矿区的稀土开采主要占用了林地、建设用地以及耕地;2017—2019年后期阶段稀土矿区主要转变为林地、建设用地、水域、草地。2009—2019的10年间,稀土矿区范围内的耕地、采矿用地、其他土地呈转出趋势,林地、草地、建设用地、水域呈转入趋势。(2)2009—2019年,龙南稀土矿区外围的耕地和采矿用地面积均呈现减少的趋势,林地和建设用地面积均呈增加的趋势,其他的土地类型变化较小。采矿用地减少与林地增加的面积实现了互补。(3)2009—2019年,龙南稀土矿区的生态系统服务价值总量呈增加的趋势。其中林地和水域对生态系统服务价值的影响最大,对区域生态系统服务价值总量增加贡献最大。

关键词：稀土矿区土地利用变化生态系统服务价值龙南市

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南方丘陵山区稀土矿区土地利用转型实证研究--以赣州市L县为例

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赣南师范大学学报 2022年第6期43卷 108-115页

作者：朱晨辉陈永林林建平郭祥光赣南师范大学地理与环境工程学院江西赣州341000

稀土资源是重要的国家战略资源,但受开采技术的限制,在开采过程中会造成生态环境的破坏.研究稀土矿区周围景观格局的变化,对稀土矿区生态环境的修复具有积极意义.本次研究以L县稀土矿区为研究对象,采用熵权法和主成分分析法探究L县稀土... 详细信息

稀土资源是重要的国家战略资源,但受开采技术的限制,在开采过程中会造成生态环境的破坏.研究稀土矿区周围景观格局的变化,对稀土矿区生态环境的修复具有积极意义.本次研究以L县稀土矿区为研究对象,采用熵权法和主成分分析法探究L县稀土矿区土地利用显性和隐性形态的变化特征及其影响因素,并结合景观格局指数,探究稀土矿区周围景观格局变化.结果显示:稀土矿区周围林地面积呈增加趋势,且集聚程度增加;耕地破碎度减少,其他地类破碎度增加;L县土地利用隐性形态与经济发展速度存在正向关系,土地利用隐性形态指数时间上呈现出不同增速态势.通过本次研究,可以直观看出稀土矿区周围景观格局的变化情况和土地隐性转型模式,为之后的矿区开采和治理工作提供理论借鉴.

关键词：土地利用隐性形态景观格局指数稀土矿区南方丘陵山区

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煤炭地下气化煤系地层含水性识别及含水量预测测井评价方法

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中国煤炭 2022年第7期48卷 27-33页

作者：郝丽萍郭祥光马建坡王伟吴存艳尚勇胡博中国石油集团测井有限公司天津分公司天津市滨海新区300280

准确判别气化目标煤系地层含水性和预测其含水量对煤炭地下气化工程成功与否具有重要作用。通过实验室煤芯及顶底板岩样岩石物理实验,分析了气化目标煤岩及顶底板岩石孔隙结构,利用实验室煤芯等温吸附实验和含气量测试结果综合判定,实... 详细信息

准确判别气化目标煤系地层含水性和预测其含水量对煤炭地下气化工程成功与否具有重要作用。通过实验室煤芯及顶底板岩样岩石物理实验,分析了气化目标煤岩及顶底板岩石孔隙结构,利用实验室煤芯等温吸附实验和含气量测试结果综合判定,实验区煤岩煤层气处于吸附状态,且煤储层孔隙都被地层水填充;通过容积法计算煤岩含水体积并预测煤岩含水量,根据补偿中子测井测量原理,通过体积模型计算储层可动水体积,并判断实验区煤岩底板含水性;利用实验室岩芯实验确定岩电参数,准确求取底板岩层含水饱和度,利用容积法计算储层含水体积,从而预测煤岩底板含水量;通过测井方法判别气化目标煤系地层含水性和预测其含水量,为煤炭地下气化工程提供测井技术支撑。

关键词：煤炭地下气化煤系地层顶底板储层测井方法含水量预测

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Enhanced hydrothermal stability of Cu-SAPO-34 with an ultrathin TiO_(2)coated by atomic layer deposition for NH3-SCR

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Science China(Technological Sciences) 2022年第10期65卷 2325-2336页

作者： TIAN HeYuan XI WenChang ZHANG YiBo SUN LiWei LIU Peng WU Fan YANG guo guo Feng YANG xiangguang State Key Laboratory of Rare Earth Resource Utilization Jilin Province Key Laboratory of Green Chemistry and ProcessChangchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China School of Applied Chemistry and Engineering University of Science and Technology of ChinaHefei 230026China College of Materials Sciences and Engineering Henan Institute of TechnologyXinxiang 453000China Ganjiang Innovation Academy Chinese Academy of SciencesGanjiang 341000China

Reducing pollution and carbon emissions is an important step toward peaking CO_(2)emissions before 2030 and reaching carbon neutrality before 2060,and heavy diesel vehicle pollution,particularly nitrogen oxides(NOx)emissions,is an essential ***-34 is a CHA-type small pore molecular sieve with excellent ammonia(NH_(3))selective catalytic reduction(NH_(3)-SCR)catalytic activity,but it cannot be stored or applied because of severe degradation caused by low-temperature hydrothermal *** improve the hydrothermal stability,TiO_(2)was coated on the surface of Cu-SAPO-34 by the ALD method to form a uniform *** this ultrathin TiO_(2)nanolayer has little effect on NH_(3)-SCR catalytic activity of Cu-SAPO-34,the resistance to low-temperature hydrothermal aging in liquid water at 80℃for 24 h has greatly been improved.A study carried out by SEM,XRD,NH_(3)-TPD,and EPR,showed that the ultra-thin TiO_(2)nanolayers were covered uniformly and hydrolysis of frameworks silicon and the migration of Cu^(2+)was *** method has some implications for the future preparation of highly robust Cu-SAPO-34 catalysts for industrial *** research could inspire the development of highly robust CuSAPO-34 catalysts to control the NOx emissions from diesel engines.

关键词： selective catalytic reduction chabazite zeolite catalyst Cu-SAPO-34 low-temperature hydrothermal stability atomic layer deposition

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Selective laser melted high Ni content TiNi alloy with superior superelasticity and hardwearing

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Journal of Materials Science & Technology 2022年第21期116卷 246-257页

作者： Hui Shen Qingquan Zhang Ying Yang Yang Ren Yanbao guo Yafeng Yang Zhonghan Li Zhiwei Xiong xiangguang Kong Zhihui Zhang Fangmin guo Lishan Cui Shijie Hao State Key Laboratory of Heavy Oil Processing China University of PetroleumBeijing 102249China The Key Laboratory of Bionic Engineering(Ministry of Education)and the College of Biological and Agricultural Engineering Jilin UniversityChangchun 130025China Department of Physics City University of Hong KongKowloonHong KongChina College of Mechanical and Transportation Engineering China University of PetroleumBeijing 102249China State Key Laboratory of Multiphase Complex Systems Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China

TiNi alloys with high content Ni(52-55 at.%)are perfectly suitable for preparing wear-and corrosionresistant parts that service on the space station,spacecraft,and submarine,because of their superior superelasticity,high strength,and ***,the fabrication of complicated Ni-rich TiNi parts by the traditional machining method often faces problems of poor precision,low efficiency,and high *** this work,we succeed in preparing an excellent Ti_(47)Ni_(53) alloy by selective laser melting(SLM),and thus,open a new way for the efficient and precise formation of complicated Ni-rich TiNi parts with superelasticity and *** optimized processing window for compact parts without defects is *** elaborately fabricated Ti_(47)Ni_(53) alloy exhibited a breaking strain of 11%,a breaking stress of 2.0 GPa,a superelastic strain of 9%,and a better hardwearing than that of casting and quenched Ti_(47)Ni_(53) ***,the microstructure,phase transformation,and deformation,as well as their influence mechanisms are investigated by in situ transmission electron microscope(TEM)and high-energy X-ray diffraction(HE-XRD).The results obtained are of significance for both fundamental research and technological applications of SLM-fabricated high Ni content TiNi alloys.

关键词： Selective laser melting High Ni content TiNi Superelasticity Wear In situ high-energy X-ray diffraction Microstructure

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基于PIES观测东沙群岛附近声传播变化

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应用海洋学学报 2024年第2期43卷 333-341页

作者：郭平徐永生黄超张林张庆君张利强彭泳卿张祥光徐立军王黎明袁延茂马树青杨亮尹善明中国科学院海洋研究所山东青岛266071 中国科学院大学北京100049 崂山实验室山东青岛266071 海军潜艇学院海军战术水声数据中心山东青岛266071 中国空间技术研究院遥感卫星总体部北京100094 北京遥测技术研究所北京100076 北京理工大学北京100081 中国人民解放军海军工程大学湖北武汉430033 92859部队天津300061 国防科技大学气象海洋学院湖南长沙410073 91001部队北京100181 91650部队广东广州510200

本研究旨在将PIES观测数据应用于海洋水声环境的监测。利用一次南海PIES观测数据,反演得到温盐剖面,进而计算声场信息。结合观测期间的暖涡及台风事件对反演及计算结果进行了分析验证。结果表明,PIES能够在长期连续观测中较为敏感地捕... 详细信息

本研究旨在将PIES观测数据应用于海洋水声环境的监测。利用一次南海PIES观测数据,反演得到温盐剖面,进而计算声场信息。结合观测期间的暖涡及台风事件对反演及计算结果进行了分析验证。结果表明,PIES能够在长期连续观测中较为敏感地捕获上层水体及表面声道的变化特征,为水声通信、探测及潜航路径规划等提供参考,在水声研究及海洋军事环境保障中都具有良好的应用前景。

关键词：海洋声学 PIES 声传播表面声道截止频率声速剖面

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