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Removal of Strontium from Aqueous Solution by Diatomite

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Removal of Strontium from Aqueous Solution by Diatomite

Serving High-Level Opening up with "TaxExpress"

2011 IEEE International Conference on Waste Recycling,Ecology and Environment(ICWREE 2011)

作者： Wei ZHANG1 Faqin DONG2 * Bo WU3 Huanqing SONG4 Hailiang DONG5 1 Analytical and Testing Center Southwest University of Science and Technology Mianyang china 2 Key Laboratory of Solid Waste Treatment and Resource Recycle Ministry of Education Mianyang china 3 School of National Defense Science and Technology Southwest University of Science and Technology Mianyang china 4 School of Environment and Resource Southwest University of Science and Technology Mianyang china 5 department of geology Miami University Oxford U.S.A

Diatomite was investigated as an adsorbent to remove strontium （II） from aqueous solution. The results demonstrate that diatomite can be successfully used as an adsorbent for the removal of heavy metal/ radionuclide ions from aqueous solution. PH value of the solution was an important factor for both solution chemistry of metals and adsorbent. The adsorption capacity of diatomite with strontium ions was better in acid condition. The removal rate rose as the dosage of diatomite increased, and declined as the concentration of strontium ions increased. While, the adsorption capacity declined as the dosage of diatomite increased, and rose as the concentration of strontium ions increased. The kinetics research indicated that the adsorption of strontium ions on diatomite was a rapid process. The removal rate and adsorption capacity could reach 95% of adsorption equilibrium in 60 minutes. The experimental results were fitted well to PSO kinetics model.

关键词： diatomite strontium ions adsorption PSO model

来源： cnki会议评论

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Belt and Road Initiative Tax Journal 2024年第1期 97-105页

作者： International Taxation department, State Taxation Administration,the People's Republic of china International Taxation department State Taxation Administrationthe People's Republic of China

Over the past decade,the Chinese tax authorities have been actively supporting the development of the Belt and Road Initiative,by creating a unique cross-border tax and fee service model with Chinese characteristics,which has laid a solid foundation for the establishment of the "TaxExpress" cross-border service *** October 2023,the State Taxation Administration of china(STA) officially launched the "TaxExpress" brand,focusing on one service matrix,two service teams,three service mechanisms,and four knowledge *** brand aims to enhance cooperation between ministries and commissions,promote international exchanges,and establish a framework for effective cross-border tax and fee *** forward,the STA will continue to leverage existing resources to support high-level opening up,by enhancing brand value,improving measures for international tax and fee services,expanding cross-border tax and fee services,strengthening professional talent teams,so as to develop a cross-border tax and fee service system that combines Chinese characteristics with international best practices.

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“有效降低全社会物流成本”研讨会专家观点综述

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中国流通经济 2024年第5期38卷 3-17页

作者：本刊编辑部《中国流通经济》编辑部

2024年2月24日,习近平总书记主持召开中央财经委员会第四次会议,指出物流是实体经济的“筋络”,强调必须有效降低全社会物流成本,增强产业核心竞争力,提高经济运行效率。基于此,2024年4月24日,北京物资学院党委宣传部、杂志社、科研处... 详细信息

2024年2月24日,习近平总书记主持召开中央财经委员会第四次会议,指出物流是实体经济的“筋络”,强调必须有效降低全社会物流成本,增强产业核心竞争力,提高经济运行效率。基于此,2024年4月24日,北京物资学院党委宣传部、杂志社、科研处联合主办了“有效降低全社会物流成本”研讨会。本次研讨会邀请我国流通物流领域的专家学者,围绕物流服务实体经济和人民群众、物流成本构成、交通运输体系改革、统一高效物流市场构建和现代商贸流通体系完善等问题,发表观点,为探索有效降低全社会物流成本可行路径,构建现代流通体系提供理论支持和实践指导。本刊编辑部对专家阐述的主要观点进行了归纳整理,以飨读者。

关键词：全社会社会物流成本新质生产力流通体系降本增效

Discovery of bipinnatifid fronds of Protoblechnum contractum(Gu et Zhi)

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Chinese Science Bulletin 1999年第4期44卷 381-383页

作者： SUN Bainian and SHEN Guanglong department of geology, Lanzhou University, Lanzhou 730000, china department of geology, Northwest University, Xi’an 710069, china department of geology Lanzhou University Lanzhou China department of geology Northwest University Xi’an China

IN Permian floras of china, a dispute over the relationship among the Protoblechnum and other similar plants such as Compsopteris, Glenopteris and Supaia has been existing for a long time, and moreover it has not been completely solved up to now. Halle placed a few simple pinnate fronds from the Shihhotze Formation in the genus Protoblechnum and named them Protoblechnum Wongii Halle 70 years ago when he was studying the fossil plants from the Late Palaeozoic strata in Shanxi, china. He did not think forked or unforked fronds as an important dividing genus condition in discussing the distinction among Protoblechnum and other relative fossils. Zalessky alSO found some specimens similar to Chinese Protoblechnum while he studied the Permian fossil plants from Russia. However, he did not approve of

关键词： very over Discovery of bipinnatifid fronds of Protoblechnum contractum Gu et Zhi

Tectonic Units and Their Fundamental Characteristics on the Northern Margin of the Alxa Block

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Acta Geologica Sinica(English Edition) 1993年第4期67卷 373-385页

作者： Wu Tairan geology department, china University of Geosciences, Beijing and He Guoqi geology department, Peking University Jiang Minxi geology department China University of Geosciences Beijing China

The northern margin of the Alxa block is the junction of a tectonic units. Four first-order tectonic units are distinguished: 1. the Yagan structural zone characteristic of an immature island arc; 2. the Zhusileng-Hangwula structural zone, which was a passive continental margin in the Early Palaeozoic and was transformed into an active continental margin in the Late Palaeozoic;3. the Shalazha structural zone characteristic of a mature island arc; 4. the Nuru-Langshan structural zone, which was a Proterozoic orogenic belt and later evolved into an extensional transtional crust in the Palaeozoic. The above-mentioned tectonic units differ remarkably in sedimentary formations, magmatic rock associations, metamorphism and geochemistry and are bounded by faults between one another.

关键词： Alxa structural zone boundary rock association

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DUAL-FREQUENCY IP

中国有色金属学会会刊：英文版 1993年第4期3卷 1-10页

作者： He,Jishan department of geology,Central Sough University of Technology,Changsha 410083,china

The dual-frequency(DF)IP is a new kind of frequency domain IP *** only is thedual-frequency current transmitted simultaneously but the electric potential difference due to dualfrequency current is measured *** paper discusses the principle and charateristicof DF current, DF current can be formed by two rectangular currents which must be coherent orelse false Percent Frequency Effect(PEE)will *** currents with different waveforms areequivalent in the ability of detecting IP *** current has much less effect of DFIP than on conventional variable frequency method;in fact,there is no need to stabilize currentin DF IP *** are many differences between harmonic contents of DF current and thatof rectangular wave used in variable frequency method,but theoretical analysis,labaratory mod-eling and field data all show that the anomalies of both DF and variable frequency method are sim-liar in character and close in *** IP can match variable frequeney IP and time domain IPin the ability of detecting IP anomaly,furthermore,dual-frequency IP measurements are morerapid,more accurate and more simple in operation.

关键词： dual frequency IP percent frequency effect IP anomaly

ON　THE　CARBONIFEROUS－PERMIAN　BOUNDARY

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Journal of Central South University 1996年第1期8卷 60-62页

作者： Zhang Zuqi(department of geology, Central South University of Technology, Changsha 410083, china) Dezpartment of geology Central South University of Technology Changsha 410083 China

An objection has been lodged against the traditional P/C boundary which were still upholded by International Subcommission on Permian Stratigraphy, International Commission on Stratigraphy, IUGS. And the rationali... 详细信息

关键词： stratigraphy stratigraphic boundary Carbonifeous Permian allglobe.〖

METALLOGENIC CHARACTERISTICS AND OREPROSPECTINGFUTURE OF PRECAMBRIAN GOLD DEPOSITSIN MUFUJIULING DISTRICT

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Journal of Central South University 1996年第1期8卷 11-13页

作者： Wu Yanzhi(department of geology, Central South University of Technology,Changsha 410083, china) department of geology Central South University of Technology Changsha 410083 China

MufuJiuling district is an important placer gold producing land since the ancient time. In recent years, some primary gold deposits and mineralizations, e. g., Huangjindong and Tulongshan gold deposits, have been found. But the metallogenic conditions and regularities as well as the oreprospecting future remain to be recognized. Through the study on the metallogenic background and condition, the auriferous source bed and the mineralizing characteristics, three types of primary gold deposits are confirmed to be prospective in this district and some key problems about their prospecting and evaluating are put forward.

关键词： primary gold deposit PreCambrian age metallogenic marker

Electrical Properties of Expanded Graphite Intercalation Compounds

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Journal of Materials Science & Technology 2001年第3期17卷 371-374页

作者： Xiuyun CHUAN department of geology, Peking University, Beijing 100871, china Daizhang CHEN and Xunruo ZHOU department of Materials Science, china University of Geosciences, Beijing 100083, china E-mail: cxyljhcj@*** Dept. of Geol. Beijing Univ. Beijing 100871 China

The intercalation compounds of CuCl2 were synthesized with expanded graphite, whose magnitude of the electrical conductivity is about 10(3)S(.)cm(-1). Their electrical conductivity is 3 similar to6 times as high as that of the expanded graphite, and about 10 times as high as that of GIC made of the non-expanded graphite. The microanalysis results of chemical compounds by X-ray energy spectrum scanning of TEM testified that the atomic ratio of chloride and cupric is nonstoichoimetric. The multivalence and exchange of electrovalence of the cupric ion was confirmed by the XPS-ESCA. Vacancy of chlorine anion increases the concentration of charge carrier. The special stage structure, made of graphite and chloride, produces a weak chemical bond belt and provides a carrier space in the direction of GIC layer. These factors develop the electrical properties.

关键词： In Ph Electrical Properties of Expanded Graphite Intercalation Compounds Graphite ESCA