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粉煤灰基地聚物水泥固化重金属和放射性废物研究现状及发展趋势

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原子能科学技术 2008年第12期42卷 1086-1091页

作者：安金鹏卢忠远严云西南科技大学材料科学与工程学院四川绵阳621002

安全有效地处置重金属废物和放射性废物是世界各国关注的问题,也是现代经济可持续发展的重要保证。粉煤灰基地聚物水泥具有优良的性质,在固化重金属和放射性废物方面有很好的前景。文章概述地聚物水泥及其反应过程、水化产物,着重阐述... 详细信息

安全有效地处置重金属废物和放射性废物是世界各国关注的问题,也是现代经济可持续发展的重要保证。粉煤灰基地聚物水泥具有优良的性质,在固化重金属和放射性废物方面有很好的前景。文章概述地聚物水泥及其反应过程、水化产物,着重阐述粉煤灰基地聚物水泥固化重金属放射性废物的研究进展,并论述了当前存在的主要技术问题。

关键词：粉煤灰地聚物水泥重金属放射性废物

A promising method for recovery of LiMn_(2)O_(4) and graphite from waste lithium-ion batteries: Roasting enhanced flotation

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Journal of Central South University 2022年第9期29卷 2873-2887页

作者： HAN Jun-wei CHEN Ling-ling zhong Xue-hu WEI Xu-yi QIN Wen-qing School of Minerals Processing&Bioengineering Central South UniversityChangsha 410083China Department of Chemical and Materials Engineering University of AlbertaEdmonton T6G 1H9Canada

In this study,a roasting enhanced flotation process was proposed to recover LiMn_(2)O_(4) and grapite from waste lithium-ion batteries(LIBs).The effects of roasting temperature and time on the surface modification was investigated,and a series of analytical technologies were used to reveal process *** results indicate that LiMn_(2)O_(4) can be effectively separated from graphite via flotation after the *** flotation grade of LiMn_(2)O_(4) was significantly increased from 63.10%to 91.36%after roasting at 550℃for 2 *** TG-DTG analysis demonstrates that the difficulty in flotation separation of LiMn_(2)O_(4) from graphite is caused by the organic binder and electrolytes coating on their *** XRD,SEM,XPS,and contact angle analyses confirm that the organic films on the surfaces of those materials can be effectively removed by roasting,after which the wettability of LiMn_(2)O_(4) is regained and thus the surface wettability difference between the cathode and anode materials is increased *** closed-circuit flotation test indicates that a LiMn_(2)O_(4) sample with high grade of 99.81%is obtained,while the recovery of LiMn_(2)O_(4) is as high as 99.40%.This study provides an economical and eco-friendly way to recycling waste LIBs.

关键词： spent lithium-ion battery resource recycling roasting surface modification flotation

Synthesis of novel hydrated ferric oxide biochar nanohybrids for efficient arsenic removal from wastewater

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Rare Metals 2022年第5期41卷 1677-1687页

作者： Tong Zhu yun Zhang Yu Chen Jun-Liang Liu Xiao-Li Song College of Chemistry and Chemical Engineering Yangzhou UniversityYangzhou 225002China

Hydrated ferric oxide(HFO)has high adsorption efficiency for As(Ⅲ).However,its high self-aggregation usually reduces the efficiency and limits the scaledup ***,biochar(BC),with large surface area and amounts of surface functional groups was used to tune the loading and distribution of HFO to prepare an efficient adsorbent(HFO/BC)via in-situ synthesis *** influence of the mass ratio of iron salt to BC on HFO/BC morphology was investigated,and the mechanism was *** results showed that novel HFO was formed and distributed uniformly on the surface of BC when the mass ratio of iron salt to BC was 5:*** adsorption kinetics and isotherms studies show that the novel HFO/BC(5:1)composite can fast treat As(Ⅲ)with a high adsorption capacity of 104.55 mg·g^(-1),indicating that it is a potential material for removing arsenic from polluted water.

关键词： Hydrated ferric oxide Arsenic removal Biochar Water treatment

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现代服务业集聚区经济特性及其启示

热带地理 2012年第5期32卷 515-520,574页

作者：钟韵刘微暨南大学城市与区域经济研究中心广州510632

通过对文献梳理,在界定现代服务业集聚区概念的基础上,借鉴制造业集群的经济特性,结合服务业的行业特色,对现代服务业集聚区的根植性、网络性和创新性3个经济特性展开了分析,进而从培育现代服务业集聚区经济特性的角度,对中央商务区(CBD... 详细信息

通过对文献梳理,在界定现代服务业集聚区概念的基础上,借鉴制造业集群的经济特性,结合服务业的行业特色,对现代服务业集聚区的根植性、网络性和创新性3个经济特性展开了分析,进而从培育现代服务业集聚区经济特性的角度,对中央商务区(CBD)、高新科技园、文化创意产业园三类现代服务业集聚区的培育管理机制进行了分析,研究发现,CBD应该加强区内金融服务机构与专业服务机构的网络性建设,并由此强化区内企业的根植性;高新科技集聚区应加强网络性的建设,形成由相关科技服务组成的科技综合体;文化创意产业集聚区的建设则首先应培养区内企业与机构的创新性。

关键词：现代服务业集聚区界定经济特性建设策略

最近50年来莱州湾东部典型砂岸潮上带土地利用变化研究

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海洋与湖沼 2015年第2期46卷 410-419页

作者：仲少云王庆战超李雪艳王昕鲁东大学海岸研究所烟台264025

以不同时期测量和成像的地形图和高分辨率遥感影像为数据源,综合使用野外调查、遥感(RS)、全球定位系统(GPS)和地理信息系统(GIS)等方法,对最近50多年来莱州湾东部砂岸典型岸段(界河口—刁龙嘴)的土地利用变化进行研究。结果表明,最近5... 详细信息

以不同时期测量和成像的地形图和高分辨率遥感影像为数据源,综合使用野外调查、遥感(RS)、全球定位系统(GPS)和地理信息系统(GIS)等方法,对最近50多年来莱州湾东部砂岸典型岸段(界河口—刁龙嘴)的土地利用变化进行研究。结果表明,最近50多年来,莱州湾东部海岸土地利用/土地覆被变化显著,土地利用类型转化的总趋势是风沙地、林地、耕地向养殖池及居民地转化。从20世纪90年代初以来,该岸段潮上带风沙地大部分已为养殖池(塘、大棚)等所覆盖,在沿海防护林和海域之间新出现了一条平行于岸线、基本连续展布的水产养殖设施带,其外侧建有高出当地最高潮位的防浪堤。潮上带土地覆被的如此深刻变化,必然深刻地改变风暴潮作用时的水动力边界条件,导致风暴潮作用过程中沿水下岸坡—海滩—潮上带方向的能量分布发生调整,进一步会对海岸地貌及冲淤发生的范围、强度、性质和形式等带来变化。因此,大面积的潮上带土地利用可能是莱州湾东部砂岸,最近30年来海岸地貌冲淤演变的重要影响因素之一,这为今后深入研究并预测该段海岸地貌冲淤变化提供了新的视角。

关键词：莱州湾东部潮上带土地利用/土地覆被变化温带季风砂岸工厂化水产养殖设施

Synthesis and Structural Characterization of Co(Ⅱ) Coordination Polymer [Co(-phth)(imi_)2]_n

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Chinese Journal of Structural Chemistry 2003年第3期22卷 313-317页

作者： CHEN yun LIU Ping② LIU qing-Yan WANG Jian CHENG Wen-Dan (Fujian Institute of Research on the Structure of Matter, The Chinese Academy of Sciences, Fuzhou, Fujian 350002, China) Fujian Institute of Research on the Structure of Matter The Chinese Academy of Sciences Fuzhou Fujian 350002 China

A new cobalt(Ⅱ) complex [Co(-phth)(imi)2]n (phth = o-phthalato, imi = imidazole) has been synthesized by the reaction of CoCl2 with disodium o-phthalate and imidazole. The crystal structure of the compound has been determined by single-crystal X-ray diffraction. The crystal is of monoclinic system, space group Pn with a = 8.405(1), b = 9.995(1), c = 9.996(2) ? b = 104.479(2), V = 813.0(2) ?, Dc = 1.467 g/cm3, C14H12N4O4Co, Mr = 359.21, F(000) = 366, m = 1.079 mm-1, Z = 2, R = 0.0483 and wR = 0.1209 for 1583 observed reflections (I > 2s(I)). In the title complex, the Co(Ⅱ) ions are bridged by o-phthalate ligands in a bidentate mode, producing a zigzag infinite chain structure. Each four-coordinated cobalt(Ⅱ) center was coordinated by two oxygen atoms and two nitrogen atoms to give a distorted tetrahedral geometry. The chains are linked by hydrogen bonds between oxygen atoms belonging to carboxylate groups and hydrogen atoms of imidazole molecules, forming an unusual two-dimensional coordination polymer.

关键词： cobalt(Ⅱ) complex o-phthalate complex synthesis crystal structure coordination polymer

基于Matlab复合材料磨损表面形貌W-M分形模型及其模拟

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煤矿机械 2007年第10期28卷 37-38页

作者：乔忠云淮海工学院东港学院江苏连云港222069

按照Weierstrass-Mandelbrot函数模型,用Matlab软件进行编程,对Weierstrass-Man-delb函数进行仿真模拟,并与磨损表面轮廓进行了比较。用尺码法、结构函数法、盒维数法、方差法和均方根法对模拟的轮廓进行了分形维数计算,可以得出结论,... 详细信息

按照Weierstrass-Mandelbrot函数模型,用Matlab软件进行编程,对Weierstrass-Man-delb函数进行仿真模拟,并与磨损表面轮廓进行了比较。用尺码法、结构函数法、盒维数法、方差法和均方根法对模拟的轮廓进行了分形维数计算,可以得出结论,确定采用结构函数法作为计算磨损表面轮廓曲线的计算方法。

关键词：磨损表面分形结构函数无标度区

Synthesis of hexagonal boron nitride films by dual temperature zone low-pressure chemical vapor deposition

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Chinese Physics B 2022年第8期31卷 512-516页

作者： Zhi-Fu Zhu Shao-Tang Wang Ji-Jun Zou He Huang Zhi-Jia Sun qing-Lei Xiu zhong-Ming Zhang Xiu-Ping Yue Yang Zhang Jin-Hui Qu Yong Gan School of Information Engineering Zhengzhou University of TechnologyZhengzhou 450044China Engineering Research Center of Nuclear Technology Application(East China University of Technology Ministry of EducationNanchang 330013China State Key Laboratory of Particle Detection and Electronics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China Engineering Department Lancaster UniversityLancasterLA14YWUnited Kingdom

Hexagonal boron nitride(h-BN)films are synthesized by dual temperature zone low-pressure chemical vapor deposition(LPCVD)through using a single ammonia borane precursor on non-catalytic c-plane Al_(2)O_(3)*** grown films are confirmed to be h-BN films by various characterization ***,the growth rates and crystal quality of h-BN films at different positions in the dual temperature zone are *** is found that the growth rates and crystal quality of the h-BN films at different positions on the substrate are significantly *** growth rates of the h-BN thin films show their decreasing trends with the rearward position,while the crystal quality is *** work provides an experimental basis for the preparation of large area wafer thick h-BN films by LPCVD.

关键词： ammonia borane dehydrogenation h-BN dual temperature zone

Different dissecting orders of the pulmonary bronchus and vessels during right upper lobectomy are associated with surgical feasibility and postoperative recovery for lung cancer patients

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Chinese Journal of Cancer 2017年第10期36卷 468-477页

作者： Hao-Ran Zhai Xue-Ning Yang Qiang Nie Ri-Qiang Liao Song Dong Wei Li Ben-Yuan Jiang Jin-Ji Yang qing Zhou Hai-Yan Tu Xu-Chao Zhang Yi-Long Wu Wen-Zhao zhong Graduate School Southern Medical University Guangdong Lung Cancer Institute Guangdong General Hospital&Guangdong Academy of Medical Sciences

Background: Right upper lobectomy(RUL) for lung cancer with di erent dissecting orders involves the most vari?able anatomical structures, but no studies have analyzed its e ects on postoperative recovery. This study compared the conventional surgical approach, VAB(dissecting pulmonary vessels first, followed by the bronchus), and the alter?native surgical approach, a BVA(dissecting the posterior ascending arterial branch first, followed by the bronchus and vessels) on improving surgical feasibility and postoperative recovery for lung cancer ***: According to the surgical approach, consecutive lung cancer patients undergoing RUL were grouped into a BVA and VAB cohorts. Their clinical, pathologic, and perioperative characteristics were collected to compare periop?erative ***: Three hundred one patients were selected(109 in the a BVA cohort and 192 in the VAB cohort). The mean operation time was shorter in the a BVA cohort than in the VAB cohort(164 vs. 221 min, P 0.05). The median disease?free survival was comparable for all patients in the two cohorts(not arrived vs. 41.97 months) and for patients with disease recurrences(13.25 vs. 9.44 months)(both P > 0.05). The recurrence models in two cohorts were also comparable for patients with local recurrences(6.4% vs. 7.8%), distant metastases(10.1% vs. 8.3%), and both(1.8% vs. 1.6%)(all P > 0.05).Conclusions: Dissecting the right upper bronchus before turning over the lobe repeatedly and dissecting veins via the a BVA approach during

关键词： Lung cancer Dissecting order Video-assisted thoracic surgery Pulmonary veins Bronchus