两种不同颜色C6H4（NH2）2·2HCl的合成及光谱研究          下载免费PDF全文

宋富根  李丽娟  鲁晓明  聂锋  曾忠民  姬连敏  刘志启  冯瑛 《盐湖研究》2009,17(1)

室温下,于CH3OH和H2O的混合溶剂中,钨酸钠存在下邻苯二胺和盐酸反应合成了棕色和红色两种不同颜色的C6H4（NH2）2·2HCl晶体,X-射线单晶衍射分析,晶体属单斜晶系,空间群为C2／c,a=0．7339（2）nm,b=1．4535（5）nm,c=0．8009（3）nm,β=94．1341（5）°,V=0．8522（5）nm^3,z=4,R1=0．0247,WR2=0．0684。奇特的是棕色晶体与红色晶体均为邻苯二胺盐酸盐,具有相同的晶体结构和IR光谱,但UV光谱呈现出差异。  相似文献   

长江口滨岸湿地沉积物对上覆水体中无机氮的净化能力估算   总被引：1，自引：0，他引：1  

王军  陈振楼  王东启  孙小静  许世远 《地理学报(英文版)》2009,19(4):447-460

Estuarine wetlands serve as a natural barrier to remove the land-generated pollut-ants and attenuate the pollutant load from the land to the sea. As one of the most important estuarine wetlands, the Yangtze estuarine wetlands have attracted particular interests in the biogeochemical studies of nutrients. The objectives of this study were to characterize the seasonal and spatial distribution of dissolved inorganic nitrogen (DIN) fluxes across the sediment-water interface; to calculate the total DIN fluxes in a year and different seasons; and to evaluate the DIN removing capability of the sediment in the tidal wetlands of the Yangtze Estuary. The spatial distribution of DIN fluxes shows complicated seasonal variations and spatial differences. The annual DIN fluxes range from -22.22 mmol N m-2 h-1 to 19.54 mmolN m-2 h-1, with an average of -1.48±1.34 mmol N m-2 h-1. The tidal wetlands in the Yangtze Estuary behave as a source of water DIN in spring when DIN is released from sediment into overlying water, and the released amount of DIN is 1.33×104 tons of nitrogen (T N). In sum-mer, autumn and winter, the sediment absorbs the DIN from the overlying water, and the absorbed amounts of DIN are 4.36×104 T N, 6.81×104 T N and 2.24×104 T N, respectively. The average amount of DIN in overlying water of the Yangtze Estuary is 52.6×104 T N yr-1, and the perennial average amount of DIN absorbed from the overlying water by the sediment is 12.1×104 T N yr-1. The annual DIN elimination rate of the tidal wetlands was 23.0%.  相似文献   

板块俯冲带水流体活动及其效应的定量化数值模拟          下载免费PDF全文

李忠海  杨舒婷  刘明启  皇甫鹏鹏 《地球科学》2019,44(12):3984-3992

为探讨水流体活动对板块俯冲隧道过程及大陆碰撞造山的制约作用,采用热力学和动力学耦合的数值模拟方法,建立了系统的数值模型.结果显示俯冲隧道内的混杂岩存在两种不同的折返路径:（1）平行于俯冲隧道斜向上折返,形成靠近缝合带的高压-超高压变质岩;（2）近垂直穿过上覆地幔楔侵入地壳深度.这两种差异性的模式主要受控于俯冲带热结构.俯冲带的温度结构控制俯冲隧道内水流体和熔体活动,从而影响上覆地幔楔的弱化程度,最终导致俯冲带内物质的不同运移过程和折返路径.同时,大陆俯冲碰撞带的岩石圈变形和拆沉作用均与俯冲带的流体-熔体活动所导致的岩石圈弱化息息相关.数值模拟结果极大促进了对于板块俯冲带流体-熔体活动及其动力学过程的理解.   相似文献   

巴彦高勒煤矿多相变沉积条件下煤层顶板含水层富水性特征     

王永国  王明  刘增平  徐新启  李建阳 《煤田地质与勘探》2019,(Z1)

在区域水文地质条件研究基础上,结合水文地质补充勘探及以往勘探成果进一步研究矿区、矿井及首采区地质条件,着重研究矿井直接充水含水层延安组和直罗组地层的沉积条件、沉积环境、孔隙度、渗透率、顶板水化学特征、覆岩结构特征,评价巴彦高勒矿井多相变沉积条件下顶板含水层富水性特征。结果表明:含水层砂体呈条带状分布,富水性受沉积环境影响分布不均,水量以静储量为主,动态补给有限。研究成果为巴彦高勒矿区顶板水疏放、导水裂缝带发育特征研究等提供依据。  相似文献   

变埋深条件下饱和土爆炸能量耦合系数的试验研究   总被引：1，自引：1，他引：0  

穆朝民  任辉启  李永池  辛凯 《岩土力学》2010,31(5):1574-1578

通过在? 2.5 m×5 m模拟爆炸装置中进行了饱和土爆炸试验。利用自由场试验研究了饱和土在不同埋设深度条件下的爆炸问题,得到了相应的爆炸破坏效应的宏观特征和压力实测波形,并对测试结果进行了分析,得到了饱和土中爆炸波传播规律,并通过试验得到耦合系数的试验数据,绘制了耦合系数曲线。实验结果表明,对于封闭爆炸最小比例埋深为2.62 m/kg1/3,当比例埋深大于2.62 m/kg1/3时,峰值压力与动量受比例埋深的影响不大,此时爆炸能量基本被封闭在饱和土中。  相似文献   

不同pH值下的珊瑚养殖实验          下载免费PDF全文

张艳灵  肖应凯  刘志启  王俊林  马云麒  刘玉秀  杨剑 《盐湖研究》2019,27(1):107-115

建立了一种科研用室内珊瑚养殖中新生长珊瑚培植方法,解决了养殖珊瑚中新生长珊瑚样品的培植和采集问题。按照所改进的珊瑚养殖技术和建立的新生长珊瑚培植方法,完成了在不同海水pH值环境下的珊瑚养殖实验,同时达到对养殖中研究参数控制的简化和有效的目的。测定了在养殖过程中各水化学参数的变化,获得了新生长的珊瑚样品,为利用硼同位素组成指示海洋环境的变化提供载体。  相似文献   

Extraction of Lithium from Salt Lake Brine using N523-TBP Mixture System     

时东  李丽娟  李晋峰  姬连敏  宋富根  彭小五  张利诚  张禹泽  李慧芳  宋雪雪  聂锋  曾忠民  刘志启  郭凡 《盐湖研究》2019,27(1)

In this work, problems encountered by tri-butyl phosphate (TBP) in the industrialization of lithium extraction from salt lake brine were discussed in detail. The lithium extraction behavior of N, N-bi-(2-ethylhexyl) acetamide (N523) was investigated, and its defect was analyzed in the view of practical application. The N523-TBP mixture extraction system was proposed to alleviate or avoid the defects that N523 and TBP met when they were used severally. The composition of this mixture extraction system was determined as 20%N523-30%TBP-50% kerosene. The effects of brine acidity, Fe/Li molarity ratio, phase ratio and chloride ion concentration on lithium extraction efficiency were discussed respectively. The operation conditions in single stage extraction were optimized as brine acidity=0.05 mol/L, Fe/Li molarity ratio=1.3 and phase ratio=2. The high concentration of chloride ion in brine was benefit for extraction of lithium. The structure of extracted complex was proposed as (LiFeCl4·nN523·mTBP)·(2-n)N523·(2-m)TBP (m+n=2) by chemical analysis and slope fitting methods. The extraction thermodynamic functions were calculated preliminarily, and the results suggested that the extraction process was an exothermic (ΔH<0) and spontaneous (ΔG<0) reaction, and the degree of disorder increased (ΔS>0) during the extraction process. This work will give some guidance to the lithium industry of Qinghai in both fundamental theory and practical application.  相似文献   

一种经验建模的客观分型方法及其应用   总被引：2，自引：0，他引：2  

张丰启  金保华 《南京气象学院学报》1999,22(1):69-74

介绍一种应用常规历史天气图资料进行天气学客观分的思路和方法,首先建立某种天气 若干环不充模型,然后确定各模型的判别条件和顺序,由计算机进行自动分型,和到各环流型样本,实现客观分型。此方法于威海市冬季分区降水预报系统 天气分型,卫水模型物理意义明确,识别近前和,系统自动化。指出了天气分型在数值预报产品释用中的重要性及应注意的问题。  相似文献   

水滑石类化合物研究及其在聚丙烯阻燃剂中的应用进展          下载免费PDF全文

宋雪雪  李丽娟  刘志启  姬连敏  聂锋  曾忠民  宋富根  时东  徐德芳  兰生杰  彭小五  张利诚 《盐湖研究》2016,24(4):66-72

水滑石类化合物是一种重要的无机材料,因其特殊的晶体化学性质,有良好的热稳定性、阻燃性和离子交换性,广泛应用于化工、材料、环保和医药等领域。综述了水滑石类化合物的结构、性质、制备方法及其优缺点,介绍了水滑石在聚丙烯(PP)阻燃剂中的应用进展,以及水滑石作为PP阻燃剂的优异性能,并指出了今后的发展方向。  相似文献   

用Moran几何因子设计反褶积滤波器     

仵杰  胡启 《地球物理测井》1990,14(2):140-147

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