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The mechanism,thermodynamics and kinetics of ion-exchange reactions between alkali,alkaline-earth and transition metal ions and zirconium phosphate and its derivatives ar...

本文综述了碱金属、碱土金属、过渡金属离子等与磷酸锆及其衍生物的离子交换反应机理、热力学和动力学特性,另外也讨论了发光金属配合物与磷酸锆的离子交换反应研究进展。

The mechanism, thermodynamics and kinetics of ion-exchange reactions between alkali, alkaline-earth and transition metal ions and zirconium phosphate and its derivatives are reviewed, progress in ion-exchange reaction between luminescent metal complex and zirconium phosphate is also discussed.

本文综述了碱金属、碱土金属、过渡金属离子等与磷酸锆及其衍生物的离子交换反应机理、热力学和动力学特性,另外也讨论了发光金属配合物与磷酸锆的离子交换反应研究进展。

With abroad congener technology photograph is compared, the compound function colophony of new research and development is measured to the adsorption of organic matter in liquid waste of printing and dyeing raise 1 times above, and fight contaminative ability to increase greatly.

与国外同类技术相比,新研发的复合功能树脂一般也称离子交换树脂(用化学法将高分子共聚物制成的有机单体颗粒的离子交换剂对印染废水中有机物的吸附(物质表面吸住周围介质中的分子或离子现象)量提高1倍以上,且抗污染能力大大增强。

Corbicula fluminea however affected the exchange of nutrient nitrogen across the sediment-water interface by the physiologic mechanism such as the excretion. Crabs such as Ilyoplax deschampsin changed the physical structure of the tidal flat sediments by the strong bioturbation, and increased the content of dissolved oxygen in the sediment by enhancing the touched area of sediment and air.

谭氏泥蟹主要通过生物扰动,增加沉积物-水-气三相界面之间的接触面积,促进沉积物界面附近营养盐物质交换过程;而软体动物河蚬则主要通过生理活动,影响潮滩沉积物中氮营养盐的界面扩散过程。

The adsorption equilibrium constants K1 and K2 were calculated by the isothermal equation of surface stepwise ion exchange.

用分级离子交换等温式求出了平衡常数K1和K2.pH值是影响吸附作用的主要因素,随着pH值的增大沉积物与稀土离子的交换吸附作用相应增强。

Based on the complexity of the sources for the sediments in the Okinawa Trough, the sequential extraction procedure was applied to the hydrothermal influenced sediments in the core H9 recovered from the middle Okinawa Trough. Five fractions, including exchangeable, bound to carbonates, bound to iron and manganese oxides, bound to organic matter, and residual were acquired. Based on detailed analysis for major, minor and rare earth element compositions, the distributions of the elements in various speciations of the sediments were determined and the controlling mechanism was discussed. The variations of hydrothermal signatures in the core, partitioned from the terrigenous, volcanic and biogenic materials, have been demonstrated and the accumulation rates of some elements were evaluated.

本文针对冲绳海槽多种物源沉积作用混杂的特征,采用顺序淋滤萃取方法对海槽中部受热液活动影响的H9岩芯沉积物进行了分离,将沉积物中分为可交换态、碳酸盐结合态、铁锰氧化物结合态、有机结合态和残渣态五个部分,并对各个结合态中常量、微量和稀土元素组成进行了分析,确定了不同元素在不同结合态中分配的比例,分析了控制不同元素进入沉积物的主要机制。

Contaminant cations such as calcium,magnesium,barium,strontium,and radium and anions such as fluoride ,nitrate,fulvates,humates,arsenate,selenate,chromate ,and anioic complexs of uranium can be removed from water by using ion exchange or adsoption onto activiated alumina.

具有污染能力的像Ca,Mg,Ba,Sr,Ra的阳离子,和像氟化物,硝化物,黄酸物,腐质酸物,砷酸盐,硒酸盐和铬酸盐的负离子以及像铀一样的负离子复合物可以通过离子交换和离子吸附从水中排除。

This paper is a generalization and summation of some new progress in marine chemistry in the recent decade. The principal contents consist of seven parts:1. Oceanological survey. The oceanological survey covered the China Seas, the Pacific Ocean and the Antarctic Ocean.2. Interaction of minor elements and suspended matter in seawater and the theory of in-terfacial stepwise ion/coordination partical exchange.3. Effect of organic matters on the liquid-solid interfacial exchange and the rule of left-righ...

本文对近十年来海洋化学的若干新进展作了总结,主要包括下述7方面:(1)海洋调查,包括中国近海、太平洋和南极等;(2)海水中微量元素-固体粒子的相互作用和界面分级离子/配位子交换理论;(3)有机物对液-固界面交换的影响和S-型曲线左右移动规律;(4)海水化学模型发展的三个新趋势;(5)海水中金属的络合容量和金属-天然有机配位体络合物的条件稳定常数;(6)海洋有机化学和海洋生物化学;(7)结论,对海洋化学发展的四个特点作了分析和讨论。

When PEN and PET were melt blended, however, transesterification between two homopolymers would take place and the resultant product may be not crystallizable.

PET/PEN共混物在熔融共混时可能会发生酯交换反应,生成嵌段共聚物或无规共聚物,从而对PET/PEN共混物的结晶性能和热性能产生不利的影响。

Chemical randomized interesterification of lard catalyzed by sodium methoxide and the effect of reaction temperature, time and catalyst dosage on the interesterification degree were investigated in this paper.

以猪油为反应底物,试验了以甲醇钠为催化剂的化学随机酯交换及其反应温度、时间、催化剂浓度对酯交换程度的影响。

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