共搜索到525条信息,每页显示10条信息,共53页。用时:0小时0分0秒453毫秒
μg/g痕量Cd和0.5~100 μg/g痕量Te的测定,测定值与标准值吻合较好,RSD小于20%. 关键词:电感耦合等离子体质谱法; 高温合金; 镉; 碲; inductively coupled plasma mass spectrometry; superalloy; cadmium; tellurium; [全文内容正在添加中] ......
+)的干扰可采用抗坏血酸-巯基棉分离去除.方法用于测定河水中镉,结果与原子吸收光谱法一致.相对标准偏差为1.7%~2.0%(n=5),回收率为98%~100%. 关键词:分光光度法; 镉; 离子缔合物; 碘化钾; 吖啶橙; spectrophotometry; cadmium; ion-association complex; potassium iodide; acridine orange......
活力指数明显提高;同时,可提高根尖有丝分裂指数,增强α-淀粉酶活性,提高抗氧化能力,使MDA含量显著降低.然而,100~150 mg · L~(-1)的镨浸种后,种子活力及幼苗生长下降,根尖细胞分裂指数,α-淀粉酶活性降低,MDA含量增加. 关键词:镉; 镨; 小麦; 种子萌发; 缓减效应; 生理特性; 稀土; cadmium; praseodymium; wheat; alleviating......
CdS掺杂研究进展 董东1,李江波1,胡文成1 (1.电子科技大学电子薄膜与集成器件国家重点实验室,成都,610054) 摘要:介绍了国内外关于硫化镉(Cadmium sulfide,CdS)在掺杂改性方面的研究现状,以及各种掺杂对硫化镉特性的影响,重点讨论了掺杂浓度及掺杂种类对硫化镉结构和光学特性的影响,论述了材料组成,微观结构与特性之间的关系.最后提出了在实际应用中存在的问题. 关键词:硫化镉; 掺杂; 光学特性; 结构特性; [全文内容正在添加中] ......
论了吸附机理.
关键词: 亚胺基二乙酸树脂; 镉; 动力学; 热力学; 吸附; 机理 中图分类号: O614.33
文献标识码: A
Sorption behavior and mechanism of
iminodiacetic acid resin for cadmium
MO Jian-jun1, XIONG Chun-hua2
(1. Department... spectrometry.
Key words: iminodiacetic acid resin; cadmium; kinetics; thermodynamics; sorption; mechanism
+, Ni2+ and Co2+ in actual zinc electrolytes with satisfactory results. The method is simple, sensitive and rapid. Key words: zinc electrolyte; copper; cadmium; nickel; cobalt; second derivative wave...+ in the alkaline buffer. For example, when the concentration of the Zn2+ is 0.26 mol/L, the cadmium peak current is reduced by approximately 100 times. However, the cadmium current in acidic solutions......用示波极谱二阶导数波同时测定锌电解液中微量铜、镉、镍、钴
AI导读
来源: 《中国有色金属学报(英文版)2018年第12期》——杜娟 朱红求 李勇刚 张泰铭 阳春华
synthetic nickel(Ⅱ) and cadmium(Ⅱ) solutions to simulate heavy-metal recovery from aqueous solution. The adsorption efficiency was greater than 98% for both cadmium and nickel ions when the biosorbent... that the reactions are pseudo-second order, and the adsorption isotherm well followed the Langmuir model. The maximum adsorption capacities predicted by the Langmuir model were 75.19 mg/g and 57.77 mg/g for cadmium......
;Effect of extraction time on extraction rate of zinc and cadmium 萃取平衡时间主要取决于萃取反应的速率和萃合物在有机相中的溶解速率,两者的速率越大,达到萃取平衡需要的时间越短.从图1可知,无论是单独萃取体系还是协同萃取体系,锌,镉约在7 min内就可基本达到萃取平衡.为了使萃取反应尽可能达到平衡,萃取时间以10 min为宜... rate of zinc and cadmium 氨性溶液中pH值还与锌氨配位离子的形态密切相关,从而影响锌离子的萃取行为.由图2可看出,随着初始pH值的升高,锌萃取率增大到最大值后出现下降.随着pH值的升高,式(6)平衡向右移动,促使水相中游离的NH3浓度增大,从而使式(7)平衡向左移动,促进了锌氨络合离子的形成.当pH>7.2时,水相中锌的优势物种为Zn(NH3)32+和Zn(NH3)42+,当......
. An optical spectrum analyzer was used to measure the wavelength of the illuminant on the slurry in the activity evaluations of photocatalytic reduction of CO2 over CdS. Both sources of cadmium and sulfur had great impact on the CdS morphology as can be seen in the SEM images. By means of a series of activity evaluations, the microspheric CdS made from cadmium nitrate and thioacetamide showed better......
, Department of Physics, Government Arts College, Karur 639005, India Received 8 May 2016; accepted 21 September 2016 Abstract: The structural and optical characterization of cadmium-doped zinc oxide nanoparticles synthesized by precipitation method was studied. X-ray diffraction study confirmed the substitution of cadmium dopant without disturbing the basic wurtzite structure of zinc oxide. The average......