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锌铅     
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  zinc and lead
     The theoretical calculation of Zn-Pb and Zn-Cd systems show good separation of Zinc and lead, the possibility of separation of Zinc and Cadmium when t=650 C, (Zn%)liquid>98% and the separation coefficient βPb=2.274×10~-3, βCd=26.752. The temperature, pressure,depth of charge and time are investigated.
     由理论计算得到650℃时,在Zn—Ph及Zn—Cd系富锌端,分离系数βPb=2.274x10~-3,βCd=26.752,说明锌铅分离效果很好,锌镉仍有可能分离。
短句来源
     Possibility of enzyme activities as indicators of assessing soil compound contamination with cadmium,zinc and lead
     土壤酶活性评价镉锌铅复合污染的可行性研究
短句来源
     Metal-accumulation of Ruditapes philippinarum in high zinc and lead experimental waters
     菲律宾蛤仔在高浓度锌铅水体中的金属积累
短句来源
     Researh on the Testing Condition of zinc and lead in Copper Alloy
     铜合金中锌铅测定条件的探讨
短句来源
     Successive Determinations of Copper,Zinc and Lead with A.C.Oscillopolarographic Titrimetry
     交流示波极谱滴定法联合测定铜锌铅
短句来源
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  zn-pb
     Studies on Theoretical Principle and Application of Separation of Zn-Pb
     锌铅分离的理论及应用研究
短句来源
     Semi-industrial Study on the Separation of Zn-Pb in the Zn-Pb-containing Dusts Coming from the Steel Plant
     钢铁厂含锌铅粉尘中锌铅分离的半工业试验
短句来源
     The theoretical calculation of Zn-Pb and Zn-Cd systems show good separation of Zinc and lead, the possibility of separation of Zinc and Cadmium when t=650 C, (Zn%)liquid>98% and the separation coefficient βPb=2.274×10~-3, βCd=26.752. The temperature, pressure,depth of charge and time are investigated.
     由理论计算得到650℃时,在Zn—Ph及Zn—Cd系富锌端,分离系数βPb=2.274x10~-3,βCd=26.752,说明锌铅分离效果很好,锌镉仍有可能分离。
短句来源
     NEW PROCESS ON UTILIZATION OF DUSTS BEARING Zn-Pb FROM METALLURGICAL PLANT
     冶金含锌铅炉尘回收处理新方法
短句来源
     Study On the Separation of Zn-Pb in the Zn-Pb-containing Dusts Coming From the Steel Plant
     钢铁厂含锌铅粉尘中锌铅分离理论及实践
短句来源
  zn pb
     The inmetco process is an important method,with which the in plant Zn Pb bearing dust can be treated.
     Inmetco工艺是处理含锌铅钢铁厂粉尘的重要方法。
短句来源
     DETERMINATION OF CERUM Cu, Zn, Pb AND Cd IN 45 PATIENTS WITH COR PULMONALE
     45例肺心病患者血清铜锌铅镉的测定
短句来源
     a new theory and a new method of separation of Zn Pb from the dusts are davanced;
     提出含锌铅粉尘锌铅分离的新概念和新方法 ;
短句来源
     EVAPORATION KINETICS OF LEAD IN CARBON CONTAINING PELLETS FROM Zn Pb BEARING DUSTS
     含锌铅粉尘配碳球团中铅挥发动力学
短句来源
     The Comparison Between Two Digestion-AAS Methods of Detect Cu,Zn,Pb,Cd,Cr in Fish and Shrimp
     原子吸收法测定鱼虾铜锌铅镉铬两种消解方法的比较
短句来源
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  zinc lead
     DETERMINATION OF COPPER, ZINC, LEAD AND CADMIUM IN SOIL BY ATOMIC ABSORPTION SPECTROMETRY
     原子吸收法测定土壤中铜锌铅
短句来源
     95% cadmium are approximately recycles from the zinc production process, therefore the cadmium is the zinc lead production sideline product.
     约95%的镉是从锌生产过程中回收的,所以镉是锌铅生产的副产品。
短句来源
     Study on the Relations between Height,Weight and Zinc, Lead in Hair or Blood of Children
     幼儿身高、体重和头发、血液锌铅含量关系的研究
短句来源
     Determination of Trace Copper,Zinc,Lead and Gadmium in Seawater with Extraction-Axti-Extraction Seperation Atomic Absorption Spectrum Method
     萃取——反萃取分离原子吸收光谱法测定海水痕量的铜锌铅
短句来源
     EFFECTS OF ZINC LEAD AND CADMIUM CONTAMINATION ON NITRATE CONTENTS IN PAKCHOI
     土壤锌铅镉污染对小白菜硝酸盐含量的影响
短句来源
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      zinc and lead
    Although the reaction of α,α-dibromo-α-fluorotoluene with zinc and lead involves formation of fluoro(phenyl)carbene, this procedure is not suitable for the synthesis of 2-fluoro-2-phenylaziridines.
          
    The Use of the Mortality Rate of Marine Fish Prelarvae for the Estimation of Zinc and Lead Toxicity
          
    According to the results of model experiments with artificial contamination of soil, the flux of zinc and lead from the starting point (from a medium loamy leached chernozem) to the final point (wheat grains) sharply decreases.
          
    The adsorption of zinc and lead on hair was dependent on the acidity of the hair and/or the medium in which the hair sample was immersed, suggesting that hair is an ion exchanger.
          
    Age- and sex-related differences in zinc and lead levels in human hair
          
    更多          
      zn-pb
    The thermodynamic simulations were conducted for the system H-O-K-Na-Ca-Mg-Al-Si-Fe-C-Cl-S-Zn-Pb-Cu, which is described by 54 minerals of constant and variable composition and 78 aqueous species.
          
    Hydrodynamic and geochemical conditions of the formation of stratiform Zn-Pb ore mineralization by chloride solutions
          
    Gas evolution of electrodeposited Zn-Pb-In-Bi alloy powder was less than that of atomized mercury-free alloy powder.
          
    The hydrothermal activity which began in this steam explosion center is responsible for the formation of the Kuroko-type Cu-Zn-Pb-mineral deposits.
          
    The various Zn-Pb-Ba-Fe occurrences appear to be strictly bound to continental dolomitic sediments (black ferroan dolomites), which outline the triassic erosional surfaces.
          
    更多          
      zn pb
    Cigaret smoking, despite its relatively low prevalence (19.5%), was associated with lower Zn and higher Cd and Pb concentrations and in lower Zn/Cd and Zn/Pb molar concentration ratios.
          
    Smoking frequency appeared to show negative dose-response effects on maternal and neonatal Zn concentrations, Zn/Pb molar concentration ratios, and birth weight.
          
    Un grand nombre de minéralisations de Zn(Pb) dans l'Ordovicien présentent un "faciès" de minerai identique mais sont encaissées dans des formations de lithologie variable.
          
    Arrens Zn (Pb), Ba Devonian deposit, Pyrénées, France: an exhalative-sedimentary-type deposit similar to Meggen
          
    These were an agricultural soil located nearby a Zn/Pb smelter and two soils from a steel metallurgical (siderurgy) waste land.
          
    更多          
      zinc lead
    The reported experimental work on the systems PbOx-CaO and PbOx-CaO-SiO2 in air is part of a wider research program that combines experimental and thermodynamic computer modeling techniques to characterize zinc/lead industrial slags.
          
    This research is part of a wider program to characterize zinc/lead industrial slags and sinters in the PbO-ZnO-SiO2-CaO-FeO-Fe2O3 system.
          


    In order to improve the analytical quality of the background values in soils and crops, an intercomparison test among 23 laboratories has been organized. Precision and accuracy from results of this test showed that it pays for the effort in laboratories in the determination of Cu, Zn, Cd, Pb and Ni in soils. Content of the above elements in six soil samples was determined. It is suggested that analytical quality control technique should be used in soil background survey.

    为了提高农业土壤、作物背景调查分析的质量,农业部环境监测研究所分别组织了土壤参考样品的比较测试。本工作是1980—1981年间对23个背景值调查参加单位的铜、锌、铅、镉和镍测定的准确度和精密度作了观察,估计了参考土壤的含量。结果表明准确度问题更应引起注意。建议在土壤背景值调查中试用分析质量控制。

    Four heavy metals--copper, zinc, lead and cadmium were found in the dischargedwater from the lead and zinc smeltry. These four heavy metals remain a rather highcontent in the water all the year around. Most of them was deposited in the silt of theriverbed, it is considered to be the potential harmfulness to fish. These heavy metals gradually accumulate in planktons and then transfer to the fish body. The coeffcientof acamulation is Zn = 1. 6×10~4, Cu =1. 9×10~3, respectively. The content of lead andcadmium in...

    Four heavy metals--copper, zinc, lead and cadmium were found in the dischargedwater from the lead and zinc smeltry. These four heavy metals remain a rather highcontent in the water all the year around. Most of them was deposited in the silt of theriverbed, it is considered to be the potential harmfulness to fish. These heavy metals gradually accumulate in planktons and then transfer to the fish body. The coeffcientof acamulation is Zn = 1. 6×10~4, Cu =1. 9×10~3, respectively. The content of lead andcadmium in the fish body is not less than 10~4.The ratio of the content of the four heavy metals in the body of the deformedfish is Zn: Cu: Pb: Cd = 59: 10: 3: 1. The content of cadmium in the deformed fish waseighteen times higher than that in the controlled group. This shows that the highconcentration of cadmium may be the causal factor of the deformation of fish.The experiment has proved that the pernicious heavy metals in the waste waterdischarged from the smeltery have toxic effects on fish. When the water contains1.4% in volume, the TLM of the experimental fish is 48. When the content of zincis high above 1 .5mg/l, fish will die in acute poisoning and the content of zinc andcadmium reach to 0. 25mg/l and 0. 0125mg/l, respectively, the symptoms of ataxia inswimming, paralysis and deformation will appear. Zinc has a quick toxic effect,always cause high mortality. Cadmium has a great effect on deformation. The mixedsolution of Zn and Cd has a combined effect on fish.

    本文报道了铅锌冶炼厂废水中所含有的铜、锌、铅、镉污染物对鱼类的毒性调查。初步查明了污染物在不同季节、气温条件下引起鱼类死亡、畸变的影响。通过调查分析发现,污染区鱼体重金属含量显著高于对照区;畸变鱼高于未畸变鱼。畸变鱼体内四种重金属含量的顺序是锌>铜>铅>镉,与水中含量顺序一致。畸变鱼体内镉的含量比对照区高18倍,从而认为镉与畸变可能有密切关系。鱼体的不同部位四种重金属含量有明显差异,值得进一步探讨。

    Deposition potentials of neodymium and yttrium ions on liquid Sb, Bi, Al, Ga, Sn, Zn, Pb and In cathodes and Solid Mo cathode in equimolar KCl·NaCl have been studied using technique of potential sweep voltammetry. The deposition potential differences between liquid cathodes and Mo cathode △ω have been calculated. These differences are not only due to decreased activity of neodynium and yttrium in liquid cathodes, shifting deposition potentials to oppositive direction but also the depolarization effect caused...

    Deposition potentials of neodymium and yttrium ions on liquid Sb, Bi, Al, Ga, Sn, Zn, Pb and In cathodes and Solid Mo cathode in equimolar KCl·NaCl have been studied using technique of potential sweep voltammetry. The deposition potential differences between liquid cathodes and Mo cathode △ω have been calculated. These differences are not only due to decreased activity of neodynium and yttrium in liquid cathodes, shifting deposition potentials to oppositive direction but also the depolarization effect caused by alloying neodymium and yttrium with liquid cathode. The greater electronegativity differences between rare earth metals and liquid cathode materials, the greater is △ω. Effects of NdCl_3 and YCl_3 concentrations and temperature of the melt on deposition potentials of neodymium and yttrium ions and △ω have been studied as well. Corresponding equations are given.

    用线性扫描伏-安法研究了等摩尔KCl·NaCl熔体中钕和钇离子在锑、铋、铝、镓、锡、锌、铅、钠八种液体阴极和固体钼阴极上析出电位,求出了析出电位差△ψ。产生△ψ的原因是稀土在液体阴极中的活度比在固体阴极上低,使析出电位向正移,同时也由于稀土与液体阴极合金化产生去极化作用的结果。稀土金属和液体阴极材料的电负性差越大,△ψ也越大。还研究了稀土氯化物浓度和熔体温度列稀土离子析出电位和△ψ的影响,给出了相应的关系式。

     
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