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矿物表面
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  mineral surface
    This paper elucidates the control of heavy metal activity by minerals in soils by using the environmental mineralogy theory and method and analyzes the possible positions of occurrence of heavy metals on mineral surface and in interlayer domains and pore throats in more detail.
    利用环境矿物学理论和方法阐明了土壤矿物控制重金属活动状态,具体分析了重金属在矿物表面、层间域和孔道内可能的赋存位置。
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    the absorption of Pb~(2+) on clay mineral surface is a rapid process,which is completed in ten minutes;
    Pb2+在矿物表面的吸附过程是个迅速的过程,矿物对Pb2+的吸附在10min内即可完成;
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    The release kinetic data of water on HCHs was fitted better with apparent first dynamic equation, the release behavior of LMW organic acid on HCHs was fitted with parabola diffuse equation, Elovich equation or double constant equation, indicating that the existence of LMW organic acids caused the release mechanisms of HCHs complex, presuming that it might be related to the dissolution of mineral and the disturbance of the structure of inherent organic material on the mineral surface by LMW organic acid.
    水对HCHs的释放动力学数据用表观一级动力学方程拟合较好,有机酸对HCHs的释放行为更符合抛物线方程、Elovich方程或双常数方程,说明低分子量有机酸的存在使HCHs的释放机理复杂化,推测与有机酸对矿物的溶解、对矿物表面固有有机质结构的干扰有关.
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  “矿物表面”译为未确定词的双语例句
    KINETICS OF H+ RELEASING AS Cu2+ ADSORBED ON VARIABLE CHARGE SOILS AND MINERALS
    可变电荷土壤和矿物表面Cu~(2+) 吸附过程中H~+释放动力学
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    Kinetic Characteristics of Cd~(2+) Desorption in Minerals and Soils under Simulated Acid Rain
    模拟酸雨条件下Cd~(2+)在土壤及其矿物表面的解吸动力学特征
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    Surface chemical behavior of 2,4-dichlorophenol in presence of metal oxides
    2,4-二氯苯酚的矿物表面化学行为研究
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    As compared with the system in the absence of bacteria, the amounts of surface positive charges in soil colloid and minerals all decreased in different degree after addition of bacteria A-l, even as high as 0.76 cmol/kg;
    与无菌体系相比,加入细菌A-1后土壤胶体和矿物表面正电荷量均有不同程度减少,最大可达0.76 cmol/kg;
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    A greater negative effect of Cu on the oxidation of 2,4-DCP was also observed in the suspension of δ-MnO_2 due to its strong adsorption toward Cu,as compared with that of α-MnO_2.
    Cu复合共存可能影响2 ,4 二氯苯酚在矿物表面的键合氧化过程,其中δ- MnO2 对铜吸附能力大于αMnO2 ,Cu复合共存对δMnO2 表面2 ,4 - 二氯苯酚的氧化影响较大.
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  mineral surface
Enzymic oxidation of phenolic precursors on the mineral surface was substantially more rapid than abiotic oxidation and led to synthesis of a highly polymeric fraction with a molecular weight over 75 kDa.
      
Possible types of anion-cation packing of mineral surface were evaluated.
      
Interactions between the dissolved mineral species and other mineral surface were investigated using solution chemistry calculation,ζ-potential measurement, AES analysis and flotation tests.
      
Study on interaction energy between flotation reagent and mineral surface
      
The interaction between a flotation reagent and mineral surface not only depends on the bonding atom, but also depends on the adjacent atom of mineral surface, a flotation reagent and the medium in the system of flotation.
      
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The major active components of natural aquat-'c suspended particulates and sediments are usually clay minerals, hydrous oxide of iron, manganese and aluminum, organic matter and carbonates. Their relative contributions in heavy metal adsorption were studied. With sequential chemical separation procedure, an adsorption model of multi-component adsorbent and the calculation method were proposed in this paper, which have been applied to three samples of sediments from the upper, middle and lower reaches of Xiangjiang...

The major active components of natural aquat-'c suspended particulates and sediments are usually clay minerals, hydrous oxide of iron, manganese and aluminum, organic matter and carbonates. Their relative contributions in heavy metal adsorption were studied. With sequential chemical separation procedure, an adsorption model of multi-component adsorbent and the calculation method were proposed in this paper, which have been applied to three samples of sediments from the upper, middle and lower reaches of Xiangjiang River. The cadmium adsorption experiments at all levels of graded samples were conducted. Some useful results were obtained from adsorption model calculations.

天然水体中悬浮物和沉积物的主要活性组分,通常是粘土矿物,铁、锰、铝水合氧化物,有机物和碳酸盐。本文研究它们在重金属吸附中各自所起的作用。提出了一种逐级化学分离程序和多组分吸附剂的吸附模式及计算方法。应用于湘江上、中、下游三种底质样品,进行了所有分级样品的镉吸附实验。吸附模式计算得到若干有益的结果。 不论颗粒物整体,或是其各种组分,在广泛的重金属浓度范围内,都得到Langmuir型吸附等温式,并由它们共同组成Langmuir型吸附模式。电子显微镜研究表明,粘土矿物表面只有局部被其他组分复盖。模式计算表明,在湘江沉积物样品总吸附量中,粘土矿物的吸附、贡献仍占主要地位(60—70%)。金属水合氧化物(15—25%)和有机物(11—22%)大致在同一水平而前者略高,碳酸盐的作用(0.1—5%)则较微小。各种组分在吸附中所起的作用评价应该同它们的相对含量联系起来,综合加以考虑。

Kinetic study of nickel sulphide concentrate and natural pentlandite of Jin Chuan

用沸腾床研究了金川硫化镍精矿和天然纯镍黄铁矿焙烧动力学。利用H_2O_2溶液吸收SO_2、测其电导率、自动记录焙烧曲线。求得两种矿物的表面活化能分别为174.4和109.6kJ/mol。焙砂经电镜检验表明:进行部分氧化焙烧时,两种矿的镍黄铁矿粒内都发生铁向外、镍向内的金属离子逆向迁移。铁的硫化物优先氧化,形成铁的氧化物壳层,而镍则富集在矿粒内部,与硫共存,不氧化。

This paper deals with the flotation behavior of pyrites from three different types of mineral deposits in the presence of different modifiers and an investigation of the effect of the semi-conductivity on the flotability of pyrite. From the results of flotation experiments with the Hallimond tube and nitrogen- ated techniques, it is shown that under the conditions of suitable concentration of butyl xanthate and with NaOH, CaO, FeSO_4, FeCl_3, Na_2SO_3, and CuSO_4 as modi- fiers, the flotabilities of pyrites...

This paper deals with the flotation behavior of pyrites from three different types of mineral deposits in the presence of different modifiers and an investigation of the effect of the semi-conductivity on the flotability of pyrite. From the results of flotation experiments with the Hallimond tube and nitrogen- ated techniques, it is shown that under the conditions of suitable concentration of butyl xanthate and with NaOH, CaO, FeSO_4, FeCl_3, Na_2SO_3, and CuSO_4 as modi- fiers, the flotabilities of pyrites are closely related to their semi-conductivities, i. e. under the depression conditions, the mineral particles with p-type semi-conductivity and greater absolute value of thermoelectric power are more difficult to depress than those with n-type conductivity but under the activation conditions, the mineral par- ticles with n-type semi-conductivity and less absolute value of thermoelectric power have the best flotabilities. The above-mentioned experiments and the experimental results were issued in J. of CSIMM, №_. 4, 1982. In this work, a simple working model is established, in terms of which differences in the flotation properties may be well illustrated by the influence of their semi-conductivities on the kinetics of the electrochemical processes of the formation of dixanthogen on the pyite surface or on the anionic xanthate adsorption.

作者对产自三个不同类型矿床的黄铁矿在某些调整剂作用条件下的浮选行为作试验;并对黄铁矿的半导体性质与可浮性的关系进行了探讨。充氮气的单泡浮选试验结果表明,在适当的丁黄药浓度下及在NaOH,CaO,FeSO_4,Na_2SO_3和CuSO_4等为调整剂的条件下,黄铁矿的可浮性与半导体性质有密切关系。在抑制条件下,温差电动势率绝对值较大的p型黄铁矿比n型黄铁矿较难抑制。在活化条件下,温差电动势率绝对值较小的n型黄铁矿可浮性最好。上述试验及其结果已在中南矿冶学院学报1982年第4期发表。在本文中,作者提出了一个半导性影响矿物表面形成双黄药的电化学过程动力学的模型,利用这一模型,各种黄铁矿可浮性的差异可得到较好的解释。

 
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