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   专性吸附 在 农业基础科学 分类中 的翻译结果: 查询用时:0.481秒
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专性吸附
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  specific adsorption
    of H2PO4- is high enough. However, the competation influence of SO4(2-) on H2PO4- adsorption is very small. This result demonstrats that adsorption power of H2PO4- is great, which belongs to the high-strength specific adsorption type and is not easy to be exchanged by other anions;
    SO4(2-)对H2PO4-吸附量的影响很小.说明土壤对H2PO4-的吸持力较强,为高强度专性吸附,不易于被其它阴离子解吸;
短句来源
    and that specific adsorption characteristic values ( n ), reflecting proportions of specific adsorption and electrostatic adsorption, showed a trend of NO - 3> Cl - > SO 2- 4> oxalic acid> citric acid.
    专性吸附特征值 (n值 )反映了吸附过程专性吸附与电性吸附比例的大小 ,其值大小表现为 :NO- 3>Cl- >SO2 - 4>草酸根 >柠檬酸根的趋势
短句来源
    STUDIES ON ELECTROCHEMICAL PROPERTIES OF SOILS Ⅹ. CHARGE CHARACTERISTICS OF RED SOILS AS AFFECTED BY SURFACE PROPERTIES OF THE SOIL AND SPECIFIC ADSORPTION OF IONS
    土壤电化学性质的研究——Ⅹ.红壤胶体的表面性状和离子专性吸附对表面电荷性质的影响
短句来源
    STUDY ON THE SPECIFIC ADSORPTION OF COPPER ION BY SOILS AND ITS CHARACTERISTICS
    土壤对铜离子的专性吸附及其特征的研究
短句来源
    SPECIFIC ADSORPTION OF HEAVY METAL IONS ON LATOSOL AND ITS MINERALS
    砖红壤及其矿物表面对重金属离子的专性吸附研究
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  “专性吸附”译为未确定词的双语例句
    2. For the tested acid soils, available Mn was divided into four chemical fractions, which were readily soluble Mn, weakly absorbed Mn, specifically absorbed Mn and oxide Mn and readily soluble Mn were main fractions of available Mn, and the relative proportion of the two fractions in total available Mn accounted for 86.4% and 7.7% respectively.
    2.对于酸性土壤来说,有效锰分为易溶态锰、弱吸附态锰、专性吸附态锰和氧化锰四种化学形态,其中氧化锰和易溶态锰是其有效锰的主要存在形态,二者分别占有效锰总量的86.4%和7.7%;
短句来源
    The effect of K+ on NH4-Q/I curve or NH4+ on K-Q/I curve was essentially a comprehensive balance of the decrease in (Ca+Mg)ex,the change in the ratio of NH4+/K+ specifically sorbed on the exchanger and the complementary ion effect.
    K~+对NH_4~-Q/I或NH_4~+对K-Q/I的影响,受(Ca+Mg)_(ex)降低、专性吸附NH_4~+-K~+比改变和陪补离子等综合作用.
短句来源
    The amount of desorption of Cd increased with increasing pH and amount of Cd adsorption. However, the proportion of Cd desorption to adsorption decreased with pH. At pH 3-7, the ratio of desorption to adsorption of Cd in yellow brown earth was 42%~95% with average 75%, which indicated that Cd was mainly nonspecifically adsorbed by yellow brown earth and the availability of Cd adsorbed was high.
    解吸Cd2+的数量随pH升高和吸附Cd2+的数量增加而增加,但解吸Cd2+占吸附Cd2+的比例随pH升高而降低,在pH3 7下,黄棕壤解吸Cd2+的比例为42%~95%,平均为75%,说明黄棕壤Cd2+以非专性吸附为主,吸附Cd2+的有效性高。
短句来源
    The affinity characteristics (K) of four soils in Na+system decreased i n an order: latersol>red latersol>yellow brown earth and dark brown earth. Coexi sting Na+had no significant effect on the adsorption of Cu2+by soils, while Ca2+or Zn2+caused the adsorption of Cu2+decreasing significantly.
    Cu2+的吸附结合能(K)在Na+体系下为砖红壤>赤红壤>黄棕壤>暗棕壤,说明4种土壤对Cu2+吸附的亲和力依次减弱,但Ca2+共存时使土壤对Cu2+的吸附结合能明显增大,说明Ca2+可使土壤对Cu2+专性吸附增强;
短句来源
    (3)Pb~(2+) and Cu~(2+) adsorption on the surface of the three soils existed in both static and specific patterns. The specific pattern accounted for 56%,67% and 50% respectively,in the case of Pb~(2+).
    (3)石灰性紫色土、中性紫色土和酸性紫色土表面对Pb2+和Cu2+的吸附以静电和专性方式共存,其中对Pb2+的专性吸附比例分别约为56%、67%和50%;
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  specific adsorption
The specific adsorption potential of SDS is found to be -(4.6 ± 0.1)?, where ? is the product of Boltzmann's constant and absolute temperature.
      
The specific adsorption potential is independent of the background electrolyte concentration, remains constant within the determination error of the parameters, and substantially contributes to the formation of EDL of micelles.
      
In the absence of TMA, ellipsoidal particles were obtained due to the anisotropic growth caused by the specific adsorption of TEOA onto the crystal planes parallel to the c-axis of a titania particle.
      
This is probably due to the specific adsorption of SO2-3 ions on Ag2S centers.
      
The distribution coefficients and the maximum specific adsorption of this compound on the test sorbents were calculated.
      
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This paper presents the properties of oxide surfaces in soil colloids, including zero point of charge (ZPC), titration curves, amount of hydroxyl(OH) released, and adsorption of NH_4~+ and Cl~- under various pH. The results showed that as compared with the properties of siloxane surface in montmorillonite, the oxide surfaces supplid larger amount of variable charge, the sesquioxide in soils increased the ZPC, but the permanent negative charge and organic matter decreased the ZPC of soits. As clay acids, the...

This paper presents the properties of oxide surfaces in soil colloids, including zero point of charge (ZPC), titration curves, amount of hydroxyl(OH) released, and adsorption of NH_4~+ and Cl~- under various pH. The results showed that as compared with the properties of siloxane surface in montmorillonite, the oxide surfaces supplid larger amount of variable charge, the sesquioxide in soils increased the ZPC, but the permanent negative charge and organic matter decreased the ZPC of soits. As clay acids, the proton on oxide surfaces dissociated gradually, so the titration curves showed no inflexions. The density of hydroxy and hydrous group on oxide surfaces which responded to specific adsorption of ion were higher. So far as the chemical formula is concerned, the oxide surfaces in soils are commonly Si-OH, Al-OH and Fe-OH. They can coexist in one kind of soil. The Si-OH sub-surfaces of oxide with low ZPC usually supply negative variable charge, the Al-OH and Fe-OH subsurfaces with high ZPC supply positive variable charge.

我们以蒙脱石为对照,测定了以水合氧化物型表面为主的试样四个方面的表面性质:电荷零点(ZPC)、滴定曲线、羟基释放量及不同pH条件下对NH_4~+和Cl~-的吸附。结果表明,在pH 4—9范围内,氧化物型表面提供可变正电荷1—8 meq/100g,提供可变负电荷3—15meq/100g;三二氧化物使土壤的ZPC升高,而永久负电荷和有机质使土壤的ZPC降低。作为粘土酸,氧化物表面的酸性较弱,其表面质子逐步解离,使滴定曲线不出现突跃。氧化物表面的羟基和水合基密度很高,增加了土壤对离子的专性吸附能力。土壤中常见的氧化物型表面主要来自Fe,Al氧化物及非品质矿物,就它们的化学式而言,主要有Si—OH、Fe—OH及Al—OH,它们可存在于同一土壤中,在土壤常见的pH范围内,具有低ZPC的Si—OH亚表面提供可变负电荷,具有高ZPC的Fe—OH和Al—OH亚表面提供可变正电荷。

Effect of organic matter, free iron oxide and amorphous Si and Al on the Cd adsorption and desorption of colloids of lime concretion black soil (IBC), yellow brown earth (YBC), red earth (RC) and latosol (LC), which are the typical soils in South and Southeast China, was studied with selective dissolution method. Results showed the decrease of Cd adsorption by colloids of the soils after removal of OM might be due to the decrease of exchangeable adsorption by the soil colloids. Removal of free Fe_2O_3 resulted...

Effect of organic matter, free iron oxide and amorphous Si and Al on the Cd adsorption and desorption of colloids of lime concretion black soil (IBC), yellow brown earth (YBC), red earth (RC) and latosol (LC), which are the typical soils in South and Southeast China, was studied with selective dissolution method. Results showed the decrease of Cd adsorption by colloids of the soils after removal of OM might be due to the decrease of exchangeable adsorption by the soil colloids. Removal of free Fe_2O_3 resulted in significant decrease of Cd adsorption by the colloids of YBC, RC and LC, which indicates the significance of specific adsorption of free iron oxide in these soils. Cd adsorption decreased with increasing of amorphous Al content in soil colloids, which might be due to the high energy exchange sites being occupied by Al ions. The Cd desorption percentage by the soil colloids after different treatments was in the order: that removing amorphous Si, Al>that removing free Fe_2O_3>that removing OM>the original soil colloids, however, the order differed slightly for different soils under different pH.

采用选择溶解法研究了有机质、游离铁、无定型硅、铝等土壤组份对青黑土、黄棕壤、红壤和砖红壤胶体吸附和解吸Cd的影响。结果表明,去除有机质后胶体吸附Cd减少,这可能是由于交换吸附的减少所致;游离铁的去除使得黄棕壤、红壤和砖红壤的吸附量显著减少,显示了在这些土壤中游离氧化铁专性吸附的重要性;随着无定形铝含量的上升,吸附量下降,这是因为铝离子占据了高能量的吸附位。经不同处理后的土壤胶体,其Cd的解吸顺序(解吸%)大致为:去无定型硅、铝者>去游离铁者>去有机质者>原胶体,但在不同土壤和不同pH条件下该顺序略有差别。研究结果为控制和改造土壤Cd污染提供了理论依据。

The present paper deals with the effect of the components of soils on the specific adsotption of copper ion and its characteristics. Latosol, red earth and paddy soil (neutral) were used in this paper. The specific adsorption of Cu~(2+) ion was determined in the presence of 0.5 M NaCl as supporting electrolyte, and the initial pH of solution was 4.00.

供试土壤专性吸附铜的等温线均符合Langmuir方程。红壤吸附量最低,砖红腹与黄泥土最大吸附量相近,但在铜浓度低时砖红壤吸铜量远低于黄泥土,而在高浓度则反之。土壤专性吸附铜是在溶液中Na~+浓度比Cu~(2+)高8.3—100倍条件下,Na~+离子仍不足以与之竞争的那些专性吸附点所吸持的铜。按其解吸条件区分为松结合铜(可为N NH_4Cl解吸)和紧结合铜(仅能为0.1 N HCl解吸)两种。紧结合铜受平衡溶液铜浓度影响很小,所占据的吸附点对Cu~(2+)有较强亲和力。松结合铜则随平衡铜溶液浓度增大而增加,符合Langmuir方程。对于砖红壤和黄泥土,在铜浓度低时紧结合铜>松结合铜;浓度高时则反之。红壤专性吸附铜始终以松结合铜为主。三种土壤比较,紧结合铜是砖红壤>黄泥土>红壤;松结合铜则是黄泥土>砖红壤>红壤。造成这些差别的原因可能与土壤性质、氧化物、有机质和粘土矿物组成等不同有关。用平衡法研究三种土壤专性吸附铜在不同浓度NH_4Cl和HCl溶液中的解吸表明,可进一步区分为三或四种不同的结合状况。红壤对铜吸附容量最小,且最易解吸。

 
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