查询词典 chemical adsorption

Aim To further study the chemical constituents from the marcroporous adsorption resin 50% EtOH eluent of Drynaria fortunei.

目的 研究骨碎补大孔吸附树脂柱色谱以体积分数50%乙醇洗脱部分的化学成分。

Both of the analysis and the measurements showed that the particle zeta potential is close related to chemical properties of ionizable functional groups on particle surface, pH and specific adsorption of anions and cations.

结果表明，颗粒表面ζ电位与颗粒表面离子化官能团的化学性质、天然水pH值和专属吸附的阴阳离子Ca~(2+和PO_4~(3-)有密切关系。

The results of the present research are as follows, The correlation between physico-chemical properties of organic compounds and their competitive power was studied, and it was indicated that organic compounds preferable to form H-bonding with organic matter of sorbents have stronger competitive power; Sorption behaviors of ionizable organic compounds in different species and their competitive power were examined, and the results showed that phenols and carbonxylic acids with benzyl circle have much stronger competitive power in molecular species than in ionized species, because negative charges of anionic forms can depressed their adsorption on the surface of the sediment; in contrast, organic bases such as aniline and p-chloroaniline show weaker competitive power in molecular species than in ionized species, and this is because both species of the organic bases could adsorb strongly onto the sediment; there is a correlation between competitive power of organic pollutants in multi-solute systems and their sorption isotherm nonlinearity in single-solute systems, and organic compounds whose sorption isotherms is linear in single-solute systems hardly have competitive power in multi-solute systems; Competitive sorption effects in more than two-solutes systems was studied, and it was exhibited that mixture of two cosolutes each of which could suppress sorption of nominal solute onto the sediment had synergistically competitive sorption effect on the nominal solute; A method about incorporating sorption/desorption of organic pollutants into river water quality model was developed, and discussion about degree of sorption/desorption effect on model prediction for different organic compounds was made, which will provide theoretical basis and practical processes for setting up more accurate water quality model.

论文主要取得了以下研究成果。(1)有机化合物的吸附竞争能力与其物化性质具有相关性，易与沉积物有机质形成氢键的化合物其竞争能力也比较强；(2)可离子化有机化合物的吸附竞争能力与其存在形态有关。酚类、含苯环的羧酸类化合物，其离子态的吸附竞争能力远小于分子态，其机理为有机酸阴离子所带的负电荷抑制了表面吸附能力，主要发生分配作用；而苯胺类化合物，其离子态和分子态都表现出显著的竞争能力，而且离子态的竞争能力略强于分子态，原因在于有机碱阳离子所带的正电荷促进了其表面吸附能力；有机化合物竞争能力的强弱与其单组分吸附等温线的非线性程度具有一定的相关性，吸附等温线近似为线性的化合物没有或只具有微弱的竞争能力；(3)对目标有机化合物的吸附具有竞争效应的有机化合物混合后，将对目标有机化合物的吸附产生协同竞争效应；(4)以京杭运河为例，率先提出了将有机污染物的吸附／脱附作用及水文水力参数耦合到水质模型中的方法，并讨论了吸附／脱附作用对不同有机污染物预测模型的影响，为建立更准确的水质模型及进行更客观的风险和生态评估提供了参考依据。

Surface complex supports VSiO, which have good engineering character, and supported Pd/VSiO and Cu/VsiO catalysts have been prepared by surface chemical reaction modification and isovolume impregnation method, respectively. BET, TPR, chemisorption-IR chemisorption-TPD and microreaction techniques have been used to study the adsorption activation and partial oxidation reactivity of CO〓 and C〓H〓 on the Pd/VSiO and Cu/VSiO catalysts.

以表面化学反应改性法制备了工程性质优良的VSiO表面复合物载体，并以等体积浸渍法制备了负载型的Pd/VSiO和Cu/VSiO催化剂；采用BET、TPR、化学吸附—IR、化学吸附—TPD和微反技术研究了Pd/VSiO和Cu/VSiO催化剂对CO〓和乙烷的吸附活化和部分氧化反应性能。

The adsorption of nitrogen oxides on ion exchanged mordenite was investigated by quantum chemical calculation based on density functional theory methods.

选择2T簇模型代表丝光沸石结构，采用密度泛函理论研究氮氧化物在离子交换丝光沸石中的吸附。

In the sixth chapter, according to our nations situations, a probing study on the development and application of natural mordenite was carried out at the aim to develop a new adsorbent carrier and reduce the cost of adsorbent preparation. The characters of natural mordenite were chemically changed by an acid. The effects of the acid solution concentration, temperature, mordenite size and treatment times on the physico-chemical characters of mordenite were undertaken. The adsorption equilibrium of CO on the character-changed natural mordenite was measured.

在第六章中，结合我国的实际情况，对天然丝光沸石的开发利用进行了探索性的研究，期望开发一种新的吸附剂载体，以降低吸附剂的制备成本，为此，对天然丝光沸石进行了酸化学改性，研究了酸溶液和浓度、温度和沸石粒度以及处理次数对丝光沸石物理化学性质的影响，测定了CO在改性丝光沸石上的吸附平衡。

It was found that photochemical deposition of Hg occurred at the layer of TiO2 covering the surface of titanium electrode under UV irradiation, the adsorption of sulfadiazine on the photochemically deposited Hg was stronger than that on the electrochemically deposited Hg, and a method for the determination of sulfadiazine was proposed by the adsorptive stripping voltammetry based on photo-chemical deposition of Hg on Ti electrode.

该研究发现采用紫外光照射钛电极表面氧化钛层能够光催化还原Hg(上标致2+)生成Hg微粒，在Ti基电极上光化学沉积Hg比电化学沉积Hg对磺胺嘧啶具有更强的吸附作用，基于光化学沉积Hg/Ti电极建立了一种吸附溶出伏安法测定磺胺嘧啶的方法。

The graft polymerization of acrylonitrile on Crosslinked polyvinyl alcohol microspheres CPVA microspheres was performed by using cerium ammonium sulfate as initiator, and grafted microspheres CPVA-g-PAN were prepared. Subsequently, the grafted PAN was converted into poly via amidoximation reaction with hydroxylamine hydrochloride as reagent, resulting in the functional microspheres CPVA-g-PAO. The chemical structure and physicochemistry characters were adequately characterized with infrared spectrum, scanning electron microscope and determining Zeta potential. The effects of main factors on the amidoximation transform reaction of the grafted PAN were researched with emphasis, and the adsorption property of the functional microspheres CPVA-g-PAO for some biomolecules was examined preliminarily with uric acid as a model biomolecule.

以硫酸铈铵为引发剂，实施了丙烯腈在交联聚乙烯醇微球表面的接枝聚合，制备了接枝微球CPVA-g-PAN，然后以盐酸羟胺为试剂，通过偕胺肟化转变，将接枝的PAN转变为聚偕胺肟，制得了接枝有聚偕胺肟的功能微球CPVA-g-PAO，采用红外光谱法、扫描电子显微镜及Zeta电位测定等法，对功能微球CPVA-g-PAO的化学结构及物理化学特性进行了表征，重点考察了各主要因素对接枝PAN的偕胺肟化转变反应的影响，也以脲酸为模型分子，初探了功能微球CPVA-g-PAO对生物分子的吸附性能。

Olfactory environment of urban vegetations is a chemical factor that concerns well-beings deeply. Volatiles from such vegetations are sampled by Tenax-GR adsorption tubes portably within a closed circulation system of dynamic head-space collector, which was proposed and improved by our research team.

绿色环境除了人们在传统上重视的景观视觉因素外，由植物挥发物通过人类嗅觉感受体现出的绿色嗅觉环境质量状况也是林业人类工效学研究中与人体健康关系密切的化学环境因素。

It was found that the bioaccumulation of Ct on Spirulina platensis involved two steps:rapid adsorption and slow absorption. Chromic compounds with weaker chemical bond had higher bioaccumulation efficiency. Under the same algal cell concentration, Crbioaceumulation rosed up with Crconcentration. On the other hand, with Cr concentration not changed, the total bioaccumulation of Cr on Spirulina platensis increased with algal cell concentration, but the Cr bioaceumu lation on unit algae reduced.

发现螺旋藻对Cr的生物富集主要经历了快速的吸附和缓慢的吸收两个步骤；化学键较弱的Cr化合物具有较高的富集效率；藻细胞浓度一定时，随着Cr浓度的增加，单位重量螺旋藻对Cr的富集量不断增加，最后趋于饱和；当Cr浓度一定时，随着藻细胞浓度的增加，螺旋藻对Cr的总富集量逐渐增加而单位重量藻体的富集量减少。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。