乙二胺修饰的吸附树脂合成及其对水中苯酚的吸附性能研究

以二乙烯基苯及丙烯酸甲酯悬浮聚合得到弱极性吸附树脂JL-1;利用树脂上残余的双健及氯甲醚进行付-克反应,得到比表面积更大同时含有氯甲基的树脂JL-2.利用树脂上残留的氯甲基和乙二胺反应,制得乙二胺修饰的碱性吸附树脂JL-3,树脂JL-1、JL-2和JL-3树脂内部孔径分布均以中孔为主.以树脂XAD-4为参考对象,研究了树脂对水溶液中苯酚的吸附和脱附性能,研究结果表明,树脂JL-1(321.85 m²/g)、树脂JL-2(397.8 m²/g)和JL-3(313.58 m²/g)对水溶液中苯酚的吸附性能均优于XAD-4(880.0 m²/g).树脂对苯酚的静态吸附动力学更符合准二级吸附动力学方程,树脂JL-1、JL-2和JL-3可以有效吸附水溶液中的苯酚.     

Cu担载量对Cu/ACF吸附-催化氧化苯酚性能的影响

采用等体积浸渍法成功制备了活性炭纤维负载铜(Cu/ACF)催化剂,运用XRD、ICP-AES、XPS、TG-MS以及N_2吸附等方法对Cu/ACF吸附-催化剂进行表征,并探讨了催化剂中Cu担载量对苯酚催化氧化的影响.结果表明:ACF自身没有催化氧化苯酚的活性;Cu担载量分别为1%和3%的Cu/ACF在苯酚吸附饱和后的催化氧化过程中,氧化产物以某种中间化合物形态残留在催化剂表面,随着温度的升高最终将与炭纤维一起烧蚀;Cu担载量为5%的Cu/ACF所吸附的苯酚可被氧化成CO-_2和H_2O,初始氧化温度为315℃,5次循环吸附-催化氧化后苯酚吸附量趋于稳定,表现出良好的稳定性.     

反相高效液相色谱法测定热塑性酚醛树脂中苯酚的含量

建立了一种测定热塑性酚醛树脂中游离苯酚的反相高效液相色谱法 .采用YWGC18(5 0mmi d × 2 5 0mm ,10 μm)色谱柱 ,以甲醇 水 (体积比为 4 5∶5 5 )作流动相 ,流速为 1 0mL/min ,紫外检测波长为 2 16nm ,灵敏度为0 0 4AUFS .在 2 2 0 4～ 4 4 0 8mg/L的范围内 ,苯酚的峰面积Y与其质量浓度X的线性关系良好 ,回归方程为Y =195 0 3X +2 75 6 8(r=0 9998) .苯酚的加标回收试验的平均回收率为 99 5 % ,RSD为 1 4 % ,苯酚的最小检出量为0 8ng .与其他方法相比 ,该方法具有操作简便、线性范围广、检出限低和回收率高等特点 ,有良好的精密度和准确性     

吸光度比值导数光谱法同时测量苯酚和2,4-二氯苯酚

据吸光度比值导数光谱方法的原理,采用了普通分光光度计同时定量分析测定苯酚和2, 4 二氯苯酚。实验表明,苯酚浓度<9mg/L、及2, 4 二氯苯酚浓度<7mg/L时,吸光度比值之导数相应物浓度间呈现线性关系。误差实验显示,苯酚的测量平均相对误差1. 3500(n=12), 2, 4 二氯苯酚的测量平均相对误差2. 0200(n=12)。     

苯甲醚超高交联吸附树脂的合成及吸附性能

用苯甲醚与氯甲醚聚合交联,得到苯甲醚超高交联吸附树脂ZT.红外及比表面测定表明,ZT的比表面积为104.63m2/g.比较ZT,XAD-4对苯胺和苯酚的吸附性能,ZT对苯酚的吸附为放热过程,对苯胺的吸附为吸热过程;苯胺和苯酚的吸附均在200min左右达到吸附平衡.相同条件下,ZT对苯胺、苯酚的吸附量分别是XAD-4的2倍和1.56倍.     

细粒焦渣对废水中酚的吸附研究

利用焦化厂细粒焦渣对苯酚的吸附 ,研究了各种因素 (焦粒大小、pH值和溶液的滤速等 )对吸附的影响 结果表明 ,在 2 5℃ ,滤速为 4 .5mL/min ,pH为 2～ 2 .5,浓度为 30mg/L的苯酚溶液中 ,酚的去除率可达 98% 探讨了细粒焦渣对焦化厂含酚废水处理的可行性 图 4 ,参 10     

玻碳电极吸附循环伏安法测定维生素B_2

目的 :研究维生素B2 在玻碳电极表面吸附的电化学行为及定量分析方法 .方法 :玻碳电极在 8.0mol/LHNO3 介质中 ,于 + 0 .6～ + 2 .0V (vs.SCE)的电位范围内进行循环扫描电活化后 ,维生素B2 在电极表面具有很强的吸附性 ,在底液为 0 .0 5mol/L柠檬酸 + 0 .1mol/LNa2 HPO4 (pH =4 .9)的介质中 ,吸附电位 - 0 .3V ,在 0～ - 0 .7V的范围内 ,以 90mV/s的速度进行循环伏安扫描 .结果 :实验表明VB2 在电极表面具有可逆吸附波的特征 ,VB2 浓度与峰电流在 6.0× 10 - 8～ 7.0× 10 - 6 mol/L之间成线性关系 ,检测限为 1.0× 10 - 8mol/L .结论 :建立了维生素B2 在玻碳电极表面的电化学分析方法 ,将该法运用于实际样品药片中VB2 含量的测定 ,获得满意的结果 .     

Fe 改性活性炭对水中对硝基苯酚的吸附性能研究

通过Fe改性活性炭制得Fe2O3-AC吸附剂,用于对硝基苯酚废水处理,探讨吸附温度、吸附时间、吸附剂用量、初始质量浓度等因素对Fe2O3-AC吸附性能的影响.结果表明:吸附温度为25℃、吸附时间为90min、吸附剂Fe2O3-AC用量为60mg、对硝基苯酚溶液体积及初始质量浓度分别为50mL,100mg/L时,废水中酚去除率可达98.55%.     

多相催化湿式氧化法再生活性炭反应条件

活性炭是水处理中常用的一种有效吸附剂 ,其再生具有重要意义 .采用动态吸附法吸附苯酚溶液的方法 ,模拟活性炭的吸附饱和过程 ;采用浸渍法制备CuO/Al2 O3 催化剂 ;在高压反应釜中对吸附饱和的活性炭进行多相催化湿式氧化 ,使活性炭得以再生 ,并氧化分解被脱附析出的有机物 .在温度 2 10℃、氧分压 0 .6MPa下 ,反应 1h的活性炭再生效率为 4 7.0 % ,出水化学需氧量 (COD)为 36 7.0mg·L-1.结果表明该方法可有效再生活性炭 ,并使出水的COD明显下降 .还考察了反应温度和反应时间等因素对活性炭再生效率和出水COD的影响     

载体对镍基催化剂在苯酚加氢反应中的影响

以Ni(NO3)2·6H2O为活性金属前驱物,采用过量浸渍法制备了Ni/HZSM-5、Ni/HY、Ni/Al_2O_3、Ni/TS-1、Ni/ZrO_2和Ni/CeO_2催化剂,Ni的质量分数由TPR结果计算可得分别为9.2%、9.1%、9.2%、9.5%、9.2%、9.3%.考察了催化剂对苯酚加氢反应的活性和产物选择性的影响.采用X射线衍射、N_2吸附、NH_3程序升温脱附、H_2程序升温脱附等手段对催化剂进行了表征.结果表明,载体的孔结构、酸度的强弱和酸中心数量与苯酚加氢活性具有紧密联系.在反应温度493 K,氢气压力5 MPa下反应180 min,Ni/Al_2O_3具有最高的苯酚转化率,达到85.63%,产物中环己酮选择性最高,达到79.2%;Ni/HZSM-5也有较高的苯酚转化率,而此时产物中环己烷的选择性最高,达到93.9%.     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

An Index mechanism for multi-scale view in spatial databases

There are numerous geometric objects stored in the spatial databases. An importance function in a spatial database is that users can browse the geometric objects as a map efficiently. Thus the spatial database should display the geometric objects users concern about swiftly onto the display window. This process includes two operations:retrieve data from database and then draw them onto screen. Accordingly, to improve the efficiency, we should try to reduce time of both retrieving object and displaying them. The former can be achieved with the aid of spatial index such as R-tree, the latter require to simplify the objects. Simplification means that objects are shown with sufficient but not with unnecessary detail which depend on the scale of browse. So the major problem is how to retrieve data at different detail level efficiently. This paper introduces the implementation of a multi-scale index in the spatial database SISP (Spatial Information Shared Platform) which is generalized from R-tree. The difference between the generalization and the R-tree lies on two facets: One is that every node and geometric object in the generalization is assigned with a importance value which denote the importance of them, and every vertex in the objects are assigned with a importance value,too. The importance value can be use to decide which data should be retrieve from disk in a query. The other difference is that geometric objects in the generalization are divided into one or more sub-blocks, and vertexes are total ordered by their importance value. With the help of the generalized R-tree, one can easily retrieve data at different detail levels.Some experiments are performed on real-life data to evaluate the performance of solutions that separately use normal spatial index and multi-scale spatial index. The results show that the solution using multi-scale index in SISP is satisfying.     

Jane Eyre——A Feminist In The 19th Century

In the 19th century the society was controlled by men, and women were just appendants of them, they had not any rights and freedom. But Jane was an exception, she showed some characteristics of early feminist. Jane showed her characteristics of feminism in three aspects: rebellion, equality, and independence. These characteristics were helpful to her success, and feminism is the only way out for women of that time.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-