改性花生壳粉对Mn2+的吸附

以花生壳为原料,用甲醛和环氧氯丙烷为改性剂制备了甲醛和环氧氯丙烷改性花生壳粉吸附剂,并考察了其吸附Mn^2＋的影响因素即吸附溶液的pH、金属离子初始质量浓度、吸附时间等.结果表明：在10 g花生壳粉中分别加入1.25 mol/L的NaOH溶液80 mL和环氧氯丙烷30 mL,置于水浴锅中于40℃搅拌反应1 h,水洗干燥后得到环氧氯丙烷改性花生壳粉,用此改性的花生壳粉吸附Mn2＋的最佳条件为：pH值5.0、吸附30 min,用0.2 g环氧氯丙烷改性花生壳粉处理10.0 mg/L的Mn^2＋溶液25 mL吸附率可达100%,最大吸附量不低于29 mg/g;未改性花生壳粉和甲醛改性花生壳粉对Mn^2＋的吸附率仅为53%和43%,最大吸附量分别为5.96 mg/g和1.32 mg/g.     

改性花生壳粉对Mn^2＋的吸附

以花生壳为原料,用甲醛和环氧氯丙烷为改性剂制备了甲醛和环氧氯丙烷改性花生壳粉吸附剂,并考察了其吸附Mn^2＋的影响因素即吸附溶液的pH、金属离子初始质量浓度、吸附时间等.结果表明：在10 g花生壳粉中分别加入1.25 mol/L的NaOH溶液80 mL和环氧氯丙烷30 mL,置于水浴锅中于40℃搅拌反应1 h,水洗干燥后得到环氧氯丙烷改性花生壳粉,用此改性的花生壳粉吸附Mn2＋的最佳条件为：pH值5.0、吸附30 min,用0.2 g环氧氯丙烷改性花生壳粉处理10.0 mg/L的Mn^2＋溶液25 mL吸附率可达100%,最大吸附量不低于29 mg/g;未改性花生壳粉和甲醛改性花生壳粉对Mn^2＋的吸附率仅为53%和43%,最大吸附量分别为5.96 mg/g和1.32 mg/g.     

改性壳聚糖对苯酚吸附条件筛选

开发新型低成本苯酚吸附剂是处理含酚废水的研究重点.将苯酚采用吸附法固定在戊二醛交联的壳聚糖(CTS)上,研究改性壳聚糖对苯酚的吸附效果,并对影响吸附率的主 要因素pH值,吸附时间等进行了研究.结果表明,改性后的壳聚糖对苯酚的吸附能力增强,在pH=5.8,吸附时间为2h时,对苯酚的吸附效果最佳,能够达到52mg/g.改性壳聚糖微球的洗脱和重吸附试验表明:重复使用的微球对苯酚的吸附量保持不变,重复性能良好,因此由戊二醛交联的改性壳聚糖是含酚废水较好的苯酚吸附剂.     

柚子皮生物吸附剂的制备及其对重金属铅离子的吸附应用

废弃的柚子皮中富含大量的木质素、纤维素、多糖及果胶等成分,因而具有与重金属发生作用的功能团,可作为重金属离子的吸附剂。研究以柚子皮粉和经过碱化改性、酯化改性、壳聚糖交联处理的柚子皮粉为吸附剂对铅离子(Pb2+)的吸附情况进行比较,选择出最佳改性处理方法;然后考察最佳改性后的吸附剂在不同的吸附条件下,即吸附时间、吸附温度、Pb2+的初始浓度、吸附时的pH和吸附剂的用量对吸附效率的影响,探究出最佳的吸附剂使用条件;最后探究了吸附剂的吸附动力学特性。结果表明:碱化改性的柚子皮吸附剂在pH为4~6、温度为45℃、吸附剂的投加量为10 g/L、吸附时间为60 min、Pb2+初始浓度约为140 mg/L的条件下,对Pb2+的吸附效果最佳,吸附效率达到92%以上。吸附动力学方程为t/qt=0.207 3+0.103 5 t。     

改性柚子皮对水中Pb2+的吸附行为研究

经NaOH-草酸改性废弃柚子皮制得低成本柚子皮生物吸附剂.通过考察pH值、吸附剂量、铅离子初始质量浓度、吸附时间等影响因素,系统研究改性柚子皮生物吸附剂对水中Pb²⁺的吸附性能;利用红外光谱技术对改性前后柚子皮进行了表征,提出了NaOH-草酸对柚子皮的协同改性机制并对吸附等温线、吸附动力学以及吸附热力学进行了分析.结果表明,柚子皮经NaOH-草酸改性后,可提高羧基官能团数目,使吸附Pb²⁺能力提高.相同条件下,柚子皮及改性柚子皮对Pb²⁺的吸附容量分别是3.68 mg/g和18.76 mg/g.Pb²⁺初始质量浓度50 mg/L、溶液pH值5.0、改性柚子皮生物吸附剂投加量8 g/L、吸附90min时,Pb²⁺去除率为96.10%;Pb²⁺的吸附过程可以用准二级动力学模型以及Langmuir等温模型很好地描述.生物吸附剂对Pb²⁺的吸附是自发的吸热过程.     

改性柿子粉吸附剂对Cd2+的吸附性能

以柿子粉为基体,经丙酮和硫酸缩合改性处理制备柿子生物吸附剂,并对柿子生物吸附剂和原始柿子粉进行红外光谱分析,考察柿子生物吸附剂吸附Cd2+的影响因素如初始pH、温度、时间等,研究吸附动力学、等温吸附模型以及吸附剂的循环再生性能.研究结果表明:改性处理增加了对重金属离子有吸附作用的活性官能团数目并降低了柿子粉的水溶性;柿子生物吸附剂对Cd2+的吸附过程可以很好地用准二级动力学方程描述;吸附等温线均符合Langmuir和Freundlich方程;改性柿子生物吸附剂对Cd2+的最大吸附量为82.78 mg/g.     

有机膨润土对水中2,4-二氯苯酚的吸附性能研究

探讨了不同吸附剂,吸附时间、溶液pH、吸附剂投加量,2,4-二氯苯酚初始质量浓度以及温度等因素下有机改性膨润土对水中2,4-二氯苯酚吸附效果的影响.结果表明:吸附剂质量浓度为10 g/L(投加量为0.25 g)时,在室温(30℃)和自然pH值的条件下,十六烷基二甲基苄基铵盐改性(DK3)对3 000 mg/L的2,4-二氯苯酚溶液吸附60 min吸附效果最好.吸附过程符合伪二级反应动力学模型,吸附等温线符合Langmuir型等温方程,Langmuir理论最大吸附容量在30℃时可达到281.8 mg/g,吸附热力学参数表明吸附过程是放热、自发的物理吸附过程.     

改性小麦秸秆对磷酸根的动态吸附性能

以氯化锌为活化剂对小麦秸秆进行了改性,制备出一种新型炭质吸附剂。以溶液的流速、初始浓度、pH值、温度和吸附剂用量对动态吸附效果的影响进行了研究和分析。结果表明：在溶液流速为5mL／min、初始浓度为50mg／L、pH为7、吸附剂量为3g时,吸附剂的吸附效果最好,在50min基本达到吸附平衡。随着溶液流速的增加,改性小麦秸秆对磷酸根的吸附量逐渐减少;随着溶液初始浓度的增大,吸附床层的穿透点提前;在pH=7时,吸附剂的动态饱和吸附量可达4．294mg／g;吸附区的移动速度随温度的升高而缓慢降低,但幅度不大。     

玉米秸秆纤维素脱除鱼露中铅离子研究

采用秸秆纤维素研究了模拟鱼露中残留铅离子的吸附脱除过程。分别研究了吸附时间、溶液p H值、吸附剂用量以及铅离子的初始浓度对吸附效果的影响。结果表明,当吸附时间为240 min,溶液p H值为6,吸附剂添加量为0.25 g,初始浓度为6 mg/m L时,吸附容量最高达到92.85 mg/g。并且酶解液中高浓度Na Cl与L-谷氨酸皆对铅离子脱除有较大抑制,而多肽对铅离子的吸附具有较大地抑制。实验结果表明,玉米秸秆纤维素对鱼露中铅离子的脱除效果较好。     

改性聚苯乙烯微球对蛋白质的吸附与解吸特性

通过蒸馏–沉淀法制备单分散的聚苯乙烯(PS)微球,并用两亲性聚合物聚乙二醇(PEG)对PS进行修饰.以牛血清蛋白(BSA)为模型,研究PS-PEG微球对BSA的吸附与解吸特性.结果表明,聚合物微球对BSA的吸附受pH、微球上PEG含量以及NaCl溶液质量浓度的影响,作用力为疏水吸附.在无盐水体系下解吸,解吸率最高为96.2%,表明微球在蛋白质分离应用中可重复使用.     

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.     

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.     

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.     

A computer generator for randomly layered structures

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

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.     

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.     

海南岛地体及其毗邻陆缘晚中生代—新生代古地磁研究和构造演化

本文叙述了对海南岛及其毗邻大陆边缘白垩纪到第四纪地层岩石进行古地磁研究的全部工作过程。通过分析岩石中剩余磁矢量的磁偏角及磁倾角的变化,提出海南岛白垩纪以来经历的构造演化模式如下:早期伴随顺时针旋转而向南迁移,后期伴随逆时针转动并向北运移。联系该地区及邻区的地质、地球物理资料,对海南岛上述的构造地体运动提出以下认识:北部湾内早期有一拉张作用,主要是该作用使湾内地壳显著伸长减薄,形成北部湾盆地。从而导致了海南岛的早期构造运动,而海南岛后期的构造运动则主要是受南海海底扩张的影响。海南地体运动规律的阐明对于了解北部湾油气盆地的形成演化有重要的理论和实际意义。     

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.     

《Chinese Science Bulletin》SUBJECT INDEX TO VOLUME 59(2014)

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