有机改性膨润土的制备及甲基橙废水脱色工艺研究

以十八烷基三甲基氯化铵（1831）为改性剂,制得有机阳离子改性膨润土．研究了有机膨润土投加量、吸附时间、废水pH值及废水初始浓度对甲基橙废水脱色率的影响．实验结果表明,有机阳离子改性膨润土投加量为1．5g／L,吸附时间为60min,废水pH值为8．0,废水初始浓度为100mg／L时,有机阳离子改性膨润土对甲基橙废水的脱色率达到98．08％．     

有机改性膨润土吸附模拟染料废水的工艺条件

为提高天然膨润土的吸附性能,以十六烷基三甲基氯化铵（CTAC）为改性剂,制备有机阳离子改性膨润土,并通过吸附实验分析有机改性剂用量、吸附时间、改性膨润土投加量、废水pH及初始质量浓度对模拟染料废水脱色率的影响。结果表明：有机改性剂质量分数为20%,有机改性膨润土投加量为1.0 g/L,振荡时间为30 min,废水pH为6.0,初始质量浓度为40 mg/L时,有机改性膨润土对模拟染料废水的处理效果最佳,脱色率可达到95.66%。该研究为新型改性膨润土处理染料废水提供了技术参考。     

有机改性膨润土对氧化乐果的吸附作用

以钙基膨润土为原料,经提纯钠化后用十二烷基三甲基溴化铵进行有机改性.探讨了有机膨润土对有机磷农药氧化乐果的吸附性能,考察了pH、温度、吸附时间以及有机膨润土用量对吸附效果的影响.结果表明,改性膨润土对水中氧化乐果的去除能力优于原土,对50 mL浓度为0.8 g/L的氧化乐果溶液,在pH值为7.0、温度25℃、吸附时间30 min、有机膨润土投加量10 g/L条件下,对氧化乐果的去除率可达80.6%.     

超声波改性沸石去除油田废水COD的实验研究

为寻求廉价的吸附材料,本文利用了超声波改性沸石和活性炭处理油田废水中的COD进行吸附处理,讨论了吸附时间、投加量、废水的pH等影响因素对COD去除的影响,并对几种影响因素进行了正交实验设计.结果表明:当活性炭与改性沸石的质量比为1:1,吸附时间为30min,pH为7时得到最佳COD去除率53.82%.考虑到成本问题,超声波改性沸石在油田废水处理方面具有较好的应用前景.     

改性蒙脱土对废水中苯酚吸附性能研究

以钙基膨润土为原料,经提纯钠化后用十六烷基三甲基溴化铵(CTMAB)进行有机改性,制得有机蒙脱土,探讨了其对废水中苯酚的吸附性能.结果表明,对50 mL浓度为50 mg/L的苯酚溶液,在溶液pH值为6.3、温度35℃、吸附时间50 min、有机蒙脱土投加量20 g/L条件下,对苯酚的脱除率可达78%.     

改性膨润土处理酸性大红染料废水试验研究

染料在工业中被越来越广泛地使用,其产生的废水已经成为目前较为难处理的工业废水之一.以壳聚糖为改性剂,对资源丰富的天然膨润土进行有机改性,制得一种新型水处理剂--壳聚糖改性膨润土.采用物理吸附法对酸性大红染料废水进行处理,考查了pH值、搅拌时间、投土量、离心时间4个因素的影响,确定了最佳处理工艺条件:pH值4、搅拌6 min、投土量14 g/L、离心17 min.此时处理效果最佳,脱色率可达97%.此外,通过对原土和壳聚糖改性膨润土进行的比表面积、红外光谱和扫描电镜等表征测定分析可知,壳聚糖的加入并没有改变膨润土的基本框架,只是增大了膨润土的比表面积,从而提高吸附性能.     

NaCl改性沸石去除废水中氨氮的条件优化研究

通过实验考察了沸石粒径、投加量、废水pH和吸附时间对NaCl改性沸石去除废水中氨氮的影响,结合单因子实验和正交实验获得优化条件组合,并在优化组合条件下,将NaCl改性沸石去除氨氮效果在实际废水中进行验证.结果表明,粒径越小越利于NaCl改性沸石对废水中氨氮的去除,而投加量、废水pH和吸附时间亦对改性沸石去除氨氮产生影响,通过正交优化实验分析得出,最主要影响因素为沸石投加量,结合单因子实验,筛选出改性沸石去除废水中氨氮的最佳工艺组合条件为沸石粒径60目、沸石投加量70g/L、废水pH=6、吸附时间1h,废水中氨氮去除率达到90.5%.在最佳工艺组合条件下,NaCl改性沸石对生活污水、养猪废水和化工工业废水中氨氮的去除率分别为91.67%、91.65%和89.31%,与在模拟废水中的去除率基本一致.这为改性沸石的进一步实际应用奠定了基础.     

钙基改性膨润土吸附处理石化废水研究

为了提高膨润土的吸附性能,采用不同改性方法改性钙基膨润土,筛选最佳改性吸附剂处理石化废水,进一步探究吸附剂的投加量、废水初始p H值、反应时间、反应温度以及废水初始浓度等因素对石化废水处理效果的影响。实验结果表明,采用溴化十六烷基三甲铵改性的钙基膨润土,在废水初始浓度为120mg/L,初始p H值为9,吸附剂投加量为0.9g/L,在35℃下反应30min时,石化废水中COD的去除率达到80.33%。改性膨润土的最佳重复利用次数为2次。     

有机改性膨润土法处理印钞废水

采用有机改性膨润土法对某印钞厂的高浓度有机难降解废水进行处理以降低水中的有机污染物和水体颜色.实验结果显示,聚合氯化铝(PAC)投加量对于处理效果的影响最大,当膨润土投加量为15 g.L-1,聚合氯化铝投加量为3.5 g.L-1,搅拌时间为0.5h时,处理效果最佳,印钞废水吸光度去除率高达96.55%,化学需氧量(COD)去除率最高达到73.31%.使用该方法对印钞废水处理,可以有效降低水体COD和表观颜色,并且不引入新的污染物,无浓水排放,非常适合作为废水深度处理的预处理工艺.     

钢铁冶金高浊废水处理技术

向钢铁冶金高浊废水中复配投加聚合氯化铝和膨润土,以浊度、CODα的去除率为指标,通过对投加顺序、pH值、投加量、温度、搅拌速度、搅拌时间、原水浊度等因素的考察,确定合适的工艺条件。结果表明：在pH值为12,搅拌速度为200r／min,搅拌20min的条件下,先投加膨润土,后投加聚合氯化铝,膨润土和聚合氯化铝投加量分别为150和5mg／L,对于CODα值在180～220mg／L范围内、浊度为9250-480NTU范围内的钢铁高浊度废水,CODα去除率可达80％以上,浊度去除率达到99．9％以上处理效果优于膨润土和聚合氯化铝单独投加,且具有良好的经济性,为钢铁冶金废水的处理提供一种新思路,具有实际生产意义。     

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.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

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.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

橡胶颗粒沥青混合料低温抗裂性试验研究

以AC-13级配为基础,将橡胶颗粒代替部分集料掺入混合料中,以低温弯曲试验为评价方法对不同橡胶颗粒掺量下沥青混合料的低温抗裂性进行研究,并引入应变能密度值对混合料的低温抗裂性进行综合评价.试验结果表明:橡胶颗粒沥青混合料试件的破坏微应变均超过2 300,满足冬寒区的技术指标;无论是否掺加橡胶颗粒,随着温度的下降,沥青混合料破坏时的最大弯拉强度增大,弯拉应变降低,劲度模量增大;弯曲应变能密度在胶粒掺量为1%左右时具有较大的弯曲应变能密度值,此时橡胶颗粒沥青混合料具有较好的低温抗裂性.     

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.