Fenton试剂对含锰矿井废水处理实验

为了解决矿井水中锰去除难度较大的问题,使用Fenton试剂对含锰矿井水进行处理。考察了H2O2:Fe2+、反应温度、H2O2的投加量、pH、反应时间对Fenton试剂氧化除锰的影响,并讨论了Fenton试剂高级氧化除锰的机理。研究结果表明:Fenton试剂对含锰矿井水的处理效果很好,原水中Mn2+的初始浓度为2 mg/L,当H2O2:Fe2+摩尔比为3:1,反应温度为25°C,H2O2的投加量为8 mmol/L,pH值为5,反应时间为10 min的时候,Mn2+的去除效率可以达到84%。Fenton试剂生成的具有强氧化性的.OH能有效处理矿井水中的Mn2+。     

腈纶废水的光催化氧化技术研究

采用UV/Fenton氧化处理难降解腈纶废水,研究了Fe2 和H2O2的投加量、pH值、光照时间、光照强度、有机物的浓度等条件对降解腈纶废水效果的影响.通过实验得出了UV/Fenton试剂氧化处理腈纶废水的最佳反应条件为:原水样pH3,Fe2 浓度为10 mmol·L-1,H2O2浓度为20 mmol·L-1,紫外光照强度为l000W(λ=365nm),光照时间为50min,COD降解率最高达62.77%.     

废水中十六烷基三甲基溴化铵的Fenton氧化降解

研究了废水中阳离子表面活性剂十六烷基三甲基溴化铵(CTAB)的Fenton氧化降解.考察了H2O2及Fe2+的浓度、pH值和反应时间对去除效果的影响.优化后的降解反应的条件是:pH为3.0,H2O2与CTAB浓度质量比为1:2.3,Fe2+质量浓度为20.0 mg·L-1.当CTAB初始质量浓度为20.0 mg·L-1时,在最佳反应条件下,CTAB的去除率可在30 min达到90%以上,H2O2浓度的增大有助于提高TOC的去除率.降解产物中检出CHOOH和CO2等.实验结果表明Fenton氧化降解法可以快速有效除去废水中的季铵盐阳离子表面活性剂.     

Fenton法深度氧化湿法腈纶废水二级生化处理出水

采用Fenton氧化的方法对湿法腈纶废水二级生化出水进行深度氧化处理.通过单因素实验考察了Fenton试剂投加量、初始pH值及反应时间对该废水处理效果的影响.研究表明,ρH2O2为300mg/L,ρFe2+为300 mg/L,反应初始pH值为3.0,反应时间为120 min时,Fenton氧化反应对COD达到最大去除率57%.另外,通过FT-IR和三维荧光光谱分析探讨了该废水有机污染物在Fenton氧化过程中的去除规律.结果表明,生化出水中某些难降解芳香性物质可以被Fenton试剂氧化分解,废水的可生化性得到提升.     

Fenton试剂氧化预处理橡胶促进剂生产废水

采用Fenton试剂氧化处理橡胶促进剂生产废水.研究H2O2投加量、Fe2 投加量、反应时间及进水浓度对COD去除率的影响,通过实验确定了Fenton试剂处理该废水的最佳操作条件为:Fe2 加入量0.4g.L-1,反应时间20 min,H2O2加入量为18 mL.L-1,pH=3.     

Fenton试剂氧化降解左氧氟沙星的实验研究

左氧氟沙星(Levofloxacin,LEVO)是目前应用最广泛的喹诺酮类药物之一,其在多种环境基质中被频繁检出,对生态系统和人类健康造成潜在危害。采用Fenton试剂(H2O2-Fe2+)氧化降解水中LEVO,通过正交试验初步筛选出适宜的反应条件并针对各影响因素分别开展深入研究。实验结果表明,选定的4个因素对Fenton试剂降解LEVO的影响权重,从大到小依次为:Fe2+的初始浓度、反应时间、H2O2的初始浓度、初始pH值。当选取反应条件pH=6,H2O2和Fe2+初始浓度分别为0.75 mmol/L和150μmol/L时,处理初始浓度为50μmol/L的LEVO溶液60 s,LEVO的去除率达到96.5%,说明Fenton试剂可有效去除水溶液中的LEVO。该研究为处理含LEVO等难生物降解的有机物废水提供了一定的理论和数据支持。     

硝基苯类制药废水催化氧化降解的研究

采用超声波/Fenton试剂降解硝基苯类制药废水,研究了有关的工艺条件和硝基苯降解率的关系,并对其降解动力学规律进行了初步探讨。结果表明,降解反应的最佳工艺条件为：在常温常压下,反应时间为40 min,pH值为3,H2O2浓度和Fe2＋浓度分别为200 mmol和20 mmol/L,超声功率为400 W,硝基苯降解效率可达94%。超声/Fenton对废水的处理符合一级动力学规律,超声/Fenton缩短了反应时间,提高了降解效率,体现了协同作用的优点。     

UV/Fenton/杂多酸体系光催化氧化结晶紫

由于光助Fenton反应产生大量·OH而使有机物得以氧化降解,杂多酸具有强的紫外光吸收特性,可以作为Fenton反应的活化剂.研究以结晶紫为底物,考察了UV/Fenton/杂多酸体系对染料的降解作用,考察了pH值、H2O2的用量、Fe2+的用量、杂多酸的引入等因素的影响,确定了优化的实验条件:在结晶紫的浓度是20 mg·L-1时,加入2.4 g·L-1 30%的H2O2,0.02 g·L-1 的Fe2+,0.024 g·L-1的磷钨酸,pH2.7时反应60min后测得脱色率高达95%.研究结果表明:紫外光能有效地促进结晶紫的氧化脱色,引入杂多酸催化剂后,可增强Fenton试剂的反应活性,大大缩短反应时间.     

Fenton试剂处理二硝基重氮酚工业废水的研究

二硝基重氮酚(简称DDNP)是一种性能优良的起爆药,但生产过程中产生大量的工业废水,一般工艺处理困难。Fenton法(Fe2+和H2O2组成的氧化体系)是对难降解有机物处理过程的一种高级氧化工艺。研究了Fenton试剂处理DDNP废水的工艺条件。实验结果表明:投加[PAC]=3g·L-1,[FeSO4]=0.5～0.8g·L-1,[30%H2O2]=5ml·L-1,pH=3.5;石灰为1g·L-1;在常温下可以使废水的CODcr去除90%以上,色度小于100。处理后的废水至少可以回用于冲洗设备、工具、地面等,以节约水资源。     

Fenton试剂与厌氧微生物结合处理模拟印染废水的研究

以活性艳红KD-8B溶液作为模拟印染废水,采用Fenton试剂法对其进行催化降解.考察了体系初始pH值、H2O2和FeSO4的投加量以及反应时间等因素对模拟废水的色度及COD去除率的影响,优化了反应条件.实验确定最佳反应条件为:室温下,pH=2.5,[Fe2+]=3.0 mmol/L,[H2O2]=39.2 mmol/L,反应时间40 min,30 mg/L的模拟染料废水脱色率和COD去除率分别达到96.6％和86.7％.Fenton试剂与厌氧微生物处理相结合的处理方式,可以显著提高模拟废水的色度和COD去除率,均达98％以上,尤其COD的去除率比单纯采用厌氧生物法和Fenton试剂法分别高出34.6％和13.1％.     

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.     

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.     

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。     

Quantitative trait loci （QTLs） for quality traits related to protein and starch in wheat

Quality traits in wheat （Triticum aestirum L.） were studied by quantitative trait locus （QTL） analysis in a recombinant inbred line （RIL） population, a set of 131 lines derived from Chuan 35050 × Shannong 483 cross （ChSh）. Grains from RILs were assayed for 21 quality traits related to protein and starch. A total of 35 putative QTLs for 19 traits with a single QTL explaining 7.99-40.52% of phenotypic variations were detected on 10 chromosomes, 1D, 2A, 2D, 3B, 3D, 5A, 6A, 6B, 6D, and 7B. The additive effects of 30 QTLs were positive, contributed by Chuan 35050, the remaining 5 QTLs were negative with the additive effect contributed by Shannong 483. For protein traits, 15 QTLs were obtained and most of them were located on chromosomes 1 D, 3B and 6D, while 20 QTLs for starch traits were detected and most of them were located on chromosomes 3D, 6B and 7B. Only 7 QTLs for protein and starch traits were co-located in three regions on chromosomes 1D, 2A and 2D. These protein and starch trait QTLs showed a distinct distribution pattern in certain regions and chromosomes. Twenty-two QTLs were clustered in 6 regions of 5 chromosomes. Two QTL clusters for protein traits were located on chromosomes 1D and 3B, respectively, three clusters for starch traits on chromosomes 3D, 6B and 7B, and one cluster including protein and starch traits on chromosome 1D.     

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.     

The Analects and the Moment in Peking——The influence of a Confucian education system on the personality formation,the way of thinking and the fate of the main characters

0.Preface China has long been boasting of its colorful and immense culture which comprises of Taoism,Confucianism and Buddhism.The interwoven influence among the religions on Chinese way of thinking,on the nation＇s behavior in their social life throughout the long history is beyond list.