新型Fenton试剂处理纸机白水的研究

研究利用MnO2和FeSO4共同催化的新型Fenton试剂处理纸机白水的生化出水,考察了初始pH、FeSO4投加量、H2O2投加量以及MnO2的催化氧化对废水中COD和色度去除率的影响。结果表明:在pH=3.0、FeSO4投加量为300 mg/L、H2O2投加量为0.5 mL/L,反应时间为1 h,出水COD可降至60 mg/L以下,色度可达到4倍。投加MnO2可提高Fenton试剂对COD去除率,且可减少H2O2投加量。     

超声波-Fenton法协同降解含表面活性剂SDS弱酸艳红染料废水的研究

采用Fenton氧化、超声辐射和超声-Fenton氧化三种方法处理含阴离子表面活性剂SDS的弱酸艳红B染料废水,考察溶液初始pH、H2O2投加量、FeSO4投加量、反应时间和超声功率对废水色度和COD的影响。结果表明:单独超声对废水色度和COD的去除没有效果,超声-Fenton氧化法对废水COD的去除效果明显优于Fenton氧化法。在pH 2.5,温度50℃,H2O2投加量4 mL/L,FeSO4投加量300 mg/L,反应时间90 min及超声功率400 W的条件下,废水色度去除率为98%,COD去除率为72%,比单独Fenton氧化法COD去除率提高25%。     

深度氧化技术处理皂素废水的研究

采用Fenton试剂深度氧化技术处理皂素废水,研究了FeSO4·7H2O投加量、H2O2投加量、pH值和反应时间4个因素对废水中COD去除效果的影响。实验结果表明,当FeSO4·7H2O投加量为7g/L,H2O2投加量为170g/L,pH值为4,反应时间为50min条件下,COD去除效果最佳,可达到88.23%。各因素对COD去除率影响的强弱顺序为:H2O2投加量>FeSO4·7H2O投加量>pH值。     

Fenton—PAM联合处理焦化废水

首先用活化粉煤灰预处理焦化废水,COD去除率最大可达17％。然后利用Fenton试剂和PAM联合作用对焦化废水深度处理,单因素实验和正交试验结果表明,当pH=5,H2O2投加量为3mL／L,FeSO4·7H2O的投加量为6g／L,PAM的投加量为0．5g／L,反应时间为2h,处理效果最佳,COD和色度的去除率分别可达去90．8％和91．25％。各因素对COD去除率影响的强弱顺序为：PAM投加量〉pH值〉H2O2投加量〉FeSO4·7H2O投加量。     

UV/Fenton体系催化氧化亚甲基蓝研究

以亚甲基蓝为底物,采用UV/Fenton体系进行染料的催化氧化处理,考察了Fe2+浓度、H2O2的投加量、pH值、反应时间等对色度的影响。结果显示,在9.9 g/L FeSO4.7H2O的投加量为1.5 mL,质量分数为30%的H2O2投加量为2 mL,pH值为3.8,反应时间为20 min时,色度去除率达到98.2%。同时与UV/H2O2处理方法进行了对比实验,发现UV/Fenton体系有更好的处理效果。     

响应曲面优化Fenton法处理反渗透浓排水

采用Fenton氧化法处理炼化污水回用水中的反渗透浓排水,在单因素实验的基础上,应用Box-Behnken中心组合设计建立数学模型,以COD去除率为考察指标,进行响应面分析。单因素实验表明,在质量分数30%的H2O2投加量为0.6 mL/L、FeSO4·7H2O投加量为1.8 g/L、初始pH为3、反应1.5 h及H2O2分3次投加时,COD去除率为58.61%。通过Box-Behnken实验设计和方差分析可知,FeSO4·7H2O投加量和pH之间的交互作用比较显著。反应优化组合条件是H2O2投加量为0.66 mL/L、初始pH为3.01、FeSO4·7H2O的加入量为2.45 g/L,在此条件下COD去除率为59.96%。采用响应面法对Fenton法处理反渗透浓排水进行优化合理可行。     

铁炭微电解吸附-Fenton氧化联合处理高浓度有机实验室废水的研究

采用铁炭微电解吸附-Fenton氧化、超声联合工艺处理高浓度有机实验室废水,研究了pH值、H2O2投加量、FeSO4投加量、反应时间等因素对COD去除率的影响。结果表明:铁炭微电解吸附体系在pH=5、Fe∶C体积比为1∶1、时间为3h条件下COD去除率为24%;再经Fenton氧化控制反应时间2h,在FeSO4投加量为6g/L、H2O2投加量为90mL/L、pH=3的处理条件下,废水COD总去除率达48.32%。     

Fenton氧化法预处理高浓度制药废水的实验研究

采用Fenton法对高浓度制药废水进行预处理实验。主要考察了Fenton试剂氧化法预处理高浓度制药废水的影响因素,主要讨论pH值、FeSO4·7H2O投加量、反应时间对Fenton氧化工艺对制药废水中CODCr处理效果的影响。实验结果显示,pH值为4、反应时间100 min、FeSO4·7H2O投加量为0.024 mol/L、H2O2/Fe2＋投加比为11∶1,CODCr处理去除率为52.1%,可生化性BOD/COD为0.57,效果最为理想。     

微波-Fenton氧化法处理焦化废水研究

用微波-Fenton氧化法深度处理焦化废水,研究了微波处理时间、微波功率、FeSO4投加量、H2O2投加量、H2O2投加次数和pH值的影响。实验确定的最佳工艺条件为:废水pH为3,FeSO4投加量为300mg/L,H2O2总投加量为900mg/L,H2O2分3次投加,微波功率500W,温度设为50℃,反应时间为30min。废水浊度、色度和COD去除率分别为97.59%、95.62%、86.21%。处理后的废水澄清透明,剩余COD为50.34mg/L,浊度、色度和COD达到工业回用水标准。     

活性炭协同Fenton氧化处理兰炭废水生化出水的研究

采用活性炭协同Fenton氧化的方法深度处理兰炭废水生化出水,讨论了pH、H2O2投加量、硫酸亚铁投加量、反应时间,活性炭投加量对COD去除率的影响。结果表明：pH为4,H2O2（30％）投加量为2．4mL／L,FeSO4-7H2O投加量为200mg几,反应时间为30min,活性炭投加景为3g／L时,COD去除率最高,达到国家一级排放要求。     

Insect antifeedant properties of anthranoids from the genusVismia

Vismiones and ferruginins, representatives of a new class of lypophilic anthranoids from the genusVismia were found to inhibit feeding in larvae of species ofSpodoptera, Heliothis, and inLocusta migratoria.     

Methyl 2,4,6-decatrienoates Attract Stink Bugs and Tachinid Parasitoids

Halyomorpha halys (Stål) (Pentatomidae), called the brown marmorated stink bug (BMSB), is a newly invasive species in the eastern USA that is rapidly spreading from the original point of establishment in Allentown, PA. In its native range, the BMSB is reportedly attracted to methyl (E,E,Z)-2,4,6-decatrienoate, the male-produced pheromone of another pentatomid common in eastern Asia, Plautia stali Scott. In North America, Thyanta spp. are the only pentatomids known to produce methyl 2,4,6-decatrienoate [the (E,Z,Z)-isomer] as part of their pheromones. Methyl 2,4,6-decatrienoates were field-tested in Maryland to monitor the spread of the BMSB and to explore the possibility that Thyanta spp. are an alternate host for parasitic tachinid flies that use stink bug pheromones as host-finding kairomones. Here we report the first captures of adult and nymph BMSBs in traps baited with methyl (E,E,Z)-2,4,6-decatrienoate in central Maryland and present data verifying that the tachinid, Euclytia flava (Townsend), exploits methyl (E,Z,Z)-2,4,6-decatrienoate as a kairomone. We also report the unexpected finding that various isomers of methyl 2,4,6-decatrienoate attract Acrosternum hilare (Say), although this bug apparently does not produce methyl decatrienoates. Other stink bugs and tachinids native to North America were also attracted to methyl 2,4,6-decatrienoates. These data indicate there are Heteroptera in North America in addition to Thyanta spp. that probably use methyl 2,4,6-decatrienoates as pheromones. The evidence that some pentatomids exploit the pheromones of other true bugs as kairomones to find food or to congregate as a passive defense against tachinid parasitism is discussed.     

2005～2006年国外塑料工业进展

收集了2005年7月～2006年6月国外塑料工业的相关资料，介绍了2005—2006年国外塑料工业的发展情况。提供了世界塑料产量、消费量及全球各类树脂生产量以及各国塑料制品的进出口情况。作为对比，介绍了中国塑料的生产情况。按通用热塑性树脂（聚乙烯、聚丙烯、聚苯乙烯、聚氯乙烯、ABS树脂）、工程塑料（聚酰胺、聚碳酸酯、聚甲醛、热塑性聚酯、聚苯醚）、通用热固性树脂（酚醛、聚氨酯、不饱和树脂、环氧树脂）、特种工程塑料（聚苯硫醚、液晶聚合物、聚醚醚酮）的品种顺序，对树脂的产量、消费量、供需状况及合成工艺、产品开发、树脂品种的延伸及应用的扩展作了详细的介绍。     

2007～2008年世界塑料工业进展

收集了2007年7月～2008年6月世界塑料工业的相关资料,介绍了2007～2008年国外塑料工业的发展情况,提供了世界塑料产量、消费量及全球各类树脂的需求量及产能情况.按通用热塑性树脂(聚乙烯、聚丙烯、聚苯乙烯、聚氯乙烯、ABS树脂)、工程塑料(尼龙、聚碳酸酯、聚甲醛、热塑性聚酯、聚苯醚)、特种工程塑料(聚苯·硫醚、液晶聚合物、聚醚醚酮)、通用热固性树脂(酚醛、聚氨酯、不饱和聚酯树脂、环氧树脂)不同品种的顺序,对树脂的产量、消费量、供需状况及合成工艺、产品应用开发、树脂品种的延伸及应用的进一步扩展等技术作了详细介绍.     

Inorganic/organic nanocomposite coatings: The next step in coating performance

Inorganic/organic hybrid materials have considerable promise and are beginning to become a major area of research for many coating usages, including abrasion and corrosion resistance. Our primary approach is to prepare the inorganic phase in situ within the film formation process of the organic phase. The inorganic phase is introduced via sol-gel chemistry into a thermosetting organic phase. By this method, the size, periodicity, spatial positioning, and density of the inorganic phase can be controlled. An important aspect of the inorganic/organic hybrid materials is the coupling agent. The initial task of the coupling agent is to provide uniform mixing of the oligomeric organic phase with the sol-gel precursors, which are otherwise immiscible. UV-curable inorganic/organic hybrid systems have the advantages of a rapid cure and the ability to be used on heat sensitive substrates such as molded plastics. Also, it is possible to have better control of the growth of the inorganic phase using UV curing. It is our ultimate goal to completely separate the curing of inorganic and organic phases to gain complete control over the morphology, and hence optimization of “all” the coating properties. Thus far, it has been found that concomitant UV curing of the inorganic and organic phases using titanium sol-gel precursors afforded nanocomposite coatings which completely block the substrate from UV light while maintaining a transparent to visible light. Also, it has been found that the morphology of the inorganic phase is highly dependent on the concentration and reactivity of the coupling agent. Presented at the 82nd Annual Meeting of the Federation of Societies for Coatings Technology, October 27–29, 2004, in Chicago, IL.     

Ethanol and (−)-α-Pinene: Attractant Kairomones for Some Large Wood-Boring Beetles in Southeastern USA

Ethanol and α-pinene were tested as attractants for large wood-boring pine beetles in Alabama, Florida, Georgia, North Carolina, and South Carolina in 2002–2004. Multiple-funnel traps baited with (−)-α-pinene (released at about 2 g/d at 25–28°C) were attractive to the following Cerambycidae: Acanthocinus nodosus, A. obsoletus, Arhopalus rusticus nubilus, Asemum striatum, Monochamus titillator, Prionus pocularis, Xylotrechus integer, and X. sagittatus sagittatus. Buprestis lineata (Buprestidae), Alaus myops (Elateridae), and Hylobius pales and Pachylobius picivorus (Curculionidae) were also attracted to traps baited with (−)-α-pinene. In many locations, ethanol synergized attraction of the cerambycids Acanthocinus nodosus, A. obsoletus, Arhopalus r. nubilus, Monochamus titillator, and Xylotrechus s. sagittatus (but not Asemum striatum, Prionus pocularis, or Xylotrechus integer) to traps baited with (−)-α-pinene. Similarly, attraction of Alaus myops, Hylobius pales, and Pachylobius picivorus (but not Buprestis lineata) to traps baited with (−)-α-pinene was synergized by ethanol. These results provide support for the use of traps baited with ethanol and (−)-α-pinene to detect and monitor common large wood-boring beetles from the southeastern region of the USA at ports-of-entry in other countries, as well as forested areas in the USA.