微波诱导降解有机废水的研究进展

概括了微波的作用原理,综述了微波/吸波剂、微波/氧化剂、微波/催化剂/氧化剂联合作用在降解有机废水方面的反应条件、降解效率和原理优势,分析了微波诱导降解在处理有机废水技术中存在的问题,展望了今后的发展方向,为微波诱导降解技术的研究与应用提供参考。     

微波强化氧化处理难降解有机废水研究进展

简述了微波催化反应机理,分析了微波强化氧化处理难降解有机废水的研究现状,探讨了该技术存在的主要问题,对今后的发展方向进行了展望,为微波协同氧化处理难降解有机废水的实际应用提供参考。     

有机废水的处理方法现状及进展

介绍了国内外有机废水的处理方法,特别是近年来出现的一些新型技术,如高级氧化法、Fen ton试剂和生化法联合处理法、超声波技术、电化学催化降解、液膜技术、微波处理技术。探讨了有机难降解废水处理的发展趋势。     

电化学技术降解有机废水研究进展

综述了电催化氧化、光电催化、超声电化学、三维电极电化学技术降解有机废水的研究与应用进展,重点介绍了电化学技术协同降解有机废水的发展现状,对各种电化学方法进行了阐述,探讨了电化学技术降解有机废水的发展趋势,展望了降解有机废水今后的重点研究方向。     

现代生物技术在难降解有机废水处理中的应用

主要介绍了微生物与难降解有机废水处理的最新研究情况,重点综述了高效菌种筛选技术、固定化微生物技术和遗传工程技术等现代生物技术在难降解有机废水中的应用,也简单介绍了聚合酶链式反应技术用于检测废水中的微生物种类．最后对难降解有机废水的现代生物技术处理的发展趋势进行了展望。     

微波协同臭氧降解苯酚废水反应器及工艺研究

为研究微波协同臭氧对苯酚废水降解的有效性,设计了一套微波辐射反应器;将微波协同臭氧降解同微波辐射降解、臭氧降解的降解率进行了比较;并探讨了苯酚废水质量浓度、微波辐射时间、微波功率密度、pH值、臭氧流量以及物料反应温度等条件对苯酚废水降解率的影响.结果 表明:微波协同臭氧能有效提高苯酚废水的降解率,微波协同臭氧降解最佳工...     

微波技术在国内工业废水处理中的研究

微波法作为新型的废水技术,因其具有快速、高效降解处理有机污染物的优越性,已日益得到国内外学者的青睐。文章总结微波加热原理及其加热特性,介绍该技术在国内工业废水处理领域的研究状况,并提出了展望。     

基于微波技术的有机废水降解研究进展

对微波辐射技术在有机废水降解领域的应用和研究状况进行了综述。讨论了应用中存在的一些问题,并对其在该领域的发展前景进行了展望。从降解效率的角度看,现代微波技术将朝着微波辐照和其他氧化手段联合应用的高级氧化技术方向发展。     

基于微波技术的有机废水降解研究进展

对微波辐射技术在有机废水降解领域的应用和研究状况进行了综述。讨论了应用中存在的一些问题,并对其在该领域的发展前景进行了展望。从降解效率的角度看,现代微波技术将朝着微波辐照和其他氧化手段联合应用的高级氧化技术方向发展。     

Fenton及其联合法处理有机废水的研究进展

Fenton法是高级氧化技术的典型代表。采用Fenton法及其各种联合方法处理难降解有机废水,是水处理领域的一个研究重点。综述了Fenton法、超声波Fenton法、电Fenton法、光Fenton法、微波Fenton法等处理有机废水的研究进展,介绍了各种废水处理方法的特点及应用实例,并探讨了各方法存在的问题及今后的研究方向。     

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.     

Direct observation of freeze-thaw instability of latex coatings via high pressure freezing and cryogenic SEM

Despite its industrial importance, the subject of freeze-thaw (F/T) stability of latex coatings has not been studied extensively. There is also a lack of fundamental understanding about the process and the mechanisms through which a coating becomes destabilized. High pressure (2100 bar) freezing fixes the state of water-suspended particles of polymer binder and inorganic pigments without the growth of ice crystals during freezing that produce artifacts in direct imaging scanning electron microscopy (SEM) of fracture surfaces of frozen coatings. We show that by incorporating copolymerizable functional monomers, it is possible to achieve F/T stability in polymer latexes and in low-VOC paints, as judged by the microstructures revealed by the cryogenic SEM technique. Particle coalescence as well as pigment segregation in F/T unstable systems are visualized. In order to achieve F/T stability in paints, latex particles must not flocculate and should provide protection to inorganic pigment and extender particles. Because of the unique capabilities of the cryogenic SEM, we are able to separate the effects of freezing and thawing, and study the influence of the rate of freezing and thawing on F/T stability. Destabilization can be caused by either freezing or thawing. A slow freezing process is more detrimental to F/T stability than a fast freezing process; the latter actually preserves suspension stability during freezing. Presented at the 82nd Annual Meeting of the Federation of Societies for Coatings Technology, October 27–29, 2004 in Chicago, IL. Tied for first place in The John A. Gordon Best Paper Competition.     

Ethanol and (−)-α-Pinene: Attractant Kairomones for Bark and Ambrosia Beetles in the Southeastern US

In 2002–2004, we examined the flight responses of 49 species of native and exotic bark and ambrosia beetles (Coleoptera: Scolytidae and Platypodidae) to traps baited with ethanol and/or (−)-α-pinene in the southeastern US. Eight field trials were conducted in mature pine stands in Alabama, Florida, Georgia, North Carolina, and South Carolina. Funnel traps baited with ethanol lures (release rate, about 0.6 g/day at 25–28°C) were attractive to ten species of ambrosia beetles (Ambrosiodmus tachygraphus, Anisandrus sayi, Dryoxylon onoharaensum, Monarthrum mali, Xyleborinus saxesenii, Xyleborus affinis, Xyleborus ferrugineus, Xylosandrus compactus, Xylosandrus crassiusculus, and Xylosandrus germanus) and two species of bark beetles (Cryptocarenus heveae and Hypothenemus sp.). Traps baited with (−)-α-pinene lures (release rate, 2–6 g/day at 25–28°C) were attractive to five bark beetle species (Dendroctonus terebrans, Hylastes porculus, Hylastes salebrosus, Hylastes tenuis, and Ips grandicollis) and one platypodid ambrosia beetle species (Myoplatypus flavicornis). Ethanol enhanced responses of some species (Xyleborus pubescens, H. porculus, H. salebrosus, H. tenuis, and Pityophthorus cariniceps) to traps baited with (−)-α-pinene in some locations. (−)-α-Pinene interrupted the response of some ambrosia beetle species to traps baited with ethanol, but only the response of D. onoharaensum was interrupted consistently at most locations. Of 23 species of ambrosia beetles captured in our field trials, nine were exotic and accounted for 70–97% of total catches of ambrosia beetles. Our results provide support for the continued use of separate traps baited with ethanol alone and ethanol with (−)-α-pinene to detect and monitor common bark and ambrosia beetles from the southeastern region of the US.     

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.     

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.     

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。