氟化氢生产过程中的污染及防治措施

介绍了氟化氢生产过程中主要污染,主要废气污染物为含氟尾气,废水为渣气洗涤废水,固废为氟石膏。结合国内外现有的污染治理措施,详细评述了现有的废气的治理技术及存在的问题。同时,针对实际产生的情况提出相应的污染防治措施。     

废印刷线路板回收处理技术研究

全面详实的介绍了废印刷线路板的污染现状、对人体及环境的危害。总结了废印刷线路板脱漆、拆解、破碎及各种传统和新型的回收处理技术。文章为回收利用废印刷线路板提供了广阔的思路。需要利用各种技术,互相结合,才能最终实现废印刷线路板的资源化处理。     

医疗固废蒸煮处理过程汞污染的成因、危害及防治措施分析

随着高温蒸煮工艺处理在医疗废物集中处置工程中的应用日渐增多,医疗固废蒸煮过程过程产生的二次污染治理显得更为重要。然对医疗固废蒸煮过程中的汞污染重视不足可能会对环境及健康等造成不良的影响。医疗固废蒸煮处理过程的汞污染治理是非常有必要的。本文分析了医疗固废蒸煮处理过程汞污染形成原因及其对环境、植物和人体健康的危害及防治措施,为同类建设项目环境影响评价废气影响因子的选取及环境保护主管部门的相关管理提供依据。     

净化处理在预焙阳极生产中的应用

介绍了预焙阳极生产过程中废气产生的主要工段～原料破碎、石油焦煅烧、煅后料冷却、配料、混捏成型、阳极焙烧,主要废气污染物为粉尘、煅烧废气、沥青烟气。结合国内外现有的烟气治理措施,阳极生产中设计出不同类型的粉尘、沥青烟尘治理的方法,使我公司的粉尘、沥青烟尘实现达标排放。     

喷涂废气的全过程控制

从喷漆的废气污染来源、释放和治理几个方面,分析了废气污染的防治措施。     

氯气干燥后废硫酸的回收利用及废气治理

介绍了氯碱生产过程中氯气干燥产生的含氯废硫酸的回收循环利用,氯气干燥过程中废气产生的原因进行了分析并提出了相应的治理措施。通过硫酸提浓技术引进及改造措施,实现氯碱生产中氯气干燥废硫酸的回收循环利用,同时解决了氯气干燥过程废气治理问题。     

油田生产中坏境保护的治理措施

针对油田生产中产生的废气污染、污水污染、污油污染以及噪音污染等环境污染,采取管理和技术措施,对其固液气相污染物采取污染防控,为油田生产的污染治理和环境保护提供有利条件。     

国外汽车涂装污染控制技术的发展

汽车涂装产生的公害为废气、废水及废漆渣等，其中废气污染最严重。本文介绍了减少溶剂释放的方法、废漆的处理和回收，各种废水处理方法以及涂装车间设计的一些原则。     

制革企业污染防治措施现状与发展方向

制革属重污染行业,在原皮生产加工过程中会产生大量的废水、固废和废气等污染物。制革废水是制革企业污染防治的重点,我国早在2006年已提出污水分流分治处理的要求,但推行效果并不理想。该文在对现阶段我国主要制革废水治理措施进行分析的基础上,分析制革企业采取废水污染防治措施有效性和存在的不足,对如何真正实现污水分流分治和生产全过程污染控制提出建议,探讨制革企业污染防治措施发展方向。     

化工企业废气处理技术的分析探讨

化工企业工业生产过程中产生的"三废"已经成为环保治理的重点。由于化工企业产生的"三废"的特殊性、化学差异性、危害性等原因,对于不同性质化工企业三废污染治理的方法差异也很大。本文主要探讨分析研究了化工企业工业生产过程中产生的废气常规处理方法。为后续化工企业废气治理专项工程提供指导。     

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。