厂区雨水回用的案例分析与建议

发电厂厂区雨水一般收集后排放,由于电厂其它下水道、排水沟的渗漏,影响了雨水水质。该文通过对雨水系统的回用管理,发现了生产过程中存在的问题,并进行了整改完善,实现了初步回用,同时提出了依托电厂灰渣库,建设雨水蓄水池进行深度利用的建议。     

某工程雨水回用系统设计与分析

根据绿色建筑要求,对本工程雨水进行回收利用,介绍了本工程雨水回用系统的组成,对不同系统形式进行了比较分析,最后根据项目情况,对雨水回用系统进行设计计算。     

屋面雨水收集回用系统设计探讨

介绍了屋面雨水收集回用系统的各部分构成要素及其特点,并详细地分析了屋面雨水收集系统的计算方法和屋面雨水回用系统设计过程中应注意的要点,对建筑屋面雨水收集回用系统的设计具有一定的指导意义。     

深圳某小区节水技术探索

介绍了深圳某小区所采用的中水回用技术和雨水资源化技术,并对其节水效果进行了探讨。处理后的生活污水和雨水可以作为中水回用,实现了污水零排放和雨水资源化。     

海绵城市理念在城市绿道雨水回用设计中的应用

在城市绿道设计中,不仅要落实海绵城市设计要求,也要充分利用雨水及湖水资源。以武汉后官湖绿道设计为例,从水量的分析、雨水的收集、处理与回用以及湖水的补给等方面详细阐述了城市绿道雨水回用的系统设计。     

城市雨水收集利用研究现状与进展

当前国内许多城市都面临着水污染严重和水资源短缺的问题,雨水的收集利用已成为一种必然的趋势。对国内外雨水收集利用的法律法规建设、发展现状进行了综述,总结了雨水收集利用技术、现行的回用雨水的水质标准,以及雨水处理工艺。     

城市雨水的利用方法及进展

阐述了城市雨水的水量充沛、水质相对稳定和处理成本低廉等特点,强调雨水资源回用的重要性,综述国内外雨水回收利用的不同技术和方法及研究现状,并对城市雨水收集利用技术的发展进行展望。     

城市雨水的利用方法及进展

阐述了城市雨水的水量充沛、水质相对稳定和处理成本低廉等特点,强调雨水资源回用的重要性,综述国内外雨水回收利用的不同技术和方法及研究现状,并对城市雨水收集利用技术的发展进行展望。     

工业区初期雨水污染控制

工业区初期雨水的污染物成分相比城市中心区初期雨水要复杂得多,若没有经过适当地处理将会对后期雨水造成污染,影响回用。通过分析工业区初期雨水的污染来源及污染特征,结合案例对工业初期雨水收集处理技术进行了详细介绍,以期为我国工业区初期雨水污染控制提供参考和借鉴。     

城市雨水利用系统的模糊层次综合评价

为明确城市雨水利用系统的综合效益,以促进其在居住小区的推广应用,采用模糊层次分析法(F-AHP)建立了一种简单的雨水利用系统综合评价模型,分别对雨水收集回用和雨水下渗两种方案进行评价。结果表明,前者经济效益和社会效益均较好,后者环境效益显著。该模型为促进城市雨水利用系统的建设提供了科学依据。     

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。