Fenton试剂-活性炭吸附处理焦化废水的研究

对Fenton试剂-活性炭吸附联用技术处理焦化废水进行了研究。首先考察了pH值、H2O2投加量、[Fe^2＋]／[H2O2]等因素对Fenton试剂氧化处理效果的影响以及Fenton试剂氧化阶段H2O2投加量对活性炭吸附效果的影响;然后考察活性炭投加量、吸附时间、pH值等因素对活性炭吸附阶段处理效果的影响。结果表明,Fenton试剂-活性炭吸附工艺处理焦化废水的最佳操作条件为：Fenton试剂氧化阶段H2O2投加量为55mmol／L,[Fe^2＋]／[H2O2]=1：10,初始pH=3;活性炭吸附阶段活性炭投加量为2．5g／L,pH=3,吸附时间30min。在此操作条件下,焦化废水COD去除率达97．5％。     

生物活性炭深度处理焦化废水的研究

采用生物活性炭技术深度处理焦化厂生化后出水。结果表明,焦化厂生化后出水（COD为200mg／L、色度为900度）经生物活性炭处理后,COD降为46．9mg／L、色度降至25．8度,达到国家工业再生用水水质标准（COD小于60mg／L,色度小于30）;并与颗粒活性炭深度处理焦化废水相比,生物活性炭法处理焦化废水COD及色度的去除率分别提高了13．4％和5．2％,且生物活性炭使用寿命是颗粒活性炭的3．3倍,生物活性炭的吨水材料费为1．4元,比颗粒活性炭低3．26元。生物活性炭法是一种有效、低成本的焦化废水深度处理方法。     

颗粒活性炭催化臭氧氧化法降解焦化废水有机物

以COD和挥发酚作为焦化废水中有机物的指标,探讨了颗粒活性炭催化臭氧氧化法对有机物的处理效果、活性炭的催化效果和最佳投加量。结果表明添加颗粒活性炭能有效提高臭氧对焦化废水中的COD和挥发酚的降解效果,颗粒活性炭投加量为20g／L时,COD的去除率提高了20％。通过颗粒活性炭吸附试验可以明确颗粒活性炭在臭氧,活性炭系统中的主要作用是催化作用,活性炭的吸附作用只是催化反应的中间过程,基本不会影响有机物的最终去除率。活性炭投加量（10—25g／L）越大,其催化效果越好,但考虑到费用与效益,以20g／L为宜。活性炭作为催化剂重复使用四次后,其催化效果未明显下降。     

微波催化氧化法处理白酒废水

利用微波催化氧化处理白酒废水，其催化氧化的最佳条件为100mL白酒废水，加活性炭1．0g，H202(30％)1.0mL，微波功率为490w，加热时间20min，COD去除率达79．4％，用相似的方法还处理了苯胺等其他5种类型废水，效果较好。同时还进行了活性炭重复性试验，活性炭重复17次，其处理效果不变。     

微波-H2O2-活性炭协同催化氧化处理苯酚废水

采用微波、H2O2和活性炭协同催化氧化法处理苯酚废水，探讨各种因素协同作用以及对苯酚废水处理效果的影响．结果表明，微波-H2O2-活性炭氧化体系能高效快速降解废水中苯酚，100mL初始pH为5、质量浓度为100mg／L的苯酚废水中，在活性炭3g、微波辐射18min、微波辐射功率200W、H2O2质量浓度1．5g／L的最佳处理工艺条件下，苯酚去除率达98．5％．     

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。     

Fenton氧化技术处理含甲醛废水的实验研究

采用Fenton试剂对甲醛废水进行氧化处理,考察了H2O2浓度、Fe2＋浓度、pH值、反应时间等因素对处理效果的影响。在H202投加量为4．5ml／L,n（H202）：n（Fe2＋）=4,pH值为3,反应30rain后,静置5min的条件下,废水中甲醛去除率和COD去除率分别达到89％、82％。结果表明,Fenton试剂对甲醛废水可以取到很好的处理效果。     

TiO02光催化剂处理再生造纸废水的研究

以TiO2为催化剂，用光催化氧化法处理再生造纸废水。讨论了不同实验条件如焙烧温度、焙烧时间、催化剂用量、H2O2用量、光照时间及废水pH值等对废水COD去除率的影响。结果表明：在焙烧温度为500℃，焙烧时间2h，pH=8．0,TiO2用量为2．0g／L，H2O2量（体积分数）0．6％，光照时间4h的条件下，废水COD的去除率可达90％。     

组合工艺处理难降解焦化废水试验研究

采用A^2／O-臭氧氧化．活性炭过滤的组合工艺对焦化废水进行处理,以解决其达标排放。进水COD1267mg／L,NH3-N113mg／L,SS150mg/L左右时．工艺对COD、氨氮、SS的去除率分剐达到93％、95％、95％,出水满足《污水综合排放标准》（GB8978-1996）一级标准。试验结果零明该工艺对焦化摩水...     

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.     

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。