过滤-树脂吸附法处理焦化废水的研究

采用高温炉渣过滤 ,再用南开牌 H - 10 3大孔树脂室温下以 4BV/h流速吸附处理含酚 5 2 0 mg/L、COD 32 0 0 m g/L的焦化废水 ,调节废水 p H值为 6 ,处理体积为 6 0 BV ,处理出水酚含量≤ 0 .5 m g/L ,COD≤ 80mg/L ,达到国家排放标准。选用 0 .5 BV甲醇做脱附剂 ,室温下以 2 BV/h流速进行洗脱再生 ,脱附率达 99%以上。经 10 0次循环使用 ,树脂性能不变。脱附剂脱附达饱和后 ,再通过蒸馏回收甲醇和其中的酚 ,残渣进行焚烧处理     

树脂吸附法回收焦化废水中的酚

通过静态吸附实验确定处理焦化废水中酚的最佳吸附树脂是NDA-99超高交联吸附树脂,并通过动态实验确定了树脂吸附法处理焦化废水中酚的最佳工艺条件是:pH为4.0,吸附流量为40mL/h,单柱废水处理量为300mL/批;在50℃下用10mL质量分数为8%的NaOH 10mL质量分数为4%的NaOH 20mL水脱附,流量为10mL/h;处理后废水中挥发酚质量浓度从1380mg/L降到12mg/L,COD从15500mg/L降到650mg/L。低浓度脱附液套用,高浓度脱附液用异丙醚萃取—蒸馏法回收杂酚,实现了焦化废水中酚的资源化。     

"混凝+生化"处理高浓度染料废水的试验研究

染料废水水质复杂，常规工艺很难处理。以河北某生产染料化工厂的废水为对象，对其处理工艺进行了试验研究。结果表明，采用“PFS MS”两步混凝 水解酸化 生物接触氧化 炉渣吸附工艺处理染料废水取得了良好的效果。处理后色度由原水的11111倍降至80倍，CODCr由7762mg／L降至310mg/L，去除率分别为99．3％和96．0％。     

树脂吸附法处理二氯吡啶酸生产废水

利用自制的吸附树脂,对难降解的二氯吡啶酸农药废水进行了处理,实验考查了pH、温度、浓度等因素对该废水吸附的影响,得出了该方法处理二氯吡啶酸废水的最佳工艺条件:室温、pH:1.0、流速为5 BV/h.在该条件下对CODCr为15 013.6 mg/L的二氯吡啶酸生产废水进行处理,其CODCr可降至100 mg/L以下,处理水量为8 BV(1 BV=30 mE),CODCr去除率及二氯吡啶酸的去除率均＞99%;洗脱再生时,室温下用体积分数95%的乙醇洗脱,流速为2 BV/h.洗脱率接近100%.     

物化/厌氧水解/生物强化脱色处理印染废水

介绍了某印染废水工程实例,针对该工程废水的特点,设计采用物化沉淀—厌氧水解—生物接触氧化—曝气生物滤池组合工艺进行处理。在好氧生化阶段接种强化脱色菌,强化生物脱色效果。运行结果表明,进水CODCr为1 500 mg/L、BOD5为350 mg/L、色度为1 000倍时,处理出水水质为CODCr≤80 mg/L、BOD5≤25 mg/L、色度≤40倍,优于《纺织染整工业水污染物排放标准》(GB 4287—1992)的一级排放标准要求。     

水解-接触氧化-生物炭工艺处理印染废水

采用水解-接触氧化-气浮-混凝沉淀-生物炭工艺处理以分散染料为主的印染废水，设计规模为960m^3/d，进水水质为：pH8．01，CODCr992mg／L，BOD5 251mg／L,SS298mg／L，色度400倍；经本工艺处理后，总排放口出水水质为：pH7．64，CODCr72mg／L，BOD5 19mg／L,SS61mg／L，色度16倍。     

黄酒酿制米浆废水的处理

针对高浓度酿酒米浆废水CODCr达30000mg/L、BOD5达18000mg/L、废水易生化的特点,采用酸化、UASB厌氧、SBR好氧联合处理工艺,处理后出水CODCr≤1000mg/L、BOD5≤600mg/L,符合排入当地城市污水处理厂的要求。     

水解酸化-二级接触氧化处理DOP废水

采用水解酸化 二级接触氧化工艺处理新区某DOP工厂废水.设计总处理水量120 m3/d,其中原浓废水20 m3/d,出水回流100 m3/d;设计进水水质:高浓度有机废水CODCr9 000 mg/L,pH 5～9,混合后废水CODCr1 500 mg/L,pH 6～8;设计出水水质:CODCr≤130 mg/L,pH 6～9.实际进水CODCr 987.60 mg/L,平均出水CODCr为105.37 mg/L;平均CODCr去除率为89.33%,处理后出水可达标排放.     

高浓度树脂生产废水处理工艺的设计

对某公司树脂生产废水的处理进行了试验研究,该废水的CODCr接近150 000 mg/L.经过小试确定了该废水的处理方案.首先采用物化预处理即两级催化氧化法降解废水中的有毒有害物质,提高废水的可生化性,接着用微电解法初步降低废水的CODCr,最后用UASB A/0进一步降低其CODCr,使废水CODCr小于500 mg/L达标排放.     

混凝-高效复合微生物处理煤气洗涤废水

对焦油,CODCr,BOD5,酚的质量浓度分别为1295mg/L,1642mg/L,581mg/L,260mg/L的煤气洗涤废水,采用先破乳、后混凝再经复合微生物曝气处理的方法,处理后出水的焦油,CODCr,BOD5,酚的质量浓度分别为6.2~9.2mg/L,61.4~104.4mg/L,26~41mg/L,0.64~0.83mg/L。试验中阳离子高分子破乳剂用量为15mg/L,阳离子高分子混凝剂用量为8mg/L,曝气生物处理用的菌种为人工复合驯化。     

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。