XDA-1大孔树脂吸附处理含苯甲酸废水

采用大孔树脂对含苯甲酸废水进行吸附及脱附处理。实验结果表明:在废水流量为5.0 BV/h的条件下,树脂最佳吸附工艺条件为出水体积50.0 BV,此条件下出水无色透明,苯甲酸小于5 mg/L;在脱附液流量为0.5 BV/h的条件下,树脂最佳脱附工艺条件为脱附液体积1.5 BV,此条件下脱附液中苯甲酸钠大于30 g/L。在最佳吸附—脱附工艺条件下,连续进行10次动态吸附—脱附实验,吸附出水中苯甲酸稳定小于5 mg/L,苯甲酸去除率大于99.5%,说明大孔树脂的吸附—脱附性能稳定。     

树脂吸附法处理高浓度邻甲酚工业废水研究

对邻甲酚含量1.992 g/L,COD值高达15 568.4 mg/L,pH约为2的含酚废水进行处理,确定N3520树脂为最佳吸附剂,最佳处理条件为:温度为室温;流速4 BV/h,最大处理量为26 BV,经吸附法处理后,吸附流出液中邻甲酚含量<0.5 mg/L,邻甲酚去除率>99%,COD去除率为97.6%。树脂采用5%NaOH-60%乙醇作脱附剂,最佳脱附条件为:温度40℃,流速1.0 BV/h,用量2 BV。经脱附处理可回收邻甲酚。     

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-Fenton氧化法处理高浓度焦化废水

采用树脂吸附-Fenton试剂氧化组合工艺对某焦化企业产生的高浓度焦化废水进行处理.实验确定的最佳工艺条件:(1)树脂吸附--双柱串联吸附,吸附流量1 BV/h,处理水量20 BV;(2)树脂脱附--脱附剂2 BVNaOH 1 BV H2O,流量0.5 BV/h,温度为70℃;(3)Fenton试剂氧化--温度40℃,反应时间2 h,按体积比1%投加H2O2,投加Fe2 为4.03 g/L.实验结果表明:在上述最佳工艺条件下对该废水进行处理,酚类污染物去除率接近100%,COD去除率为74.82%,废水的COD/BOD5由0.11提高到0.19.     

超高交联树脂吸附处理2,4-D含酚废水的研究

采取超高交联树脂NDA-150吸附处理2,4-二氯苯氧乙酸含酚生产废水,取得了良好的效果。通过静态吸附比较和动态吸附-脱附研究,确定了最佳工艺参数。原废水呈深红褐色,总酚质量浓度>16000mg/L,树脂吸附后出水无色透明,总酚质量浓度<0.5mg/L,达到国家排放标准。原废水酸化和高浓脱附液酸化处理,能回收大量的2,4-二氯酚和2,4-二氯苯氧乙酸。该工艺简单,操作方便,是一项具有环境效益和经济效益,值得推广的技术。     

焦化废水深度处理回用研究

焦化厂蒸氨废水经生化处理后，再用高温炉渣过滤，然后调节废水PH为6．5，用南开牌H－103大孔吸附树脂室温下以4倍体积／h流速进行吸附处理，原废水含酚5．0mg/L,CODCr280mg/L，处理后出水酚含量≤0.01mg/L,CODCr≤30mgL，悬浮物小于50mg/L，硬度达到稳定要求，控制泄漏点为0．01mg/L，树脂工作吸酚量为16mg/mL，处理体积为3000倍（体积），树脂脱附再生。     

弱酸性交换树脂处理含铅废水动态吸附行为研究

采用110弱酸性树脂对废铅酸蓄电池在回收过程中产生的破碎分选废水(浊环水)进行了脱铅深度处理。通过柱动态试验,考察了树脂形态、温度、流速等因素对吸附及脱附的影响。结果表明,优化的吸附条件为:树脂Na型、流速20 BV/h、温度30℃,吸附过程符合Yoon-Nelson模型,流出液前2000BV Pb2+的质量浓度小于1mg/L,树脂饱和吸附量为592.6mg/g;优化的脱附条件:脱附剂HNO3(浓度1.5mol/L)、流速10BV/h、温度20～30℃,脱附液中Pb2+的质量浓度达45.72g/L。     

硫辛酸生产废水的处理及资源化研究

通过动态吸附试验,综合考虑吸附量、脱附效果确定资源化硫辛酸生产废水中硫辛酸的最佳树脂是NG-16大孔吸附树脂,最佳的工艺条件为:pH 5～5.5,室温,吸附流量3 BV·h-1,双柱串联处理量25 BV·批-1,在30℃下,用3 BV甲醇+2BV水脱附,流量为1 BV·h-1,高浓度脱附液调pH至7.2～7.8,蒸馏回收硫辛酸和甲醇,低浓度脱附液套用,每吨废水可回收纯度80%左右的硫辛酸1.1 kg.处理后废水中硫辛酸的质量浓度从1 300～1 500mg·L-1降为0,总硫的质量浓度从400～450mg·L-1降为0.05mg·L-1,B/C从0.30提高到0.65,为硫辛酸废水的后续处理提供了良好的条件.     

对氨基苯甲酸生产废水的树脂吸附预处理

采用超高交联吸附树脂处理芳香两性化合物对氨基苯甲酸(PABA)生产废水,通过静态吸附、动态吸附-脱附实验,研究确定了最佳的吸附-脱附工艺条件。结果表明,在常温和2 BV/h的吸附流量条件下,原废水不用调节pH值,直接经JX-101树脂吸附处理20 BV后,CODC r可从6 000 mg/L左右降至700 mg/L左右,CODC r去除率达88%以上,PABA的吸附去除率达99%以上。采用1 BV 8%氨水溶液 1 BV 4%氨水溶液 2 BV水作脱附剂,在313 K脱附温度和1 BV/h脱附流量的条件下,树脂脱附性能良好。该工艺简单,运行稳定,操作简便,可回收有用物质,有望实现工业化。     

絮凝沉淀-吸附两步法预处理松节油加工废水

采用絮凝沉淀-吸附两步法预处理松节油加工废水。筛选了絮凝剂和树脂类吸附材料,研究了吸附温度、时间、流量对吸附过程的影响,脱附剂及脱附液体积对解吸过程的影响。结果表明:常温下,pH值为7时,PAM为最佳的絮凝剂,废水中CODCr的去除率达36.1%;温度为30℃,pH值为7时,吸附流量为1 BV/h,聚氨酯为最佳的吸附材料,废水中CODCr的去除率可达35.7%;室温下依次以3 BV质量分数为6%的H2SO4溶液和2BV的水作为脱附剂,脱附流量为1 BV/h,脱附液体积为5 BV,脱附率可以达到92.3%;聚氨酯经过5次吸附-脱附后仍保持良好的吸附性能。     

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。