巯基羊毛对Zn^2＋,Cu^2＋,Pb^2＋等重金属离子的吸附特征

利用巯基羊毛对重金属离子Ｚｎ＾２＋,Ｃｕ＾２＋Ｐｂ＾２＋的水溶液进行了吸附研究。探讨了巯基羊毛对这些金属离子的吸附性能,结果表明,最佳吸附酸度为Ｃｕ＾２＋：ｐＨ＝４．０～７．０,Ｐｂ＾２＋：ｐＨ＝４．２～６．０,Ｚｎ＾２＋：ｐＨ＝４．５～７．３饱和吸附量为Ｃｕ＾２＋：１．１９ｍｇ／ｇ,Ｐｂ＾２＋：２．８２ｍｇ／ｇ,Ｚｎ＾２＋：１．２２ｍｇ／ｇ并对该三种金属离子的分离,富集,回收和巯基羊毛的再生条件     

天然高分子吸附剂研究：Ⅸ.羧甲基壳聚糖树脂对Zn（Ⅱ）Pb（Ⅱ）的吸附 …

研究了羧甲基化的交联壳聚糖树脂对ＺｎＰｂ离子的吸附性能。结果表明，该树脂对Ｐｂ＾２＋比对Ｚｎ＾２＋具有更强的吸附选择性，其对Ｐｂ＾２＋和Ｚｎ６２＋的吸附容量分别为６６０．９７和１７２．００ｍｇ．ｇ＾－１，其ＫＰｂ＾２＋／Ｚｎ＾２＋＝３．８４；其吸附的最佳ｐＨ值分别为５．４和４．０．在低浓度时，ＡＣ－ＣＴＳ对两种离子的吸附率均可达１００％。     

磷石膏两步复分解副产物制饲料磷酸氢钙

碳酸钙废渣与湿法磷酸反应，制备饲料级磷酸氢钙工艺研究和结果，试验得到的优化工艺条件：Ｋ＋ 、Ｃａ２＋ 盐混合脱氟至ｐＨ≥２．０ 时，Ｐ２Ｏ５ ／Ｆ≥３２０，中和ｐＨ＝ ５．８～６．０。     

pH值与两性树脂吸着容量的相关性

本文研究了外界环境对两性离子交换树脂吸附行为的影响，发现强碱弱酸两性离子交换树脂Ｃａ＾２＋的吸着容量Ｑ与ｐＨ存在指数函数关系，其相关方程ｌｏｇＱ＝０．３７ｐＨ－１．１８５；强酸弱碱两性离子交换树脂对ＳＯ＾２－４的吸着容量Ｑ与ｐＨ存在线性相关性，其方程为Ｑ＝０．０３ｐＨ＋０．０７。     

天然高分子吸附剂研究

研究了羧甲基化的交联壳聚糖树脂（ＡＣ－ＣＴＳ）对Ｚｎ（Ⅱ）Ｐｂ（Ⅱ）离子的吸附性能。结果表明，该树脂对Ｐｂ２＋比对Ｚｎ２＋具有更强的吸附选择性，其对Ｐｂ２＋和Ｚｎ２＋的吸附容量分别为６６０．９７和１７２．００ｍｇ·ｇ－１；其ＫＰｂ２＋／Ｚｎ２＋＝３．８４；其吸附的最佳ｐＨ值分别为５．４和４．０；在低浓度时，ＡＣ－ＣＴＳ对两种离子的吸附率均可达１００％。     

氯化钾电镀锌铁合金工艺参数对镀层含铁量的影响

研究了氯化物体系中电沉积锌铁合金的工艺，并讨论了各种工艺参数对镀层中含铁量的影响。实验结果表明，影响镀层中含铁量的主要因素为金属浓度比、电解液ｐＨ值及阴极电流密度。用正交试验优选出获取含铁０．２％合金镀层的工艺条件为：「Ｆｅ＾２＋」／「Ｆｅ＾２＋＋Ｚｎ＾２＋」＝０．１２２，ｐＨ＝３．０，ＤＫ＝２．１Ａ／ｄｍ＾２。     

气固两相流量测量模型的研究：气力输送流动特性的实验探讨

通过对稀相气力输送粉料压损比与混和比比例关系式（ΔＰｔ／ΔＰｇ＝１＋Ｋｍ）中比例系数Ｋ的实验研究，获得了关于Ｋ的经验公式：Ｋ＝１／λｇ（２．５２７９／Ｆｒ＾１．５１８３）。建立了基于此比例关系式－速度法粉料流量测量模型｛ｍｓ＝ｋｃπ／２Ｄ＾３（ΔＰｔ－λｇＬ／ＤρｇＶｇ＾２／２）λｇ＝０．３１６４／Ｒｅ＾０．２５（Ｒｅ〉２３２０）κｃ：校正因子实验验证相应的粉料流量检测系统的测量精度为５％，满足工     

高浓度CO2气中H2S的脱除

本文从理论上概述了高浓度ＣＯ２气脱除Ｈ２Ｓ的可能性。经探索预选和利用Ｌ１６（４＾５），Ｌ８（２＾７）两个正交试验，初选出ＴＦ脱硫液吸该酸性气体的最大影响因素ｐＨ值和重要催化剂Ｆｅ的浓度。进而测定其定量关系，得出ｐＨ值和Ｆｅ浓度同时影响Ｈ２Ｓ脱除率ηＨ２Ｓ和ＣＯ２吸收率ηｃｏ２的数学关联式： ηＨ２Ｓ＝２．２６（ｐＨ）＾１．７３（Ｆｅ）＾０．０３２     

铜离子浮选动力学的单泡吸附模型

本文就离子浮选提出了单泡吸附模型，并据此从理论上导出了适应于吸附动力学控制的方程式：（Ｃ_０－Ｃｔ）＋ａ／２×１ｎ（Ｃ_０／Ｃ_ｔ）＝Ａｔ然后以ＮａＬＳ浮选Ｃｕ￣（２＋）离子的实验验证了上式，结果颇为一致。通过上式计算了离子浮选的传质系数ｋ、吸附与解吸系数ｋ_１、ｋ_２。研究了气流量与ｐＨ对传质系数的影响，发现在ｐＨ＝５．０时传质系数为最大，并讨论其产生的原因，最后提出了相应的吸附机理。     

KTa0.55Nb0.45O3薄膜的介电和铁电及热释电性能研究

在ＢＴ／Ｐｔ／Ｔｉ／ＳｉＯ２／Ｓｉ衬底上用溶胶－凝胶法制备了ＫＴａ０．５５Ｎｂ０．４５Ｏ３（ＫＴＮ）薄膜,０．５μｍＫＴＮ－０．０８μｍＢＴ薄膜在２５℃,１．０ｋＨｚ时,其εｒ＝１１１４,ｔａｎδ＝２．５％;１２℃时,其中Ｐｒ＝２．１μＣ／ｃｍ＾２,Ｐｓ＝４．２μｃ／ｃｍ＾２,Ｅｃ＝５．８ｋＶ／ｃｍ,０．５μｍ厚ＫＴＮ膜的Ｃｕｒｉｅ温度为３５℃;１．０ＫＨｚ时,ＫＴＮ膜的εｒ＝１４１２,估算ＫＴＮ     

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。