上海丰远环保科技有限公司

<正>新产品介绍——废水处理系列产品除磷混凝剂除磷除镍混凝剂FY新型高效除磷剂FY除磷除镍铜混凝剂FY脱色剂FY脱色除磷剂COD去除剂除氨氮、COD、BOD、重金属离子等☆功效:除镍、除磷、除浊(SS)、去除水中COD、BOD及重金属离子等功能显著,特别是处理含镍废水效果更佳。◆除磷混凝剂对含磷废水磷的去除达99.9以上;◆除磷除镍混凝剂对电镀废水中的磷和镍能一步去除;     

饮用水除砷技术研究新进展

重点介绍了近年来各种除砷新技术的研究进展,内容包括:强化混凝、吸附、离子交换、膜法、预氧化除砷技术。评价了各除砷技术的优缺点与适用范围,并认为饮用水除砷技术的发展将呈现出以下特点:As(Ⅲ)和As(V)同步去除技术的开发;易于取得或制备、生物化学稳定性高、吸附容量大、选择性高、再生能力强的新型除砷吸附剂的开发;多种除砷技术联合,多重去除机理协同的除砷流程的开发;低能耗、低成本除砷技术的开发;生物除砷技术的开发。     

全卤制碱中除硝方法及冷冻法除硝的实际应用

对钡法除硝、钙法除硝、冷冻法除硝及膜法除硝进行了比较,总结了冷冻法除硝在湖北沙隆达股份有限公司的应用问题.     

化学方法在除藻方面的应用

文章介绍了近年来化学方法在除藻方面的应用成果及现状。化学除藻可分为除藻剂除藻、混凝沉淀除藻和化学氧化剂除藻,指出化学除藻与其他除藻方法的独特之处。分析了化学方法在除藻技术领域的应用情况,为实现其工业化生产和应用提供参考。     

化学除磷工艺研究进展

化学除磷是抑制水体富营养化以及从废水中回收磷资源的有效手段。本文阐述了铁盐、铝盐和石灰3种常见化学除磷药剂的除磷机理及其影响因素,如pH值、投加量、投药点以及经济性分析;概述了前置化学辅助除磷、协同化学辅助除磷、后置化学辅助除磷以及旁路化学辅助除磷4种化学辅助生物除磷工艺的特点,最后介绍了吸附法和结晶法除磷新兴工艺,阐明了磷资源回收是未来化学除磷工艺的方向发展。     

氧化钙去除含磷废水中磷的反应条件研究

探究4种除磷剂在含磷废水中的除磷效果和经济性,并以氧化钙为除磷剂,探讨p H、温度、反应时间对除磷效果的影响。结果表明：随反应p H升高,氧化钙除磷率增大,但pH在5.05以上时,趋于稳定;初始p H越高,相应的除磷效果越好;除磷率随着温度升高不断提高;含磷废水中磷浓度越高,所需除磷反应时间越长,相应的除磷率越高。     

含钒液体除硅过程的研究

目前石煤提钒行业对溶液除硅均采用静置沉淀法,即在弱碱性条件下,将含硅钒液长时间静置,硅离子自然凝聚,再过滤除去二氧化硅凝胶.此方法缺点是除硅率低,静置时间长,微细的二氧化硅凝胶过滤困难,造成钒产品中硅含量超标.针对目前工业现状,采用絮凝法除硅,探讨了除硅过程的机理,研究了除硅剂种类、除硅剂用量、液体pH、温度、静置时间对除硅效果的影响.结果表明:在弱碱性条件下,添加除硅剂A对含钒液体除硅过程具有良好的效果,除硅率可达90%以上,且除硅过程不会造成溶液中钒的沉淀损失.     

硅胶载体除氟剂的性能研究

以层析硅胶为载体,以活性氧化铝和活性氧化镁为吸附质制备出了两种载体型除氟剂。在相似条件下,前人研究活化沸石除氟剂的动态除氟容量为0.98 mg/g,本实验制备的两种除氟剂的动态除氟容量分别为1.00 mg/g和1.72 mg/g,明显高于文献值。对实验室制备的硅胶/活性氧化铝和硅胶/活性氧化镁除氟剂的除氟性能进行了测试,测试分析了高氟水溶液中的常规离子SO42-、Cl-、Ca2 和Mg2 等对自制除氟剂的除氟容量的影响,表明这两种除氟剂有较好的抗干扰性。对比了高氟矿泉水的除氟数据,制备的除氟剂具有良好的除氟效果,为进一步制备除氟容量更高、抗干扰能力更强的除氟剂,提供了依据。     

脱氧剂在低压锅炉给水除氧中的实验研究

对低压锅炉在不同给水温度下,添加除氧剂进行化学除氧开展了实验研究,考察了除氧器温度、锅炉排烟温度、省煤器出水温度、氧含量、除氧成本等指标,结果表明,化学除氧可完全替代蒸汽热力除氧,可有效降低给水温度和氧含量,提高锅炉烟气热利用率,降低除氧成本45%以上,达到节能降耗的目的。     

氧化还原树脂除氧技术

氧化还原树脂除氧技术电子工业部第十二研究所（江苏常州，２１３０２６）霍银坤工业锅炉常用的除氧方法有热力除氧、真空除氧、树脂除氧和加药除氧，近几年来还有一些新型的解析除氧方法。热力除氧法是传统的除氧方法，技术成熟，但实际运行中因热负荷频繁变动，除氧效果...     

Many Drugs of Abuse May Be Acutely Transformed to Dopamine,Norepinephrine and Epinephrine In Vivo

It is well established that a wide range of drugs of abuse acutely boost the signaling of the sympathetic nervous system and the hypothalamic–pituitary–adrenal (HPA) axis, where norepinephrine and epinephrine are major output molecules. This stimulatory effect is accompanied by such symptoms as elevated heart rate and blood pressure, more rapid breathing, increased body temperature and sweating, and pupillary dilation, as well as the intoxicating or euphoric subjective properties of the drug. While many drugs of abuse are thought to achieve their intoxicating effects by modulating the monoaminergic neurotransmitter systems (i.e., serotonin, norepinephrine, dopamine) by binding to these receptors or otherwise affecting their synaptic signaling, this paper puts forth the hypothesis that many of these drugs are actually acutely converted to catecholamines (dopamine, norepinephrine, epinephrine) in vivo, in addition to transformation to their known metabolites. In this manner, a range of stimulants, opioids, and psychedelics (as well as alcohol) may partially achieve their intoxicating properties, as well as side effects, due to this putative transformation to catecholamines. If this hypothesis is correct, it would alter our understanding of the basic biosynthetic pathways for generating these important signaling molecules, while also modifying our view of the neural substrates underlying substance abuse and dependence, including psychological stress-induced relapse. Importantly, there is a direct way to test the overarching hypothesis: administer (either centrally or peripherally) stable isotope versions of these drugs to model organisms such as rodents (or even to humans) and then use liquid chromatography-mass spectrometry to determine if the labeled drug is converted to labeled catecholamines in brain, blood plasma, or urine samples.     

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.     

ICP-MS法测定地球化学样品中As、Cr、Ge、V等18种微量痕量元素的研究

建立了测定地球化学样品中包括As、Cr、Ge、V等18种微量、痕量元素的ICP-MS方法。地化试样用HF-HNO3混酸分解后,以1 1 HNO3溶解干渣。由于制样不使用盐酸,避免了Cl对As、Cr、Ge、V的质谱干扰。用国家一级地球化学标准物质GBW 07309制备溶液优化仪器工作参数,并用于校准。方法测定限(6s)为:0.007~6.4μg/g,精密度(RSD%,n=12)为:29%~9.4%,经过国家一级地球化学标准物质的分析验证,结果与标准值吻合。方法已应用于国土资源调查的试样分析。     

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.