政策法规

《电镀污染物排放标准》8月1日实施《电镀污染物排放标准》将于8月1日实施。自实施之日起,电镀企业水和大气污染物排放控制按该标准的规定执行,不再执行《污水综合排放标准》(GB8978-1996)和《大气污染物综合排放标准》(GB16297-1996)中的相关规定。该标准为首次发布。     

电镀废水中有机污染物产排污特征与排放控制要求

结合电镀生产工艺流程和电镀废水末端治理工艺流程,分析了电镀废水中有机污染物的产排污节点、种类和特征。按照我国现行国家和地方水污染物排放标准对电镀废水有机污染物的排放限值,指出电镀企业应对废水中有机污染物进行二级生物处理或深度处理,才能达到标准要求。结合实际调研,分析了电镀废水有机污染物达标难点,并提出源头预防与末端组合工艺相结合的污染防治思路。     

海峡两岸电镀废水排放标准及处理技术的比较

海峡两岸电镀产业的产品、原料、生产方式,企业规模、数量、发展状态,以及社会环境、自然环境等不同,故电镀废水排放标准也有所差异。对大陆GB 212900–2008《电镀污染物排放标准》中的表2、表3与台湾《放流水标准》进行了对比,分析了两岸在重金属离子、化学需氧量(COD)、氰化物、氨氮等污染物排放指标中的差异以及在重金属污染物处理和COD达标处理技术上的不同。本文可为了解大陆和台湾地区电镀废水污染物排放标准之间的差异提供参考。     

电镀企业竣工环保验收监测及后续监管中相关问题分析

结合电镀污染物排放及治理的相关规范,针对电镀企业竣工环保验收监测中相关问题进行了总结与分析,主要从基准排放量标准的确定、标准中对废气排放量的规定、一类污染物标准评价等方面进行了论述,并结合污染物中的相关监测技术规范,从电镀废水监管、废气监管以及电镀污泥监管等方面探讨了电镀企业后续监管中相关问题,从中提出了自己的看法与建议。     

执行电镀废水排放标准有效措施及工程案例

在钱塘江流域执行《电镀污染物排放标准》(GB21900-2008)中表3规定排放限值的新形势下,沿江电镀企业面临严峻的环保压力。系统分析了电镀废水排放超标的技术原因,从电镀废水处理中的络合剂、化学反应极限和自动控制程度等方面,阐述了达到标准中表3规定排放限值的技术措施,提出了废水处理升级改造的思路。并介绍了长三角地区几个电镀企业废水处理整体改造的成功案例。     

电镀废水提标改造技术实例

随着电镀废水排放对环境造成的影响日益严重以及《电镀污染物排放标准》的颁发和实施,广东省电镀企业的污水排水均需执行表3标准,在电镀行业刮起一场"环保风暴"。原有电镀企业的废水处理工程已不能满足处理要求,技术改造势在必行。通过对惠州市某电镀企业废水治理工程提标改造的实证分析,介绍一种可操作性强、成本低、去除率高、运行稳定的电镀废水提标改造技术。     

螯合沉淀技术在电镀工业园废水处理中的应用实践

文章介绍了一个采用螯合沉淀技术处理电镀工业园废水处理的典型案例,通过对废水中污染物去除效果的分析,说明该工艺处理电镀废水效果好,使种类复杂的电镀工业废水处理达到了《电镀污染物排放标准》（GB21900-2008）表2排放标准,运行稳定,操作简单,适宜处理电镀工业园的生产废水。     

电镀行业污染物排放限值水平分析

本文对比分析了国内外电镀行业污染物的排放限值，说明《电镀行业污染物排放标准》（征求意见稿）中污染物控制指标与排放限值的确定依据。     

低污染的镀硬铬工艺及清洗方法

根据GB21900-2008<电镀污染物排放标准>,对电镀污水排放提出了要求,电镀工厂将难以用大量的净水把电镀废水稀释再达标排放.介绍了低污染镀硬铬的生产工艺,主要包括采用稀土低铬镀铬工艺、减少带出量、多槽逆流漂洗回收及改善水洗方法等.     

电镀行业现行环保条例与清洁生产

汇总并解读了2008年颁布的<循环经济促进法>和<电镀污染物排放标准>等涉及电镀业的有关环保法律法规.指出企业应以清洁生产为目标,抓住机遇,改进工艺,加大环保投资,化危机为商机,在积极开展清洁生产的同时,享受政府的优惠政策.     

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.     

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.     

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。     

Inorganic/organic nanocomposite coatings: The next step in coating performance

Inorganic/organic hybrid materials have considerable promise and are beginning to become a major area of research for many coating usages, including abrasion and corrosion resistance. Our primary approach is to prepare the inorganic phase in situ within the film formation process of the organic phase. The inorganic phase is introduced via sol-gel chemistry into a thermosetting organic phase. By this method, the size, periodicity, spatial positioning, and density of the inorganic phase can be controlled. An important aspect of the inorganic/organic hybrid materials is the coupling agent. The initial task of the coupling agent is to provide uniform mixing of the oligomeric organic phase with the sol-gel precursors, which are otherwise immiscible. UV-curable inorganic/organic hybrid systems have the advantages of a rapid cure and the ability to be used on heat sensitive substrates such as molded plastics. Also, it is possible to have better control of the growth of the inorganic phase using UV curing. It is our ultimate goal to completely separate the curing of inorganic and organic phases to gain complete control over the morphology, and hence optimization of “all” the coating properties. Thus far, it has been found that concomitant UV curing of the inorganic and organic phases using titanium sol-gel precursors afforded nanocomposite coatings which completely block the substrate from UV light while maintaining a transparent to visible light. Also, it has been found that the morphology of the inorganic phase is highly dependent on the concentration and reactivity of the coupling agent. Presented at the 82nd Annual Meeting of the Federation of Societies for Coatings Technology, October 27–29, 2004, in Chicago, IL.