欧盟已正式批准四溴双酚A阻燃剂的使用

据有关媒体报道，欧盟最近正式批准了四溴双酚A应用于全球几乎70％的电器和电子设备的电路板和塑料部件中。四溴双酚A作为SAYTEX（R）CP-2000系列阻燃剂由美国雅保公司生产销售。经过多年危险性试验验证，欧盟成员发言人认为，四溴双酚A不仅对人体无害，而且用在印制电路板中也不会污染环境。     

双酚A在环境中迁移转化的研究进展

分析了内分泌干扰物对人和动物的影响,介绍了其在化学工业中的应用,阐述了双酚A的基本性质、用途、危害和环境存在性等,从吸附、光降解和生物降解等几方面综述了双酚A在环境中迁移转化的研究进展。     

水环境中常见的雌激素之一--双酚A

对双酚A的主要危害、测定方法及在环境水体中的生物降解特性进行了介绍，指出了开展水源水和饮用水中双酚A研究的重要性。     

基于碳纳米管/分子印迹聚合物修饰电极对双酚A的测定研究

在碳纳米管修饰的玻碳电极表面滴涂双酚A分子印迹聚合物,制备了分子印迹聚合物/碳纳米管修饰电极。优化了碳纳米管浓度、分子印迹聚合物浓度、富集时间、pH等对传感器的测定条件,结果表明,当碳纳米管浓度为0.3 mg/mL,分子印迹聚合物浓度为0.5 mg/mL,富集时间为5 min,pH为8.0,分子印迹修饰电极对双酚A具有最大的电化学响应。在最优的实验条件下,采用差分脉冲伏安法对双酚A进行测定,峰电流与双酚A浓度在0.1~100.0μM范围内呈现良好的线性关系,检测限为0.5μM(S/N=3)。该分子印迹修饰电极的电化学传感器成功应用于嘉兴南湖水、自来水、纯净水中双酚A的含量测定。     

探讨分子印迹电化学传感器对双酚A的检测

利用分子印迹技术(MIT),以双酚A(BPA)为模板分子,邻氨基苯硫酚(ATP)为功能单体,通过自组装和电聚合方法制备双酚A分子印迹聚合膜电化学传感器,采用循环伏安法和交流阻抗法进行表征,并用于双酚A的检测,该研究结果为电化学聚合法制备分子印迹聚合膜,根据功能单体与模板分子的相互作用正确选择功能单体提供了理论基础。     

三维电场协同TiO2光催化降解水中双酚A的研究

采用溶胶-凝胶法制备TiO2/Ti膜电极,设计了三维电极电助光催化降解反应装置,并将其用于降解水中的双酚A.结果表明,三维电场协同TiO2光催化氧化技术对双酚A的降解效果较好,反应120 min后降解率可达100%;在本试验条件下,最佳阳极偏电压为8 V;当溶液的电导率较小时,增大电导率有利于对双酚A的降解,但当电导率较大时,对双酚A的降解率反而随电导率的增大而逐渐减小;电助光催化降解双酚A的反应符合表观一级动力学方程.     

全球信息1则

世界聚碳酸酯市场概况1．世界聚碳酸酯（PC）树脂用作工程热塑塑料的聚碳酸酯树脂绝大多数均以双酚A为基础，与碳酸二苯酯进行酯化而得。聚碳酸酯树脂采用界面聚合工艺，由双酚A的碱性水溶液与碳酰氯反应。因三甲基环己酮双酚聚碳酸酯（TMC-BP-PC）与双酚A聚碳酸酯进行混和，可能向市场开发和引进一系列新的聚碳酸酯。一些新的工艺，使聚碳酸酯生产不必仅仅依靠有毒的碳酸氯（光气）．1989年，聚碳酸酯树脂生产商欧洲4家，美国3家，日本5家。全世界聚碳酸酯产量，1／2来自美国的GEPlastics公司，1／3来自德国的Bayer公司，约1／6来自…     

水体中四溴双酚-A分析与去除方法的研究进展

四溴双酚-A(TBBPA)是一种广泛使用的溴代阻燃剂,其大量生产和使用导致了严重的环境污染。TBBPA具有较低的水溶性,化学性质比较稳定,它可远距离传输到各种环境介质中,在生物体内产生各种慢性及累积性的毒性。介绍了近年来国内外水体中的TBBPA研究进展,对TBBPA前处理(萃取和分离)、检测分析和去除方法进行了总结,并对今后的研究方向进行了讨论和展望。     

太空杯要少用

<正>聚碳酸酯是生产硬塑料水瓶(太空杯)时普遍采用的化学材料,该材料中有一种主要物质为双酚A,简称BPA。BPA固然给人们带来方便,但美国和加拿大的一些专家指出,它会对     

HCPE-TBA环氧树脂超薄钢结构防火涂料的研制

采用双酚A(BPA)在酸性介质中,以乙醇为溶剂,与NaBr、KBrO3在过氧化氢存在的条件下发生溴代反应,生成四溴双酚A(TBA);四溴双酚A(TBA)与环氧氯丙烷(EHC)在氢氧化钠溶液的作用下,通过逐步聚合得到TBA环氧树脂;以四溴双酚A环氧树脂和高氯化聚乙烯(HCPE)复合体系为成膜物质与聚磷酸铵、三聚氰胺、季戊四醇、三氧化二锑、氯化石腊、氢氧化铝、硼酸锌复配得到TBA型环氧树脂超薄膨胀型钢结构防火涂料A组分,以固化剂聚酰胺300#为B组分,A组分与B组分按适当比例复配得到常温固化的双组分TBA环氧树脂超薄膨胀型钢结构防火涂料.通过热失重(TG)分析,探讨了TBA环氧树脂超薄膨胀型钢结构防火涂料的防火阻燃机理.     

污泥制砖存在问题浅析

污泥制砖符合国家的环保政策,但在技术方面还待进一步创新和突破。为此分析了污泥制砖在技术方面、环保方面和社会大众认可方面存在问题及相应的改进措施。     

干旱区绿洲环境下的新疆小城镇建设投资

一、研究区域基本现状新疆地处欧亚大陆腹地,地貌轮廓表现为“三山夹两盆”,山地与平原的面积大致各占50%,镶嵌于戈壁沙漠的绿洲仅有7万平方公里。新疆土地面积166.49万平方公里,占全国总面积的六分之一。气候干旱,荒漠广布,是中国最大的干旱区,是亚洲干旱核心区,也是世界上著名的干旱区之一。水资源短缺,生态极度脆弱。新疆2004年底有1950万人,人均GDP已经超过了1000美元,城镇化进入了快速发展阶段,特别是小城镇的发展速度较快。但新疆特殊的干旱区绿洲环境,使得小城镇的发展存在许多问题。一是城镇规模小而散,基础设施配套差,城镇集散和…     

Levels of manganese in the urine of female farmers in non-polluted regions in Japan

Nearly 1500 urine samples were collected from female farmers in eight regions widely scattered in the islands of Japan in the winter of 1987-1988. The samples were analysed for manganese by wet ashing and flameless atomic absorption spectrophotometry under strict quality control. The values observed after adjustment for a specific gravity of 1.016 were distributed log-normally with a geometric mean of 0.65 microgram/l and a geometric standard deviation of 2.47. There was no effect of aging or any effect of smoking on the urinary manganese concentration. The inter-regional difference may be present but not yet conclusive. As no sex difference was observed in a previous study, it may be possible to deduce that the value may possibly stand for the "background" level of both men and women, either smoking or non-smoking, among the general Japanese population. The observed value is discussed in comparison with values reported in the literature.     

Typification of Fires in Buildings in Spain

Although the Dirección de General de Protección Civil (DGPC), an agency of the Spanish government, has been responsible for the collection of data and the statistical analysis of fires since 1985, it has not as yet issued any reports. It is true that a couple of studies have been made, but in neither case did they use a standardized methodology but relied simply on the heterogeneous information provided by the fire brigades which cooperated in the studies. At that time Spanish fire brigades did not have special units for professional fire investigation, nor was the information derived from standardized methodologies suited to research purposes. In addition, information was extremely scarce and basic, focussed only on the fire, the use of the building and personal data of the victims. In this context, the project for a Fire Investigation Unit in the Fire Brigade of Málaga (the sixth largest Spanish province in inhabitants) was set up. Although inspired in the methodologies used in the USA and in the UK, the aim was to create a customized methodology for the first scientific investigation of fires in Spain. Our research was conducted in 2007. Using the methodologies of the USA and the UK, our own methodological approach and the Spanish regulations, we drew up a questionnaire with 110 variables arranged into 6 modules. We studied 96 fires out of the 154 emergency fire calls received in 2007, having omitted some emergency calls for various reasons. Our results revealed that it was necessary to generalize the installation of fire extinguishers in residential buildings, to train the general public in the use of these devices, to promote the use of fire and smoke detectors in residential buildings, to encourage the inspection and control of old electric installations and to monitor the new installations, to generalize the implementation of emergency and evacuation plans and to design new systems and materials for the cabinets where hand-held extinguishers are stored.     

分光光度法测水中余氯

介绍了用双硫腙分光光度法测定水中余氯的新方法，阐述了其测定试验过程，根据试验结果显示，其结论符合国家标准，表明该方法可用于自来水等样品中余氯含量的测定，结果比较准确。     

Intersections of inequality in homeownership in Sweden

Abstract

Inequalities relating to ownership of housing have become a major issue de jour in many Western societies. This article examines how the distribution of homeownership in Sweden relates to two factors widely seen as significant to such inequalities, namely parental tenure status and place of birth. We use longitudinal registry data to examine the bearing of these two factors on individual-level tenure progression since the beginning of the 1990s for persons at different stages of their housing careers. We extend existing understandings of Swedish homeownership patterns by demonstrating that inequalities relating to place of birth and parental tenure intersect with one another in ways that substantially advantage certain subgroups while disadvantaging others, and by demonstrating that experiences of entry into homeownership have in recent years been changing in markedly different ways for these different subgroups. Overall, Swedish homeownership inequalities, far from dissipating, appear to be hardening along existing lines.     

莳花在城市绿化中的应用

目的:花化、香化、彩化已成为城市园林绿化的主要趋势,也是为满足人们对环境要求越来越高的一种心境。方法:选择采用莳花能表现出品种繁多,色彩艳丽等不同的方式,从而能在很大程度上丰富了植物造景的层次感要求。结果:能使其达到美化环境、增添节日气氛、提高绿化品质等方面有着突出的作用。结论:莳花造景对城市的美化可达到立杆见影效果,从而提高城市的形象和品位。     

日本城市浅层地下空间利用的新成就

本文结合日本川崎市站前广场和神户市哈巴兰德地区的立体化再开发，分析介绍当前日本浅层地下空间开发利用的成就和特点。     

遗传算法在边坡稳定系数计算中的应用

边坡稳定性的关键问题是确定最危险滑动面(潜在最危险滑动面)和边坡的稳定系数。国内外一般是采用先假定边坡滑移模式,然后近似确定最危险滑动面,再求近似的边坡稳定系数的方法来分析边坡的稳定性,但假设的边坡滑移模式难以反映边坡滑移的实际状态。因此本文探索利用遗传算法搜索最危险滑动面,并得到最小稳定系数及对应的最危险滑动面曲线,取得了较好的效果。     

地质情况复杂地区高速公路隧道地质预报研究

针对地质情况复杂地区垫邻高速公路设计、施工中的具体问题，从地质预报的方法、原理方面入手，对地质情况复杂地区高速公路隧道施工中的地质超前预报工作进行了深入的研究，在分析归纳的基础上，提出合适的工作方法。