吹扫捕集与色谱质谱联用测定水中挥发性有机物

采用吹扫描集与色谱质谱联用的对水中１９种挥发性有机物同时进行富集分离，定性和定量检测，结果表明，不同化合物的平均回收率大于９０％相对偏差小于５％，该方法的检测限约为０．１－０．４μ／Ｌ。实验证明吹扫描集与色谱质谱联用技术是快速测定水中挥发性有要峨的有效手段。     

催化动力学光度法测定痕量铈

根据前量铈在稀硫酸介质中对重铬酸根氧化ＥＤＴＡ而褪色的反应有催化作用，建立了测定痕量铈的新动力学光度法，测定范围为０￣２．４×１０＾－２μｇ／ｍＬ，检限限为５．２×１０＾－１０ｇ／ｍＬ，用于测定人发中的痕量铈，结果满意。     

绿色高强混凝土——硅灰混凝土

硅灰是冶金厂生产硅铁和工业硅过程中产生的废灰，硅灰混凝土为绿色混凝土，它不仅节约了水泥熟料，而且改善了环境，大大促进了混凝土和建筑工程的健康发展，混凝土中掺入硅灰可得到高强和超高强混凝土，用此混凝土浇制的结构物其安全度大大提高，经济效益显著，硅灰混凝土还可以有效抑制碱骨料反应，提高结构物的安全度和耐久性，延长使用寿命。     

Turnover mechanisms of organic conformation on turbidity in drinking water

The turbidity variation in artificial water and samples from a water plant was investigated in the presence of organics with different relative molecular mass. The results show that recessive turbidity existed when water chemical conditions were changing. The formation of turbidity depended on organic relative molecular mass and their conformations on particles. At higher pH and lower ionic strength, the organic chains with a more extended conformation resulted in rising turbidity of the suspension. At lower pH, the reconformation of organics took place due to charge neutralization by the proton, resulting in a decline in turbidity. The addition of NaCl and MgCl₂ at pH 7.00 also resulted in a decrease of turbidity in the suspension. It is believed that the occurrence of recessive turbidity has a significant influence on the stability of water supply quality.     

Hydrogen storage and distribution systems

Hydrogen storage and transportation or distribution is closely linked together. Hydrogen can be distributed continuously in pipelines or batch wise by ships, trucks, railway or airplanes. All batch transportation requires a storage system but also pipelines can be used as pressure storage system. Hydrogen exhibits the highest heating value per weight of all chemical fuels. Furthermore, hydrogen is regenerative and environment friendly. There are two reasons why hydrogen is not the major fuel of toady’s energy consumption: First of all, hydrogen is just an energy carrier. And, although it is the most abundant element in the universe, it has to be produced, since on earth it only occurs in the form of water. This implies that we have to pay for this energy, which results in a difficult economic task, because since the industrialization we are used to consuming energy for free. The second difficulty with hydrogen as an energy carrier is the low critical temperature of 33 K, i.e. hydrogen is a gas at room temperature. For mobile and in many cases also for stationary applications the volumetric and gravimetric density of hydrogen in a storage system is crucial. Hydrogen can be stored by six different methods and phenomena: high pressure gas cylinders (up to 800 bar), liquid hydrogen in cryogenic tanks (at 21 K), adsorbed hydrogen on materials with a large specific surface area (at T < 100 K), absorbed on interstitial sites in a host metal (at ambient pressure and temperature), chemically bond in covalent and ionic compounds (at ambient pressure), oxidation of reactive metals e.g. Li, Na, Mg, Al, Zn with water. These metals easily react with water to the corresponding hydroxide and liberate the hydrogen from the water. Finally, the metal hydroxides can be thermally reduced to the metals in a solar furnace.     

世界青年在行动--第四届世界水环境论坛侧记

题记：对于大多数人来说。2006年3月16—22日在墨西哥城banamex会议中心举办的第四眉世界水论坛传递出来的大都是主体论坛、部长级会议的声音；不多的人会知道。在热火朝天的“成人”论坛的边缘还行走着一群朝气蓬勃的青年，他们在每天主论坛之前就开始在青年论坛上传递自己对于世界水资源问题的认识和见解；而更少人知道，每日在主论坛之后，他们还在为联合世界各地青年、采取实际行动、应对水资源问题而努力。我，很幸运地成为了这股青年力量中的一分子。亲身经历了这令人振奋的七天……[编者按]     

论地震台站的管理

本文主要介绍了地震系统中最前沿的单位——地震台站,重点阐述了北京市地震局延庆地震台的成绩、管理思路和经验,对全国地震台站的工作具有一定的参考学习意义。     

氮气中二氧化硫气体浓度测量不确定度的评定

采用紫外荧光法测定氮气中的二氧化硫气体浓度的测量不确定度.充分考虑重复测量的重现性、测量仪器的计量性能局限性、标定仪器所用的标准气体等因素对测量的影响,计算氮气中的二氧化硫气体浓度测量合成标准不确定度为0.4.     

危险废物分类、识别、监控一体化管理技术研究概述

研究运用环境统计信息系统(ESIS),建立黑龙江省典型危险废物的数据库系统,使其具备系统、完善的查询与追踪功能;提出危险废物易燃性、腐蚀性、反应性和毒性方面定量化的定义,建立基于危险废物成分分析基础上的分类体系,使危险废物的处理与处置具有良好的可操作性;开发危险废物在线识别技术,促进对危险废物进行监管及预警的时效性和有效性;运用GPS、GSM、GPRS、GIS、计算机网络通信和数据处理等监控技术,实施对危险废物运输车辆的远程在线监控;提出危险废物收集、贮存、分离、运输、处理、处置、回收利用过程中的管理法律、法规,促进危险废物全过程管理的有效实现.     

内蒙古癌死亡率与土壤环境中化学元素的关系

利用中国癌死亡率与土壤环境中化学元素的相关性研究成果，研究了内蒙古癌死亡率与土壤环境中化学元素：As、Cd、Co、Cu、Hg、Mn、Ni、Pb、Se、V、Li、Na、K、Rb、Cs、Mg、Ca、Sr、Ba、B、Al、Ga、In、Tl、Sc、Y、La、Ce、Pr、Nd、Tb、Dy、Ho、Er、Tm、Yb、Lu、Th、U、Sn、Ti、Zr、Hf、Sb、Bi、Ta、Te、Mo、W、Br、I、Fe等52个元素含量的关系。