水路危险品运输风险定量分析与评价探讨

围绕危险化学品水路运输风险，参照国外危险货物运输的定量分析方法以及水路危险货物运输现状，在固定场所定量风险评价的基础上，分析运输过程的安全性，初步探讨了对于危险化学品水路运输进行风险定量分析的基本步骤，风险的两种表述方式和定量评价标准，将危险控制在可接受范围内。     

西北干旱地区地下水放射性环境污染及防治研究--以内蒙古东乌旗地区为例

以东乌旗地区为例，研究了西北地区地下水放射性环境问题。结果表明：东乌旗地区地下水存在严重的放射性污染，花岗岩裂隙水、砂岩承压水和潜水达标率分别为8％、14％和45％；放射性铀、氡污染主要原因为铀矿化扩散成因、淋漓花岗岩成因和蒸发浓缩成因；处理本地区地下水铀污染的合理方法为阴离子交换树脂吸附法；地下水中氡有两面性，一方面饮用水中氡含量超标，给人体带来危害，只需将其露天放置一星期或加温煮沸即可达到饮用水标准；另一方面氡浴又有利于人体的健康。     

新一代天气雷达系统电磁辐射环境影响分析一例

对我国第一部新一代多普勒气候雷达的电磁辐射进行了实地监测,结合所在位置地势,高差等因素,评价了其辐射对环境产生的影响,为分析其搬迁后可能对环境产生的环境影响提供参考.     

三江平原挠力河流域50年代以来湿地退缩过程及驱动力分析

以小尺度的三江平原挠力河流域作为研究区域,分析了自1954年以来湿地的空间和时间退缩过程及其驱动力,重建了自1954年以来的土地利用/土地覆被变化过程。结果表明,湿地面积由1954年的1149878hm₂下降到2000年的277691.25hm₂,由占总面积的45.85%下降到11.07%,仅仅是原来面积的1/4不到;而耕地面积由206003.5hm₂增加到1440260.25hm₂,由占总面积的8.21%增加到57.43%。同时指出,人类农垦活动是挠力河流域湿地面积退缩的主要驱动因子。     

异波折板高效水解酸化废水的处理技术

提出了异波折板高效水解酸化废水处理技术.通过水力学措施实现水解酸化系统内湍流涡旋以加速传质,并改善系统内pH值条件以增强微生物活性.试验结果表明,对浓度范围在450～900mg/L之间的溶解性COD的去除率为40%±4%.     

北京市防震减灾示范区系统工程--预报、通讯、指挥、现场、整合部分

新组建的北京市地震局迫切需要建成一个比较完善的地震业务工作体系,首都圈防震减灾示范区系统工程建设为北京市地震工作实现"三大工作体系"带来了契机.本文重点介绍北京市防震减灾示范区系统工程中的预报、通讯、指挥、现场部分,为了提高效率、节省资金,项目组还在硬件、信息和资源共享、网络平台、虚拟专网、各系统间的联接、可持续发展等方面进行了整合.     

基于过氧化物的消毒技术研究进展

对环境友好消毒技术需求的增长,推动了过氧化物消毒技术的快速发展,并已被广泛应用于反化学和生物恐怖袭击、化生灾害处置、环境污染治理等领域.在综述了过氧化物消毒剂α亲核取代/氧化消毒反应机制研究进展的基础上,介绍了以过氧化物为活性组分的水基消毒溶液、消毒泡沫、消毒乳液、消毒凝胶、消毒气雾、自消毒材料、纳米材料催化消毒技术等典型消毒体系.针对现有过氧化物消毒技术消毒效率偏低、对个别毒剂消毒效果不理想的缺点,建议在过氧化物消毒技术研究中,加强消毒反应机制、多相体系界面相互作用研究,开发新型催化剂、多功能表面活性剂、自消毒材料和消毒剂缓蚀技术,以实现真正的绿色消毒.     

Incineration of kitchen waste with high nitrogen in vortexing fluidized-bed incinerator and its NO emission characteristics

Some municipal solid waste (MSW) can be used as the fuel. Combustion of MSW with high nitrogen content is successfully conducted in a lab-scale vortexing fluidized-bed incinerator (VFBI). Pigskin with 16.5 wt.% nitrogen content was used to simulate the high nitrogen content kitchen waste, and silica sand was used as the bed material. The effects of operating conditions, such as the bed temperature, freeboard temperature, excess oxygen ratio, and static bed height on the CO and NO concentrations at the exit of combustor and cyclone were investigated. The experimental results show that the freeboard temperature is the most important factor for CO emission. The order of operating conditions impact on the NO emission is: (1) excess oxygen ratio; (2) bed temperature; (3) freeboard temperature; and (4) static bed height. Utilizing cyclone can significantly reduce the CO emission concentration when the CO concentration released from the freeboard is higher than 50 ppm. On the other hand, the cyclone has no significant effect on the NO emission. Despite having high nitrogen content, a low conversion from fuel-N to NO was attained. Compared with other types of combustors, VFBI reduces the CO and NO emission concentrations much better when burning MSW with high nitrogen content.     

Field experiment on biological contact oxidation process to treat polluted river water in the Dianchi Lake watershed

In this study two types of biological contact oxidation processes (BCOP), a step-feed (SBCOP) unit and an inter-recycle (IBCOP) unit, were designed to investigate the treatment of heavily polluted river water. The Daqing River, which is the largest pollutant contributor to the Dianchi Lake, one of the most eutrophic freshwater lakes in China, was taken for the case study. It was found that the SBCOP had higher adaptability and better performance in the reduction of COD, TN, and TP, which made it applicable for the treatment of polluted river water entering the Dianchi Lake. Nitrification rate was observed to be greatly affected by the influent temperature. During each season, the nitrification in the SBCOP was higher than that in the IBCOP. TN removal efficiency in the SBCOP was higher than that in the IBCOP during the winter and spring but poorer during the summer, possibly due to the inhibition of denitrification by higher dissolved oxygen level in the summer. Moreover, symbiotic algaebacteria growth may be conducive to the removal of pollutants.     

关于台州齐合天地金属有限公司的调查报告

台州齐合天地金属有限公司是全国资源再生的典型,他们不仅通过解决二次污染、技术升级、延伸产业链等,在发展循环经济方面做出了较大的成绩,而且也体现出对员工的人文关怀和回馈社会。但社会上仍存在不重视循环经济、废旧家电回收不规范、缺少远景规划和扶持力度不够、园区容量小、法律建设滞后等问题。要解决上述问题应加强循环经济相关法律、法规和政策的制定;开展宣传教育,营造良好氛围;搞好远景规划,提高扶持力度：加强行业协会作用。