地铁车站门禁系统的应用技术与安全管理

广州地铁1、2号线车站首次采用门禁系统,建立了地铁车站设备管理区的现代安保管理设施,提高了车站内部管理的工作效率,加强了对车站设备管理区各类用房的监管力度.本文主要介绍广州地铁车站门禁系统的应用技术与安全管理.     

钢铁行业碳排放量核算方法的实证性研究

介绍了碳排放量核算的基本原理与通用方法。以某钢铁公司焦化厂CO2排放量计算为实例,对比分析了物料衡算法和经验计算法的合理性和准确性。研究发现,对于钢铁企业来说,采用IPCC方法进行CO2排放量的计算是可行的。     

PCDD/F formation during thermal desorption of chlorobenzene contaminated soil

Environmental Science and Pollution Research - Unintentional formation of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/F) is observed and investigated during the thermal desorption in...     

Perfluoroalkyl substances in the Lingang hybrid constructed wetland,Tianjin, China: occurrence,distribution characteristics,and ecological risks

Environmental Science and Pollution Research - In this study, the occurrence, spatial distribution, sources, and ecological risks of perfluoroalkyl substances (PFASs) in the surface waters of the...     

二氧化碳回收技术进展

CO2的过量排放对全球的气候变暖有着不可推卸的责任,同时CO2又是一种重要的碳资源,对它的回收和利用将具有很大的经济效益和社会效益。CO2回收的方法主要是膜吸收法、变压吸附法、化学吸收法和低温分离法,特别是离子液体对CO2的吸收,为CO2的减排提供了良好的手段。     

Bt肠毒素基因与plcR基因的相关性及肠毒素对小鼠的急性毒性

用PCR方法检测溶血肠毒素BL、肠毒素T和肠毒素S三种肠毒素基因(hblA、becT、entS)及毒素调控基因plcR在30株苏云金芽胞杆菌株(Bt)中的分布.结果表明,含有hblA基因、entS基因、becT基因及plcR基因片段的Bt菌株分别占66.7%、70%、70%和73.3%.其中,含有plcR基因的菌株都至少含有一种肠毒素基因,不含肠毒素基因的菌株也未检测到plcR基因,说明plcR基因与肠毒素基因有着密切的关系.用3个Bt菌株WB9、HD2和HD9(都含有hblA、becT、entS和plcR基因片段,HD2和HD9经RPLA与TECRA肠毒素检测试剂盒检测具有高滴度)对小白鼠进行口服急性毒性试验.结果表明,所有3种供试菌株的发酵上清液对小白鼠行为和健康没有明显影响,对内部器官(心、肝、肺等)也没有产生病理现象.图5表3参14     

Examining the technology acceptance for dismantling of waste printed circuit boards in light of recycling and environmental concerns

The dismantling of printed circuit board assemblies (PCBAs) and the recovery of their useful materials can lead to serious environmental impacts mainly due to their complicated physical structure and the variety of toxic elements contained in their material composition. So far, less attention has been paid to their responsible recycling compared to that of bare printed circuit boards. Combined with other materials recovery process, proper dismantling of PCBAs is beneficial to conserve scarce resources, reuse the components, and eliminate or safely dispose of hazardous materials. In analyzing the generation, resources potential and hazardous risk of scrap PCBAs, technologies used for the dismantling of waste PCBAs have been widely investigated and reviewed from the aspects of both industrial application and laboratory-scale studies. In addition, the feasibility of PCBA dismantling has been discussed, the determinants of which, including the heating conditions and mechanical properties have been identified. Moreover, this paper evaluates the environmental consequences caused by the dismantling of PCBAs.     

连云港市工业循环经济发展趋势评价

依据工业循环经济发展的基本原则,构建了工业发展水平、资源减量利用、资源再利用和污染物减量排放4类共18项指标在内的工业循环经济发展评价指标体系。运用层次分析法(AHP),测算权重,对连云港市2006~2010年的工业循环经济发展状况进行了评价。结果表明,连云港市整体的工业循环经济发展水平呈先增长,再平稳,后增长的趋势,其中资源减量利用水平和污染物的减量排放水平呈逐年上升的良好势头,但资源再利用水平不高,有逐年下降的发展趋势。     

Cu、Cd污染对土壤脲酶活性的影响研究

随着重金属污染的越来越重,重金属对土壤环境的危害引起人们广泛的关注,土壤酶作为土壤生态系统中生化反应的催化剂,对各种土壤代谢过程起驱动作用.为研究单因素重金属Cu、Cd对于土壤脲酶活性的影响,以至于对环境保护和环境评价工作提供意见.本文采用靛酚蓝比色法测定脲酶活性,以氨氮浓度表征土壤脲酶活性.实验结果表明,随着Cu2＋、Cd2＋浓度的增加,土壤脲酶活性显著降低,即重金属对土壤脲酶具有抑制作用.