铁,镍,锰的火焰塞曼原子吸收分光光度分析

运用火焰塞曼原子吸收对铁、镍、锰等谱线较复杂的元素进行了测定，在实验的基础上，提出了仪器最佳工作条件，并对该分析方法的灵敏度、精密度及准确度进行了探讨。     

硒对镰刀菌毒素毒性抑制作用的初步研究

用动物试验确定硒(Ⅳ)对镰刀菌中一种尖孢镰刀菌(Fusarium oxysporum)毒素的毒性有抑制作用。用人胚软骨细胞实验也初步观察到相似的结果,对该菌属代谢物之一镰刀菌酸与硒的化学作用进行了初步探讨。     

Observation-based sources evolution of non-methane hydrocarbons (NMHCs) in a megacity of China

Both concentrations and emissions of many air pollutants have been decreasing due to implement of control measures in China, in contrast to the fact that an increase in emissions of non-methane hydrocarbons (NMHCs) has been reported. This study employed seven years continuous NMHCs measurements and the related activities data of Shanghai, a megacity in China, to explore evolution of emissions and effectiveness of air pollution control measures. The mixing ratio of NMHCs showed no statistical interannual changes, of which their compositions exhibited marked changes. This resulted in a decreasing trend of ozone formation potential by 3.8%/year (p < 0.05, the same below), which should be beneficial to ozone pollution mitigation as its production in Shanghai is in the NMHCs-limited regime. Observed alkanes, aromatics and acetylene changed by +3.7%/year, -5.9%/year and -7.4%/year, respectively, and alkenes showed no apparent trend. NMHCs sources were apportioned by a positive matrix factorization model. Accordingly, vehicular emissions (-5.9%/year) and petrochemical industry emissions (-7.1%/year) decreased significantly, but the decrease slowed down; significant reduction in solvent usage (-9.0%/year) appeared after 2010; however, emissions of natural gas (+12.6%/year) and fuel evaporation (with an increasing fraction) became more important. The inconsistency between observations and inventories was found in interannual trend and speciation as well as source contributions, emphasizing the need for further validation in NMHCs emission inventory. Our study confirms the effectiveness of measures targeting mobile and centralized emissions from industrial sources and reveals a need focusing on fugitive emissions, which provided new insights into future air policies in polluted region.     

汞的形态分析进展

汞的测定方法由总汞测定深入到汞的形态分析，综述近几年来汞的形态分析方法的发展，包括原子光谱法、气相色谱法、液相色谱法，毛细管电泳法和电化学分析法。     

环境保险在中国的可行性探讨

在解决环境问题的过程中，包含着诸多的商机，环境保险就是其中一例。环境保险属于责任保险的一种，介绍了环境保险在西方发达国家的发展与实践，并结合我国保险业的现状，得出在我国施行环境保险，既是我国保险业自身发展的需要，也是企业规避风险的需要。     

入世后环保要求与企业行为的风险、策略分析

入世后，随着未来市场对产品的环保要求越来越高，消费者希望产品能满足某种使用效用的同时，还希望其环境效益最大化。针对变化多端的市场，企业不得不同时面对各种挑战、机遇和风险并作出相应的战略决策。本文通过分析环保要求对企业行为的作用机理及为确保入世后企业的健康发展提出了相应的对策。     

电火花堆焊工艺在冲压模具维修上的应用

介绍了电火花堆焊设备及工艺在冲压模具维修中的使用情况,为大型冲压模具成形面拉伤修复探索出了一种新方法。     

不同方式污水排海对海水水质的影响

污水排海主要有岸边直排和深海排放两种方式，本文以深圳下沙海域为例，采用数值模拟的方法，对污水岸边排放和在500m及1000m不同距离的深海排放进行了计算和分析，结果表明，在一般水动力条件下，污水排放距岸越远，对海水水质的影响越水，岸边直排以近岸海域影响最大。     

白洋淀底泥腐殖质的表征及光化学反应

白洋淀底泥腐殖质的表征及光化学反应郁志勇王文华彭安（中国科学院生态环境研究中心，环境水化学国家重点实验室，北京１０００８５）关键词腐殖质；单线态氧（１Ｏ２）；自由基（ＲＯＯ·、ＨＯ·）；光化学反应腐殖质是动植物经过长期的物理、化学、生物作用而形成的...     

北京市区及郊区大气中的汞沉降的估算

以Throughfall法估算出北京市1996年大气汞干沉降率为528．88μg.m^2.a^-1，以沉降速率估算出1998年北京市汞的年沉降量为687．5μg.m^-2.a^-1。