饮用水中半挥发性有机物的GC／MS分析方法研究

介绍用毛细管气相色谱／质谱联用技术（ＧＣ／ＭＳ）对饮用水中半挥发性有机物的分析研究。饮用水经吸附富集、洗脱、浓缩后，用ＧＣ／ＭＳ测定，定性检出５０种半挥发性有机物，并对１９种主要的半挥发性有机污染物进行定量分析。     

树冠火蔓延模型和数值分析

本文计及森林多孔性燃烧床含水量和有机物含量，以及渗流气体的受热膨胀和质量源，建立了树冠火蔓延的一维物理模型，给出火蔓延的控制方程组和定解条件。通过数值分析，得到树冠火蔓延速度特性曲线，研究水份蒸发和有机物热解对树冠火蔓延速度的影响。     

铅碱性精炼废渣的资源化利用研究

介绍了铅碱性精炼废渣资源化利用工艺流程,探讨了该过程的工艺条件,讨论了有关影响因素.实验结果表明,经脱砷和脱铅后,Sb以锑精矿形式产出,可作为炼锑的原料;Pb以PbCl2或铅渣形式、Sn以锡渣形式产出,其品位较高,可作Pb或Sn冶金的原料;该工艺具有化工试剂消耗少、综合利用率高、污染小、易于实现大规模工业化等优点.     

对显热比变化规律的理论分析

对矿井风流热交换计算常用的参数之一即显热比的变化规律进行了理论分析。定量分析了显热比与通风时间 (巷道壁面温度 )、巷道壁面的湿度系数、风流的相对湿度等参数之间的关系。通风开始后 ,壁面温度随着暴露时间的增长而降低 ,显热比也随通风时间增长而降低。显热比随巷道壁面湿度系数的增加而下降 ;随着风流相对湿度的增加 ,显热比增加     

苏州地区典型输变电工程电磁环境影响分析

结合电磁场的生态效应、输变电电磁辐射的环境影响分析度评价等，分析了苏州地区典型输变电工程电磁辐射的污染状况。说明220kV输变电工程电磁辐射没有超过居民区工频电场以度磁感应强度标准。     

Eperimental study of photooxidation products of ethylbenzene

Smog chamber experiments were performed to investigate the composition of products formed from photooxidation of aromatic hydrocarbon ethylbenzene.Vacuum ultraviolet photoionization mass spectrometer and aerosol time-of-flight mass spectrometer were used to measure the products in the gas and particle phases in real-time.Experimental results demonstrated that ethylphenol,methylglyoxal,phenol,benzaldehyde,and 2-ethylfurane were the predominant photooxidation products in both the gas and particle phases.However,there were some differences between detected gas phase products and those of particle phase,for example,2-ethylfurane,ethylglyoxylie acid,nitroethylbenzene,3,4-dioxopentanal and ethyl-nitrophenol were only existing in the particle-phase.The possible reaction mechanisms leading to these products were also discussed and proposed.     

黄孢原毛平革菌(Phanerochaete chrysosporium)对Pb~(2+)的生物吸附特性及吸附机理

研究了非活性黄孢原毛平革菌(Phanerochaete chrysosporium)菌丝球对Pb2+的吸附特性及吸附机理.结果表明,菌丝球对Pb2+的吸附是单分子层吸附,Langmuir模型比Freundlich模型更适合于描述Pb2+在菌丝球上的吸附平衡.菌丝球吸附Pb2+的过程可以分为初始的快速吸附和随后的缓慢吸收2个阶段,并可以用二级动力学模型来描述.在菌丝球吸附Pb2+的过程中虽然存在粒内扩散,但它不是吸附过程的限速步骤.Pb2+的生物吸附过程是放热过程,其吸附活化能为-35.78kJ/mol,Pb2+的吸附热与化学反应热相近,为-44.45 kJ/mol.该生物吸附至少存在2种机理:菌体表面一些含氧基团对Pb2+的络合作用;Pb2+与细胞表面H+的离子交换.     

Changes of main secondary metabolites in leaves of Ginkgo biloba in response to ozone fumigation

To investigate the effect of elevated O3 on the accumulation of main secondary metabolites in leaves of Ginkgo biloba L., four-year-old trees were exposed in open-top chambers with ambient air and the air with twice ambient O3 concentration in Shenyang in 2006.Elevated O3 increased the concentrations of terpenes, but decreased the concentrations of phenolics in G.biloba leaves.The results showed that secondary compounds from G.biloba leaves responded to the elevated O3 exposure in a different way when compared to previous studies which showed elevated O3 increased the concentrations of phenolics but had no effect on the terpenes in leaves of other deciduous trees.Furthermore, reduced synthesis of phenolics may decrease the resistance of G.biloba to O3 and other environmental factors.On the other hand, the induced synthesis of terpenes may enhance the antioxidant abilities in G.biloba leaves at the end of O3 fumigation.     

三峡大学文思湖水污染评价

根据三峡大学文思湖近几年水质监测资料,以及对其水质状况、污染源进行调查研究的基础上,采用单因子指数评价、W值水质评价、富营养化评价、有机污染评价4种方法对文思湖进行了水体质量综合评价,以期为文思湖水环境的综合整治提供科学依据。     

长输管道塑料耦合堵漏夹具设计

长输管道特别是成品油管道（如汽油）泄漏抢修一直没有较好的解决办法。虽然近几年来提出了金属夹具、材料缠绕、粘结剂等诸多方法,但是,每种方法都具有针对性而又有局限性,没有一种万全之策。鲁宁输油处近几年针对柴油管道的抢修研制了多种堵漏工具,如线性扣帽、引流叠帽等,这些堵漏工具在柴油管道泄漏抢修中发挥了较好的作用。采用此类工具堵漏后在安全的可燃气体范围内可直接焊接。但是,汽油管线泄漏抢修时采用的方法一直是堵漏后切换成柴油输送的情况下进行焊接（汽油输送状态下因受热、膨胀焊接危险性太大）,上述堵漏工具不能满足快速、便捷、安全、高效的要求,