超声波萃取-高效液相色谱法测定总悬浮颗粒物中的多环芳烃

研究了一种用中流量采样器采样,超声波萃取,硅镁型吸附剂柱层析预分离.高效液谱测定总悬浮颗粒物的实验方法,在16分内可分高萘、蒽、芘、苯并(a)芘、苯并(ghi)苝等15种多环芳烃.已在大气环境的实际监测中得到应用.     

Adsorption of zinc on manganite(γ-MnOOH): particle concentration effect and adsorption reversibility

The adsorption and desorption processes of Zn(Ⅱ) on τ-MnOOH as a function of particle concentrations (Cp) were studied. An obvious Cp effect was observed in this adsorption system. The degree of adsorption hysteresis increased greatly with the increasing of Cp, indicating that the extent of the real metastable-equilibrium states deviating from the ideal equilibrium state was enhanced with the increasing of Cp. The Cp-reversibility relationship confirmed the metastable-equilibrium adsorption (MEA) inequality (Pan, 1998a), which was the core formulation of the MEA theory. Because the MEA inequality was based on the basic hypothesis of MEA theory that adsorption densitιy ι is not a state variable, the Cp-reversibility relationship gave indirect evidence to the basic hypothesis of MEA theory.     

福建省森林固定CO2价值评估

借鉴国内外研究成果,引入“市场逼近系数”,构造森林固定CO2效益经济结构模型,评估福建省森林固定CO2价值,为福建省森林资源的科学管理和资产评估提供了借鉴和参考。     

气相色谱法测定汽油作业环境中MTBE含量

建立了汽油作业场所空气中MTBE的气相色谱测定方法。空气中的MTBE用注射器采集，直接进样，经大口径毛细管柱分离，氢焰离子化检测器检测，以保留时间定性，峰面积定量，并考察了MTBE与甲醇、正己烷的分离效果。     

德兴地区超大型铜、金矿床成矿控制因素及其模拟实验

在深入研究德兴地区超大型铜、金矿成矿地质背景的基础上 ,从构造地球化学方面着重研究德兴地区超大型铜、金矿床成矿的控制因素 ,并进行构造控矿模拟实验。研究结果表明 ,德兴地区超大型铜、金矿床的形成除因其处于特殊的构造位置 ,具有特殊的地质背景及成矿环境外 ,还与多种地质作用、多种控矿因素耦合作用及地质构造长期发展演化使成矿物质多次叠加富集密切相关     

Occurrence and congeners specific of poiychlorinated biphenyls in agricultural soils from Southern Jiangsu, China

A total of 198 agricultural soil samples were collected from Zhangjiagang and Changshu in Southern Jiangsu for analysis of 13 polychlorinated biphenyls (PCBs) in order to assess the levels of pollution, sources, area distribution, and potential risk for the environment. All methods were rigorously tested and an adequate quality control was ensured. Only one site had no PCBs residues, and the highest total PCBs concentration in the surface soils was 32.83 ng/g. The average concentration in all the soil samples was 4.13 ng/g, signaling low-level pollution. Tetra-, penta-, and hexa-chlorinated biphenyls were dominant species in soil samples, accounting for more than 75% ofΣPCBs in the soil samples. PCB118 was the most abundant congener in all the samples. The PCB118 was about 20% ofΣPCBs. The soil organic matter content showed only a weak correlation with the levels of all PCB congeners, in which a better correlation was noted for the more volatile lighter PCB congeners than for the heavier homologues. To a certain extent, the sources and land use seemed to influence the levels of PCBs.     

海滨浴场的卫生细菌学调查及保护对策

从卫生细菌学角度，选用总大量菌群作为指标，对多年的海浴场监测结果进行了综合分析，以期了解近年来秦皇岛海滨浴场的水质变化情况，并提出了可行的保护对策。     

楔横轧模具的铣削加工及其机床设计

根据楔横轧模具孔型及其加工成形的特点,对楔横轧模具大面积大螺距楔形提出了一种简单高效的铣削加工方法,并设计制造了楔横轧轧辊模具孔型加工专用机床——SDM机床。新设计的SDM机床投资小,可以加工直径为φ620 mm～φ1000mm的轧辊模具,加工导程最大可达469 mm,加工周期短,成本低,且大大降低了工人劳动强度。     

武汉东湖湖水的藻类生长潜力(AGP)测试

在东湖湖水样品中添加排入东湖的主要污水或营养物(氮和磷)进行藻类测试,观察它们对斜生橱藻(Scenedesmus obliquus)的生长促进作用.生长反应与添加的污水浓度成正比,其SC_(20)(促进20％增长的浓度)为0.5—4％.单独添加氮或磷,在高浓度情况下也很少促进藻类生长,但共同添加时大多有促进作用.东湖为一严重富营养型湖泊,为了控制其富营养化进程,污水截流应是首先要采取的一项措施.     

甘肃寒山金矿区黄钾铁矾的形成机制及其地质意义

在分析寒山金矿区原生矿物和氧化矿物组合的基础上，通过对黄钾铁钒的热力学计算分析得出：在常温条件下，黄铁矿要形成黄钾铁钒，所需的氧逸度较低，但需要有一个较高的碱性、富钾、富Fe2＋以及富水的环境，这一条件暗示了围岩为富铁的基性火山岩在湿润的气候条件下有利于形成黄钾铁钒，同时也表明寒山金矿区氧化带的形成过程中，其气侯环境不是现在的沙漠干旱气候，而是湿润动植物繁盛的大陆性气候。结合区域地质特征，可以得出寒山金矿的氧化带可能形成于早侏罗世-中侏罗世。