环境水质中酚类优先监测物的气相色谱法测定

以气相色谱法（ＧＣ）测定了环境水质中的重点酚类污染物。选择乙酸酐作衍生化试剂、甲苯为萃取剂,比较了不同的衍生ｐＨ条件,给出了氢火焰离子化检测器（ＦＩＤ）分离测定酚类污染物的精密度和检出限。方法简便实用,经５家实验室验证表明：适用于监测地表水和污水中的酚类物质。６种酚类优先监测物的检测限为０．６～７μｇ／Ｌ。     

EQUILIBRIUM IN ABSTRACT ECONOMICS WITH A NON－COMPACT INFINITE DIMENSIONAL STRATEGY SPACE

ＥＱＵＩＬＩＢＲＩＵＭＩＮＡＢＳＴＲＡＣＴＥＣＯＮＯＭＩＣＳＷＩＴＨＡＮＯＮ－ＣＯＭＰＡＣＴＩＮＦＩＮＩＴＥＤＩＭＥＮＳＩＯＮＡＬＳＴＲＡＴＥＧＹＳＰＡＣＥＤｉｎｇＸｉｅ－ｐｉｎｇ（丁协平）（ＳｉｃｈｕａｎＮｏｒｒｎａｌＵｎｉｖｅｒｓｉｔｙ,Ｃｈｅｎ...     

Investigation on Distribution and Risk Assessment of Volatile Organic Compounds in Surface Water,Sediment, and Soil in a Chemical Industrial Park and Adjacent Area

The occurrences, distributions, and risks of 55 target volatile organic compounds (VOCs) in water, sediment, sludge, and soil samples taken from a chemical industrial park and the adjacent area were investigated in this study. The Σ₅₅-VOCs concentrations in the water, sediment, sludge, and soil samples were 1.22–5449.21 μg L⁻¹, ND–52.20 ng g⁻¹, 21.53 ng g⁻¹, and ND–11.58 ng g⁻¹, respectively. The main products in this park are medicines, pesticides, and novel materials. As for the species of VOCs, aromatic hydrocarbons were the dominant VOCs in the soil samples, whereas halogenated aliphatic hydrocarbons were the dominant VOCs in the water samples. The VOCs concentrations in water samples collected at different locations varied by 1–3 orders of magnitude, and the average concentration in river water inside the park was obviously higher than that in river water outside the park. However, the risk quotients for most of the VOCs indicated a low risk to the relevant, sensitive aquatic organisms in the river water. The average VOCs concentration in soil from the park was slightly higher than that from the adjacent area. This result showed that the chemical industrial park had a limited impact on the surrounding soil, while the use of pesticides, incomplete combustion of coal and biomass, and automobile exhaust emissions are all potential sources of the VOCs in the environmental soil. The results of this study could be used to evaluate the effects of VOCs emitted from chemical production and transportation in the park on the surrounding environment.     

用正相高效液相色谱与气相色谱相结合分离多氯联苯和有机氯农药的方法研究

以电子捕获毛细管气相色谱为测定手段,探讨了用正相高效波相色谱分离多氯联苯和有机氯农药的可能性,并将该方法应用于海洋沉积物样品中有机氯农药的测定。     

非均匀下垫面上大气边界层研究进展

非均匀下垫面对大气边界层影响的研究是环境流体力学的重要课题之一。本文综述了这一领域的近期进展。      

南昌的绿化与环境保护

本文报导了南昌绿化树种的调查情况,论述了绿化与环境的相互关系,同时提出了今后绿化的建议,为南昌的绿化提供科学依据。     

生物矿化纳米结构材料与植物硅营养

本文在介绍了生物矿化纳米结构材料化学研究发展的基础上, 着重阐述以细胞膜和细胞壁为模板合成组装纳米尺寸SiO 2 的化学过程。这些生物矿化SiO 2 纳米结构材料研究不仅为近代纳米化学提供了有益启示, 同时也对阐明Si 营养提高植物抗环境胁迫机理有重要参考价值。     

环境气氛对微量热安瓿法测定细菌生长速率常数的干扰

采用微量热安瓿法测定细菌生长时,发现细菌的代谢产热曲线在第一指数生长期内出现了停留法没有报导过的显著分阶段现象,且在不同的阶段生长速率常数有很大差异,对药物抗菌性能的评估造成极大干扰.为了寻找此现象的可能原因,以具有代表性的兼性细菌大肠杆菌为例,设计了微量热安瓿法实验,考察了不同环境气氛下大肠杆菌的生长代谢产热;并模拟了停留法条件下细菌的生长环境,通过安瓿法测定了大肠杆菌的生长代谢产热,重新解析了这些条件下细菌的生长速率常数.结果表明环境气氛是造成此现象的主要可能因素,并为在不同环境气氛下采用微量热安瓿法准确评估细菌的生长速率提供了一个可参考的标准.     

A numerical study of turbulent line puffs via the renormalization group (RNG) k–ϵ model

The time evolution of a line puff, a turbulent non-buoyant element with significant momentum, is studied using the renormalization group (RNG) k–ϵ model. The numerical results show that the puff motion is characterized by a vortex pair flow; the computed flow details and scalar mixing characteristics can be described by self-similar relations beyond a dimensionless time of around 30. The added mass coefficient of the puff motion is found to be approximately unity. The predicted puff flow and mixing rate are substantially similar to those obtained from the standard k–ϵ model and are well supported by experimental data. The computed scalar field reveals significant secondary concentration peaks trailing behind in the wake of the puff. The present results suggest that the overall mixing rate of a puff is primarily determined by the large-scale motion and that streamline curvature probably plays a minor role. © 1998 John Wiley & Sons, Ltd.     

农药环境内分泌干扰物的免疫分析

综述了环境内分泌干扰物中农药抗原、抗体制备技术、放射免疫、酶免疫、荧光免疫、化学发光免疫技术和免疫传感器现状及其免疫分析研究发展趋势.