Measurements of Ozone Concentrations in Zagreb

Ozone concentrations were measured in Zagreb at four sites from May 1999 to April 2001 in order to categorize the air quality with respect to ozone. In the summer of 2000, the ozone measurements were also extended to four sites in the suburbs of Zagreb. Methods of active and passive sampling with nitrite ion as a reagent were used. In the northern part of the town ozone was analyzed by an automatic device. Automatic device measurements in the years 1999 and 2000 showed that hourly averages of ozone concentrations did not exceed the Croatian recommended value of the 98th percentile (180 g m^–3). Over the two-year period, 24-h averages occasionally exceed 110 g m^–3 in city center and in the northern part of the town. Regardless of these isolated examples, ozone was well within acceptable concentrations. Ozone concentrations measured in summer 2000 were higher in the suburbs of Zagreb than in the city. The 98th percentile values higher than 110 g m^–3 were recorded at three sites.     

Multipoint source method in air pollution modelling of cold start emission

The paper presents a new method of air pollution modelling on a micro scale. For estimation of concentration of car exhaust pollutants, each car is treated as an instantaneous moving emission source. This approach enables us to model time and spatial changes of emission, especially during cold and cool start of an engine. These stages of engine work are a source of significant pollution concentration in urban areas. In this work, two models are proposed: one for the estimation of emission after cold start of the engine and another for the prediction of pollutant concentration. The first model (defined for individual exhaust gas pollutants) enables us to calculate the emission as a function of time after the cold or cool start, ambient temperature and average speed of motion. This model uses the HBEFA database. The second mathematical model is developed in order to calculate the pollutant dispersion and concentrations. The finite volume method is applied to discretise the set of partial differential equations describing wind flow and pollutant dispersion in the domain considered. Models presented in this paper can be called short-term models on a small spatial scale. The results of numerical simulation of pollutant emission and dispersion are also presented.     

CHLORINATED HYDROCARBON (HCB, DDTs AND PCBs LEVELS IN CETACEANS STRANDED ALONG THE ITALIAN COASTS: AN OVERVIEW

Concentrations of HCB, DDTs and PCBs in the tissues andorgans of cetaceans ( Stenella coeruleoalba, Tursiops truncatus, Balaenoptera physalus, Steno bredanensis}, Grampus griseus} and Globicephala melaena) strandedalong the Italian coasts in the period 1987–1993 are reported. The values are compared between speciesand between specimens of the samespecies. Chlorinated hydrocarbon (CH) levels were found toincrease in relation to the quantity andtype of lipids in each tissue and organ. Differences inaccumulation encountered in the differentspecies are principally due to different feeding habitats.Remarkable differences found between malesand females of each species confirm that during gestation andlactation, females undergo disintoxication by passing much of their total burden of CHs to their young.     

第三产业风机、冷却塔噪声污染防治浅谈

随着社会的发展，尤其是第三产业的不断兴起，其噪声污染问题日益突出。本文从对噪声扰民案件入手、分析，发现风机和冷却塔噪声污染最为严重。针对主要污染源，从技术方面提出了解决噪声污染的方法，为环境管理，治理提供科学依据。     

汽车尾气污染及其净化处理技术

本文详细阐述了汽车尾气的有害成份及其对人类健康的危害。为此 ,应该采取净化处理措施 ,减少或者消除有害气体的产生 ,为大气环境洁净而创造条件。     

Ecoprofit-Styria-prepare Thirteen pollution prevention case studies in the Styrian industry

The paper focuses upon the organization of a federal state-funded pollution prevention project in the Styrian industry. The project includes 13 companies from the textile, pulp and paper, machine building, wood working and printed circuit board manufacturing industries, covering most of the sectors and sizes in the Styrian industry. It started in January 1994 and will last for one year. It will demonstrate the possibilities of pollution prevention and the need for further research work. This project will make use of the methods and tools that were refined in the Austrian Prepare project. As a first step, a systematic balance of all the inputs and outputs of a company is made, after which the weak points and inefficiencies of material and energy use are identified and the options for improvements, both economical and ecological, are defined. Consequently, modifications in products and production lead to a situation with less waste and emissions. The preliminary lessons from these projects are presented: as a rule, the utilities (consumption of process materials and water, cleaning, energy, preparatory and finishing steps) are treated as black boxes and usually represent a considerable optimization potential. In these areas especially there is usually a lack of information and coordination as well as a need for a systematic and comprehensive approach. Leadership in the company and creative consultants are needed for starting lasting successful pollution prevention projects.     

电晕法处理易挥发性有机物(VOCs)的实验研究

叙述了电晕法处理易挥发性有机物（ＶＯＣｓ）的实验研究。从实验中得出ＶＯＣｓ去除率与电场强度和空管速度的关系。对比了有填料与无填料时线 管式反应器处理ＶＯＣｓ的效果     

基于GIS的汉江水污染信息管理系统的结构设计

介绍了基于GIS开发的汉江流域水污染信息管理系统的结构设计 ,本系统可实现对汉江全流域的基础地理信息、用水信息、污染信息的输入、输出、查询 ,进而利用水文水质预测模型作出评价、预测 ,为有效控制汉江流域水污染 ,促进全流域的社会经济可持续发展提供一定的决策支持。     

水蚀风蚀交错带小流域生态环境综合治理模式研究

水蚀风蚀交错带是黄土高原侵蚀最严重的地区和黄河下游河床粗泥沙的主要来源区，其生态环境脆弱、治理难度大，加之晋陕蒙能源基地的大规模开发，也带来了新的环境问题。鉴于治黄和煤田开发及生态环境整治的紧迫需要，以水蚀风蚀交错带六道沟小流域为试区，分析研究了该区水蚀风蚀时空分布规律及脆弱生态环境特征，提出以防治水蚀和风蚀为中心，以提高生态经济效益和持续发展为目标，以基本农田优化结构和高效利用及植被建设为重点，建立具有防蚀固沙兼高效生态经济功能的大农业复合生态系统综合治理模式，取得了良好的社会与经济效益。     

大顶子山航电枢纽工程建库后上游水质总量控制研究

松花江大顶子山枢纽工程建设后,库区内水体流线及扩散规律的变化将影响库区内水质,受沿江排污影响,其规划目标的水环境容量将发生改变,因此对建库后上游水质总量控制进行研究很有意义.