酸性高浓度含氟废水处理技术

介绍了对某化工厂排放的酸性高浓度含氟废水进行处理的试验，采用石灰中和沉淀，氯化钙（或聚丙烯酰胺）二级絮凝沉淀，砂滤工艺进行处理，操作控制条件如下：pH为8－9，Ca^2 与F^-的摩尔比为3．0，聚丙烯酰胺投加量为2mg/L，沉淀时间为1h，处理工程运行后的验收监测结果表明，出水中的残氟浓度可以达到国家规定的一级排放标准，且系统运行稳定，工艺简便。     

现代化工分离技术在环境保护中的应用

介绍了高效导向筛板、新型高效填料、超临界流体萃取等现代化工分离技术及其在清洁生产和废物处理方面的应用。     

磁分离技术在我国废水处理中的研究进展

本文介绍了磁分离技术的基本原理、分离方法和设备，综述了该技术在某些特定废水处理中的应用现状。磁分离技术的实际应用具有分离效率高、分离速度快、选择性好、处理对象广、成本低廉、分离物系的粒度可达到很小，并且不受处理体系的温度、密度、酸碱度限制等优点，可以使某些采用传统分离方法较难或不能分离的物系得以顺利地分离，有较为广泛的应用前景。     

Chemical Composition and Acidity of Rain at the Gulf of Iskenderun,North-East Mediterranean

The purpose of the present work was to investigate the chemistry of rain in the Gulf of Iskenderun, North East Mediterranean, Turkey. The Gulf region has a large number of industries. Main industries existing in the region are iron and steel works, fertilizer plants, a cement plant, and several medium and mini size steel mills in addition to the international pipe line terminals. This study aims to apportion the local sources contributing to the overall pollution of the region. To this end a precipitation sampling program was started in January 2000, and over 48 precipitation samples were collected from each of 5 stations located at Iskenderun city center, Iskenderun industrial zone, Payas city center, the campus of Iskenderun Technical College and the campus of Mustafa Kemal University. Samples were analysed for pH, NO₃ ⁺, Cl^-. Ca, Al, Ba, Na, Cd, Co, Cr, Cu, Pb, Li, Mg, Mn, Ni, Zn, Fe, K. Concentrations of metal ions were determined by ICP-AES. NO₃ ^- ions and pH were determined by using NO₃ ^- selective electrode and pH meter, respectively.pH values of the collected samples at the industrial zone and at Payas city center, ranged between 5.02 and 7.38, respectively. NO₃ ^- and metal ions concentrations were highly variable. Concentrations of Ca and Fe ions were higher in the industrial zone and Payas city center. In the other three stations, concentrations of metal ions and NO₃ ^- ion were lower than that of industrial zone and the values of pH ranged between 6 and 7.4. The average pH values at Iskenderun Gulf showed that the precipitation was not acidic, because of the high concentration of Ca. The highest concentrations of Na and Cl ions were recorded in the University campus because the campus is located by the Mediterranean Sea.     

VARIATION FEATURES OF PRECIPITATION IN GUANGXI

VariationfeaturesofprecipitationinGuangxiUnevendistributionofprecipitationinareas　ByreasonofcomplexlandforminGuangxi,theprecipitationvariesindifferentregionsandisgenerallyabundantinthesouthandthenorth,littleinthemiddleregion;abundantintheeastandlittleinthewest;abundantinhillyareasandlittleintherivervalleysandbasins;abundantinwindwardslopesandlittleinleewardslopes;abundantincoastlandandlittleinis lands.Therearemainly 4 pluvialregionsand 2littlerainfallregions.The 4pluvialregionswithprecipitat…     

QUALITY OF HYDROMETEOROLOGICAL DATA IN COLD REGIONS1

ABSTRACT: Many users of hydrometeorological records are not aware of the number of inconsistencies and biases that occur in hydrometeorological records. Examples are presented illustrating how the exposures of sites for measurement of precipitation, wind, snow on the ground, and evaporation determine to a large extent how useful the records are for estimating areal conditions. For areas where precipitation in the form of snow produces a significant portion of the runoff, a smaller number of quality records may be more valuable for modeling than a much larger number of records of lower quality. Information is presented to show that the overall value of an operational hydrometeorological network is dependent upon how consistent and representative of average conditions the collected records are, especially for mountainous areas in cold regions.     

苯乙烯废水活性炭吸附装置的评价及改进研究

对抚顺石化公司化工塑料厂苯乙烯废水活性炭吸附装置的预处理设施、活性炭吸附及再生性能进行了评价，分析了出水水质超标的主要原因，用混凝沉淀－砂滤流程改进了原处理工艺，使出水水质得到了显著改善。     

利用造纸黑液回收电镀废液中铬的研究

本文报道了利用造纸黑液回收电镀废液中铬的方法，阐明了造纸黑液中所含有还原性物质与Ｃｒ＾６＋的反应机理；讨论了进行反应的最佳条件以及采用这一方法对废液的治理效果。     

酒精废水消化液预处理试验研究

高浓度酒精糟液经厌氧生物处理后排出的消化液COD浓度为4500—6000mg/L，SS浓度高这1500—2．600mg,／L，且由于微小沼气泡附着在厌氧污泥上，沉降性能很差，难以与消化液相分离，对后续处理十分不剁。本研兜采用预曝气．化学混凝沉淀组合工艺，对该消化液进行去除高浓度SS的顸处理试验，研究探讨了曝气时间、混凝剂种类和投加量对SS和COD去除效果的影响。试验结果表明，预曝气．化学混凝沉淀组合工艺对消化液SS的去除效果十分显著。当预曝气时间为6．0h，FeCl3投加量为100mg/L时，消化液的SS去除率75．4％，COD去除率24．3％，可为后续的好氧生物处理提供较为有利的水质和负荷条件。     

高层建筑物附近架空高压输电线路的走廊问题

采用镜像法实例计算了高层建筑物附近架空高压输电线路的工频电场和无线电干扰场强，并从电磁环评的角度对输电线路走廊的选择提出了一些建议。