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。     

火电厂石灰石湿法烟气脱硫废水处理方法

阐述了石灰石湿法烟气脱硫（FGD）废水的水质特征，介绍了国内外普遍应用的化学沉淀去除脱硫废水中重金属、悬浮物等物质的工艺特点及其不足，并着重介绍了最新发展的流化床法、沉淀一微滤法等FCD废水处理新型工艺。     

厄尔尼诺事件对黑龙江省春夏季降水的影响

利用实际监测资料,分析了40年中厄尔尼诺(Elnino)现象与黑龙江省降水距平之间的时空变化关系.结果发现,厄尔尼诺现象发生的当年及前一年,黑龙江省以春季4-6月份少雨干旱与夏秋季7,8月份(除厄尔尼诺年前一年的8月份外)多雨洪涝为主要气候特征;在厄尔尼诺年的下一年,春季4,6月份与秋季8,9月份一般具有少雨干旱的趋势.     

烟气脱硫喷淋塔的容积负荷与本体设计

提出了以喷淋塔的容积负荷——平均容积吸收率为控制指标的本体设计路线。在目前已有的设计、运行经验基础上，根据烟气的SO2进口浓度、要求的吸收效率等来确定喷淋塔容积。讨论了容积吸收率不同角度的定义，给出了采用容积吸收率进行喷淋塔本体设计的步骤。     

亚甲蓝湿式氧化影响因素研究

以湿式氧化技术对亚甲蓝水溶液进行处理,用水样COD去除率评价处理效果.考察了反应时间、温度、氧分压、搅拌速度、进水pH值以及进水浓度对处理效果的影响,并进行机理分析.实验确定的最佳操作工艺条件为:反应温度210℃、氧分压2.0 MPa、搅拌速度880 r/min、进水pH=11.30.在此条件下,COD为2 000mg/L的亚甲蓝水溶液,反应90min时COD去除率达93.2%.