处理工业废水的中试装置

每一个化学工程师或环境工程师都了解中试装置在新工艺的开发和应用中的历史作用及重要性。在70年代初期进行的许多废水处理中试研究为系统设计提供了设计基础,这些系统满足了美国环境保护局(EPA)颁布的最佳实用技术(BPT)排放限制。     

Past changes in the abundance of diatoms as inferred from a sediment core from Hebe Haven, Saikung, Hong Kong

１　Ｉｎｔｒｏｄｕｃｔｉｏｎ１－１　ＤｉａｔｏｍｓＤｉａｔｏｍｓ（ＣｌａｓｓＢａｃｉｌｌａｒｉｏｐｈｙｃｅａｅ）ａｒｅｃｏｍｍｏｎａｎｄｗｉｄｅｌｙｄｉｓｔｒｉｂｕｔｅｄｉｎｂｏｔｈｆｒｅｓｈａｎｄｍａｒｉｎｅｗａｔｅｒｓ（Ｍｏｓｅｒ，１９９６）．ＴｈｅｓｅｍｉｃｒｏｓｃｏｐｉｃｕｎｉｃｅｌｌｕｌａｒｐｌａｎｔｓｆｉｘａｍａｊｏｒｐｏｒｔｉｏｎｏｆｔｈｅＥａｒｔｈ○ｓｃａｒｂｏｎ，ｇｅｎｅｒａｔｅｏｘｙｇｅｎ，ａｎｄｓｕｐｐｌｙｆｏｏｄｔｏａｎｉｍａｌｓｗｈｉｃｈｆｅｅｄｏｎｔｈｅｍ（Ｄｉｘｉｔ…     

Assessing the impact of air pollution sources in Hong Kong, a densely populated city

As the simple dispersion model tested is not sufficiently accurate to predict the SO2 concentration in complex terrain commonly encountered amongst high rise buildings in Hong Kong, and the lack of comprehensive local wind data at most sites prevents the use of more advanced dispersion model to assess the impact of major air pollutant sources, a receptor model approach is adopted for the apportionment of air pollution sources in Hong Kong. The preliminary results obtained are presented and discussed.     

城市大气污染水平变化的近似预测法

<正> 在对城市大气污染水平做长期预测时,通常没有有关污染源的数据资料供精确的计算,这就决定了一般都使用最简单的近似计算法。如果知道排放物总量变化的数据,预测污染物的平均浓度被认定是可行的,这一点也是有条件的。表现为新污染源离市中心的距离变远及污染源高度的增加等城市建设发展趋势,对城市大气状况有巨大的影响。以致,人们在进行近似预测时在某种程度上也予以考虑。     

Influence of form and quantity of chromium on the development and survival of two silkworm (Bombyx mori L.) races

IntroductionThediversityamonginsectlifehistoriesmakesitdifficulttocomparetheeffectofachemical(orfactor)onthedevelopmentoftheseorganisms.Thediversityofbioassaysrangesfromthepopulationleveltothemolecularlevelandfrominvivotoinvitrostudies(Zhang ,1 993 ) .Differentparametershavebeenusedtostudyinsectgrowthinhibitionofmanychemicals.Forexample ,LD50 (thedosewhichcauses50 %mortalityinapopulation)iscommonlyusedtodeterminetheactivityofchemicalsthathaveacutetoxicity .Itcannotbeusedtothosechemicalsthatd…     

Effects of some heavy metals on cell suspension cultures of Catharanthus roseus

ＥｆｆｅｃｔｓｏｆｓｏｍｅｈｅａｖｙｍｅｔａｌｓｏｎｃｅｌｌｓｕｓｐｅｎｓｉｏｎｃｕｌｔｕｒｅｓｏｆＣａｔｈａｒａｎｔｈｕｓｒｏｓｅｕｓＺｈｕＬｉｚｈｏｎｇ（ＤｅｐａｒｔｍｅｎｔｏｆＥｎｖｉｒｏｎｍｅｎｔａｌＳｃｉｅｎｃｅ），ＨａｎｇｚｈｏｕＵｎｉｖ...     

贵金属的准确测定

<正> 一、样品分解和分离方法虽然近年来分析仪器有了很大进展,但测定贵金属的基本手段在很大程度上仍是一些经典的化学法。取样和样品分解是准确测定过程中极为重要的一步。因此经典的火试金法在样品分解中仍保持重要地位,氧化熔融、混酸分     

Landscape ecological characteristics in temporal changes of riverside open space in urbanized area

１ＩｎｔｒｏｄｕｃｔｉｏｎＲｅｃｅｎｔｌｙｉｎＪａｐａｎ，ｔｈｅｒｉｖｅｒｓｐａｃｅｉｎｕｒｂａｎａｒｅａｓｉｓｃｈａｎｇｉｎｇｉｎｔｏｒｉｖｅｒｐａｒｋｓ，ｒｉｖｅｒｏｐｅｎｓｐａｃｅａｎｄｎａｔｕｒｅｏｒｉｅｎｔｅｄｂａｎｋ．Ｃｏｎｓｅｑｕｅｎ...     

Metal removal studied by a laboratory scale immobilized microalgal reactor

１ＩｎｔｒｏｄｕｃｔｉｏｎＩｎｄｕｓｔｒｉａｌｗａｓｔｅｗａｔｅｒｓ，ｐａｒｔｉｃｕｌａｒｌｙｔｈｏｓｅｄｉｓｃｈａｒｇｅｄｆｒｏｍｍａｎｕｆａｃｔｕｒｉｎｇｏｆｐｒｉｎｔｅｄｃｉｒｃｕｉｔｂｏａｒｄ（ＰＣＢ）ａｎｄｅｌｅｃｔｒｏｐｌａｔｉｎｇｃｏｎ...     

An application of a simple computer program for neutron activation analysis

ＩｎｔｒｏｄｕｃｔｉｏｎＮｏｗａｄａｙｓｔｈｅｎｅｕｔｒｏｎａｃｔｉｖａｔｉｏｎａｎａｌｙｓｉｓｔｅｃｈｎｉｑｕｅｉｓａｐｐｌｉｅｄｅｘｔｅｎｓｉｖｅｌｙｆｏｒｅｌｅｍｅｎｔａｌａｎａｌｙｓｉｓｏｆｃｏｍｐｌｅｘｓａｍｐｌｅｓ.Ａｒａｐｉｄｄｅｔｅｒｍｉｎａｔｉｏｎｏｆｅｓｔｉｍａｔｉｎｇｔｈｅｃｏｎｃｅｎｔｒａｔｉｏｎｏｆｅａｃｈｅｌｅｍｅｎｔｉｎｓｕｃｈｍａｔｅｒｉａｌｓｉｓｎｅｅｄｅｄ .Ｃｏｍｐｕｔｅｒｐｒｏｇｒａｍｍｅｓａｐｐｌｉｅｄｆｏｒｔｈｉｓｐｕｒｐｏｓｅｉｎｍａｎｙｄｉｆｆｅｒｅ…