固定污染源烟尘监测质量的探讨

固定污染源烟尘是大气污染的重要来源之一。测试烟尘浓度是检查污染源排放的尘粒是否符合排放标准的重要手段；是为大气质量管理与评价提供依据的重要手段。监测烟尘的一般方法是滤筒重量法。现在通常用的仪器(特别是四级站)是JYP-Ⅱ型静压平衡烟尘浓度测定仪。     

检测水中亚硫酸还原厌氧梭菌孢子的培养液富集法

水体中亚硫酸协还原菌的孢子，能在水中生存较长时间，容易在水池或管道中滋生，产生黑臭，可作为水体长期或周期性污染的一种指示，但目前国内尚无测定该菌的完整方法，作者建立了一种比较适合我国国情的测定方法，以国产蛋白陈替代胶胨型的水解液，结果阳性特征明显，精密度，重现性均较好。     

从废电子元件提钯后的残渣中提取银

氯化浸出钯后，浸渣中的银以氯化银状态存在，用铁粉置换使氯化银转变成金属银，经过滤，洗涤后用硝酸浸出，氯化钠沉银，然后还原得银粉。     

沈阳市大气微生物的研究

用ＡＮＤＥＲＳＥＮ生物粒子采样器在沈阳市对大气细菌粒子浓度和革兰氏染色形态特征进行了一年的观测．结果表明，细菌粒子的种类年平均浓度分布，是随着地区的季节、时间、场所和人群活动的变化而变化．     

硫精砂尾矿还原硫酸烧渣的研究

利用硫精砂尾矿还原硫酸烧渣，从而提高烧渣中的铁的浸出率，达到综合利用尾矿及烧渣，减轻污染的目的。结果表明，把烧渣和尾矿按４－６比１的比例混合，在７００－８００℃处理３０ｍｉｎ，铁的浸出率比处理前增加３倍。文中还讨论了还原机理。     

多边形源下风方向的污染物浓度

面源下风方向空气颗粒物或气体浓度计算涉及到二重积分。当面源是圆形或多边形时,文中给出了高斯烟流模型降解为一重积分的形式。文中还给出了当下风距离超过窄烟流近似法应用极限距离2到3倍时的近似计算方法,精确度达到了10％,计算速度提高了5倍。     

低DO浓度下短程硝化试验研究

进水氨氮浓度不变，低DO下启动并运行了短程硝化试验，考察了反应器内的氨氮氧化和亚硝酸盐积累情况。试验结果表明反应器内氨氮几乎全部被氧化，污泥浓度从4500mg／L下降到870mg／L，此时亚硝酸盐的积累率为55％，说明只控制DO的浓度很难实现高的积累率，同时受到温度和污泥龄等的较大影响。     

Spatial variations in daily average CO2 concentrations above wetland surface of Xianghai National Nature Reserve, China

Horizontal and vertical variations of daily average CO2 concentration above the wetland surface were studied in Xianghai National Nature Reserve of China in August, 2000. The primary purpose was to study spatial distribution characteristics of CO2 concentration on the four levels of height(0.1 m, 0.6 m, 1.2 m and 2 m) and compare the differences of CO2 concentration under different land covers. Results showed that daily average CO2 concentration above wetland surface in Xianghai National Natural Reserve was lower than that above other wetlands in northeast China as well as the worldwide average, suggesting that Xianghai wetland absorbed CO2 in August and acted as“sink” of CO2. The horizontal variations on the four levels of height along the latitude were distinct, and had the changing tendency of“decreasing after increasing” with the increase of height. The areas with obvious variations were consistent on different levels of height,and those with the highest variations appeared above surface of shore, sloping field, Typha wetland and Phragmites wetland; the vertical variations were greatly different, with the higher variations in Phragmites wetland and Typha wetland, and the lands near the shore and the sloping field with the lower variations. Spatial variations of daily average CO2 concentrations above wet!and surface were affected by surface qualities and land covers.