Mn-Cu-O负载型催化剂上CO氧化性能的研究

研究了ＺｒＯ２或Ａｌ２Ｏ３负载Ｍｎ－Ｃｕ－Ｏ体系催化剂ＣＯ催化氧化活性，以及物相结构，表面氧性能与活性的关系。结果表明，锆基催化剂的氧化活性明显优于铝基催化剂，起燃温度Ｔ５０低达５０℃，ＺｒＯ２载 利于活性组份形成高活性物相，并促进表面吸附氧的脱附，表现出催化剂表面吸附氧的脱附温度高低次序与其氧化活性有一致的对应关系。     

TTC－脱氢酶活性检测方法的研究

以好氧消化污泥为材料，对影响脱氢酶活性测定的样品前处理、生化培养、酶反应终止剂、三苯基甲Ｚａ（ＴＦ）苯取剂以及萃取条件等问题进行了系统地研究，进而提出了检测脱氢酶活性的常温萃取测定法。这种方法已在剩余污泥好氧消化处理、生物转盘处理生物制品废水以及陶粒柱反应器低温生物预处理饮用水等研究中应用，效果良好。     

明渠潮流中垂向紊动射流流场的数值模拟

选用ｋ－ε双方程紊流模型，对自由水面做“动”刚盖假设，建立了明渠潮流中垂向射流流场的数学模型，根据潮汐流动返复回荡的特点，对离散方程组的求解采用“跟踪扫描”逐行求解法，保护和加快了解的收敛，计算了５种不同回荡周期情况下射流流场的变化过程，预报回流区高度与实测值吻合。分析了潮汐非恒定性的影响，获得了一些有益的结论。     

Fe3+催化氧化S(Ⅳ)反应机理初探

通过分析酸性条件下(pH为1～3),Fe3 催化氧化S(Ⅳ)过程中溶液吸光度变化的趋势,对Fe3 催化氧化S(Ⅳ)的反应机理进行了初步推导.实验证明,液相中该反应机理主要是催化氧化与自由基反应相结合,O2的存在对于反应有重要作用,O-2的生成是S(Ⅳ)被氧化的关键;当水中溶解氧接近耗尽时,反应进程发生改变.当Fe3 、S(Ⅳ)浓度增加,自由基生成量增加时,有利于反应进行;作为反应产物,Fe2 、S(Ⅵ)浓度增加,反应推动力减小,反应速率降低;同时Fe2 、SO24-可以与溶液中的其它物质形成配合物,影响了Fe3 -S(Ⅳ)配合物的生成与分解,不利于S(Ⅵ)的氧化.     

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.     

Application of compost in agricultural practice could potentially cause contamination of foodstuffs with pathogenic bacteria such as Escherichia coli O157:H7. This study investigated pathogenic bacteria in compost collected from the compost facilities, an

IntroductionIncreasing public interests have been concerned onsafety foods and the environmental aspects recently,especially on the so-called organic foods , which are madefromcrops grown with organic fertilizers or compost but notchemical fertilizers .Pu…     

垃圾填埋场内部CH4浓度随时间的变化特征及其模拟

通过对佛山市五峰垃圾填埋场内部部分时段CH4浓度的监测 ,分析了在填埋场内部垃圾发酵过程中CH4浓度随时间的动态变化特征 ,提出了利用某些统计曲线分别模拟或综合模拟CH4浓度随时间的变化过程的方法 .应用表明 ,本方法可以较准确地预测垃圾发酵主要时段内的CH4浓度随时间的变化 ,仅在垃圾发酵的尾声阶段 ,模拟浓度与实测浓度有少许出入 .     

液体化工罐区静电产生的原因及防范措施

对液体化工罐区静电产生的原因及可能产生的严重危害性做了详细的分析,并提出了防范措施.     

活性污泥作为气化用型煤粘结剂的研究 Ⅰ.污泥添加量和型煤成型条件的考察

以活性污泥为研究对象，以合成氨厂广泛使用的白泥型煤参照，进行了气化用型煤粘结剂的研究，结果表明，当污泥添加量为２％白泥添加量为０．３％时，所制得的型煤抗压强度、跌落强度、热稳定性与白泥型相当。     

河流沉积物重金属污染质量控制基准的研究 Ⅰ.C-B-T质量三合一方法(Triad)

在综合数据库ＣＥＲＰ－ＤＢＭＳ支持下，利用水体沉积物质量三合一工具，初步建立江西乐安江表层沉积物中重金属污染的质量控制基准。通过将化学分析、毒性鉴定２和底栖群落结构变化三基元集成为一体的三轴图和相应的响应信息判断矩阵，基于现场生物响应的重金属污染的剂量－响应关系。