湖泊水库入流河道排污总量分配方法的探讨

通过对青山水库入湖支流排磷总量分配的实例研究,着重介绍了对封闭性水域按纳污能力确定的“容量总量”进行合理分配的新思路：即根据污染影响叠加原理,建立各支流总磷允许排放率的计算模式,并由此合理分配各入库支流总磷的容许排放总量．从中探讨湖泊、水库等封闭性水域的污染物排放总量控制与水资源保护管理的新途径．     

现代柴油机排气污染物控制新技术

本文简要介绍了我国现行的柴油机排气污染物排放法规,提出了为满足此法规所应采取的措施,并就现代柴油机气污染物控制的新技术予以阐述。     

城市街道峡谷机动车排气污染扩散的研究现状

随着城市机动车保有量的增加,机动车排放物在大气污染中所占的比例越来越大。研究机动车排放物在城市街道峡谷的扩散规律,可为城市机动车排放控制,城市街道建设,交通流量控制,城市街道大气污染的监测、评价及防治提供科学依据。本文叙述了目前城市街道峡谷内机动车污染物扩散的研究现状。     

Intrinsic photocatalytic oxidation of the dye adsorbed on TiO2 photocatalysts by diffuse reflectance infrared Fourier transform spectroscopy

Photocatalytic oxidation of aqueous pollutants by semiconductor photocatalysts was found efficient. The overall process by which the heterogeneous photocatalysis proceeds includes: the sequence of the adsorption of reactants, surface reaction and the desorption of final products. As a result, factors such as, the presence of oxygen concentration, pH values of the aqueous solution, pore properties for photocatalyst particles all determine the rate of photodegradation. This study is to concentrate on the photocatalytic mechanisms of the intrinsic reaction occurred on the photocatalysts and the adsorbed dye in air atmosphere. Additionally, the photocatalytic activities of adsorbed dyes prepared under different pH values were also examined and the solid-state results were compared with the aqueous systems at the same pH conditions. Dark adsorption experiments at different pH conditions showed that the saturation amount of dyes adsorbed on the catalysts differs significantly. However, the solid-state photodegradation rates of adsorbed dyes on TiO₂ at various pH values only showed slightly different, which is opposite to the results obtained from the aqueous systems. This evidence reveals that the external and internal mass transport processes are rate-controlling steps that restricted the photodegradation reaction of aqueous dyes at different pH conditions. Furthermore, this investigation supports a proposed direct photocatalytic mechanism for aqueous systems that the photocatalytic oxidation always begins with the adsorption process and the adsorbed dye will then be attacked by the excited hole–electron pairs and hydroxyl radicals from TiO₂ surface to produce final products.     

气相色谱法测定稀释剂车间空气污染物

用气相色谱法测定稀释剂车间空气中的有机物气体含量,SE－30柱分离,给出了色谱分离操作条件。     

污染物浸入水体过程的离散PI控制

法案物浸入水体是一个非常复杂的过程,应用离散PI过程控制理论,通过过程监视,过程的离散传递函数以及过程调整,建立了主要污染物的过程控制模型,对主要污染物指标的排放浓度实现了过程的PI控制,并在实际生产中得到了验证。     

齐齐哈尔市区地下水动态分析

阐述了齐齐哈尔市区地下水位的变化原因和趋势,分析了该市第四系潜水和第四系承压水的污染现状、污染源及污染原因。提出了防治建议。     

吹脱对含油类污染物地下水处理效果的研究

通过现场动态实验对影响吹脱除油效果的因素进行了研究。在确定最佳气水比为 5∶1、淋水密度为5 .0m3/m2 ·h的运行状态下 ,吹脱法对地下水中油类污染物的去除率能达到 5 0 %左右 ,同时还能去除水中的铁、氨氮等污染物质 ,提高水中的溶解氧     

一体式平板膜-生物反应器处理水中污染物研究

研究了一体式平板膜-生物反应器对水中污染物的去除效果。试验结果表明：系统对COD、NH3-N、TN、阴离子表面活性剂（LAS）均有很好的处理效果。其中生物降解起主要去除作用,平板膜对污染物的进一步去除、稳定出水水质起到了重要的作用。     

装载机排放试验方法研究

为简化非道路机械排放试验方法、缩短试验时间并准确判断试验结果,对某一配套162 kW发动机的5 t装载机按照排放标准要求进行实际作业循环排放试验。试验表明,装载机排放试验循环具有工况单一且稳定和选择性催化还原(selective catalytic reduction,SCR)上游排温波动小的特性。在试验基础上分析不同试验时间对应的排放结果,可知缩短一定试验时间对结果的影响误差在3%以内;通过分析SCR上游排温对排放结果的影响,可以利用SCR上游排温范围对应的SCR转化效率快速评价试验结果,简化了试验方法。