污染物

These results indicated that a well structured anatase TiO2 was obtained by impregnation method under 500℃. Flow rate, in the activity test, could be neglected for mass transfer effects. As a matter of fact, relative humidity played the most important role in this reaction. The highest removal efficiency was obtained while relative humidify of 56.8%. Water molecules are sources of ; however, excessive water molecules could inhibit reactions by competing activity sites with organic containments. In the regeneration test, photocatalyst could be reactivated through a running water vapor with UV light illumination process.

研究结果指出，以含浸法制备之触媒於500℃锻烧下，具有良好的锐钛矿晶体结构；另外在活性测试的部份，流量的增加，污染物之去除效果不受影响，所以本实验选择以200ml/min之流量可忽略质传影响；湿度扮演重要的角色，当RH=56.8％时去除效率最高，主要因水气是产生氢氧自由基的主要来源，但是过多之水气可能与有机物竞争触媒表面上的活性位置，因而抑制反应的进行；初使浓度对去除率之影响中得知，初使浓度的高低不会影响触媒对有机物的催化能力，实验使用之触媒量适合催化200~250ppm之有机物，可藉由增加触媒量提高对有机物之催化能力；此外再生的测试，触媒可经由连续曝水及紫外光的照射，使触媒恢复原有的活性，可再次利用。

In most water disposal, it pay attention to pollution, and color and Ultimate oxygen demand. But, some like Hydrargyrum, Cadmium and other minim-element, because of minuteness content, it has difficulty to inspect. But super-scale minim-element has harm to body's health. In an more and more pollution society, to inspect the minim-element is especially importance.

在处理自来水的过程中，大多只注重了水中的污染物，色度和部分有机物，对于水中含有的各种微量元素，例如：汞，镉，锌等，通常由于其含量微小，而对其进行常规监测有一定的难度，但是微量元素超标对人体健康有着极其的危害，在社会污染日趋严重的今天，对微量元素的监测显得格外重要了。

Compared with the year of 2002, the polluted ranges of offshore marine areas, such as the estuaries and loughs expanded to some extent in 2003, with the main pollutants including: petroleum, inorganic nitrogen, activated phosphate, hydrargyrum and so on.

大部分海域海水水质基本良好，符合清洁、较清洁海水水质标准，远海、近海海水水质优于近岸；与2002年相比河口、港湾等近岸海域污染范围有所扩大，主要污染物是石油类、无机氮、活性磷酸盐和汞等。

The hydrocarbon contamination of the environment is a serious threat to the health of human and ecosystem.

环境中广泛存在的石油烃污染物对人体健康和生态系统的安全构成了很大威胁。

The petroleum hydrocarbon contamination of the environment is a serious threat to the health of human and ecosystem.

环境中广泛存在的石油烃污染物对人体健康和生态系统的安全构成了很大威胁。

In terms of environmental hydrodynamics, more and more attention has been attached to pollutants release characteristic from sediment s in estuary area.

在环境水动力学中，河口地区的河流底泥污染物释放扩散特性的研究越来越受到人们的重视。

Stuart Abramson, MD, a pediatric immunologist at Texas Children''s Hospital, also in Houston, says that cigarette smoke contains about 4,000 chemicals and a sizable number of carcinogens and contaminants, including benzene, butane and hydrogen cyanide.

斯图尔特阿布拉姆森，医学博士，儿科免疫学家在得克萨斯州儿童医院，也是在休斯顿说，香烟烟雾中含有约4000种化学物质和相当多的致癌物质和污染物，包括苯，丁烷和氰化氢。

In the electrolytic exhaust gas of aluminium, the hydrogen fluoride is the main pollutant , so it is to judge one of the important standards up to standard of in electrolytic discharge of aluminum smelter to measure the content that the exhaust gas hits the hydrogen fluoride.

在铝电解烟气中，氟化氢是最主要的污染物，因此检测烟气中氟化氢的含量是判断电解铝厂排放是否达标的重要标准之一。

To protect environment and prevent the jeopardize of pollutant, working over hydraulic characteristic of pollutant diffusing is very content from the aspect of hydrodynamics and hydrokinetics.

为了保护环境，防止污染扩散的危害，因此，从流体力学和动力学方而着手研究污染物在河道中扩散的水力学特性是很有意义的。

This article submits some suggestions about the effect of the hydrophyte s on wastewater and lake treatment by summaring the hydrophyte s' purging to all kinds of pollutants such as nitrogen,phosphorus,heavy metal and deleterious organic.

随着经济的发展、工农业废水的排放，水体被大量污染。通过水生植物对氮、磷，重金属及有毒有机物等各类污染物的清除作用的了解。对水生植物在废水处理和湖泊治理方面提出了相应的建议。参4

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。