Teaching Materials for Environmental Education -Approach to environmental surroundings with the guidance of nitrogen-compounds-

作为环境教育的教材之一，环境污染物质简单测定方法的发展和自然界中几种有趣的澄清力都被广泛地研究和应用于义务教育教学中。人们发现，除了丝绸制品外，燃烧任何特定的日常必需品，如各种纸、衣服和塑料制品所产生的烟雾都很容易产生酸雨。塑料燃烧产生的灰烬对植物生长有负面影响，而且很难在土壤中生物降解。将改进后的二氧化氮测定方法应用于熊本县大气污染状况的测量。研究发现，二氧化氮的含量受天气（风和雨）、地面结构和建筑物的显著影响。“消光材料”对于去除二氧化氮非常有用。研究发现，活性炭和活性炭对河流中铵、硝离子等共存的化学物质有较好的吸附能力。生活废水酸度和表面活性剂对柠檬草生长有显著影响。这些特性已应用于实际环境水体污染的估算；河流，池塘等等。证实了土壤中铵离子在硝化细菌的作用下转化为硝酸盐离子。最后，发现了大自然一直以来的许多妙招，这些成果得到了支持，对义务教育中的环境教育具有很大的价值。

As one of the teaching materials for environmental education, both developments of simple determination methods for environmental pollution matters and several kinds of interesting clarification powers in nature have been widely investigated and applied to teachings in compulsory education.It was found that an acid rain can be easily made from smoke produced by buring any given daily necessaries such as kinds of paper, clothes and plastic goods, except for silk ones. The ashes obtained by combustion of plastic are affected negative interferences for a plant growth and are very difficult to biodegrade in soil.The improved determination method for nitrogen dioxide was applied to the measurement of the air pollution condition in Kumamoto Prefecture. It was found that the amounts of nitrogen dioxide are remarkable influenced by weather (wind and rain), configuration of the ground and building. "Igusa (materials for matting)" is very useful to remove the nitrogen dioxide.It was found that charcoal and activated carbon are great adsorptive capability for co-existing chemical species in river such as ammonium and nitrate ion. Lemna growth is notably affected by acidity and surface-active agents of domestic waste water. These characteristics of lemna have been applied to the estimation for the pollution of actual environmental water; rivers, ponds and so on. It was confirmed that ammonium ion is transformed into nitrate ion by the action of nitrifying bacteria in soil.Finally, it was found that the nature has been thought of many clever tricks, and these results obtained support to great valuable for Environmental Education in compulsory education.