Teaching Materials for Environmental Education-Water Circulation System and Clarification Power in Nature-

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。研究发现，作为生活废水主要成分的大多数表面活性剂都能很容易地被河水生物降解。此外，河流中的沉积物或沙质土壤对表面活性剂的二降解和吸附都很有效。另一方面，澄清了土壤的有效性（缓冲作用和吸附力）。研究了金属在酸性溶液中的洗脱及其对水草生长的影响。测试的金属是铜、铁、铝和锌，它们被用作硬币、罐头和干电池。酸度的增加导致金属的大量流失，对水草的生长有不利影响。特别是Cu和Zn都具有显著的阻效应。另一方面，水葫芦是一种水草，可吸收一些有害金属，可用于澄清河水。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。结果表明，大气中二氧化氮的含量与大气中二氧化氮的含量呈显著的正相关，植物叶片可将空气中的二氧化氮去除。最后，人们发现大自然想出了许多巧妙的方法来保护自己免受污染。

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 river water could be easily biodegraded of most surfactants that were the main constituents of domestic waste water. Moreover, sediments or sandy soils in rivers have been found to be effective for both diodegradation and adsorption of surfactants. On the other hand, it was clarified the soil availability (the buffer action and adsorption power).The metal elution in acidic solution and the influence of metal eluted for the growth of aquatic weeds have been examined. The metals examined are Cu Fe Al and Zn, which are utilized as coin, can and dry cell. The increase in acidity causes a large a mounts of metal elution and has a negative effect on the growth of aquatic weeds. In particular both Cu and Zn give remarkable hindrance. On the other hand, the water hyacinth, a kind of aquatic weed, absorbs some harmful metals and is available for clarification of river water.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 dioxise and weather considerable correlated to each other, and nitrogen dioxide could be removed from air with a leaf of plant.Finally, it was found that the nature thought of many clever tricks to protect themselves against the pollution.