权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Development of Teaching Materials on Environmental Education in Chemistry

化学环境教育教材的开发

基本信息

批准号：
06680177
负责人：
TANAKA Haruhiko
金额：
$ 1.34万
依托单位：
HIROSHIMA UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1994
资助国家：
日本
起止时间：
1994 至 1995
项目状态：
已结题

项目摘要

It was examined the possibility of introducing the treatments of heavy metal wastewater produced by the chemical experiments in schools into the secondary elemental and high school chemistry classes as teaching materials of environmental education. Reaction cycles of copper, silver, aluminium, iron, chromium and manganese were established with reference to the practical conditions of the respective levles of school. It was proposed to employ suitably the chemical reactions involving the reaction cycles as the teaching materials of chemical reaction and/or environmental education. It was described the proper treatments of the heavy metal wastewater produced by the chemical experiments in the secondary elemental and high schools. Appropriate experimental conditions for the wastewater treatments were also specified for using the practices as the teaching materials of students' experiments. In addition, several teaching materials relating to the reaction cycles of the heavy metals were newly develped. Concerning the development of reaction cycle of copper, the precipitation reactions of basic copper (II) compounds were utilized as the teaching materials of chemical experiments aiming at the treatment of wastewater and the determination of chemical composition of such basic salts. Reaction cycle of silver appropriate for the secondary element school was proposed. The chemical reactions involved in the reaction cycle can also be used for teaching the thermal decomposition and electrolysis. Several teaching materials of chemical experiments using the aluminium can were developed and introduced into the reaction cycle of aluminium. From a view point of oxidation reaction of iron in air, the influence of the environmental conditions on the crystalline structure of product iron (III) oxyhydroxide were investigated. As a result, it was pointed out that the structural deformation of iron (III) oxyhyroxides can be used as the teaching material in relation to acidic rain.

探讨了将学校化学实验产生的重金属废水处理引入中小学化学课堂作为环境教育教材的可能性。铜、银、铝、铁、铬和锰的反应循环是参照各自学派的实际情况建立的。建议适当使用涉及反应周期的化学反应作为化学反应和/或环境教育的教材。介绍了中小学化学实验产生的重金属废水的处理方法。并确定了废水处理的适宜实验条件，可作为学生实验的教材。此外，还开发了几种与重金属反应循环有关的教材。在开发铜的反应循环方面，利用碱性铜(II)化合物的沉淀反应作为化学实验的教材，旨在处理废水和测定此类碱性盐的化学成分。提出了适合于二次元素学派的银的反应周期。反应周期中涉及的化学反应也可用于热分解和电解法的教学。开发了几种使用铝罐的化学实验教材，并将其引入到铝的反应循环中。从铁在空气中的氧化反应的角度，考察了环境条件对产物氢氧化铁晶体结构的影响。由此指出，铁(III)氧化合物的结构变形可以作为酸雨的教材。