论文部分内容阅读
目前全球都面临着水资源紧缺问题,水污染日趋严重,污水治理和环境保护迫在眉睫。让学生通过对水污染的产生及其治理方法有关化学知识的学习,了解污水治理流程,增强环保意识。下面根据生活中的实例进行分析。一、水体污染及其危害的考查例1.水体被重金属元素污染时,水中的重金属污染物可以通过水中的食物链被富集,浓度逐级加大,而人正处于食物链的终端,通过食物或饮水,会引起中毒。日本震惊世界的公害事件——水俣病就是重金属中毒
At present, the world is facing the problem of water shortage. The water pollution is getting worse day by day. Sewage treatment and environmental protection are imminent. Let students learn about the chemical knowledge through the production of water pollution and its treatment methods, understand the sewage treatment process and enhance environmental awareness. The following examples based on life analysis. First, the water pollution and its hazard test cases 1. When the water is polluted by heavy metal elements, the water of heavy metal pollutants can be enriched through the food chain in the water, step by step increase in concentration, while people are at the end of the food chain, through the food or Drinking water can cause poisoning. Japan Shocked the World’s Pollution Incidents - Minamata disease is a heavy metal poisoning