问题
问答题 简答题
污水处理中的化学方法及原理是什么？
答案
参考答案：
污水处理常见方法有：物理方法，化学方法和生物方法。其中化学方法包括中和法、氧化还原法和沉淀法。这三种方法中：中和法适合于处理酸性污水；氧化还原法适合处理油类、氧化物、硫化物等，空气、臭氧、氧气是常用的氧化剂；沉淀法适合于处理含重金属离子污水，如加入适量的碱控制废水的pH值。
搜题请搜索小程序“爱下问搜题”
污水处理中的化学方法及原理是什么？
参考答案：
污水处理常见方法有：物理方法，化学方法和生物方法。其中化学方法包括中和法、氧化还原法和沉淀法。这三种方法中：中和法适合于处理酸性污水；氧化还原法适合处理油类、氧化物、硫化物等，空气、臭氧、氧气是常用的氧化剂；沉淀法适合于处理含重金属离子污水，如加入适量的碱控制废水的pH值。
In the old days, the Olympic Games were religious（宗教的）activities. Greece held the first Olympic Games in the eighth century B.C. The Games lasted just for one day and there were only races. Only men could be in the races. Women had no right（权利）to take part in the Olympic Games until 1912. The Olympic Games were stopped in the fourth century. Then they started again in Athens in 1896. This was the beginning（开始）of the modern Olympics. Since then, the Olympics Games have been held every four years. The Olympic rings are a symbol of the Olympic Games. There are five rings, and they stand for the five parts of the world. The colors of the rings are blue, yellow, black, green and red. You can find at least one of these colors in the flag of each country in the world. The IOC（国际奥委会）makes rules for the games, so all the athletes have the same chance to win. Winning in the Olympics is a great honor. An athlete who wins at the Olympics is the best in the world. “Faster, higher, stronger”is the motto of the Olympics. 任务型阅读：根据短文内容填写下列空格。
|