中学化学实验室气体环境的实测研究

对中学化学学生实验活动中产生的气体污染物进行测试,得到不同通风条件下化学实验室内部空气污染物的数据。结果表明,中学化学学生分组实验产生的主要气体污染物有苯、甲苯、甲醛、氨气等,实验过程中如不采取任何通风措施,实验室气体污染物的浓度短时间内会急剧升高,所以采取有效措施对实验室内部空气污染物进行消除是非常必要的。目前中学化学实验室配备的通风设备以桌面排风设备为主,相比于自然通风的环境,学生实验时开启桌面排风设备,能够有效降低实验产生的气体污染物浓度。

Research on Gas Environment in Chemical Laboratory of High School

Gas pollutants from students’ chemical experiment in middle school were measured and the indoor air pollutants data were collected in chemical laboratory under different ventilation conditions. The results showed that the main gas pollutants produced by the students’ group chemical experiments in middle school were benzene, toluene, formaldehyde, ammonia, etc. The concentration of gas pollutants in laboratory rose sharply in a short time without any ventilation measures in experiment procedure. As a result, it was necessary to take effective measures to remove air pollutants inside the laboratory. At present, the ventilation equipment provided in the middle school chemical laboratory is mainly desktop ventilation equipment. Comparing with the natural ventilation environment, turning on the desktop ventilation equipment during students’ experiments can effectively reduce the concentration of gas pollutants produced by the experiment.