2024 Author: Howard Calhoun | [email protected]. Last modified: 2023-12-17 10:16
Chemical hazardous facilities are facilities (whether laboratories, institutions or enterprises) that store, process, use or transport hazardous chemicals that can harm the he alth of the nearby population. Moreover, the amount of substances transported to chemically hazardous facilities exceeds the threshold value, and when they are destroyed, people, animals and the environment as a whole can be infected. Chemically hazardous facilities are enterprises of the chemical, oil refining, meat and dairy, food industries, bases and cold storage plants with refrigeration units located on them that use ammonia. In addition, chemically hazardous facilities are water treatment and pulp and paper enterprises that use chlorine in the course of their work, as well as ports and railway stations that have tracks with rolling stock with chemically hazardous substances. Also, this type of object includes absolutely any transport - whether it be a bicycle or an airplane that transports chemically hazardous goods. Chemically hazardous objects areand institutions of a scientific, medical or educational type that have their own chemical laboratory. Here you can also add warehouses, bases and other premises storing pesticides, and landfills on which chemically hazardous substances and other industrial waste "rest". Acids (nitric and sulfuric), hydrogen sulfide, ammonia, carbon disulfide, chlorine and other chemicals are most often used at such hazardous facilities.
Classification of chemically hazardous objects can be carried out according to different criteria:
- toxicity;
- quantity;
- storage technology for emergency chemically hazardous substances;
- production signs (producing or consuming hazardous chemical substances).
Chemical hazardous objects are also divided into 4 classes.
Classes | Number of people entering the contamination zone during a chemical accident (thousand people) | Radius of the sanitary protection zone surrounding the object (in meters) | Percentage of the population that does become infected in a suspected chemical contamination area |
1st | more than 75 | 1000 | over 50 |
2nd | 75-40 | 500 | 50-30 |
3rd | under 40 | 300 | 30-10 |
4th | 0 | 100 | under 10 |
Characteristicchemically hazardous objects gives by no means reassuring information about their safety. Any emergency chemically hazardous substance is capable of easily "invading" the environment, thereby causing mass poisoning among the population. And it turns out that they thus harm the world around them due to the physicochemical and toxic properties of these substances. The most important and decisive properties here are ignition, flash, boiling and freezing points, state of aggregation, corrosiveness, solubility, viscosity, density, heat of vaporization, volatility, diffusion coefficient, hydrolysis and saturated vapor pressure. But there are many other properties that also play an important role in the "life" of these hazardous substances and, as a result, 0 in people's lives.
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