Correct classification of chemical waste: class I and class II.

The correct classification of chemical waste is waste gas, waste liquid and waste residue.

1. Waste gas, also known as gaseous waste, mainly refers to the volatiles of experimental reagents and sample management, waste gas formed in the process of analytical chemical sample management, harmful substances and toxic gases formed in the process of experimental operation, leaked and discharged standard gases and carrier gases, etc.

2. Waste liquid, also known as liquid waste, mainly refers to unnecessary sample management, residual liquid after experimental operation, residual liquid from standard curve qualitative analysis and sample management, invalid storage liquid and washing liquid, container detergent used for experimental operation, etc. It is divided into inorganic waste liquid and organic waste liquid.

3. Waste residue, also known as solid waste, mainly refers to the products of unnecessary sample management, generation and qualitative analysis, expired or invalid chemicals and consumed or damaged experimental operation supplies (such as glass containers and medical gauze).

Hazards of chemical waste:

1 Destroy the ozone layer

According to the research results, chlorine-containing chemicals, especially chlorofluorocarbons, will destroy stratospheric ozone, which can reduce the radiation of solar ultraviolet rays to the ground. The reduction of ozone will lead to an increase in the amount of ultraviolet radiation received by the ground, which will lead to an increase in the incidence of skin diseases.

2, leading to the greenhouse effect

The influence of greenhouse effect mainly includes global warming and sea level rise. Sea level rise will seriously threaten the production and life of people in low-lying islands and coastal areas.

3. Harm to soil

A large amount of chemical waste entering the soil will lead to soil acidification, soil alkalization and soil hardening.