PVA plastic bags are a type of biodegradable plastic bag that is typically made from polyvinyl alcohol (PVA). The decomposition rate of PVA plastic bags in soil depends on several factors such as temperature, humidity, soil pH, etc. Generally, PVA plastic bags take about 3 months to 6 months to decompose naturally in soil, but the actual time may vary depending on environmental conditions. If PVA plastic bags are discarded in water bodies or rivers, their decomposition rate may be faster or slower due to the different environmental conditions.

PVA plastic bags are a type of biodegradable plastic bag because their main material, polyvinyl alcohol (PVA), is a natural polymer compound that can be decomposed by microorganisms. Therefore, the decomposition rate of PVA plastic bags in soil is relatively fast. The decomposition rate of PVA plastic bags is mainly affected by the following factors:

Temperature: At higher temperatures, microbial activity is more active, and the decomposition rate of PVA is faster.

Humidity: In an environment with higher humidity, microorganisms are more likely to grow and reproduce, which accelerates the decomposition of PVA.

Soil pH: Different microorganisms have different adaptability to different pH values, so the pH value of the soil also affects the activity of microorganisms and the decomposition rate of PVA.

PVA plastic bags usually take 3 months to 6 months to decompose naturally in a general natural environment such as soil. However, if PVA plastic bags are discarded in water bodies or rivers, their decomposition rate may be faster or slower due to different environmental conditions.

It should be noted that although PVA plastic bags are biodegradable plastic bags, if they are mixed with other plastic garbage, their decomposition rate and efficiency will be reduced, and they may even cause more pollution to the environment. Therefore, correct classification and disposal of garbage are important measures to reduce plastic pollution.