Which characteristics do polyamide membranes, used for reverse osmosis, exhibit?

Polyamide membranes, a popular choice in reverse osmosis systems, are known for their specific attributes and limitations. They typically exhibit susceptibility to degradation from certain chemicals, particularly free chlorine. This is significant, as exposure to free chlorine can lead to the breakdown of the membrane material, impairing its function and overall lifespan. Additionally, these membranes are not designed to operate effectively at elevated temperatures; degradation can occur at temperatures exceeding around 35°C, which limits their applicability in high-temperature environments.

When assessing the characteristics of polyamide membranes, it is essential to recognize their performance in various conditions. While they are proficient in the removal of dissolved salts from water, the correct answer highlights their vulnerability to environmental factors like free chlorine and temperature, which is crucial for users to consider when selecting or maintaining filtration systems. Understanding these limitations helps users in making informed decisions regarding water treatment processes.