(1) Residual chlorine attack: The chlorine-containing bactericide is added to the influent of the system, and it is not completely consumed after pretreatment, and enters the reverse osmosis system.
(2) Trace residual chlorine and heavy metal ions in the incoming water, such as Cu2+, Fe2+ and Al3+, undergo catalytic oxidation reaction in the polyamide desalination layer.
(3) The water treatment process used in addition to residual chlorine oxidizing biocides, such as chlorine dioxide, potassium permanganate, ozone, hydrogen peroxide, etc. The residual oxidant enters the reverse osmosis system and causes oxidative damage to the membrane.
