The boron content in seawater is generally around 5ppm. In some European sea areas, the boron content in seawater can even be close to 10ppm. Although RO reverse osmosis can reach a maximum rejection rate of 99% for inorganic salts in water, its efficiency in boron rejection is limited. , even after secondary reverse osmosis treatment, the boron content is still 1-2ppm. Our country stipulates that the boron content in drinking water should be less than 0.5ppm. Kingshan provides boron removal materials.