Home & Garden

Lewatit® Ion Exchange Resins and Lewabrane® membranes for home and garden


Hard water is more than annoying in the home as much as anywhere else. It has detrimental effects on the service life of household water infrastructure and numerous household appliances, from the kettle to the shower, the dishwasher and the washing machine. Limescale deposits make laundry hard and gray and leave behind ugly marks on glasses and dishes. Hard water also means that more cleaning agent or detergent is required. Finally, coffee and tea taste much better when they are made with soft, low-lime water.

Decarbonated, and therefore soft, water can be easily and conveniently produced in household volumes using ion exchange resins from LANXESS. Easy-to-use, long-lasting cartridge systems based on Lewatit® that can be used for this are available to buy. These remove the calcium and magnesium salts that cause hardness while still tolerating even high concentrations of chlorine or other disinfection agents. Equipped with monodisperse resins, these filters cause only minimal loss of pressure, are easily exchangeable and demonstrate a high level of long-term stability. Particularly in regions with exceptionally hard drinking water, water quality can be significantly improved in this way, even up to complete softening using extremely acidic resins in their sodium form. This also applies to larger facilities that can supply remote locations or even whole villages and towns with soft drinking water. These filters can also be relied upon to remove the lead, nickel and copper ions that are dangerous to health.

Ion exchange resins also have a valuable role to play when it comes to enriching water with particular ions. This is used for fertilizing plants in hydrocultures, for example. In this case, Lewatit® HD 50 can continuously provide the plants with key mineral nutrients such as nitrogen, phosphate and potassium, as well as trace elements such as iron, manganese, copper, zinc, boron and molybdenum over weeks and even months. At the same time, the irrigation water is partially softened, which also aids the healthy growth of the plants. Undesired enrichment with salts or over-fertilization is virtually eliminated.