eak acid cation (WAC) resin plays an important role in water treatment. It is usually
manufactured from acrylic acid and divinyl benzene (DVB) as a crosslinking agent,
although some manufacturers make it from methacrylic acid or its derivatives. It is a
widely used unit in demineralisation plants for dealkalisation of water. The total capacity
of WAC resin at 210 gl as CaCO3 is higher than other ion exchange resins. The resin is
regenerated with dilute acid using near stoichiometric quantity. Hence, the waste water
generated during regeneration is almost neutral. WAC resin operates in a alkaline pH
range and exhibits large volume change when converted to different forms. Hence, it is
called the workhorse of water treatment processes.

eak acid cation (WAC) resin plays an important role in water treatment. It is usually
manufactured from acrylic acid and divinyl benzene (DVB) as a crosslinking agent,
although some manufacturers make it from methacrylic acid or its derivatives. It is a
widely used unit in demineralisation plants for dealkalisation of water. The total capacity
of WAC resin at 210 gl as CaCO3 is higher than other ion exchange resins. The resin is
regenerated with dilute acid using near stoichiometric quantity. Hence, the waste water
generated during regeneration is almost neutral. WAC resin operates in a alkaline pH
range and exhibits large volume change when converted to different forms. Hence, it is
called the workhorse of water treatment processes.