A reagent system for bromination was prepared with Zn/Al-Br O3–-LDHs as a carrier and bromide ion as an appropriate reductant. The release behavior of Br O3– was investigated to achieve the controlled release of bromine in practical application. Also, the effects of temperature, type of ion exchanger and p H value on the release behavior were investigated. The results indicate that the release rate becomes more rapidly when the temperature and the anionic exchanging capacity increase, and the Br O3– release...