Heterogeneous Fenton Degradation of Organic Pollutants in Water Enhanced by Combining Iron-type Layered Double Hydroxide and Sulfate.

Water pollution derived from organic pollutants is one of the global environmental problems. The Fenton reaction using Fe as a homogeneous catalyst has been known as one of clean methods for oxidative degradation of organic pollutants. Here, a layered double hydroxide (Fe Al -LDH) containing Fe and Al in the structure was used to develop a "heterogeneous" Fenton catalyst capable of mineralizing organic pollutants. We found that sulfate ion (SO ) immobilized on the Fe Al -LDH significantly facilitated oxidative degradation (mineralization) of phenol as a model compound of water pollutants to carbon dioxide (CO ) in a heterogeneous Fenton process. The phenol conversion and mineralization efficiency to CO reached >99% and ca. 50%, respectively, even with a reaction time of only 60 min.