Engineered sand zaps storm water pollutants

Science Daily  August 30, 2018 To provide a passive, low-cost means of oxidizing substituted phenols, aromatic amines, and other electron-rich organic compounds during infiltration of contaminated waters, an international team of researchers (USA – UC Berkeley, the Netherlands) coated sand with manganese oxide using a new approach involving the room-temperature oxidation of Mn2+ with permanganate. The coated sand effectively oxidized bisphenol A under typical infiltration conditions and sustained reactivity longer than previously described geomedia. The results suggest that it is possible to regenerate the oxidative capacity of manganese oxide-coated sands without excavating stormwater infiltration systems and manganese oxide geomedia may […]