Tiny, self-assembling traps capture dangerous pollutants, PFAS

Science Daily  May 27, 2020 To find out whether molecular cages could help trap PFAS (per- and polyfluoroalkyl) a team of researchers in the US (SUNY Buffalo) screened about a dozen different types of self-assembling cages that contain metals. This process led the team to the iron-based cages, which captured a subset of PFAS with chains of six or more fluorinated carbon atoms, including perfluorocarboxylic acids, sulfonic acids and fluorotelomers. Through analysis they found that the PFAS stick strongly to the outside of the cages instead of getting caught inside. The study gives scientists new knowledge that could help them […]

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 […]