Iron functionalized silica particles as an ingenious sorbent for removal of fluoride from water.

The paucity of safe drinking water remains a global concern. Fluoride is a pollutant prevalent in groundwater that has adverse health effects. To resolve this concern, we devised a silica-based defluoridation sorbent from pumice rock obtained from the Paka volcano in Baringo County, Kenya.

Penta-carbon-yl{3-[(2S)-1-methyl-pyrrolidin-2-yl]pyridine}tungsten(0).

The title compound, [W(C(10)H(14)N(2))(CO)(5)], contains five carbonyl ligands and a nicotine ligand in an octa-hedral arrangement around the tungsten atom. The metal atom shows cis angles in the range 87.30 (16)-94.