title: Apology letter.
authors: Chicgoua
authors: C
authors: Noubactep
mesh_terms: D002713:Chlorine / Q000302:isolation & purification*; D001556:Hexachlorocyclohexane / Q000737:chemistry*; D007501:Iron / Q000737:chemistry*; D010165:Palladium / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods*
chemical_list: D014874:Water Pollutants, Chemical; D002713:Chlorine; D001556:Hexachlorocyclohexane; D010165:Palladium; D007501:Iron