Synthesis of nano–silica and biogenic iron (oxyhydr)oxides composites mediated by iron oxidizing bacteria to remove antimonite and antimonate from aqueous solution: Performance and mechanisms

Magnetic polymeric ferric magnesium chloride: Fe species distribution, characterization and coagulation removal of microplastics in water

“…2a shows that the peaks of the three coagulants in the wavenumber range of 3200–3500 cm −1 and at 1630 cm −1 were attributed to the stretching vibration of O–H and the vibration of adsorbed or bound water in the coagulant. 44 However, the copolymers formed by Fe and Mg are mainly bonded through hydroxyl groups, so the absorption peaks of MPFMC, PFMC and PFC are basically the same. 45 Among them, the peaks of MPFMC and PFMC at 690 cm −1 may be caused by the bending vibration coupling of O in O–H by the asymmetric attraction of differently electronegative Fe and Mg.…”