Preparation and Characterization of Magnetic Iron Nanoparticles on Alginate/Bentonite Substrate for the Adsorptive Removal of Pb2+ Ions to Protect the Environment

Chromium measurement in pharmaceutical samples: a comparative study of three new membrane electrodes with different electron-ion exchangers

“…Considerable alterations in the membrane spectrum in contact with chromium( iii ) solution indicate the interaction between chromium( iii ) and N -(thiazol-2-ylcarbamothioyl) benzamide ions in a PVC membrane matrix. 36,37…”

“…Considerable alterations in the membrane spectrum in contact with chromium(III) solution indicate the interaction between chromium(III) and N-(thiazol-2-ylcarbamothioyl) benzamide ions in a PVC membrane matrix. 36,37 The strong reduction in the peak at wavelength number ∼1722 cm −1 equivalent to C]O stretching vibration reveals a chelate bond with the chromium(III) ion formed by the O atom. The oxygen atom presents its pair of electrons to the electropositive chromium(III) ion thus weakening the C = O bond and reducing its strength.…”

Sodium Alginate/Modified Bentonite Composite Bead Adsorptive Removal of Norfloxacin: Static and Dynamic Adsorption

“…A broad band centered on 3434.55 cm −1 was assigned to the -OH stretching vibration of H-O-H between montmorillonite layers, which was caused by the adsorption of water between the bentonite layers. The peak at 1633.24 cm −1 was attributed to COO − bending vibration, which belongs to the presence of alginate in granules [ 30 ]. The peak at 1042.22 cm −1 corresponding to Si-O-Si stretching vibration in the montmorillonite lattice and the peak at 790.83 cm −1 assigned to Al-O-Si bending vibration between montmorillonite layers were observed on GBt and GOMBt.…”

Structural, Optical, Magnetic and Photocatalytic Properties of Zn Doped CoFe2O4 Decorated Bentonite Nanocomposites

“…[37][38][39][40] In addition, clays can be used as a good matrix to fabricate magnetic nanoparticles because of their specific physicochemical properties, high cation exchangeability, and thermal stability. [41] Among the clay minerals, natural bentonite is one of the most functional mineral clays with its low cost, abundant accessibility, superior swelling ability, superior absorption capacity and environmentally friendly properties. [42] Both the aggregation of magnetic materials and maximizing the financial benefits of the clay mineral bentonite may be achieved by using it as a platform in magnetic materials.…”