Synthesis of high-saturation magnetization composites by montmorillonite loading with hexadecyl trimethyl ammonium ions and magnetite nucleation for improved effluent sludge handling and dye removal

BARRAQUÉ, FACUNDO; MONTES, MARÍA L.; FERNÁNDEZ, MARIELA A.; MERCADER, ROBERTO C.; CANDAL, ROBERTO J.; TORRES SÁNCHEZ, ROSA M.

APPLIED PHYSICS. A - MATERIALS SCIENCE AND PROCESSING

SPRINGER

Año: 2020 vol. 126

0947-8396

Organomagnetic clays have been designed and synthesized from montmorillonite loaded with hexadecyl trimethyl ammonium ions (HDTMA+), to be used in water treatment systems to minimize the direct manipulation of effluent sludge dyes. The structural, magnetic, and hyperfine properties have been determined using thermogravimetric analysis, X-ray diffraction, scanning electron microscopy, zeta potential measurement, Mössbauer spectroscopy, and a vibrating sample magnetometer. The Methylene blue and Ponceau 4R (P4R) removal efficiency has been analyzed in batch conditions. The 58% HDTMA+-loaded composite exhibits a saturation magnetization three times higher than the composite without HDTMA+, while the surfactant incorporation improved P4R adsorption. The proper HDTMA+ loading improves the saturation magnetization and the adsorption capacity of the composites, thus yielding added-value materials from two points of view, magnetic response and dye adsorption capacity.