Humic acid (HA) is very important natural material in soil fertility, transport of pollutants, sediments, and in natural waters due to the different functional groups which are capable of binding to metal ions, mineral surfaces and organic contaminants. Due to the phenolic and carboxylic acid groups in the natural humic acid subtances, the surface charge and the reactivity of HA is mainly variable depending on the medium and the nature of HA. In this investigation, novel humic acid hydrogel particles were prepared in a single step via a water-in-oil microemulsion system employing different crosslinkers as divinylsulfone, glutaraldehyde, epichlorohydrine, and adipoyl chloride. Scanning electron microscopy (SEM), dynamic light scattering (DLS), zeta potential measurement were used for the characterization of humic acid particles size, charge, and morphology. Thermal and structural properties of the crosslinked humic acid particles were evaluated by thermogravimetric analysis (TGA) and FT-IR spectroscopy.

Humic acid particles: Synthesis and characterization

245th National Meeting (2013)

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