Synthesis and characterization of organoclays based on bentonite and TOAB, HDAB surfactants: application for glyphosate removal
DOI:
https://doi.org/10.60923/issn.2281-4485/24590Keywords:
Bentonite, surfactants, environment, glyphosate, wastewaterAbstract
Inappropriate use by agriculture and industry has led to contamination by glyphosate (GPH), which is toxic to human health, life and the environment. GPH is eliminated by the adsorption process of organoclay composites. To synthesize organoclays, the cationic surfactants hexadecyltrimethylammonium bromide (HDAB) and trimethyloctadecylammonium bromide (TOAB) were combined with bentonite clay materials. The structural properties of the materials were studied by FTIR, XRD, SEM-EDX, BET surface and pHpzc. The batch process was carried out with the following parameters: pH, contact time, temperature, initial concentration and comparative doses of bentonite and the two composite materials. However, the X-ray diffraction patterns of the surfactant-modified TOAB- Bent and HDBA-Bent composites revealed an increase in basal spacing. The sorption capacity of GPH in TOAB-Bent and HDBA-Bent increased with the loading level of TOAB or HDAB, while the sorption efficiency of GPH was produced by the hydrophobic phases formed by surfactants, with hydrophobic partitioning being the critical process. Therefore, the addition of bentonite and surfactants can significantly improve glyphosate removal from aqueous solutions.
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