Adsorption characteristics of 2,4-dichorophenoxy acetic acid onto surfactant modified titania nanoparticles

Dung Le Thi, Loan Nguyen Quynh, Thang Nguyen Duc, Son Le Thanh, Duc Pham Tien

Abstract


The present study investigated adsorption of 2,4-dichorophenoxy acetic acid (2,4-D) on titania (TiO2) nanoparticles with surface modification by cationic surfactant, cetyltrimethylammonium bromide (CTAB). Titania nanoparticles which were successfully synthesized by sol-gel method, were characterized by X-ray diffraction (XRD) and Transmission electron microscopy (TEM). Surface modification of TiO2 with CTAB enhanced the removal of 2,4-D significantly. Some effective conditions affect to the removal of 2,4-D using CTAB modified TiO2 such as pH and adsorbent dosage were systematically studied and found to be 5 and 10 mg/mL, respectively. Adsorption mechanisms of 2,4-D onto CTAB modified TiO2 was suggested based on the change in surface charge after adsorption.

Keywords


Adsorption; 2,4-D; titania; nanomaterial; CTAB

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References


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DOI: https://doi.org/10.51316/jca.2021.061

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