Solid phase extraction and removal of 2,4-dichlorophenol from aqueous samples using magnetic graphene nanocomposite

ABSTRACT

A magnetic graphene nanocomposite (Fe₃O₄-GNC) was prepared and used for the solid phase extraction (SPE) and removal of 2,4-dichlorophenol from aqueous solutions. The physicochemical properties were investigated using SEM, EDX, FTIR, and TGA. Different factors affecting sorption capacity were studied systematically. Results for kinetics studies revealed that 2,4-dichlorophenol sorption followed pseudo-second-order kinetics and the q_e value (987.45 mg/g) was in close agreement with experimental value (1000 mg/g). Thermodynamic study showed that the sorption is endothermic (∆Hº = +56.116 kJ/mol) and spontaneous. The desorption studies were carried out for the reusability and extraction of 2,4-dichlorophenol from aqueous samples and 94% recoveries were obtained. The method was found feasible for the removal and preconcentration of trace analysis of 2,4-dichlorophenol in environmental water samples.

KEYWORDS:

• 2,4-Dichlorophenol
• magnetic graphene nanocomposite
• preconcentration
• solid phase extraction

Supplemental data

Supplemental data for this article can be accessed on the publisher’s website.