Adsorptive performance of aminoterephthalic acid modified oxidized activated carbon for malachite green dye: mechanism, kinetic and thermodynamic studies

ABSTRACT

In this study, aminoterephthalic acid (ATPA) modified oxidized activated carbon (AC) was prepared (AC@ATPA). The (AC@ATPA) composite was applied for removal of malachite green (MG) from aqueous medium. The obtained AC@ATPA composite was characterized by varying techniques such as TGA, FTIR, SEM, EDX, XRD and zeta potential. The results reveal that the optimum parameter conditions for the maximum MG dye ions adsorption were found to be pH- 6, adsorbents amount-30 mg, equilibrium time reached within 240 min at initial concentration 20 mg/L and room temperature. The adsorption process fitted well with Langmuir isotherm and pseudo-first-order kinetic model with the maximum adsorption capacities for MG of 188.7 mg/g.

KEYWORDS:

• Aminoterephthalic acid
• modification
• mechanism
• isotherm
• adsorption
• malachite green

Disclosure statement

The author declares no competing financial interest

Novelty Statement

Herein, a new and low cost (AC@ATPA) composite was synthesized by anchoring aminoterephthalic acid (ATPA) to oxidized activated carbon (AC). The (AC@ATPA) composite was applied for removal of malachite green (MG) from aqueous medium. The results reveal that the AC@ATPA was an effective efficient adsorbent for eliminating of MG dye ions from aqueous medium. The maximum adsorption capacity was188.7 mg/g. The desorption results showed that the best recovery of MG dye ions adsorption by using 0.1M HCl.

Additional information

Funding

This project was supported by the Deanship of Scientific Research at Prince Sattam Bin Abdulaziz University under the research project [No11257].