Adsorption and removal ability of magnetic pineapple peel biochar-Based for amoxicillin

Abstract

In this study, pineapple peel (PAP) was successfully modified into a novel magnetic biochar (M–BCPAP) by co-precipitating it with iron magnetic nanoparticles (MNP) for amoxicillin removal from aqueous solutions. Characterization of the synthesized M-BCPAP was carried out by scanning electron microscopy (SEM), X-ray diffraction (XRD), vibrating sample magnetometer (VSM) and Brunauer – Emmett – Teller (BET) surface analysis. The suitability of the adsorption of Amoxicillin (AMX) on M-BCPAP with Freundlich, Langmuir, and Temkin isotherm models was investigated and it was determined that the isotherm with the best fitness with adsorption was the Langmuir isotherm (R²=0.9998), which suggests single-layer adsorption. A maximum adsorption capacity of 18.6 mg/g was obtained with Langmuir isotherm. The pseudo-second-order kinetic model had a better fit with the best correlation to the kinetic data. Various adsorption parameters such as pH (2–6), initial AMX concentration (10–100 mg/L), amount of adsorbent (50–125 mg) and adsorption time (10–180 min) were investigated in the adsorption of AMX on M-BCPAP. As a result, the obtained data show that the synthesized magnetic biochar is a highly effective and low-cost, environmentally friendly alternative adsorbent in the removal of amoxicillin from aqueous solutions.

Graphical Abstract

Keywords:

• Magnetic biochar
• amoxicillin
• pineapple
• pharmaceutical waste

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

This work is supported by the Scientific Research Project Fund of Sivas Cumhuriyet University under the project number ECZ 072.