# Evaluation of the Removal of Basic Blue 3 and Basic Yellow 28 Textile Dyes from Aqueous Media Using Persea americana ‘Hass’ Avocado Peel

## TL;DR

This study shows that avocado peels can effectively remove certain dyes from water, offering a sustainable solution for wastewater treatment.

## Contribution

The novel use of Hass avocado peels as biosorbents for cationic dyes in wastewater treatment is demonstrated.

## Key findings

- Avocado peels achieved 88.24% removal efficiency for Basic Yellow 28 dye under optimized conditions.
- Avocado peels achieved 99.71% removal efficiency for Basic Blue 3 dye under optimized conditions.
- Agricultural waste can be repurposed as a sustainable biosorbent for dye removal in wastewater treatment.

## Abstract

This study investigates the potential of Hass avocado peels as biosorbents for removing the cationic dyes BB3 and BY28 from aqueous solutions. The results demonstrate that agricultural waste can be effectively incorporated into sustainable, environmentally friendly wastewater treatment technologies. The adsorption parameters examined include adsorbent mass (0.1–1.1 g), dye concentration (5–50 mg/L), contact time (5–180 min), stirring speed (100–200 rpm), pH (4–10), and temperature (25–40 °C). UV-Vis spectrophotometric analyses show that the optimum conditions for BY28 removal are 0.3 g/50 mL adsorbent, 5 mg/L dye concentration, 30 min contact time, 200 rpm stirring speed, pH 7, and 40 °C, while those for BB3 are 1.1 g/50 mL adsorbent, 5 mg/L concentration, 45 min contact time, 150 rpm stirring speed, pH 7, and 40 °C. Under the optimized operating conditions, the maximum dye removal efficiencies were 88.24% for BY28 and 99.71% for BB3. This study demonstrates that agricultural waste can be converted into sustainable, reusable biosorbents for removing cationic dyes, thereby contributing to the development of environmentally friendly wastewater treatment technologies.