Purification of textile waste by extracting harmful contaminants using a bio-porous sorbent derived from Moroccan Pistacia lentiscus

Abstract

The increasing problem of water contamination worldwide highlights the critical need to introduce environmentally-friendly treatment approaches. This study focuses on the use of powdered Pistacia lentiscus leaves as a highly effective adsorbent for removing crystal violet dye from textile waste. The bio-adsorbent were examined using SEM/EDX, FT-IR techniques. The process optimization showed that 98.25 % of cristal violet could be eliminated in 60 min at a pH 7.1 using 30 mg of 80 µm biosorbent. Analysis of kinetic and isothermal data for dye removal by L@PL powders revealed a better fit with the pseudo-second-order (PSO) kinetic model and the Freundlich isotherm model, respectively. The Freundlich isotherm model exhibited a strong fit, highlighting a maximum monolayer adsorption capacity of 93.03 mg g −1 at 25 °C. Thermodynamic studies revealed that dye uptake was mainly affected by physisorption and exhibited characteristics of spontaneity and endothermic behavior. Electrostatic interactions, π-π interactions and hydrogen bonds are among the mechanisms responsible for dye adsorption on biomass leaves. The use of naturals resources as bio-adsorbent, recognized for their abundance and cost-effectiveness, and environmentally friendly material for removing cationic dyes in the current study.