Adsorption studies of Cibacron Blue onto both untreated and chemically treated pistachio shell powder from aqueous solutions

ABSTRACT

In order to enhance its adsorption properties, pistachio shell powder was modified first with aqueous HCl solution and then with aqueous NaOH solution. The adsorption of Cibacron Blue dye onto both untreated and chemically treated pistachio shell powder was investigated using a batch adsorption technique. The parameters affecting the adsorption process, namely contact time, pH, adsorbent dose, and initial dye concentration were examined. For both adsorbents, the dye adsorption was favored under acidic conditions (pH 2–3). Equilibrium adsorption isotherm and kinetic studies showed that Langmuir isotherm and the pseudo-second-order kinetic model fitted well to the experimental data.

KEYWORDS:

• Pistachio shell powder
• textile dye
• adsorption
• isotherm
• kinetics

Acknowledgments

The author is thankful to Gaziantep University for providing basic equipment facilities and an amicable environment for research activities. This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.

Novelty statement

This study focused on developing a novel efficient adsorbent from pistachio biomass and testing this adsorbent in the dye removal from aqueous solutions. As far as the author is aware, there is no work carried out on the adsorption of Cibacron Blue dye onto pistachio shell powder. Many researchers modified pistachio shell powder in order to use them as an adsorbent in their work. Though there is similar work, in the present work, we report, for the first time, a comprehensive FT-IR analysis of pistachio shell powder before and after chemical treatment which shows the degradation of mostly hemicellulose and cellulose constituents of the biomass and the preservation of lignin constituent of the biomass during to the chemical treatment.

Correction Statement

This article has been republished with minor changes. These changes do not impact the academic content of the article.