Removal of Eriochrome Black T (EBT) and Its Pb(II)-, Cu(II)-, and Zn(II)-Based Metal Complexes from Aqueous Solutions Using Spent Coffee Grounds: Part A – Characterization and Adsorption Isotherms

Ashraf  Al-Msiedeen; Rasheed M. A. Q.  Jamhour; Rand  Al-Faraheed; Muayad  Esaifan; Mohannad  Jamhour; Mustafa J.A.  Abualreish

doi:10.6180/jase.202602_29(2).0001

Removal of Eriochrome Black T (EBT) and Its Pb(II)-, Cu(II)-, and Zn(II)-Based Metal Complexes from Aqueous Solutions Using Spent Coffee Grounds: Part A – Characterization and Adsorption Isotherms

Ashraf Al-Msiedeen¹, Rasheed M. A. Q. Jamhour¹, Rand Al-Faraheed¹, Muayad Esaifan², Mohannad Jamhour³, and Mustafa J.A. Abualreish⁴This email address is being protected from spambots. You need JavaScript enabled to view it.

¹Department of Chemistry and Chemical Technology, Tafila Technical University, P.O. Box 179, Tafila- 66110, Jordan

²Department of Chemistry, Faculty of Arts and Science, University of Petra, Amman, Jordan

³Department of Clinical Medical Sciences (CMS), Faculty of Medicine, Yarmouk University, PO Box 566, Irbid- 21163, Jordan

⁴Department of Chemistry, College of Science, Northern Border University, Arar, Saudi Arabia

Received: January 14, 2025
Accepted: March 31, 2025
Publication Date: May 10, 2025

Copyright The Author(s). This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cited.

Download Citation: ||https://doi.org/10.6180/jase.202602_29(2).0001

The spent coffee grounds (SCG) waste was converted into an adsorbent through minimal washing. The efficiency of this low-cost adsorbent was evaluated based on its ability to remove the azo dye Eriochrome Black T (EBT) and its metal ion complexes from wastewater, which are commonly present in industrial effluents. Temperature, pH, contact time, adsorbent dose and initial dye concentration were among the variables that have been assessed by fixed bed column adsorption and a batch method. Brunauer-Emmett-Teller (BET) method BET, Fourier-transformed infrared (FTIR) spectroscopy, and scanning electron microscopy (SEM) were utilized for characterization. Elimination of EBT and their compounds was consistent with Freundlich isotherm form. At an equilibrium period, the adsorption ability of EBT was 4.95 mg/g; and that of the complexes [EBT-Pb(II)], [EBT-Cu(II)], and [EBT-Zn(II)] was 4.72, 4.70, and 4.53 mg/g, respectively.

Keywords: Adsorption; EBT; Coffee grounds; fixed-bed column; Wastewater; Langmuir isotherm

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