Adsorption of a textile dye “Indanthrene Blue RS (C.I. Vat Blue 4)” from aqueous solutions onto smectite-rich clayey rock

• Published in: Journal of hazardous materials Vol. 172; no. 2; pp. 1623 - 1628
• Main Authors: Chaari, Islem, Feki, Mongi, Medhioub, Mounir, bouzid, Jalel, Fakhfakh, Emna, Jamoussi, Fakher
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier B.V 30.12.2009; Elsevier
• Subjects: Activated clay; Adsorbents; Adsorption; Aluminum Silicates - chemistry; Applied sciences; Chemical engineering; Coloring Agents - isolation & purification; Contact; Dyes; Exact sciences and technology; Freundlich; Hydrogen-Ion Concentration; Langmuir; Pollution; Rock; Silicates - chemistry; Solutions; Surface chemistry; Temperature; Textile dye; Textiles; Water Pollutants, Chemical - isolation & purification; Water Purification - methods; Freundlich; Activated clay; Adsorption; Textile dye; Langmuir; Water treatment; Dyes; Adsorption isotherm; Adsorption capacity; Temperature effect; Specific surface area; Retention; X ray diffraction; Cation exchange capacity; Batchwise; Smectite; pH; Rocks; Aqueous solution; Textile industry
• ISSN: 0304-3894; 1873-3336
• DOI: 10.1016/j.jhazmat.2009.08.035

The adsorption of a textile dye, namely, Indanthrene Blue RS (C.I. Vat Blue 4) onto smectite-rich clayey rock (AYD) and its sulphuric acid-activated products (AYDS) in aqueous solution was studied in a batch system with respect to contact time, pH, and temperature. The adsorbents employed were characterized by X-ray diffraction, infrared spectroscopy and specific surface area, cation exchange capacity and point of zero charge were also estimated. The effect of contact time on dye adsorption showed that the equilibrium was reached after a contact time of 40 min for the both adsorbents. The optimum pH for dye retention was found 6.0 for AYDS and 7.3 for AYD. The equilibrium adsorption data were analysed using the Langmuir and Freundlich isotherms. The adsorption capacities ( Q m ) for AYD and AYDS were found 13.92 mg/g and 17.85 mg/g, respectively. The effect of temperature on the adsorption was also investigated; adsorption of Indanthrene Blue RS is an endothermic process. This study demonstrates that all the considered adsorbents can be used as an alternative emerging technology for water treatment.