Application of polypyrrole coated onto wood sawdust for the removal of carmoisine dye from aqueous solutions

• Published in: Journal of applied polymer science Vol. 122; no. 2; pp. 804 - 812
• Main Authors: Ansari, Reza, Keivani, Mohammad Banimahd, Delavar, Ali Fallah
• Format: Journal Article
• Language: English
• Published: Hoboken Wiley Subscription Services, Inc., A Wiley Company 15.10.2011; Wiley; Wiley Subscription Services, Inc
• Subjects: Adsorbents; Applied sciences; Aqueous solutions; carmoisine; Composites; desorption; Dyes; Exact sciences and technology; Forms of application and semi-finished materials; kinetics; Materials science; Mathematical models; Polymer industry, paints, wood; Polymers; polypyrrole; Polypyrroles; Sawdust; Sorption; Technology of polymers; Liquid solid adsorption; Aromatic polymer; Adsorption capacity; carmoisine; Experimental study; Composite particles; Modeling; sorption; Wood waste; Conducting polymers; polypyrrole; Kinetic model; Azo dye; Preparation; Kinetics; Adsorbent; Sawdust; desorption; Pyrrole polymer
• ISSN: 0021-8995; 1097-4628; 1097-4628
• DOI: 10.1002/app.34051

In this research, the removal of carmoisine dye from aqueous solutions using polypyrrole coated onto sawdust (PPy/SD) has been investigated. The sorption experiments were performed using both batch and column systems. The effects of some important parameters such as pH, initial concentration, sorbent dosage, exposure time, and temperature on uptake of carmoisine dye were investigated. Based on the data obtained in batch system, it was found that maximum adsorption is occurred under acidic conditions. Complete removal was observed when a dye solution with the initial concentration of 100 mg L−1 was treated by 1.0 g of the used adsorbent (PPy/SD) at pH value of 4 and room temperature. However, higher sorption was observed at elevated temperature. According to the kinetics study, it was found that the experimental data fitted very well the pseudo‐second‐order kinetic model (k2 = 0.184 g mg−1 min−1). It was found that polypyrrole chemically coated on SD is an efficient system for the removal of carmoisine dye from aqueous solutions. Desorption of the dye‐loaded column was also possible by using dilute NaOH solution with high efficiency (∼ 80%). © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011