Preparation and characterization of a composite based on polyaniline, polypyrrole and cigarette filters: adsorption studies and kinetics of phenylbutazone in aqueous media

Abstract

Understanding the adsorption mechanisms of drugs on the surfaces of solid materials is important for determining the fate of these compounds in aqueous samples as water or wastewater treatment. A composite based on polyaniline (PAni), polypyrrole (PPy) and cigarette filters (CFs), PAni-PPy-CFs, was prepared, characterized by FTIR, TGA and SEM and applied in investigation of adsorption of a non-steroidal anti-inflammatory, phenylbutazone (PBZ), from aqueous solutions. A batch of experiments were conducted and four kinetic models and five isotherms models were used to describe the adsorption process. The experimental kinetic data were fitted very well with the second-order kinetic model, indicating that PBZ adsorption involves chemical adsorption in different binding sites, which could control the reaction rate. The equilibrium adsorption data were best fitted with the dual-site Langmuir-Freundlich isotherm, with maximum adsorption capacity of 100.22 mg g -1 , which recognizes the existence of two kinds of adsorption sites on the polymer composite surface. Finally, this composite might act as excellent adsorbents for environmental and analytical processes, for example, stationary phases in separation processes.

Polyaniline-deposited cellulose fiber composite prepared via in situ polymerization: enhancing adsorption properties for removal of meloxicam from aqueous media

“…The theoretical adsorption capacity for MLX onto PAni, CF and the PAni-CF composite is comparable with other adsorbents reported in the literature, such as those shown in Table 3. 48,[54][55][56][57][58][59] The material that showed the best adsorption capacity was a PAni/cellulose acetate membrane adsorbing Hg 2+ ions (280.1 mg g À1 ) 57 and the material with second best adsorptive capacity was the PAni-CF (169.9 mg g À1 ) developed in this work. In the literature, there is a MLX adsorption study using MIP@Fe 3 O 4 58 as adsorbent material, and its adsorption capacity (88.0 mg g À1 ) and only work involving PAni-PPY-CFs 59 composite to adsorb another drug, phenylbutazone (100.22 mg g À1 ), but both works obtained lower adsorption capacities than the PAni-CF composite prepared in this work.…”

“…19,20 Actually, it is desirable to monitor and to develop analytical methodologies to detect and control the presence of pharmaceuticals in very different kinds of samples, for example waste water, urine, serum or plasma, most of which are very complex matrices. 21,22 Thus the development of new adsorbent materials to employ in techniques of sample extraction is highly desired.…”

Fe(III)‐Functionalized Magnetic Covalent Organic Frameworks for Fast Adsorption and Removal of Phenylbutazone in Aqueous Solution

“…Thus, the model indicates that adsorption interactions can occur with different affinities on both homogeneous and heterogeneous sites of adsorbents. [17,64] In this case, it can be inferred that there are multiple types of the adsorption sites onto the surface of MCOF (Fe) possibly, such as metal ions and benzene rings. MCOF(Fe) adsorbs phenylbutazone with different layers plausibly.…”

“…It can be seen that electrostatic interaction is one of the mechanisms for the sorption of phenylbutazone on MCOF(Fe). [17]…”

“…Some studies have been performed to remove phenylbutazone in aqueous solution using novel composites. [16,17] Although diverse routine strategies such as coagulationflocculation, biodegradation, photo-degradation, chlorination, and ozonation, have been proposed to remove NSAIDs, no one has been shown to be successful due to several demerits like energy consumption or some residual by-products. [18][19][20][21][22] Therefore, as a simple and effective method to remove NSAIDs with lowest energy consumption and cost, adsorption has attracted great attention.…”