Comparative study on ultrasonic assisted adsorption of Basic Blue 3, Basic Yellow 28 and Acid Red 336 dyes onto hydromagnesite stromatolite: kinetic, isotherm and error analysis

KARAKUŞ S., Tasaltin N., Tasaltin C., Kilislioglu A.

SURFACES AND INTERFACES, cilt.20, 2020 (SCI İndekslerine Giren Dergi) identifier identifier


In this study, we focused on the performance of an adsorbent such as a hydromagnesite stromatolite (HS) for rapid and efficient ultrasonic-assisted adsorption of Basic Blue 3, Basic Yellow 28 and Acid Red 336 dyes from aqueous solution. The initial dye concentration (0.05-0.10 g/L), adsorbent dose (0.1-0.5 g), pH (2-10), and temperature (20-40 degrees C) were evaluated. HS was characterized by means of BET, FTIR, SEM, and XRD. The surface area was observed to be 20.12 m(2)/g for HS. Different kinetic models, isotherm models (Langmuir, Freundlich, Temkin, Dubinin-Radushkevich, Redlich-Peterson, Frumkin, Harkins - Jura, Halsey and Henderson) and error analysis were calculated to explain the adsorption mechanism of dye on the surface of HS. The kinetic parameters of adsorption of all dyes were well-defined by the pseudo-second-order with R-2 of 0.984-1.000 while the thermodynamic parameters demonstrated endothermic and feasible nature of the adsorption with Delta H-o of 24.6-45.1 kJ/mol and Delta S-o of 109.4-322.5 J/mol K. The uptake (%) values of HS for BB3, BY28 and AR336 were %31, %50, and %91, respectively. An eco-friendly and low-cost HS for removal of dyes from the aqueous solution within 100 s - 1200 s; HS was proposed in wastewater treatment.