Chitosan nanoparticles on a natural zeolite as an efficient adsorbent for Congo red

2nd International Conference on Current Progress in Functional Materials 2017

Yulizar, Y.^1 ; Utari, T.^1 ; Apriandanu, D.O.B.^1 ; Putri, Y.R.P.^1

Department of Chemistry, Faculty of Mathematics and Natural Sciences (FMIPA), Universitas Indonesia, Depok

16424, Indonesia^1

关键词: Adsorption capacities;    Chitosan nanoparticles;    Congo red;    Conventional methods;    Fourier transform infra reds;    Freundlich adsorption isotherms;    Natural zeolites;    Pseudo-second-order kinetic models;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/496/1/012005/pdf
DOI  :  10.1088/1757-899X/496/1/012005

来源: IOP

【 摘 要 】

Congo red is a toxic synthetic dye that cannot be readily degraded by conventional methods, thus posing a risk to the environment. The increased use of this dye is mainly due to developments in the textile industry. A possible way to reduce the Congo-red waste is by performing the adsorption processes; therefore, in this study, we used a natural zeolite from Bayah and modified it using chitosan nanoparticles (Na-zeolite@chitosan) to increase its adsorption capacity. The obtained Na-zeolite@chitosan material, which was able to efficiently adsorb Congo red, was further characterized by ultraviolet-visible (UV-Vis) and Fouriertransform infrared (FTIR) spectroscopy as well as by transmission electron microscopy (TEM). A maximum of 98.019% of the Congo red was adsorbed at a concentration of 800 ppm and a pH of 5 for 60 min (the adsorption capacity was 0.00428 mmol/g). Our results exhibit that Congo red adsorption on Na-zeolite@chitosan follows the Freundlich adsorption isotherm and can be described using a pseudo-second-order kinetic model.