Open AccessStudy of Adsorption-Desorption Au(III) Using Imprinted Ionic Material (SiO2 (RHA-BGS)-TMPDT-Au-Imp)
Author(s) -
F. R. Prasetyaningrum,
Sri Hastuti,
Sayekti Wahyuningsih,
Tri Martini
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/858/1/012043
Subject(s) - adsorption , desorption , fourier transform infrared spectroscopy , selectivity , ionic bonding , freundlich equation , chemistry , ionic strength , nuclear chemistry , inorganic chemistry , chemical engineering , ion , aqueous solution , organic chemistry , catalysis , engineering
Research on the adsorption of desorption of Au (III) metal using imprinted ionic SiO 2 (RHA-BGS) -TMPDT-Au-Imp material has been carried out. In this research, silica source (SiO 2 ) from rice husk ash (RHA) and bagasse (BGS) was modified through imprinted ionic technique. Adsorption studies include variations in concentration and selectivity while desorption studies include time variations. Furthermore, the adsorption and desorption processes were characterized using FTIR. The results of the adsorption process followed the Freundlich isotherm model with an adsorption capacity of 981,672 mg/g. The adsorption selectivity shows that the imprinted ionic material (SiO 2(RHA-BGS) -TMPDT-Au-Imp) is more selective than the material without imprinted ionic (SiO 2 (RHA-BGS) –TMPDT). The order of selectivity is Au(III)/Zn(II)> Au(III)/Fe(III)> Au(III)//Cu(II). Study of desorption kinetics Au(III) followed the zero order kinetics. The results of the FTIR show that there are still O-H, C-H and -NH groups. This indicates the imprinted ionic material (SiO 2(RHA-BGS) -TMPDT-Au-Imp) is not damaged.