Adsorption of Formaldehyde From Using Bone Char Modified With Acetic Acid Publisher



Rezaee A¹ ; Rangkooy HA¹ ; Jonidijafar A² ; Soltani RC¹ ; Nejahmadabadi A¹
Source: Journal of Environmental Science and Engineering Published:2016

Abstract

The aim of this study was to evaluate the adsorption performances of modified bone char (BC) with acetic acid for formaldehyde removal from polluted air. The porous structure, surface characteristics and functional groups involving in the formaldehyde adsorption were analyzed using Brunauer-Emmett- Teller (BET), Scan Electron Microscope (SEM) equipped with energy dispersive X-ray (EDX) and Fourier transform infrared spectroscopy (FITR) analysis, respectively. It was shown that the modified BC yielded specific surface area and pore volume higher than that of the original BC. The maximum values of the BET for BC and modified BC were 105.24 and 118.58 m2/g, respectively. The b 1 IK spectra of modified BC before and after formaldehyde adsorption indicated that the bands associated with the hydroxyl and carboxyl groups of BC surface, played a significant role in formaldehyde adsorption onto modified BC. Moreover, the results showed the breakthrough, equilibrium time and adsorption capacity of modified bone char were longer than that of BC. With the increase of formaldehyde concentration from 20 to 200 ppm, the adsorption capacity (as mg/g) increased from 154.43 to 275.78 for formaldehyde adsorption. It seems the adsorption capacity of modified BC for removal of formaldehyde depends on both physical and chemical properties. These results showed that the modified BC can be used as an efficient adsorbent for formaldehyde removal. © 2016, National Environmental Engineering Research Inst.. All rights reserved.