Author : Gongjingyi Hou
Publisher :
ISBN 13 :
Total Pages : 122 pages
Book Rating : 4.:/5 (113 download)
Book Synopsis Surface Modification of Activated Carbon for Efficient Removal of Fluorocarbon Gases by : Gongjingyi Hou
Download or read book Surface Modification of Activated Carbon for Efficient Removal of Fluorocarbon Gases written by Gongjingyi Hou and published by . This book was released on 2019 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fluorocarbon gases (fluorocarbons) are widely used in many fields such as, for the preparation of refrigerants, as a blood substitute and for inhaled anaesthetics. However, waste fluorocarbons may contribute to global warming and damage the ozone. Sevoflurane, which is a type of fluorocarbon, is generally used in hospitals as a kind of anaesthetic for many surgeries, patients need to inhale it for anaesthesia prior to surgeries. However, it is harmful to medical staff and patients to be exposed to a surrounding of anaesthetic gases (fluorocarbons) for prolonged periods of time, although many hospitals have scavenging systems. These waste anaesthetics are then released to the atmosphere, which can contribute to global warming. Thus, it is necessary to find an effective method to adsorb waste anaesthetic gases. Activated carbon (AC) is an excellent adsorbent that has been used for years to remove CO2, CO, NO, CH4 and metals from wastewater. Hence, it is thought that AC can be used to adsorb fluorocarbon gases. In order to improve the adsorption capacity of AC, surface modification methods can be used. In this study, HCl, NaOH and HNO3 at different concentrations, were used to treat activated carbon with different treatment times. Results found that, HCl and NaOH can improve the adsorption capacity of AC, with HCl-treated AC performing best. However, after HNO3 treatment, the adsorption capacity of AC decreased. The effect of concentration and treatment time on the adsorption capacity of AC is not very clear. Overall, HCl and NaOH are efficient modification methods to improve the adsorption capacity of activated carbon to fluorocarbons, but HNO3 is not.