Analytical Methods in Environmental Chemistry Journal
AMECJ

A rapid removal of xylene from air based on nano-activated carbon in the dynamic and static systems and compared to commercial activated carbon before determination by gas chromatography

Document Type : Original Article

Authors

Mostafa jafarizaveh Jafarizaveh 1
Akram Tabrizi 2
Farideh Golbabaei 3

1 Gonabad University of Medical Sciences, Gonabad, Iran

2 MSc. of Occupational Health Engineering, lecturer, Health Faculty, Gonabad University of Medical Sciences, Gonabad, Iran

3 Department of Occupational Health, Faculty of Health, Tehran University of Medical Sciences,Tehran,,Iran.

https://doi.org/10.24200/amecj.v5.i03.196
Abstract
As main air pollutants, volatile organic compounds (VOCs) must be paid special attention. In this study, the removal efficiency of xylene from the air was investigated by nano-activated carbons (NACs) as an efficient adsorbent and compared to commercial activated carbons (ACs). In the chamber, the xylene vapor in pure air was generated, stored in the airbag (5 Li), and moved to adsorbents. Then, the xylene vapor was absorbed on the NAC/AC adsorbents and desorbed from it by a heat accessory. The efficiency of xylene removal with NACs and ACs was investigated in the dynamic and static systems based on 100-700 mg L-1 of xylene, flow rates of 100 ml min-1, and 100 mg of adsorbent at a humidity of 32% (25°C). Xylene concentrations were determined by gas chromatography equipped with a flame ionization detector (GC-FID).  In the batch system, the maximum absorption capacity for NACs and ACs was obtained at 205.2 mg g-1 and 116.8 mg g-1, respectively. The mean adsorption efficiency for NACs and ACs adsorbents was obtained at 98.5% and 76.55%, respectively. The RSD% for NACs ranged between 1.1-2.5% in optimized conditions. The characterizations of the NACs adsorbent showed that the particle-size range was between 35-100 nm.

Graphical Abstract

A rapid removal of xylene from air based on nano-activated carbon in the dynamic and static systems and compared to commercial activated carbon before determination by gas chromatography

Keywords

Xylene
Adsorption
Air
Nano activated carbon
Dynamic system
Gas chromatography
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Analytical Methods in Environmental Chemistry Journal
Volume 5, Issue 3
Summer 2022
Pages 19-30