Evaluation of absorption efficiency of Zeolite ZSM-5 in the removal of styrene vapors
Author(s):
Abstract:
Background
Volatile organic compounds (VOCs) are one of the most important and prevalent air pollutants. The vapor produced as a result of the vaporization ýof these compounds, even at very low concentrations, is harmful to the environment and human health. Thus, the aim of this study was to evaluate the removal of styrene vapor from the air flow using Zeolite ý(ZSM-5) in a continuous flow reactor.Materials And Methods
This cross-sectional study was conducted at a laboratory scale. Styrene concentrations of 200 and 300 ppm were selected for this study and steam saturation method was used to obtain the desired ýdynamic concentration. The desired concentration of dynamic styrene vapor was prepared in a fireproof cubic continuous flow reactor (canopy). ZSM-5 was synthesized and ground in a flat steel plate with standard mesh number of 20-40 and was used to remove the styrene vapors. In order to evaluate the removal efficiency, two variables of time and initial concentration of pollutant were investigated. In addition, scanning electron microscopy (SEM), X-ray powder diffraction (XRD), the BrunauerEmmettTeller (BET) technique, and energy-dispersive X-ray spectroscopy (EDX) were used to investigate the surface and quality of the obtained adsorbent.Results
The results of SEM and XRD indicated the uniform surface and high purity of the synthesized zeolite. Adsorption breakthrough and saturation for 200 ppm of styrene concentration occurred in the first 35 and 510 minutes of the experiment, and for 300 ppm of styrene concentration, occurred 23 and 385 minutes after the beginning of the test, respectively,.Conclusions
ZSM-5 showed a high level of efficiency in the removal of styrene vapors from polluted air; thus, it can be used to remove this pollutant from large industrial environments.Keywords:
Language:
English
Published:
Journal of Occupational Health and Epidemiology, Volume:5 Issue: 1, Winter 2016
Pages:
10 to 19
magiran.com/p1647008
دانلود و مطالعه متن این مقاله با یکی از روشهای زیر امکان پذیر است:
اشتراک شخصی
با عضویت و پرداخت آنلاین حق اشتراک یکساله به مبلغ 1,390,000ريال میتوانید 70 عنوان مطلب دانلود کنید!
اشتراک سازمانی
به کتابخانه دانشگاه یا محل کار خود پیشنهاد کنید تا اشتراک سازمانی این پایگاه را برای دسترسی نامحدود همه کاربران به متن مطالب تهیه نمایند!
توجه!
- حق عضویت دریافتی صرف حمایت از نشریات عضو و نگهداری، تکمیل و توسعه مگیران میشود.
- پرداخت حق اشتراک و دانلود مقالات اجازه بازنشر آن در سایر رسانههای چاپی و دیجیتال را به کاربر نمیدهد.
In order to view content subscription is required
Personal subscription
Subscribe magiran.com for 70 € euros via PayPal and download 70 articles during a year.
Organization subscription
Please contact us to subscribe your university or library for unlimited access!