کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6969183 | 1453016 | 2018 | 32 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Kinetic and equilibrium modelling of MTBE (methyl tert-butyl ether) adsorption on ZSM-5 zeolite: Batch and column studies
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
بهداشت و امنیت شیمی
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چکیده انگلیسی
The intensive use of methyl tert-butyl ether (MTBE) as a gasoline additive has resulted in serious environmental problems due to its high solubility, volatility and recalcitrance. The feasibility of permeable reactive barriers (PRBs) with ZSM-5 type zeolite as a reactive medium was explored for MTBE contaminated groundwater remediation. Batch adsorption studies showed that the MTBE adsorption onto ZSM-5 follows the Langmuir model and obeys the pseudo-second-order model with an adsorption capacity of 53.55â¯mgâ¯gâ1. The adsorption process reached equilibrium within 24â¯h, and MTBE was barely desorbed with initial MTBE concentration of 300â¯mgâ¯Lâ1. The mass transfer process is found to be primarily controlled by pore diffusion for MTBE concentrations from 100 to 600â¯mgâ¯Lâ1. pH has little effect on the maximum adsorption capacity in the pH range of 2-10, while the presence of nickel reduces the capacity with Ni concentrations of 2.5-25â¯mgâ¯Lâ1. In fixed-bed column tests, the Dose-Response model fits the breakthrough curve well, showing a saturation time of â¼320â¯min and a removal capacity of â¼18.71â¯mgâ¯gâ1 under the conditions of this study. Therefore, ZSM-5 is an extremely effective adsorbent for MTBE removal and has a huge potential to be used as a reactive medium in PRBs.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hazardous Materials - Volume 347, 5 April 2018, Pages 461-469
Journal: Journal of Hazardous Materials - Volume 347, 5 April 2018, Pages 461-469
نویسندگان
Yunhui Zhang, Fei Jin, Zhengtao Shen, Rod Lynch, Abir Al-Tabbaa,