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Abstract:
Different zeolites were screened to achieve the aim of effective selective removal of p-xylene (PX) from the pure terephthalic acid (PTA) wastewater, and the ZSM-5 zeolite modified by NH4Cl was chosen as a suitable adsorbent because of the maximum equilibrium adsorption capacity and the largest selectivity factor. The selectivity factors of PX to Co2+ and PX to Mn2+ can attain 1778.069 and 1875.650, respectively, and the saturation adsorption capacity of PX even increases to 126.10 mg·g-1. First, the adsorption experiments were conducted at 298.15, 308.15, 318.15, and 328.15 K with the initial concentration of PX ranging from 50 to 180 mg·L-1 in a batch adsorber. The Langmuir model agreed better with the experimental results than did the Freundlich model. The adsorption parameters of thermodynamics are ΔS = -17.83 J·mol-1·K-1, ΔH = -12.33 kJ mol-1, and ΔG +-exchanged ZSM-5 zeolite was a highly efficient material for selectively adsorbing PX from PTA wastewater. (Figure Presented). © 2017 American Chemical Society.
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Journal of Chemical and Engineering Data
ISSN: 0021-9568
Year: 2017
Issue: 3
Volume: 62
Page: 1047-1057
2 . 1 9 6
JCR@2017
2 . 0 0 0
JCR@2023
ESI HC Threshold:226
JCR Journal Grade:2
CAS Journal Grade:3
Cited Count:
SCOPUS Cited Count: 5
ESI Highly Cited Papers on the List: 0 Unfold All
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Chinese Cited Count:
30 Days PV: 0
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