| Abstract |
| In this study, we used clinoptilolite, which is a natural zeolite and abundant in Korea, as an absorbent material to treat the tar-containing wastewater, which generated from a biomass gasification plant. The clinoptilolite was synthesized with the Mg/Al double hydroxide (LDH) to maximize the adsorption ability. The chemical species in the tar-containing wastewater was analyzed to find a more effective way of the wastewater treatment. Seventeen chemical species were detected from the analysis, and they were classified into three large groups: (1) phenols, (2) guaiacols, and (3) carbohydrates. There were 7.0 - 16.0% of the adsorption efficiency improvement in all chemical species by using the MG/AL-LHD synthesized clinoptilolite. The phenol components, among the three species, had the highest removal rate, 92%, and it is the 16% improvement of the adsorption efficiency by using the Mg/Al-LDH impregnation on clinoptilolite. In the case of o-cresol as well, 88% was removed, showing the improvement of removal efficiency by 15.8 %. Therefore, if Mg/Al-LHD is impregnated to natural zeolites, there will be the positive effect when treating tar-containing wastewater. In addition, the results of the phenol isothermal adsorption experiment were better explained with the monomolecular adsorption properties of the Langmuir adsorption formula rather than with the Freundlich isothermal adsorption formula. |
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| Key Words |
| Cinoptilolite, Mg/Al-LDH, Natural zeolite, Phenols, Wood tar |
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