The abundance of natural porous minerals and their low cost make them the potential adsorbents for VOCs (volatile organic compounds). In this paper, three natural minerals (diatomite, stellerite and vitric tuff) and their corresponding acid-treated minerals were used as adsorbents. The adsorption performances of minerals were investigated by the adsorption breakthrough curves of VOCs. The results indicated that the properties of organic compounds such as boiling point and polarity and the surface area and pore volume of minerals had obvious effects on the adsorption of VOCs over minerals. Increasing adsorption temperature and relative humidity would have negative effects on the VOC adsorption of minerals. The adsorption capacity of 2-heptanone over acid stellerite decreased by 7.2% as the temperature rose from 25 degrees C to 45 degrees C. The adsorption capacity of acid stellerite for 2-heptanone reduced by 60.9% when relative humidity increased from 0% to 75%. Minerals were tested for five adsorption-regeneration cycles to study the reusability. Better fittings of Thomas model, pseudo-first order kinetics model, and Freundlich model were showed in fitting the adsorption. Overall, porous minerals with high specific surface area and pore volume have promising prospect in VOCs adsorption.
机构:
Seoul Natl Univ Sci & Technol, Dept Environm Engn, Seoul 01811, South KoreaSeoul Natl Univ Sci & Technol, Dept Environm Engn, Seoul 01811, South Korea
Yang, Philje
Song, Mugeun
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Seoul Natl Univ Sci & Technol, Dept Environm Engn, Seoul 01811, South KoreaSeoul Natl Univ Sci & Technol, Dept Environm Engn, Seoul 01811, South Korea
Song, Mugeun
Kim, Daekeun
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Seoul Natl Univ Sci & Technol, Dept Environm Engn, Seoul 01811, South KoreaSeoul Natl Univ Sci & Technol, Dept Environm Engn, Seoul 01811, South Korea
Kim, Daekeun
Jung, Sokhee Philemon
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Chonnam Natl Univ, Dept Environm & Energy Engn, Gwangju 61186, South KoreaSeoul Natl Univ Sci & Technol, Dept Environm Engn, Seoul 01811, South Korea
Jung, Sokhee Philemon
Hwang, Yuhoon
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Seoul Natl Univ Sci & Technol, Dept Environm Engn, Seoul 01811, South KoreaSeoul Natl Univ Sci & Technol, Dept Environm Engn, Seoul 01811, South Korea
机构:
Univ Malaya, Fac Engn, Dept Chem Engn, Kuala Lumpur 50603, MalaysiaUniv Malaya, Fac Engn, Dept Chem Engn, Kuala Lumpur 50603, Malaysia
Pui, Wee Kong
Yusoff, Rozita
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Univ Malaya, Fac Engn, Dept Chem Engn, Kuala Lumpur 50603, MalaysiaUniv Malaya, Fac Engn, Dept Chem Engn, Kuala Lumpur 50603, Malaysia
Yusoff, Rozita
Aroua, Mohamed Kheireddine
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Sunway Univ, Sch Sci & Technol, CCDCU, Bandar Sunway, Selangor, Malaysia
Univ Lancaster, Dept Engn, Lancaster LA1 4YW, EnglandUniv Malaya, Fac Engn, Dept Chem Engn, Kuala Lumpur 50603, Malaysia