期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 183, 期 1-3, 页码 506-511出版社
ELSEVIER
DOI: 10.1016/j.jhazmat.2010.07.052
关键词
VOCs; Complex material; Unsaturated degree; Absorption
资金
- Fundation for University of Dongguan City, Nature Science Foundations of China [50578163,20877025]
- Special Foundation of Sun Yat-Sen University
- Science and Technology Research Programs of Guangdong Province [0711220600311]
- Nature Science Key Foundations of Guangdong Province [92510027501000005]
Three kinds of expanded graphite-based complex materials were prepared to absorb toluene by dispersing plant oil, animal oil and mineral oil on the surface of expanded graphite, respectively. These complex materials were characterized by scanning electronic micrograph. contact angle meter and Brunauer-Emmett-Teller surface area. And their absorption capacities for toluene were comparatively investigated. The results showed that the surfaces of the three types of sorbents were very hydrophobic and nonporous, but they all had excellent absorption capacities for toluene. And their absorption capacities were proportional to the toluene concentration in streams and decreased differently with increasing the absorption temperature. It was noteworthy that the absorption capacities varied with the unsaturated degree of the complex materials and kept unchanged under different relative humidities of streams. Moreover, the regeneration experiments showed that after 15-run regeneration the absorption capacities of expanded graphite modified by mineral oil almost kept unchanged, while that of expanded graphite loaded plant oil and animal oil dropped by 157 and 93.6 mgg(-1), respectively. The losses of their absorption capacities were ascribed to the destruction of their unsaturated carbon bounds. (C) 2010 Elsevier B.V. All rights reserved.
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