Fibrous adsorbent for removal of aqueous aromatic hydrocarbons.
Bundles of a strongly hydrophobic fibrous material (p-phenylene-2,6-benzobisoxazole; PBO; Zylon) were employed as an adsorbent for the removal of aqueous aromatic compounds, because the PBO fibers are too rigid to be woven and did not entrap suspended solids. The removal performance for nine kinds of polyaromatic hydrocarbons (PAHs) and di-(2-ethylhexyl) phthalate (DEHP) was evaluated. PAHs and DEHP at initial concentrations of 50 microg L(-1) were removed at 72.5-99.9% and ca. 95%, respectively, although the removal efficiencies were affected by the phase ratio (fiber weight/solution volume). The logarithm of the partition coefficient (log K) for planar PAHs was linearly correlated with the logarithm of the n-octanol/water partition coefficient (log P), but nonplanar PAHs, such as cis-stilbene, p-terphenyl, and o-terphenyl, showed significantly lower adsorption performance. The adsorbed PAHs were not desorbed effectively with CH3CN, CH2Cl2, and toluene. On the other hand, DEHP was effectively desorbed with methanol.
Jung
Yong-Jun
YJ
Department of Ecological Engineering, Toyohashi University of Technology, Tempaku-cho, Toyohashi 441-8580, Japan.
Kiso
Yoshiaki
Y
Oguchi
Tatsuo
T
Yamada
Toshiro
T
Takagi
Hiroo
H
Nishimura
Kazuyuki
K
D000327:Adsorption; D004051:Diethylhexyl Phthalate / Q000737:chemistry; D006841:Hydrocarbons, Aromatic / Q000737:chemistry* / Q000302:isolation & purification*; D000432:Methanol / Q000737:chemistry; D015394:Molecular Structure; D013267:Stilbenes / Q000737:chemistry; D013730:Terphenyl Compounds / Q000737:chemistry; D014050:Toluene / Q000737:chemistry
D006841:Hydrocarbons, Aromatic; D013267:Stilbenes; D013730:Terphenyl Compounds; D014050:Toluene; D004051:Diethylhexyl Phthalate; D000432:Methanol