(a) Acenaphthylene
(b) Phenanthrene
(c) Pyrene
(d) Dimethyl phthalate
(e) Diethyl phthalate
(f) Dibutyl phthalate
Figure 2: Change in concentration of (a) acenaphthylene, (b) phenanthrene, (c) pyrene, (d) dimethyl phthalate, (e) diethyl phthalate, and (f) dibutyl phthalate during filtration test (applied pressure: 500 kPa).