Freundlich parameters for uptake of crude oil and dissolved organic carbon. The
Freundlich isotherm constants for the sorption of crude oil and dissolved organic
carbon by both sorbents indicated that the crude oil sorbed greater than the dissolved
organic carbon from weathered oil-contaminated seawatersorption.
In another study, high calcium fly ash from lignite combustion in electric power
plants was utilized as oil sorbent (Karakasi and Moutsatsou 2010). Particle size,
porosity, buoyancy ability and hydrophobicity are notable characteristics for oil spill
processes. For this purpose, an oil spill was simulated by artificial ocean water and
three different oils: heating oil, light crude oil, and Iranian light crude oil. To
investigate the effect of high calcium fly ash composition on the oilsorption capacity,
Ca-rich and Si-rich samples of high calcium fly ash were used. Sodium oleate,
C 17 H 33 COONa was selected as a surface active agent (surfactant) for modification
of high calcium fly ash, and the effect of this agent on the sorption behavior of high
calcium fly ash was investigated. The oilsorption capacities of high calcium fly ash
were 0.7–0.9 and 0.5–0.6 g/g for Ca-rich and Si-rich samples, respectively (in dry
media during 24 h). The oil was adsorbed in the high calcium fly ash pores and
formed a semi-solid phase with high calcium fly ash. Figure 12.37 compares the oil
uptake of Ca-rich sample and modified Ca-rich sample (with sodium oleate) for
heating oil, light crude oil, and Iranian light crude oil.
As seen from Fig. 12.37, the light crude oil and Iranian light crude oil made more
cohesive semi-solid phase than light viscous oil, heating oil. In addition, The Ca-rich
and Si-rich samples of high calcium fly ash had different oilsorption behaviors due to
greater hydrophobicity of Si-rich sample than the Ca-rich sample. But Ca-rich
Fig. 12.37 Comparison of oil uptake behavior of AD and SO-modified AD with ratio of HCFA:
SO ¼ 1: 0.004 for HO, LCO, and ILCO.SO: Sodium oleate, AD Ca-rich sample, HCFA high
calcium fly ash, HO heating oil, LCO light crude oil and ILCO Iranian light crude oil. Reprinted
with permission of (Surface modification of high calcium fly ash for its application in oil spill
cleanup, Karakasi and Moutsatsou, Elsevier)
448
M. Fatehi et al.
Freundlich isotherm constants for the sorption of crude oil and dissolved organic
carbon by both sorbents indicated that the crude oil sorbed greater than the dissolved
organic carbon from weathered oil-contaminated seawatersorption.
In another study, high calcium fly ash from lignite combustion in electric power
plants was utilized as oil sorbent (Karakasi and Moutsatsou 2010). Particle size,
porosity, buoyancy ability and hydrophobicity are notable characteristics for oil spill
processes. For this purpose, an oil spill was simulated by artificial ocean water and
three different oils: heating oil, light crude oil, and Iranian light crude oil. To
investigate the effect of high calcium fly ash composition on the oilsorption capacity,
Ca-rich and Si-rich samples of high calcium fly ash were used. Sodium oleate,
C 17 H 33 COONa was selected as a surface active agent (surfactant) for modification
of high calcium fly ash, and the effect of this agent on the sorption behavior of high
calcium fly ash was investigated. The oilsorption capacities of high calcium fly ash
were 0.7–0.9 and 0.5–0.6 g/g for Ca-rich and Si-rich samples, respectively (in dry
media during 24 h). The oil was adsorbed in the high calcium fly ash pores and
formed a semi-solid phase with high calcium fly ash. Figure 12.37 compares the oil
uptake of Ca-rich sample and modified Ca-rich sample (with sodium oleate) for
heating oil, light crude oil, and Iranian light crude oil.
As seen from Fig. 12.37, the light crude oil and Iranian light crude oil made more
cohesive semi-solid phase than light viscous oil, heating oil. In addition, The Ca-rich
and Si-rich samples of high calcium fly ash had different oilsorption behaviors due to
greater hydrophobicity of Si-rich sample than the Ca-rich sample. But Ca-rich
Fig. 12.37 Comparison of oil uptake behavior of AD and SO-modified AD with ratio of HCFA:
SO ¼ 1: 0.004 for HO, LCO, and ILCO.SO: Sodium oleate, AD Ca-rich sample, HCFA high
calcium fly ash, HO heating oil, LCO light crude oil and ILCO Iranian light crude oil. Reprinted
with permission of (Surface modification of high calcium fly ash for its application in oil spill
cleanup, Karakasi and Moutsatsou, Elsevier)
448
M. Fatehi et al.