TY - JOUR
T1 - Adsorption of oils from pure liquid and oil-water emulsion on hydrophobic silica aerogels
AU - Wang, Ding
AU - McLaughlin, Elisabeth
AU - Pfeffer, Robert
AU - Lin, Y. S.
N1 - Funding Information:
The authors gratefully acknowledge support for this research from the National Science Foundation through Grant CBET 0730465. We thank the Cabot Corporation for supplying the Nanogel used in our experiments and purchasing a dedicated GC for our use, Dr. Dhaval Doshi and A.J. Duplessis of Cabot Corporation for providing us with an industrial perspective, as well as technical expertise and guidance, Mr. Dan Kelley of Tierra Dynamic Company for supplying the wastewater sample used in the experiments, and Prof. Darsh T. Wasan of the Illinois Institute of Technology for his advice on the effect of the surfactant during the emulsion phase adsorption.
PY - 2012/10/8
Y1 - 2012/10/8
N2 - This paper presents a study on the equilibrium and kinetics of sorption of generic vegetable cooking oil, motor oil, and crude oil from the liquid phase and from an oil-in-water emulsion on two different (0.7-1.2 mm and 1.7-2.35 mm size range) particulate hydrophobic silica aerogel (Cabot Nanogel®). The aerogel has a very high capacity (up to 15.1 g of oil/g of aerogel) and rate (uptake time of 25-1200 s) for adsorption of liquid oils. Thus Nanogel shows very attractive adsorption/absorption properties for oil spill clean-up applications. For adsorption of oil from an oil-in-water emulsion prepared in our laboratory, the rate is 5-10 times slower than that for adsorption of liquid oils or for organics such as toluene from aqueous solution. The adsorption capacity of the aerogel decreases with an increasing proportion of the surfactant used to stabilize the emulsion. When using an industrial oily wastewater sample consisting mainly of jet fuel, an even lower sorption capacity and slower sorption rate was observed due to the high stability of the oily wastewater emulsion.
AB - This paper presents a study on the equilibrium and kinetics of sorption of generic vegetable cooking oil, motor oil, and crude oil from the liquid phase and from an oil-in-water emulsion on two different (0.7-1.2 mm and 1.7-2.35 mm size range) particulate hydrophobic silica aerogel (Cabot Nanogel®). The aerogel has a very high capacity (up to 15.1 g of oil/g of aerogel) and rate (uptake time of 25-1200 s) for adsorption of liquid oils. Thus Nanogel shows very attractive adsorption/absorption properties for oil spill clean-up applications. For adsorption of oil from an oil-in-water emulsion prepared in our laboratory, the rate is 5-10 times slower than that for adsorption of liquid oils or for organics such as toluene from aqueous solution. The adsorption capacity of the aerogel decreases with an increasing proportion of the surfactant used to stabilize the emulsion. When using an industrial oily wastewater sample consisting mainly of jet fuel, an even lower sorption capacity and slower sorption rate was observed due to the high stability of the oily wastewater emulsion.
KW - Emulsion
KW - Freundlich equation
KW - Hydrophobic silica aerogels
KW - Linear driving force model
KW - Sorption
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U2 - 10.1016/j.seppur.2012.08.001
DO - 10.1016/j.seppur.2012.08.001
M3 - Article
AN - SCOPUS:84865981158
SN - 1383-5866
VL - 99
SP - 28
EP - 35
JO - Separation and Purification Technology
JF - Separation and Purification Technology
ER -