Highly swellable sol–gels prepared by chemical modification of silanol groups prior to drying

Burkett, Colleen M.; Edmiston, Paul L.

doi:10.1016/j.jnoncrysol.2005.08.015

Cited by 29 publications

(43 citation statements)

References 11 publications

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“…Swellable organically modified silica (Osorb ® ) was manufactured according to published protocols (Burkett & Edmiston, 2005) under license to ABSMaterials, Inc. (Wooster, Ohio). Iron-Osorb ® was prepared using RNIP nZVI obtained from Toda (Japan) and incorporated into Osorb ® after addition of 1 percent palladium (II) acetate (Aldrich; St. Louis, Missouri) with 1 hour of mixing at 25 • C to form bimetallic particles.…”

Section: Methodsmentioning

confidence: 99%

“…Osorb ® is a new type of highly organophilic material that reversibly extracts dissolved or dispersed organic compounds with such high capacity that the sorbent can swell up to 8 times its dry volume with neat organic liquids (Burkett & Edmiston, 2005). Osorb ® is comprised of swellable organically modified silica, a novel hybrid organic-inorganic material that was recently discovered, and its synthesis is fully described (Burkett, Underwood, Volzer, Baughman, & Edmiston, 2008).…”

Section: Description Of Osorbmentioning

confidence: 99%

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Pilot scale testing composite swellable organosilica nanoscale zero‐valent iron—Iron‐Osorb®—for in situ remediation of trichloroethylene

Edmiston

Osborne

Reinbold

et al. 2011

Remediation Journal

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Iron-Osorb ® is a solid composite material of swellable organosilica with embedded nanoscale zero-valent iron that was formulated to extract and dechlorinate solvents in groundwater. The unique feature of the highly porous organosilica is its strong affinity for chlorinated solvents, such as trichloroethylene (TCE), while being impervious to dissolved solids. The swellable matrix is able to release ethane after dechlorination and return to the initial state. Iron-Osorb ® was determined to be highly effective in reducing TCE concentrations in bench-scale experiments. The material was tested in a series of three pilot scale tests for in situ remediation of TCE in conjunction with the Ohio Environmental Protection Agency at a site in central Ohio. Results of these tests indicate that TCE levels were reduced for a period of time after injection, then leveled out or bounced back, presumably due to depletion of zero-valent iron. Use of tracer materials and soil corings indicate that Iron-Osorb ® traveled distances of at least 20 feet from the injection point during soil augmentation. The material appears to remain in place once the injection fluid is diluted into the surrounding groundwater. Overall, the technology is promising as a remediation method to treat dilute plumes or create diffuse permeable reactive barriers. Keys to future implementation include developing injection mechanisms that optimize soil distribution of the material and making the system long-lasting to allow for continual treatment of contaminants emanating from the soil matrix. O

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Section: Methodsmentioning

confidence: 99%

Section: Description Of Osorbmentioning

confidence: 99%

Pilot scale testing composite swellable organosilica nanoscale zero‐valent iron—Iron‐Osorb®—for in situ remediation of trichloroethylene

Edmiston

Osborne

Reinbold

et al. 2011

Remediation Journal

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“…Osorb can reversibly swell up to 8 times its dry volume in the presence of organic liquids (Edmiston et al 2005). Osorb does not swell in water, but is highly effective at removing a wide range of dissolved organics from water.…”

Section: Technology Overviewmentioning

confidence: 99%

Ex Situ Removal of BTEX and Hydrocarbons from Produced Waters Using Swellable, Absorbent Glass

Edmiston¹,

Underwood²,

Keener³

et al. 2011

proc water environ fed

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Osorb ® is a silica-based, swellable glass which can effectively capture 96-99.9% of dissolved and dispersed organic compounds from produced water. The glass is reusable and hydrophobic, allowing it to repeatedly and reversibly absorb up to eight times its own mass in organics without absorbing any water. Osorb has been successfully used to treat samples of produced water from Wyoming, Canada, and the Gulf of Mexico Two ex situ pilot systems have been developed to utilize the technology. PW Unit #1 is a 246 L/min (65 gpm) treatment system that has completed multiple treatments of Clinton formation produced water and is being deployed for pilot testing in Wamsutter, WY. Skid Unit #1 is a capture-only, fixed bed system that can treat produced water at 8-23 L/min (2-6 gpm). Skid Unit #1 has been successfully fielded in southern Texas and is being deployed for pilot testing in the Marcellus Shale region.

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“…At issue was whether naphthalene solid would induce matrix expansion and enhanced capacity. Based on SOMS surface area measured using nitrogen absorption [19], it is estimated that a packed monolayer of naphthalene is achieved at a loading 120 g/mg. The amount of naphthalene absorbed after 50,000 bed volumes of applied 20 ppm naphthalene solution was 365 g/mg (Table 8).…”

Section: Breakthrough Curvesmentioning

confidence: 99%

“…1). (For a complete description of the properties of these materials see [19,20]. A movie of the swelling is available in Supplemental Information) Swellable organically modified silica (SOMS) is generated from the polycondensation of bis(trimethoxysilylethyl)-benzene (BTEB, Fig.…”

Section: Introductionmentioning

confidence: 99%

Absorption of dissolved organic species from water using organically modified silica that swells

Edmiston

Underwood

2009

Separation and Purification Technology

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Highly swellable sol–gels prepared by chemical modification of silanol groups prior to drying

Cited by 29 publications

References 11 publications

Pilot scale testing composite swellable organosilica nanoscale zero‐valent iron—Iron‐Osorb®—for in situ remediation of trichloroethylene

Pilot scale testing composite swellable organosilica nanoscale zero‐valent iron—Iron‐Osorb®—for in situ remediation of trichloroethylene

Ex Situ Removal of BTEX and Hydrocarbons from Produced Waters Using Swellable, Absorbent Glass

Absorption of dissolved organic species from water using organically modified silica that swells

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