Removing oils FROM WATER with organoclays

Alther, George R.

doi:10.1002/j.1551-8833.2002.tb09512.x

Cited by 25 publications

(13 citation statements)

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“…The objective of this work is the study of the adsorption of the paranitrophenol on an organoclay synthesised by using a surfactant molecule with two alkyl chains. This study is of great importance for understanding the structure, properties, and potential applications of these types of organoclays, especially in water purification [1][2][3][4][5]7 …”

Section: Introductionmentioning

confidence: 99%

“…Many of these molecules are recalcitrant and difficult to remove through oxidation or photocatalytic oxidation using, for example, hydrogen peroxide and intense UV radiation. One method for purifying water is to use organoclays [1][2][3][4][5]. These organoclays are prepared by ion exchange of the cation in the swelling clay such as montmorillonite with a cation surfactant [6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

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TEM, XRD, and thermal stability of adsorbed paranitrophenol on DDOAB organoclay

Zhou

Frost

et al. 2007

Journal of Colloid and Interface Science

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Water purification is of extreme importance to modern society. Organoclays through adsorption of recalcitrant organics provides one mechanism for the removal of these molecules. The organoclay was synthesised through ion exchange with dimethyldioctadecylammonium bromide labeled as DDOAB of formula (CH3(CH2)17)2NBr(CH3)2. Paranitrophenol (pnp) was adsorbed on the organoclay at a range of concentrations according to the cation exchange capacity (CEC) of the host montmorillonite. The paranitrophenol in solution was analysed by a UV-260 spectrophotometer at 317 nm, with detection limits being 0.05 mg/L. The expansion of the montmorillonite was studied by a combination of X-ray diffraction and transmission electron microscopy. Upon adsorption of the paranitrophenol the basal spacing decreased. The thermal stability of the organoclay was determined by a combination of thermogravimetry and infrared emission spectroscopy. The surfactant molecule DDOAB combusts at 166, 244, and 304 degrees C and upon intercalation into Na-montmorillonite is retained up to 389 degrees C thus showing the organoclay is stable to significantly high temperatures well above the combustion/decomposition temperature of the organoclay.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

TEM, XRD, and thermal stability of adsorbed paranitrophenol on DDOAB organoclay

Zhou

Frost

et al. 2007

Journal of Colloid and Interface Science

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“…Many studies have been reported on the effectiveness of modified clays in the treatment of contaminants (e.g. Alther, 2002a;2002b;Faschan, 1992;LaGrega et al, 2001;Montgomery et al, 1991). Modified clays have been successfully used in some of the UK commercial projects mentioned above: West Drayton site project (Evans and AlTabbaa, 1999), Long Eaton, Nottingham (Al-Tabbaa and Evans, 2003) and the Sir John Rogerson's quay, Dublin (Evans, 2005).…”

Section: Modified Claysmentioning

confidence: 95%

Soil mix technology for land remediation: recent innovations

Al‐Tabbaa

Barker

Evans³

2011

Proceedings of the Institution of Civil Engineers - Ground Impr

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The past 15 years have seen increasing applications of soil mix technology in land remediation, mainly in stabilisation/solidification treatments and the construction of low-permeability cut-off walls and permeable reactive barriers; clear evidence of the versatility of the technology and its wide-ranging applications. This paper provides an overview of some of the recent innovations of soil mix technology in land remediation covering equipment developments and applications, including systems for rectangular panels and trenching systems, treatments, such as chemical oxidation, and additives, such as modified clays, zeolites and reactive magnesia. The paper also provides case studies for such innovations. The paper concludes with an overview of an on-going research and development project SMiRT (Soil Mix Remediation Technology) which will involve field trials on a contaminated site and will employ some of the innovations discussed in the paper. The range of significant advantages that soil mix technology now offers compared to other remediation techniques is likely to place this remediation method at the forefront of remedial options for future brownfield projects.

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“…Quaternary ammonium salts have also been used to modify cellulose surfaces [29]. Furthermore, the use of surfactant treated materials to remove oil-in-water has been investigated such as wheat straw and organoclay [30]. Chemical functionalization of the biomass surface by a cationic surfactant is carried out to introduce stable positive electrostatic charges on the surface to obtain better dispersion, and tune its surface energy characteristics to improve compatibility, especially when used in conjunction with nonpolar or hydrophobic materials [31].…”

Section: Introductionmentioning

confidence: 99%

The preparation and utilization of the cationic sorbent based on the surfactant modified bottle gourd shell

Marković-Nikolić¹,

Bojić²,

Petković³

et al. 2017

Adv Techol

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The surface of the bottle gourd shell (BGS), a solid agricultural residue of Lagenaria vulgaris Ser. was chemically modified using a cationic surfactant, hexadecyltrimethylammonium chloride (HTAC). The success of the modification was confirmed by FTIR spectroscopy. Chemical characterization of the lignocellulosic BGS biomass and the surfactant modified bottle gourd shell (MBGS) was carried out using the compositional and elemental analysis. The amount of surfactant sorbed on the BGS surface was measured as a function of the surfactant bulk concentration. Sorption isotherms were used to verify self-assembly models of cationic surfactant sorption onto oppositely charged MBGS substrates. The shape of sorption isotherms was applied to describe the behavior of the surfactant/BGS system. The surfactant modified shell was tested as a sorbent for the removal of phosphate and nitrate from contaminated aqueous solutions. The sorption of anionic pollutants on MBGS was performed in a series of batch sorption experiments at 20 o C. It was found that the MBGS yielded sorption efficiency was 40% for phosphate and 22% for nitrate. The sorption mechanism involving the ion exchange might be responsible for the uptake of anions. The morphology and surface properties of the MBGS sorbent before and after sorption of anionic pollutants were analyzed by SEM methods. Compared to other non-surfactant sorbents, the advantage of MBGS as a sorbent is that it can be used for the removal of anionic pollutants not only from aqueous solutions but also from the emulsified oil wastewater or nonpolar effluents.

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Removing oils FROM WATER with organoclays

Cited by 25 publications

References 1 publication

TEM, XRD, and thermal stability of adsorbed paranitrophenol on DDOAB organoclay

TEM, XRD, and thermal stability of adsorbed paranitrophenol on DDOAB organoclay

Soil mix technology for land remediation: recent innovations

The preparation and utilization of the cationic sorbent based on the surfactant modified bottle gourd shell

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