Competitive adsorption of sulfolane and thiolane on clay materials

Kim, Chang Gyun; Clarke, William P.; Lockington, David

doi:10.1007/bf02706839

Cited by 7 publications

(6 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It was recently reported that the groundwater in Brisbane, Australia, was contaminated by sulfolane from dumping that occurred over 20 years ago. 8 Another possible separation technique is fractional distillation. As mentioned, it is difficult because of the close relative volatilities.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Aromatics/Aliphatics Separation by Adsorption: New Sorbents for Selective Aromatics Adsorption by π-Complexation

Takahashi

Yang

2000

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

New sorbents for benzene/cyclohexane separation based on π-complexation were prepared by dispersion of transition metal salts on a high-surface-area substrate. PdCl 2 or AgNO 3 dispersed on SiO 2 gel exhibited high equilibrium adsorption ratios of benzene over cyclohexane. PdCl 2 loading of 0.88 g/g of SiO 2 showed the best benzene/cyclohexane ratio of 3.2. The heats of adsorption of benzene on these sorbents were in the range 7-12 kcal/mol and followed the rank order CuCl > PdCl 2 > AgNO 3 > AuCl 3 > PtCl 4 , compared to 5-7 kcal/mol for cyclohexane. Molecular orbital calculations for the bonding of benzene and chlorides of these metals were performed at the Hartree-Fock (HF) and density functional theory (DFT) levels using effective core potentials. The theoretical bond energies were (in kcal/mol) 12.5 (CuCl), 10.8 (PdCl 2 ), 8.6 (AgCl), 6.5 (AuCl 3 ), and 5.2 (PtCl 4 ), in fair agreement with the experimental results. The M-C interactions followed classical π-complexation in most cases, and differences in the bonds with these metal ions are explained by natural bond orbital results.

show abstract

Section: Introductionmentioning

confidence: 99%

“…One of the most representative solvents, sulfolane, is potentially hazardous and is now regulated by the Federal Toxic Substances Control Act of EPA, Section 8(a) (). It was recently reported that the groundwater in Brisbane, Australia, was contaminated by sulfolane from dumping that occurred over 20 years ago …”

Section: Introductionmentioning

confidence: 99%

Aromatics/Aliphatics Separation by Adsorption: New Sorbents for Selective Aromatics Adsorption by π-Complexation

Takahashi

Yang

2000

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

show abstract

“…Multiple articles and reports have examined the fate, remediation, and environmental impacts of sulfolane [8,[10][11][12][13]. In brief, due to its chemical stability, sulfolane persists in the environment for a long time when released, and its high solubility in water can lead to the contamination of groundwater resources.…”

Section: Introductionmentioning

confidence: 99%

Sulfolane Analysis in Environmental Samples: A Critical Review

Kobarfard,

Górecki

2023

Separations

View full text Add to dashboard Cite

Sulfolane, a highly water-soluble industrial solvent, has raised environmental concerns due to its widespread usage and its prolonged persistence once released into the environment. To assess the extent of contamination effectively, reliable analytical methods are essential. In this review article, the existing methodologies for the sample preparation and determination of sulfolane are systematically examined and evaluated. In brief, existing guidelines for sampling from environmental matrices provide a solid foundation for sulfolane analysis. Notably, there is little variation in the choice of final determination methods, with GC-MS or GC-FID being favored across all studies. However, substantial variability emerges in sample preparation methods. Moreover, upon scrutiny of the analytical procedures utilized in sulfolane analysis, it becomes evident that a considerable number of them are characterized by inefficiency or environmental hazards, often relying on substantial quantities of chlorinated solvents. Through this review, valuable insights into the challenges at hand and potential solutions can be gained, offering a foundation for the development of novel sulfolane analysis methods applicable to a range of environmental matrices. Overall, this field calls for further research to devise efficient and environmentally sustainable analytical methods for sulfolane analysis.

show abstract

“…including three papers that discussed the sulfolane adsorption on clays and aquifer materials (Luther, Dudas and Fedorak 1998), (Kim, Clarke and Lockington 1999), (Saint-Fort 2006), two papers and conference proceedings investigated the sulfolane adsorption on biological activated carbon (McLeod, et al 1991), (Ying, et al 1994), a patent disclosure (Coggeshall and Price 2013) and a Master thesis that reported the adsorption of sulfolane on bare (i.e., bio-mass free) GACs (Diaz 2015). The papers on biological activated carbon and the patent on bare granular activated carbon contained little/no information regarding the kinetics of sulfolane adsorption, adsorption isotherm, and how factors such as water chemistry conditions and co-contaminants (e.g., DIPA, benzene) can influence sulfolane adsorption.…”

Section: Physical Separationmentioning

confidence: 99%

“…Pump-and-treat remediation is a particularly common approach used to prevent the migration of contaminant plumes. However, a careful literature search conducted by the author's of this thesis only returned less than 10 papers that reported the adsorption of sulfolane on various types of surfaces such as clays, aquifer materials, biological activated carbon, and granular carbon (McLeod, et al 1991), (Ying, et al 1994), (Kim, Clarke and Lockington 1999), (Diaz 2015), (Luther, Dudas and Fedorak 1998), (Saint-Fort 2006), (Coggeshall and Price 2013). Of the documents that was found, only four documents (two conference proceedings, a patent disclosure and a Master thesis) reported the adsorption of sulfolane on bare (i.e., biomass-free) activated carbon (Coggeshall and Price 2013), (Diaz 2015), (Ying, et al 1994), (McLeod, et al 1991).…”

Section: Introductionmentioning

confidence: 99%

An Evaluation of Various Carbonaceous and Synthetic Adsorbents for the Treatment of Sulfolane

Dinh¹

View full text Add to dashboard Cite

Sulfolane (2,3,4,5-tetrahydrothiophene-1,1-dioxide) is an industrial solvent used in a variety of applications including in synthetic chemistry, electric and electrical circuit processing, and in the oil and gas industry. The most popular application of sulfolane is for the extraction of aromatic hydrocarbons and sweetening of natural gas in which sulfolane is mixed with alkanolamines (such as diisopropanolamine) as well as other organic substances. Improper handling, storage, and disposal of pure sulfolane solvent and sulfolane-containing wastes have created contaminated sites where the concentration of sulfolane can be hundreds of mg/L. Sulfolane is miscible with water, non-volatile, does not adsorb to mineral surfaces to an appreciable extent, and does not biodegrade quickly under conditions where nutrients and oxygen are limited. As such, once sulfolane is released into the subsurface it will travel long distances and create large contamination plumes that can be difficult to contain and mitigate. Sulfolane in groundwater systems and private wells have been detected in Canada, the US, Australia, and other countries. While sulfolane's toxicity and the risk that it can pose to human health are not thoroughly understood, residences whose drinking water wells containing detectable levels of sulfolane (0.01 mg/L-1 mg/L) have been put under water advisories. Therefore, there is an urgent need to develop treatment technologies capable of cleaning up sulfolane-contaminated sites and removing sulfolane from drinking water to protect water resources and human health. The overall objective of this research was to investigate the adsorption of sulfolane on a wide variety of natural and synthetic adsorbents, including sand, iron oxide, aluminum oxide, eight types of granular activated carbons (GAC), Ambersorb 560, Optipore L493, silica gel, zeolite, and silica gel. The removal of sulfolane by these materials were xii

show abstract

Competitive adsorption of sulfolane and thiolane on clay materials

Cited by 7 publications

References 11 publications

Aromatics/Aliphatics Separation by Adsorption: New Sorbents for Selective Aromatics Adsorption by π-Complexation

Aromatics/Aliphatics Separation by Adsorption: New Sorbents for Selective Aromatics Adsorption by π-Complexation

Sulfolane Analysis in Environmental Samples: A Critical Review

An Evaluation of Various Carbonaceous and Synthetic Adsorbents for the Treatment of Sulfolane

Contact Info

Product

Resources

About