The pH-dependent adsorption of tributyltin to charcoals and soot

Fang, Liping; Borggaard, Ole K.; Marcussen, Helle; Holm, Peter E.; Hansen, Hans Christian Bruun

doi:10.1016/j.envpol.2010.08.003

Cited by 23 publications

(27 citation statements)

References 59 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, under acidic conditions, adsorbent surface becomes a significantly protonated surface that goes against the uptake of TBT + form due to electrostatic repulsion. The TBT maximum adsorption took place at a medium pH for all adsorbents, and this is in analogous to the TBT adsorption by the beech charcoal and soot black carbon [17]. At higher pH (pH > pKa), the adsorption decreased due to the TBT species (TBTOH), which are not favorable for those three materials.…”

Section: Influence Of Ph On Removal Efficiency Of Tbtmentioning

confidence: 94%

See 1 more Smart Citation

Comparative Study of Tributyltin Adsorption onto Mesoporous Silica Functionalized with Calix[4]arene, p-tert-Butylcalix[4]arene and p-Sulfonatocalix[4]arene

2014

View full text Add to dashboard Cite

Abstract:The adsorption of tributyltin (TBT), onto three mesoporous silica adsorbents functionalized with calix [4]arene, p-tert-butylcalix[4]arene and p-sulfonatocalix [4]arene (MCM-TDI-C4, MCM-TDI-PC4 and MCM-TDI-C4S, respectively) has been compared. Batch adsorption experiments were carried out and the effect of contact time, initial TBT concentration, pH and temperature were studied. The Koble-Corrigan isotherm was the most suitable for data fitting. Based on a Langmuir isotherm model, the maximum adsorption capacities were 12.1212, 16.4204 and 7.5757 mg/g for MCM-TDI-C4, MCM-TDI-PC4 and MCM-TDI-C4S, respectively. The larger uptake and stronger affinity of MCM-TDI-PC4 than MCM-TDI-C4 and MCM-TDI-C4S probably results from van der Waals interactions and the pore size distribution of MCM-TDI-PC4. Gibbs free energies for the three adsorption processes of TBT presented a negative value, reflecting that TBT/surface interactions are thermodynamic favorable and spontaneous. The interaction processes were accompanied by an increase of entropy value for MCM-TDI-C4 and MCM-TDI-C4S (43.7192 and 120.7609 J/mol K, respectively) and a decrease for MCM-TDI-PC4 (−37.4704 J/mol K). It is obviously observed that MCM-TDI-PC4 spontaneously adsorbs TBT driven mainly by enthalpy change, while MCM-TDI-C4 and MCM-TDI-C4S do so driven mainly by entropy changes.

show abstract

Section: Influence Of Ph On Removal Efficiency Of Tbtmentioning

confidence: 94%

“…Adsorption using sorbents is among the widely employed methods to remove pollutants. Systematic examinations of the adsorption of TBT on various absorbents like natural sediments [11][12][13], pure minerals [14,15], organic matters [16] and black carbons [13,17] have been carried out.…”

Section: Introductionmentioning

confidence: 99%

Comparative Study of Tributyltin Adsorption onto Mesoporous Silica Functionalized with Calix[4]arene, p-tert-Butylcalix[4]arene and p-Sulfonatocalix[4]arene

2014

View full text Add to dashboard Cite

show abstract

“…Studies on other organic ionizable compounds also confirmed our results. For example, studies on adsorption of tributyltin (TBT) on sediments or black carbon all demonstrated that the sorption is pHdependent and TBTOH was adsorbed to hydrophobic sites, whereas TBT + was adsorbed by the anionic sites on the particle surfaces (Burton et al 2004;Fang et al 2010). Bi et al (2006) reported that specific interactions, such as complexation of surface-bound cation rather than partition, were the dominant mechanism in the sorption of indole, 2-hydroxyquinoline, and benzotriazole.…”

Section: Isotherms Of Organic Amines In a Single-solute Systemmentioning

confidence: 98%

Sorption of Ionizable Organic Amines on Soil and Their Effects on Phenanthrene Sorption

Sun

Wang

Feng

et al. 2015

Water Air Soil Pollut

View full text Add to dashboard Cite

Sorption of four ionizable organic amines, nhexylamine, trimethylamine, 1-naphthylamine, and phenylamine, on a soil sample were measured, and their effects on the sorption of phenanthrene (PHE) to the same adsorbent were studied. The aim of this study was to better clarify sorption mechanisms of chemicals with different polarity and ionization characteristics in a single-solute system and in a polar/nonpolar binary system. In the single system, cationic organic amines exhibited greater sorption than those in a neutral form, and the sorption increased with hydrophobicity for amines with the same form. In the binary system, the sorption of PHE was promoted in the presence of nhexylamine and the solid-water distribution coefficient (K d ) increased with increasing amine concentrations. This may be explained by the elevated amount of hydrophobic organic sites provided by the head-on adsorption of cationic n-hexylamine to the negatively charged sorbent surface, which are probably more favorable for the sorption of PHE compared with natural organic matters. Contrarily, the neutral amine, 1-naphthylamine, might compete with PHE for the mutually available hydrophobic sites and hence inhibited PHE sorption.On the other hand, both trimethylamine and phenylamine had little effects on PHE sorption due to their relatively high solubility and weak hydrophobicity. Therefore, either in single or binary system, both the form and the solubility/hydrophobicity of the compound play important roles in the sorption of ionizable organic amines and their effects on the sorption of nonpolar cosolute.

show abstract

“…However, single HPLC is incapable of detecting a large number of OTs, which lack chromophores in their structures. Although ICP-MS is a very sensitive technique, the OT structures cannot be identified and the interference of inorganic tin species cannot be eliminated (Ayanda, Fatoki, Adekola, & Ximba, 2013;Fang, Borggaard, Marcussen, Holm, & Bruun Hansen, 2010;Yamashita, Dozono, Takahashi, & Honda, 2012). Among the detection techniques, tandem mass spectrometry (MS/MS) offers a number of advantages: more selective separation, element specificity, low detection limits, and high sensitivity.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous determination of four organotins in food packaging by high-performance liquid chromatography–tandem mass spectrometry

She

Wang

et al. 2015

Food Chemistry

View full text Add to dashboard Cite

The pH-dependent adsorption of tributyltin to charcoals and soot

Cited by 23 publications

References 59 publications

Comparative Study of Tributyltin Adsorption onto Mesoporous Silica Functionalized with Calix[4]arene, p-tert-Butylcalix[4]arene and p-Sulfonatocalix[4]arene

Comparative Study of Tributyltin Adsorption onto Mesoporous Silica Functionalized with Calix[4]arene, p-tert-Butylcalix[4]arene and p-Sulfonatocalix[4]arene

Sorption of Ionizable Organic Amines on Soil and Their Effects on Phenanthrene Sorption

Simultaneous determination of four organotins in food packaging by high-performance liquid chromatography–tandem mass spectrometry

Contact Info

Product

Resources

About