Adsorption of Quinoline from Aqueous Solutions by Some Clays and Oxides

Helmy, A. K.; Bussetti, S. G. de; Ferreiro, E. A.

doi:10.1346/ccmn.1983.0310105

Cited by 62 publications

(44 citation statements)

References 13 publications

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“…2b). These results are in agreement with other studies on the sorption of quinoline to montmorillonite (Helmy et al, 1983;Ainsworth et al, 1987;Zachara et al, 1990). Persistence of quinoline sorption at pH .…”

Section: Analytical Proceduressupporting

confidence: 93%

“…Quinoline is one of the major contaminants of soil and groundwater in areas of creosote contamination (Bennet et al, 1985). The sorption of quinoline to clay minerals (Helmy et al, 1983;Ainsworth et al, 1987;Zachara et al, 1990;Chorover et al, 1999), oxides (Helmy et al, 1983), and whole soils (Zachara et al, 1986Thomsen et al, 1999) has revealed two primary sorption mechanisms. At low pH values (ca.…”

Section: Introduction Pmentioning

confidence: 99%

“…In addition, previous studies have shown discrepancies regarding quinoline adsorption isotherm shape and K exc . For example, the adsorption isotherm of quinoline onto clay minerals has been shown to be intermediate between Sand H-type for Na-and Ca-saturated montmorillonite (Helmy et al, 1983), S-type for Na-saturated mntmorillonite , and L-type for spent shale (Zhu et al, 1995). Zachara et al (1990) found K exc for Ca 21 R QH 1 exchange on montmorillonite increased as pH increased in 7.5 mM Ca(ClO 4 ) 2 solution, but K exc was not affected by pH for Na 1 R QH 1 exchange in 10 mM NaClO 4 solution.…”

Section: Introduction Pmentioning

confidence: 99%

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Adsorption of Quinoline to Kaolinite and Montmorillonite

Burgos¹,

Pisutpaisal

Mazzarese

et al. 2002

Environmental Engineering Science

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Adsorption of quinoline (pK a 5 4.92) and background electrolyte (CaCl 2 ) onto specimen kaolinite and montmorillonite were measured as a function of pH (3-7.5) and ionic strength (1-10 mM), and as a function of quinoline concentration (0.2-1.55 mM) at fixed pH values of maximum adsorption. Maximum sorption of quinoline occurred at pH 3.5-4.0 for kaolinite, and pH 3.0-5.0 for montmorillonite. At their respective pH values of maximum adsorption, the sorption capacity for quinoline was 100 times greater with montmorillonite than kaolinite on a mass basis. Selectivity coefficients, which were calculated from pH edge data, indicated selectivity for cationic quinoline (QH 1 ) over Ca 21 was greater with montmorillonite (K exc 5 27 at pH 4) compared to kaolinite (K exc 5 1.6 at pH 4), and K exc was not affected by ionic strength for either clay. The results indicate the important role of charged siloxane sites in the adsorption of this N-heterocyclic contaminant.

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Section: Analytical Proceduressupporting

confidence: 93%

Section: Introduction Pmentioning

confidence: 99%

Section: Introduction Pmentioning

confidence: 99%

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Adsorption of Quinoline to Kaolinite and Montmorillonite

Burgos¹,

Pisutpaisal

Mazzarese

et al. 2002

Environmental Engineering Science

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“…Doehler and Young (1961) found a decrease in quinoline sorption on various clay minerals with increasing pH and ionic strength. Helmy et al (1983), expanding on the work of Doehler and Young, observed maximum sorption at about pH 6 on both phyllosilicates and oxides, about one pH unit >pK~ (4.92) for quinoline. Both of these studies concluded that the cationic and molecular forms of quinoline were adsorbed.…”

Section: Introductionmentioning

confidence: 84%

Quinoline Sorption on Na-Montmorillonite: Contributions of the Protonated and Neutral Species

Ainsworth

1987

Clays and clay miner.

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Abstract--Dilute aqueous solutions of quinoline were contacted with Na-montmorillonite to elucidate the sorption process of the neutral and protonated species. Sorption occurs via a combination of ion exchange and molecular adsorption and yields S-type isotherms. Exchange between the quinolinium ion (QH § and Na can be described by means of Vanselow selectivity coefficients and a thermodynamic exchange constant (K~x). Due to the apparent adsorption of the neutral species at high mole fractions (x) of the solid phase, the thermodynamic standard state was defined as 0.5 mole fraction. The selectivity at pH ~4.95 of the QH § species over Na (at XQH+ = 0.5) was determined to be Kv = 340. At pH ->5.5 surface mole fractions of 0.5 could not he obtained without adsorption of the neutral species. This study suggests that at dilute solution concentrations quinoline is sorbed preferentially as the cation even at pHs >> pI~. A critical surface-solution concentration is apparently necessary for adsorption of the neutral species.

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“…In previous studies (de Bussetti et al, 1980;Ferreiro et al, 1983;Helmy et aL, 1983) the sorption reactions by clays and oxides of compounds that may have industrial and agriculture use or that could ultimately become incorporated in soils and sediments were examined. In the present work, the 8-hydroxyquinoline molecule, also known as quinolinol or oxine, was investigated.…”

Section: Introductionmentioning

confidence: 99%

Sorption of 8-Hydroxyquinoline by Some Clays and Oxides

Ferreiro

Bussetti

Helmy

1988

Clays and clay miner.

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Abstract--The sorption of 8-hydroxyquinoline onto some clays and oxides was studied as a function of concentration, pH, and time. The sorption reaction reached equilibrium in about 5 hr, was irreversible, and reached a maximum at pH 5. The decrease in sorption on both sides of the maximum was attributed to electrostatic interactions of charged molecules with similarly charged surfaces and/or neighbors as well as solvent and proton competition. X-ray powder diffraction of dried clays showed that a one-layer complex formed in which the molecules lay flat between the clay interlayers. The sorption onto the clays included physical and exchange sorption and was accompanied by exchangeable cation hydrolysis. At high surface coverage the silicate structure deteriorated in the direction of the Z-axis due to chemical aggressiveness of the reagent.

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Adsorption of Quinoline from Aqueous Solutions by Some Clays and Oxides

Cited by 62 publications

References 13 publications

Adsorption of Quinoline to Kaolinite and Montmorillonite

Adsorption of Quinoline to Kaolinite and Montmorillonite

Quinoline Sorption on Na-Montmorillonite: Contributions of the Protonated and Neutral Species

Sorption of 8-Hydroxyquinoline by Some Clays and Oxides

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