Equilibrium and kinetics for the sorption of promethazine hydrochloride onto K10 montmorillonite

Gereli, Gürhan; Seki, Yoldaş; Kusoglu, İhsan Murat; Yurdakoç, Kadir

doi:10.1016/j.jcis.2006.02.012

Cited by 88 publications

(37 citation statements)

References 23 publications

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“…The magnitude of the change in free energy for multilayer adsorption is greater than 4.8 kcal/mol and less than zero [29]. Therefore, the adsorption type and the adsorption isotherm in this study could be regarded as physical adsorption and monolayer adsorption isotherm (Langmuir model), respectively.…”

Section: Adsorption Isothermmentioning

confidence: 91%

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Adsorption of methyl ethyl ketone onto poly(vinyl alcohol)(PVA)/peat/organoclay composite beads in aqueous solution

Chan¹,

Lai²

2012

J Polym Res

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A new type of poly(vinyl alcohol)(PVA)/peat/ organoclay composite beads was prepared. This composite bead was a porous spherical particle with a diameter of 3.0-5.0 mm and a porosity of about 50%. The oragnoclay is prepared by hexadecyl trimethyl ammonium bromide (HDTMA) exchanged clay. The dynamic adsorption behavior between methyl ethyl ketone (MEK) and this composite bead was investigated. The adsorption process occurs in two stages with external mass transport occurring in the early stage and intraparticle diffusion occurring in the later stage. The rate of MEK diffusion in the external mass transport process and the intraparticle diffusion process in the adsorption temperature 20-35°C was 3.28-76.98×10 −8 cm 2 /s and 1.62-3.17×10 −7 cm 2 /s, respectively. The rate of MEK diffusion in both processes was concentration independent, and it increased with increasing the adsorption temperature. Langmuir isotherm adsorption model was more suitable for describing the adsorption equilibrium of MEK. The calculated Q values in the adsorption temperature 20-35°C were 5.90-22.78 mg/g composite bead. The adsorption capacity of this composite bead increased with increasing the adsorption temperature. The adsorption process was physical adsorption, endothermic and non-spontaneous process.

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Section: Adsorption Isothermmentioning

confidence: 91%

“…Therefore, the adsorption capacity of composite bead was greater at higher adsorption temperature. The absolute magnitude of the change in free energy for physical adsorption and chemical adsorption is generally in the range of 0-4.8 kcal/mol and 19-95 kcal/mol, respectively [29].…”

Section: Adsorption Isothermmentioning

confidence: 99%

Adsorption of methyl ethyl ketone onto poly(vinyl alcohol)(PVA)/peat/organoclay composite beads in aqueous solution

Chan¹,

Lai²

2012

J Polym Res

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“…For the intra-particle diffusion model the value of c was related to the thickness of the boundary layer. The larger the intercept, the greater the boundary layer effect [28]. According to this model, if the plot of uptake (qt) versus the square root of time (t 1/2 ) was linear and passes through the origin, then intra-particle diffusion was the only rate-controlling step [22].…”

Section: Sorption Kineticsmentioning

confidence: 99%

Comparing Sorption Characteristics of Tetrabromobisphenol-A, Bisphenol-A, and 2,6-Dibromophenol in a Single-Aolute Aystem

Li¹,

Peng²,

Zhang³

et al. 2016

Pol. J. Environ. Stud.

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Tetrabromobisphenol-A (TBBPA) and its analogue compounds (bisphenol-A (BPA) and 2, 6-dibromophenol (2, 6-DBP)) sorption on CTMAB-clays was investigated in this paper through bath experiments. Montmorillonite and kaolinite modified by CTAMB, as the adsorbent, were firstly characterized by XRD, FTIR and SEManalysis. The surface areas was determined using N2 (77K) sorption-desorption analysis. Kinetic studies showed that sorption reached equilibrium in 5 hours and followed the pseudosecond order kinetic model. The intra-particle diffusion model for sorption was also investigated and compared to identify the sorption mechanism. The sorption isotherms, well fitted by Freundlich model, were changed from being non-linear to being linear with intercalating CTMAB into clays, which indicated that CTMAB increased the partition interaction. A combination of partition and specific sorption might be contributed to TBBPA and its composition products sorption mechanism. The Freundlich coefficients (kF) and distribution coefficients (kd) for both two adsorbents were primarily increased by increasing amount of adsorbed CTMAB, while the organic carbon normalized sorption coefficients (koc) did not follow this trend. Meanwhile, 100%CEC-CTMAB-Montmorillonite showed an advantage of removal of the selected compounds than 100%CEC-CTAMB-Kaolinite. The sorption capacity of BPA was bigger than that of 2, 6-DBP in spite of their similar hydrophobicity, which indicated some molecule properties might influence the sorption on CTMAB-clays. Moreover, the negative ∆G0 and ∆H0 indicated the spontaneous and exothermal process. The TBBPA sorption on CTMAB-clays was considerably enhanced in the acid condition.

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“…The Langmuir equilibrium constant reported for an initial sulfamethoxazole concentration in the range 507-7598 mg/L at 25 o C and pH 7.2 was 555 L/g. Gereli et al 113 studied the adsorption of the cationic drug promethazine hydrochloride from aqueous solution onto K10 montmorillonite at 17.5, 25 and 30 o C and reported Langmuir equilibrium constants of 21.35, 84.96 and 115.14 L/g, respectively.…”

Section: -89mentioning

confidence: 99%

Recent research data on the removal of pharmaceuticals from sewage treatment plants (STP)

Tambosi¹,

Yamanaka²,

José³

et al. 2010

Quím. Nova

131

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Recebido em 12/12/08; aceito em 24/7/09; publicado na web em 8/1/10 Pharmaceutical compounds have been detected in sewage treatment plant (STP) effluents, surface waters and, less frequently, in groundwater and drinking water, all over the world. Different sources are responsible for their appearance in the aquatic environment, however, it is widely accepted that the main sources of this type of pollutant are STP effluents. The adverse effects of pharmaceuticals in the environment include aquatic toxicity, development of resistance in pathogenic bacteria, genotoxicity and endocrine disruption. Thus, the discharge of these compounds to the environment in STP effluents should be minimized.

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Equilibrium and kinetics for the sorption of promethazine hydrochloride onto K10 montmorillonite

Cited by 88 publications

References 23 publications

Adsorption of methyl ethyl ketone onto poly(vinyl alcohol)(PVA)/peat/organoclay composite beads in aqueous solution

Adsorption of methyl ethyl ketone onto poly(vinyl alcohol)(PVA)/peat/organoclay composite beads in aqueous solution

Comparing Sorption Characteristics of Tetrabromobisphenol-A, Bisphenol-A, and 2,6-Dibromophenol in a Single-Aolute Aystem

Recent research data on the removal of pharmaceuticals from sewage treatment plants (STP)

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