A comparison study of peach stone and acrylonitrile-divinylbenzene copolymer based activated carbons as chromium(VI) sorbents

Duranoğlu, Dilek; Trochimczuk, Andrzej W.; Beker, Ülker

doi:10.1016/j.cej.2010.08.054

Cited by 69 publications

(27 citation statements)

References 33 publications

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“…Although the polymers and polymer based adsorbents have been utilized for many adsorption applications e.g. removal of chromium (Duranoglu et al 2010) and CO 2 capture/storage (Fan et al 2014) but the use of polymer adsorbents in adsorption heat pump and cooling system is not so common as compared to carbon, silica-gel and zeolite. The sorption behavior in polymers is quite complex e.g.…”

Section: Introductionmentioning

confidence: 99%

Insights of water vapor sorption onto polymer based sorbents

et al. 2015

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Two polymer based sorbents PS-I and PS-II are analyzed for water sorption applications. Adsorption/desorption isotherms of water vapor onto PS-I and PS-II have been experimentally measured using a magnetic suspension adsorption measurement unit for adsorber temperature ranges 20-80°C and evaporator temperature ranges 2-73°C. The equilibrium adsorption uptake of water vapors corresponding to saturation condition at 30°C by PS-I and PS-II was found nearly 2 and 2.5 times higher than the conventional silica-gel, respectively. Adsorption data has been analyzed for various adsorption models which include Brunauer-Emmett-Teller (BET); Freundlich; DubininAstakhov (D-A); Oswin; and Guggenheim-Anderson-de Boer (GAB) model. The GAB and BET model give the good fit for relative pressure range of 0.10-0.90 and 0.05-0.35, respectively. At all adsorption temperatures of both sorbents, the monolayer uptake by the GAB model is found higher than the BET model. Effect of adsorption potential on adsorption uptake is highlighted in relation with water vapor adsorption mechanism. The isosteric heat of water vapor adsorption is determined for both sorbents using Clausius-Clapeyron equation.

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Section: Introductionmentioning

confidence: 99%

Insights of water vapor sorption onto polymer based sorbents

et al. 2015

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“…This increase in adsorption capacity of ACRF is an indication of an endothermic process [21]. This might be a result of complexation and reduction reactions [22]. Also, diffusion is an …”

Section: Effect Of Temperature On Chromium(vi) Adsorptionmentioning

confidence: 99%

Experimental Investigation on Chromium(vi) Removal From Aqueous Solution Using Activated Carbon Resorcinol Formaldehyde Xerogels

Oyedoh

Ekwonu

2016

Acta Polytech

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Abstract. The adsorption of chromium(VI) metal ion in aqueous solutions by activated carbon resorcinol formaldehyde xerogels (ACRF) was investigated. The results showed that pore structure, surface area and the adsorbent surface chemistry are important factors in the control of the adsorption of chromium(VI) metal ions. The isotherm parameters were obtained from plots of the isotherms and from the application of Langmuir and Freundlich Isotherms. Based on regression analysis, the Langmuir isotherm model was the best fit. The maximum adsorption capacity of ACRF for chromium (VI) was 241.9 mg/g. The pseudo-second-order kinetic model was the best fit to the experimental data for the adsorption of chromium metal ions by activated carbon resorcinol formaldehyde xerogels. The thermodynamics of Cr(VI) ions adsorption onto ACRF was a spontaneous and endothermic process.

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“…These pores curtail the mass transfer resistance, facilitate the diffusion of metal ions due to the low diffusional resistance in the magnetic sorbent, and imply high adsorption capacity and rate (4).…”

Section: Results and Discussion Characterization Of Adsorbentmentioning

confidence: 99%

“…Many processes have been developed for the removal of heavy metal from aqueous media, including adsorption (2)(3)(4), biosorption (5), chemical precipitation (6), filtration and membrane processes (7,8), solvent extraction (9), and ion exchange (10,11) processes. Among these methods, ion exchange has increasingly received more attention in recent years because of its relative simplicity, lower cost, and higher efficiency in removing of heavy metal ions from wastewaters (12).…”

Section: Introductionmentioning

confidence: 99%

Heavy Metal Adsorption by Magnetic Hybrid-Sorbent: An Experimental and Theoretical Approach

Şimşek

Duranoğlu

Beker

2012

Separation Science and Technology

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This study examined the sorption and desorption behaviors of Cu 2þ and Pb 2þ ions, which were adsorbed on the vinyl benzene chloride divinylbenzene (VBC-DVB-OH) polymer and magnetic hybrid adsorbent (VBC-DVB-OH-Fe) at pH 5. Batch and fixed bed column experiments were performed to study practical applicability and the breakthrough curves were obtained. The experimental equilibrium data, suitably fitted by the Langmuir and Freundlich isotherms, have shown that ferric oxide loaded magnetic hybrid sorbent (VBC-DVB-OH-Fe) exhibits higher adsorption capacity than vinyl benzene chloride divinylbenzene (VBC-DVB-OH) polymer. The results indicate the following order to fit the isotherms for both metal ions: Langmuir > Freundlich for polymeric sorbent and Freundlich > Langmuir for VBC-DVB-OH-Fe. The maximum adsorption capacity of VBC-DVB-OH adsorbent is 26.39 mg/g for Pb 2þ and 7.93 mg/g for Cu 2þ whereas it is increased to 45.81 mg/g for Pb 2þ and and 25.64 mg/g for Cu 2þ by using VBC-DVB-OH-Fe adsorbent. A series of column experiments were carried out to determine the breakthrough curves. The regeneration efficiency of the column runs was determined using HCl (10% v/v). The elution efficiency was 90% for each adsorbent.

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A comparison study of peach stone and acrylonitrile-divinylbenzene copolymer based activated carbons as chromium(VI) sorbents

Cited by 69 publications

References 33 publications

Insights of water vapor sorption onto polymer based sorbents

Insights of water vapor sorption onto polymer based sorbents

Experimental Investigation on Chromium(vi) Removal From Aqueous Solution Using Activated Carbon Resorcinol Formaldehyde Xerogels

Heavy Metal Adsorption by Magnetic Hybrid-Sorbent: An Experimental and Theoretical Approach

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