Binary adsorption equilibrium and breakthrough of toluene and cyclohexane on macroporous and hypercrosslinked polymeric resins

Shi, Qiuyi; Yang, Xinyu; Liuyan, Wu; Liu, Huijuan; Zhang, Jian; Zhang, Feng; Long, Chao

doi:10.1016/j.micromeso.2018.05.034

Cited by 27 publications

(11 citation statements)

References 34 publications

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“…Due to the fact that isotherms showed a concave form, they were adjusted to the models of Langmuir and Freundlich, according to the suggestion of Limousin et al [ 7 ]; the results are shown in Figure 4 and Table 3 . According to the adsorbed amounts, they were within the ranges found in other studies (only one was found where toluene–cyclohexane adsorption was studied, but in polymeric resins) [ 55 , 56 , 57 , 58 , 59 ] and if toluene solutions were compared in hexane and cyclohexane, adsorption was higher when the solvent was cyclohexane for all samples; as for activated carbons, the adsorbed amount was much lower for the oxidized sample without heat treatment and increased for samples that were exposed to heat treatment. The same occurred with Freundlich’s constant, which was also associated with the adsorption capacity; this parameter presented the lowest values for the OAC sample and increased for OAC723 and OAC1023 and the highest values were for the toluene–cyclohexane systems.…”

Section: Resultssupporting

confidence: 81%

Enthalpic and Liquid-Phase Adsorption Study of Toluene–Cyclohexane and Toluene–Hexane Binary Systems on Modified Activated Carbons

2021

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The liquid-phase adsorption of toluene in cyclohexane and hexane solutions on modified activated carbons was evaluated; the energy involved in the interaction between these solutions and the solids was determined by immersion enthalpies of pure solvents and their mixtures, and the contribution of the system constituents was calculated by differential enthalpies. The thermal treatment generated modifications that favored adsorption and interaction with the evaluated solutions, since it increased the textural parameters and the basic character of the samples. Cyclohexane could create greater competition with the adsorption sites compared to hexane, but it favored the increase in adsorption capacities (0.416 to 1.026 mmol g−1) and the interactions with the solid evaluated through the immersion enthalpies. The immersion enthalpies of pure solvents (−16.36 to −112.7 J g−1) and mixtures (−25.65 to −104.34 J g−1) had exothermic behaviors that were decreasing due to the possible displacement of solvent molecules when increasing the solute concentration in the mixtures. The differential enthalpies for toluene were negative (−18.63 to −2.14 J), mainly due to the π–π interaction with the solid, while those of the solvent–solid component tended to be positive values (−4.25 to 55.97 J) due to the displacement of the solvent molecules by those of toluene.

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Section: Resultssupporting

confidence: 81%

Enthalpic and Liquid-Phase Adsorption Study of Toluene–Cyclohexane and Toluene–Hexane Binary Systems on Modified Activated Carbons

2021

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“…The plots of Langmuir and Freundlich, Temkin, and D‐R isotherms are presented in Figure (b), and the parameters were calculated from the MB adsorption isotherm model on PVA/agar/maltodextrin membrane, as summarized in Table . It can be seen that the Temkin model still best described the adsorption behavior of MB on PMA 20:80 membrane ( R 2 = 0.9911) and mean relative error (7.5%) lower than 15% compared to the ideal adsorbed solution theory . Meanwhile, the correlation coefficients from Langmuir, Freundlich, and D‐R model were found in 0.9816, 0.9625, and 0.8984, respectively.…”

Section: Resultsmentioning

confidence: 99%

Enhanced selective adsorption of cation organic dyes on polyvinyl alcohol/agar/maltodextrin water‐resistance biomembrane

Hoang

Nguyen

Bui

et al. 2019

J of Applied Polymer Sci

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In this study, we designed a novel hydrogel composite membrane based on the combination of polyvinyl alcohol (PVA), agar, and maltodextrin through a facile solution‐casting router. From Fourier‐transform infrared spectroscopy, contact angle, scanning electron microscopy, and swelling analyses, the formation of hydrogen bonds between surface functional groups of PVA, agar, and maltodextrin was confirmed. As a result, the PVA/agar/maltodextrin membranes exhibited a more hydrophobic nature compared with pure PVA. The thermal stability and integrity of such obtained composite membranes were also elucidated by the evaluation of thermogravimetric analysis and mechanical behavior. Besides, the composite membrane exhibited high selective adsorption for cationic dyes, namely 20.2 mg g−1 for methylene blue and 19.17 mg g−1 for crystal violet at initial dye concentration of 100 mg/L, an adsorbent dosage of 0.1 g, contact time of 180 min, and solution pH 7, while anionic dyes such as congo red and methyl orange are approximately zero. The adsorption kinetics and isotherm of the as‐prepared composite membranes were well fitted to the pseudo‐second‐order and Temkin model. The effect of factors, including contact time, solution pH, PVA content, and initial dye concentration on the adsorption capacity of the as‐prepared composite membrane was also investigated in detail. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 137, 48904.

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“…The reason could interpret that OM was displaced by more competitive alkaloid (MT) when the adsorption sites were not enough. 39 Thereby, the ratio of MT and OM can be calculated with the equilibrium adsorption capacity according to the binary adsorption curves ( Table 2 ). 6 PS-MP18 exhibited the highest selective adsorption to MT among the three modified resins.…”

Section: Results and Discussionmentioning

confidence: 99%

“…The result was in good agreement with the relative minor values of Δ H of the MT-modified resin system. The reason could interpret that OM was displaced by more competitive alkaloid (MT) when the adsorption sites were not enough . Thereby, the ratio of MT and OM can be calculated with the equilibrium adsorption capacity according to the binary adsorption curves (Table ).…”

Section: Results and Discussionmentioning

confidence: 99%

Synthesis of Acryl Group-Modified Adsorption Resins and Their Adsorption Properties for Matrine and Oxymatrine in Aqueous Solutions

Sun

et al. 2020

ACS Omega

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Three series of resins with different functional groups (PS-EA, PS-MP, and PS-BA) based on D101 copolymer were prepared via the atom transfer radical polymerization method. The adsorption capacities of functionalized resins toward matrine (MT) and oxymatrine (OM) depended on the specific surface area, the surface chemistry, and the good polarity match between the target compound and porous material. It is noted that the accumulation of functional groups uploaded on the surface of resins increased the adsorption affinity difference between the MT-functionalized resin system and OM-modified copolymer system. The selectivity of modified resins to MT and OM would attribute to polarity matching. The results could provide a possible strategy for the design of efficient adsorbents applied for the isolation the bioactive compound from complex natural products.

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Binary adsorption equilibrium and breakthrough of toluene and cyclohexane on macroporous and hypercrosslinked polymeric resins

Cited by 27 publications

References 34 publications

Enthalpic and Liquid-Phase Adsorption Study of Toluene–Cyclohexane and Toluene–Hexane Binary Systems on Modified Activated Carbons

Enthalpic and Liquid-Phase Adsorption Study of Toluene–Cyclohexane and Toluene–Hexane Binary Systems on Modified Activated Carbons

Enhanced selective adsorption of cation organic dyes on polyvinyl alcohol/agar/maltodextrin water‐resistance biomembrane

Synthesis of Acryl Group-Modified Adsorption Resins and Their Adsorption Properties for Matrine and Oxymatrine in Aqueous Solutions

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