Phenol-modified hyper-cross-linked resins with almost all micro/mesopores and their adsorption to aniline

Kuang, Wei; Liu, You-Nian; Huang, Jianhan

doi:10.1016/j.jcis.2016.09.076

Cited by 75 publications

(31 citation statements)

References 39 publications

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“…Here, K F [(mg/g) (L/mg) 1/ n ] and n are the Freundlich constants, which can be seen as a manifestation of favorable adsorption and adsorption capacity. From the parameters of the isotherm models, in comparison, the correlation coefficient of the Temkin model ( R 2 > 0.97) is inferior; both the Langmuir and Freundlich models can describe the adsorption process well, while the Freundlich model ( R 2 > 0.996) was more appropriate for fitting the isotherm data than the Langmuir model ( R 2 > 0.98), and the n values ( n > 1) indicated a favorable adsorption process . The Freundlich isotherm with better correlation coefficients also assumed that the adsorption process was on a heterogeneous surface .…”

Section: Resultsmentioning

confidence: 99%

“…In addition, q t (mg/g) is the adsorption capacity at contact time t (min), and the obtained method is the same as the equilibrium adsorption capacity. The Volhard method was adopted to determine the chlorine content …”

Section: Methodsmentioning

confidence: 99%

“…They are so hard to regenerate that activated carbon cannot meet the requirements of reuse . Therefore, the resin adsorption method with good regenerability has become the most appropriate choice …”

Section: Introductionmentioning

confidence: 99%

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Comparative study of adsorption for m‐phenylenediamine in aqueous solution onto chemically modified resins

Wang

Liu

et al. 2018

J of Applied Polymer Sci

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Four kinds of hypercrosslinked resins (acidic resins labeled SAMR and TAMR and heterocyclic resins IDLMR and PRLMR) were synthesized as adsorbents to remove m-phenylenediamine (MPD) from aqueous solution comparably. The Brunauer-Emmett-Teller specific surface area and pore size distribution of the two types of resins have been compared, and the infrared spectra of the resins confirm the presence of the modified groups. The adsorption isotherms illustrate that the Freundlich equation fits more appropriately than the Langmuir equation or the Temkin equation. In addition, the kinetic curves indicate that the pseudo-second-order model is a better fit than the pseudo-first-order model. The thermodynamic studies show that the isosteric adsorption enthalpy changes (ΔH) and the Gibbs free energy change (ΔG) are both negative, revealing that all of the adsorption processes are spontaneous and exothermic. All of the modified resins exhibit the best adsorption capacity at pH = 6.24. The results show that the acidic resins have better adsorption of MPD.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Comparative study of adsorption for m‐phenylenediamine in aqueous solution onto chemically modified resins

Wang

Liu

et al. 2018

J of Applied Polymer Sci

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“…The presence of various types of polar and active functional groups in the modified sorbent is expected to provide ionexchange characteristics to adsorb polar, non-polar, neutral, and cationic compounds simultaneously from the aqueous media (15). The introduction of polar groups can enhance the hydrophilicity of the materials (24). The hydrophilic sorbents can be prepared either by copolymerization of the functional monomers or by chemically modifying the hydrophobic polymers with polar moieties, before or after the hypercrosslinking reaction.…”

Section: Introductionmentioning

confidence: 99%

The synthesis and characterisation of porous and monodisperse, chemically modified hypercrosslinked poly(acrylonitrile)-based terpolymer as a sorbent for the adsorption of acidic pharmaceuticals

et al. 2020

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AbstractThe synthesis and characterization of porous poly(acrylonitrile(AN)-co-divinylbenzene-80 (DVB-80)-co-vinylbenzylchloride (VBC)) polymers with high specific surface areas and weak anion-exchange character have been successfully researched. The hypercrosslinked (HXL) microspheres were chemically modified with 1,2-ethylenediamine (EDA) to enhance the adsorption selectivity of the HXL materials. The zeta potential of EDA-modified HXL poly(AN-co-DVB-80-co-VBC) revealed that the surface of the modified terpolymer was positively charged. The FT-IR spectra of the chemically modified hypercrosslinked poly(AN-co-DVB-80-co-VBC) showed that the nitrile groups derived from the AN unit were utilised by the presence of diamine groups. The BET-specific surface areas of the EDA-modified hypercrosslinked poly(AN-co-DVB-80-co-VBC) was 503 m2 g−1; meanwhile, the specific surface area of the HXL terpolymer was 983 m2 g−1. The adsorption isotherm data were well fitted by both the Langmuir and Freundlich models, whereas the adsorption kinetics followed the pseudo-second-order kinetic model. This study confirms that the EDA-modified hypercrosslinked poly(AN-co-DVB-80-co-VBC) terpolymer is a potential adsorbent for the adsorption of acidic pharmaceuticals.

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“…Las áreas superficiales específicas obtenidas para la resina RPD y RPS se muestran en la tabla 5. En ambos casos el ASS fue alta, lo cual es consistente con diversos autores que han trabajado con resinas hiperentrecruzadas; éstos han reportado valores superiores a 700 m 2 g -1 , determinada mediante el método de BET (Kuang, Liu, & Huang, 2017;Zhang, Li, Sun, & Li, 2013). La resina RPD presentó un valor ligeramente mayor en comparación con la resina RPS; esta disminución en el valor del ASS puede ser debido a la estructura de la sulfobetaína, ya que puede generar interacciones internas dentro de la estructura que disminuyan la disponibilidad para interactuar con las moléculas del disolvente polar.…”

Section: Determinación De áRea Superficial Específica (Ass) Por El Méunclassified

Evaluación teórico-experimental del proceso de adsorción de oxianiones de cromo y arsénico en resinas porosas altamente entrecruzadas utilizando un modelo hidrogeoquímico

Martínez

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Síntesis de resinas hiper entrecruzadas macroporosas. ……… 6.2. Análisis de la morfología superficial mediante Microscopia Electrónica de Barrido (MEB). ………………………………………. 6.3. Determinación de área superficial específica (ASS). ………… 6.4. Prueba de adsorción a diferentes pH. …………………………….. 6.5. Isotermas de adsorción con Cr(VI) y As(V). ……………………… 6.6. Cinética de adsorción. ……………………………………………….. 6.7. Cuantificación de Cr(VI) mediante el método colorimétrico…… 6.8. Cuantificación de As total por medio de absorción atómica con horno de grafito. ……………………………………………….. 6.9. Caracterización superficial por medio de las titulaciones potenciométricas. ……………………………………………………... 6.10. Modelación hidrogeoquímica. ……………………………………... 7. RESULTADOS Y DISCUSIÓN. ………………………………………………. 7.1. Síntesis de las resinas hiper-entrecruzadas macroporosas. …. 7.2. Estudios con microscopia electrónica de barrido. ……………… 7.3. Determinación de área superficial específica (ASS) por el método de EGME. ………………..……………………………………. 7.4. Cineticas de adsorción. ………………….……………….…………. 7.4.1. Cinéticas de adsorción para cromo. …………………………… 7.4.2. Cinéticas de adsorción para. …………………………………… 7.5. Isotermas de adsorción y modelos empíricos………………….. 7.5.1. Capacidad de adsorción de Cromo. …………………………. 7.5.2. Capacidad de adsorción Arsénico. …………………………… 7.6. Caracterización por medio de titulaciones potenciométricas. 7.6.1. Determinación de la concentración de sitios activos. …. 7.6.2. Determinación de la densidad de carga superficial neta por protones y punto de carga cero. ………………………….. 90 7.7. Pruebas de adsorción en función del pH y fuerza iónica y modelación hidrogeoquímica ………………..…………………….

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Phenol-modified hyper-cross-linked resins with almost all micro/mesopores and their adsorption to aniline

Cited by 75 publications

References 39 publications

Comparative study of adsorption for m‐phenylenediamine in aqueous solution onto chemically modified resins

Comparative study of adsorption for m‐phenylenediamine in aqueous solution onto chemically modified resins

The synthesis and characterisation of porous and monodisperse, chemically modified hypercrosslinked poly(acrylonitrile)-based terpolymer as a sorbent for the adsorption of acidic pharmaceuticals

Evaluación teórico-experimental del proceso de adsorción de oxianiones de cromo y arsénico en resinas porosas altamente entrecruzadas utilizando un modelo hidrogeoquímico

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