A comparative adsorption study of β-naphthol on four polymeric adsorbents from aqueous solutions

Jianhan Huang, Bin Yuan, Xiaofei Wu, Shuguang Deng

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Adsorptive removal of aromatic compounds from aqueous solutions by polymeric adsorbents has attracted many concerns in recent years. A comparative adsorption study including equilibria, kinetics and column dynamics of β-naphthol from aqueous solutions was carried out using two hypercrosslinked polymeric adsorbents (HJ-1 and TEPA) we developed and two commercial polymeric adsorbents (XAD-4 and XAD-7). The adsorption isotherms could be well described by the Freundlich equation, and the adsorption equilibrium capacities of β-naphthol followed an order of q e(TEPA)>q e(HJ-1)>q e(XAD-4)>q e(XAD-7). The isosteric adsorption enthalpies on HJ-1 and TEPA decreased with increasing adsorption fractional loading, while a constant enthalpy was observed for XAD-4 and XAD-7, implying that HJ-1 and TEPA had a heterogeneous surface while XAD-4 and XAD-7 possessed a homogenous surface. The surface energetic heterogeneity of HJ-1 and TEPA could be well characterized by the Do's model. The adsorption kinetics were fitted by both pseudo-first-order and pseudo-second-order rate equations, and the intra-particle diffusion was found to be the rate-limiting step. The adsorption breakthrough data were well correlated by the Thomas and Clark models, and the dynamic capacities for TEPA, HJ-1, XAD-4 and XAD-7 adsorbents were calculated to be 341.7, 321.6, 268.0 and 173.8mg/g dry resin, which were within 90% of the corresponding equilibrium capacities obtained in the batch experiments.

Original languageEnglish (US)
Pages (from-to)166-172
Number of pages7
JournalJournal of Colloid and Interface Science
Volume380
Issue number1
DOIs
StatePublished - Aug 15 2012
Externally publishedYes

Fingerprint

Triethylenephosphoramide
Naphthols
Naphthol
Adsorbents
Adsorption
Enthalpy
Kinetics
Aromatic compounds
Adsorption isotherms
Resins
amberlite XAD 7

Keywords

  • Adsorption
  • Column dynamics
  • Equilibria
  • Isosteric adsorption enthalpy
  • Kinetics

ASJC Scopus subject areas

  • Surfaces, Coatings and Films
  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Colloid and Surface Chemistry

Cite this

A comparative adsorption study of β-naphthol on four polymeric adsorbents from aqueous solutions. / Huang, Jianhan; Yuan, Bin; Wu, Xiaofei; Deng, Shuguang.

In: Journal of Colloid and Interface Science, Vol. 380, No. 1, 15.08.2012, p. 166-172.

Research output: Contribution to journalArticle

@article{ac244d1222d048cc84c9d2bc27a24430,
title = "A comparative adsorption study of β-naphthol on four polymeric adsorbents from aqueous solutions",
abstract = "Adsorptive removal of aromatic compounds from aqueous solutions by polymeric adsorbents has attracted many concerns in recent years. A comparative adsorption study including equilibria, kinetics and column dynamics of β-naphthol from aqueous solutions was carried out using two hypercrosslinked polymeric adsorbents (HJ-1 and TEPA) we developed and two commercial polymeric adsorbents (XAD-4 and XAD-7). The adsorption isotherms could be well described by the Freundlich equation, and the adsorption equilibrium capacities of β-naphthol followed an order of q e(TEPA)>q e(HJ-1)>q e(XAD-4)>q e(XAD-7). The isosteric adsorption enthalpies on HJ-1 and TEPA decreased with increasing adsorption fractional loading, while a constant enthalpy was observed for XAD-4 and XAD-7, implying that HJ-1 and TEPA had a heterogeneous surface while XAD-4 and XAD-7 possessed a homogenous surface. The surface energetic heterogeneity of HJ-1 and TEPA could be well characterized by the Do's model. The adsorption kinetics were fitted by both pseudo-first-order and pseudo-second-order rate equations, and the intra-particle diffusion was found to be the rate-limiting step. The adsorption breakthrough data were well correlated by the Thomas and Clark models, and the dynamic capacities for TEPA, HJ-1, XAD-4 and XAD-7 adsorbents were calculated to be 341.7, 321.6, 268.0 and 173.8mg/g dry resin, which were within 90{\%} of the corresponding equilibrium capacities obtained in the batch experiments.",
keywords = "Adsorption, Column dynamics, Equilibria, Isosteric adsorption enthalpy, Kinetics",
author = "Jianhan Huang and Bin Yuan and Xiaofei Wu and Shuguang Deng",
year = "2012",
month = "8",
day = "15",
doi = "10.1016/j.jcis.2012.05.022",
language = "English (US)",
volume = "380",
pages = "166--172",
journal = "Journal of Colloid and Interface Science",
issn = "0021-9797",
publisher = "Academic Press Inc.",
number = "1",

}

TY - JOUR

T1 - A comparative adsorption study of β-naphthol on four polymeric adsorbents from aqueous solutions

AU - Huang, Jianhan

AU - Yuan, Bin

AU - Wu, Xiaofei

AU - Deng, Shuguang

PY - 2012/8/15

Y1 - 2012/8/15

N2 - Adsorptive removal of aromatic compounds from aqueous solutions by polymeric adsorbents has attracted many concerns in recent years. A comparative adsorption study including equilibria, kinetics and column dynamics of β-naphthol from aqueous solutions was carried out using two hypercrosslinked polymeric adsorbents (HJ-1 and TEPA) we developed and two commercial polymeric adsorbents (XAD-4 and XAD-7). The adsorption isotherms could be well described by the Freundlich equation, and the adsorption equilibrium capacities of β-naphthol followed an order of q e(TEPA)>q e(HJ-1)>q e(XAD-4)>q e(XAD-7). The isosteric adsorption enthalpies on HJ-1 and TEPA decreased with increasing adsorption fractional loading, while a constant enthalpy was observed for XAD-4 and XAD-7, implying that HJ-1 and TEPA had a heterogeneous surface while XAD-4 and XAD-7 possessed a homogenous surface. The surface energetic heterogeneity of HJ-1 and TEPA could be well characterized by the Do's model. The adsorption kinetics were fitted by both pseudo-first-order and pseudo-second-order rate equations, and the intra-particle diffusion was found to be the rate-limiting step. The adsorption breakthrough data were well correlated by the Thomas and Clark models, and the dynamic capacities for TEPA, HJ-1, XAD-4 and XAD-7 adsorbents were calculated to be 341.7, 321.6, 268.0 and 173.8mg/g dry resin, which were within 90% of the corresponding equilibrium capacities obtained in the batch experiments.

AB - Adsorptive removal of aromatic compounds from aqueous solutions by polymeric adsorbents has attracted many concerns in recent years. A comparative adsorption study including equilibria, kinetics and column dynamics of β-naphthol from aqueous solutions was carried out using two hypercrosslinked polymeric adsorbents (HJ-1 and TEPA) we developed and two commercial polymeric adsorbents (XAD-4 and XAD-7). The adsorption isotherms could be well described by the Freundlich equation, and the adsorption equilibrium capacities of β-naphthol followed an order of q e(TEPA)>q e(HJ-1)>q e(XAD-4)>q e(XAD-7). The isosteric adsorption enthalpies on HJ-1 and TEPA decreased with increasing adsorption fractional loading, while a constant enthalpy was observed for XAD-4 and XAD-7, implying that HJ-1 and TEPA had a heterogeneous surface while XAD-4 and XAD-7 possessed a homogenous surface. The surface energetic heterogeneity of HJ-1 and TEPA could be well characterized by the Do's model. The adsorption kinetics were fitted by both pseudo-first-order and pseudo-second-order rate equations, and the intra-particle diffusion was found to be the rate-limiting step. The adsorption breakthrough data were well correlated by the Thomas and Clark models, and the dynamic capacities for TEPA, HJ-1, XAD-4 and XAD-7 adsorbents were calculated to be 341.7, 321.6, 268.0 and 173.8mg/g dry resin, which were within 90% of the corresponding equilibrium capacities obtained in the batch experiments.

KW - Adsorption

KW - Column dynamics

KW - Equilibria

KW - Isosteric adsorption enthalpy

KW - Kinetics

UR - http://www.scopus.com/inward/record.url?scp=84862836145&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84862836145&partnerID=8YFLogxK

U2 - 10.1016/j.jcis.2012.05.022

DO - 10.1016/j.jcis.2012.05.022

M3 - Article

C2 - 22658355

AN - SCOPUS:84862836145

VL - 380

SP - 166

EP - 172

JO - Journal of Colloid and Interface Science

JF - Journal of Colloid and Interface Science

SN - 0021-9797

IS - 1

ER -