Adsorption of NH4 +-N and E. coli onto Mg2+-modified zeolites

Sang Woo An, Young Cheol Jeong, Hyun Hee Cho, Jae Woo Park

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Mg2+-modified zeolites (MMZs) were used for the adsorption of NH4 +-N and Esherichia coli at different concentrations for a batch experiment. The adsorption characteristics (i.e. kinetics, isotherms, and mechanisms) of NH4 +-N and E. coli on natural zeolites and MMZs were studied. Simple kinetic models, including pseudo-first-order kinetic models and pseudo-second-order kinetic models, were used to model the adsorption mechanism. Adsorption of NH4+-N and E. coli followed a pseudo-second-order kinetic model with the pseudo-second-order kinetic constants (k2) increasing with an initial increase in NH4 +-N and E. coli concentrations. An intraparticle diffusion model was also used to investigate the mechanism of adsorption. From the intraparticle diffusion model results, NH4 +-N and E. coli adsorption onto natural zeolites and MMZs could be described via film diffusion followed by particle diffusion. Furthermore, film diffusion was the rate-determining step in NH4 +-N adsorption and particle diffusion was the rate-determining step in E. coli adsorption on natural zeolites and MMZs in this study. The maximum adsorption of NH4 +-N and E. coli onto MMZs was 7.759 and 0.175 mg/g, respectively. Greater E. coli adsorption onto MMZs was due to the unique surface properties of the material compared with natural zeolites. Electrostatic interactions and hydrophobic attractions simultaneously affected the adsorption of E. coli onto MMZ in this study. Therefore, MMZ can be an efficient adsorbent material for the simultaneous removal of NH4 +-N and E. coli from carcass leachates.

Original languageEnglish
Article number437
Pages (from-to)1-11
Number of pages11
JournalEnvironmental Earth Sciences
Volume75
Issue number5
DOIs
StatePublished - 2016 Mar 1

Fingerprint

zeolites
Zeolites
Escherichia coli
adsorption
Adsorption
kinetics
Kinetics
films (materials)
electrostatic interactions
adsorbents
leachates
Coulomb interactions
leachate
Adsorbents
Surface properties
isotherm
Isotherms

Keywords

  • Adsorption
  • E. coli
  • Mg-modified zeolite
  • NH -N
  • Natural zeolite

Cite this

An, Sang Woo ; Jeong, Young Cheol ; Cho, Hyun Hee ; Park, Jae Woo. / Adsorption of NH4 +-N and E. coli onto Mg2+-modified zeolites. In: Environmental Earth Sciences. 2016 ; Vol. 75, No. 5. pp. 1-11.
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Adsorption of NH4 +-N and E. coli onto Mg2+-modified zeolites. / An, Sang Woo; Jeong, Young Cheol; Cho, Hyun Hee; Park, Jae Woo.

In: Environmental Earth Sciences, Vol. 75, No. 5, 437, 01.03.2016, p. 1-11.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Adsorption of NH4 +-N and E. coli onto Mg2+-modified zeolites

AU - An, Sang Woo

AU - Jeong, Young Cheol

AU - Cho, Hyun Hee

AU - Park, Jae Woo

PY - 2016/3/1

Y1 - 2016/3/1

N2 - Mg2+-modified zeolites (MMZs) were used for the adsorption of NH4 +-N and Esherichia coli at different concentrations for a batch experiment. The adsorption characteristics (i.e. kinetics, isotherms, and mechanisms) of NH4 +-N and E. coli on natural zeolites and MMZs were studied. Simple kinetic models, including pseudo-first-order kinetic models and pseudo-second-order kinetic models, were used to model the adsorption mechanism. Adsorption of NH4+-N and E. coli followed a pseudo-second-order kinetic model with the pseudo-second-order kinetic constants (k2) increasing with an initial increase in NH4 +-N and E. coli concentrations. An intraparticle diffusion model was also used to investigate the mechanism of adsorption. From the intraparticle diffusion model results, NH4 +-N and E. coli adsorption onto natural zeolites and MMZs could be described via film diffusion followed by particle diffusion. Furthermore, film diffusion was the rate-determining step in NH4 +-N adsorption and particle diffusion was the rate-determining step in E. coli adsorption on natural zeolites and MMZs in this study. The maximum adsorption of NH4 +-N and E. coli onto MMZs was 7.759 and 0.175 mg/g, respectively. Greater E. coli adsorption onto MMZs was due to the unique surface properties of the material compared with natural zeolites. Electrostatic interactions and hydrophobic attractions simultaneously affected the adsorption of E. coli onto MMZ in this study. Therefore, MMZ can be an efficient adsorbent material for the simultaneous removal of NH4 +-N and E. coli from carcass leachates.

AB - Mg2+-modified zeolites (MMZs) were used for the adsorption of NH4 +-N and Esherichia coli at different concentrations for a batch experiment. The adsorption characteristics (i.e. kinetics, isotherms, and mechanisms) of NH4 +-N and E. coli on natural zeolites and MMZs were studied. Simple kinetic models, including pseudo-first-order kinetic models and pseudo-second-order kinetic models, were used to model the adsorption mechanism. Adsorption of NH4+-N and E. coli followed a pseudo-second-order kinetic model with the pseudo-second-order kinetic constants (k2) increasing with an initial increase in NH4 +-N and E. coli concentrations. An intraparticle diffusion model was also used to investigate the mechanism of adsorption. From the intraparticle diffusion model results, NH4 +-N and E. coli adsorption onto natural zeolites and MMZs could be described via film diffusion followed by particle diffusion. Furthermore, film diffusion was the rate-determining step in NH4 +-N adsorption and particle diffusion was the rate-determining step in E. coli adsorption on natural zeolites and MMZs in this study. The maximum adsorption of NH4 +-N and E. coli onto MMZs was 7.759 and 0.175 mg/g, respectively. Greater E. coli adsorption onto MMZs was due to the unique surface properties of the material compared with natural zeolites. Electrostatic interactions and hydrophobic attractions simultaneously affected the adsorption of E. coli onto MMZ in this study. Therefore, MMZ can be an efficient adsorbent material for the simultaneous removal of NH4 +-N and E. coli from carcass leachates.

KW - Adsorption

KW - E. coli

KW - Mg-modified zeolite

KW - NH -N

KW - Natural zeolite

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U2 - 10.1007/s12665-016-5476-x

DO - 10.1007/s12665-016-5476-x

M3 - Article

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