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Removal of lead from aqueous solution using superparamagnetic palygorskite nanocomposite: Material characterization and regeneration studies

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Removal of lead from aqueous solution using superparamagnetic palygorskite nanocomposite : Material characterization and regeneration studies. / Rusmin, Ruhaida; Sarkar, Binoy; Tsuzuki, Takuya et al.

In: Chemosphere, Vol. 186, 30.11.2017, p. 1006-1015.

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Rusmin R, Sarkar B, Tsuzuki T, Kawashima N, Naidu R. Removal of lead from aqueous solution using superparamagnetic palygorskite nanocomposite: Material characterization and regeneration studies. Chemosphere. 2017 Nov 30;186:1006-1015. Epub 2017 Aug 13. doi: 10.1016/j.chemosphere.2017.08.036

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@article{dc63153858b646eba8b376101f730d7a,
title = "Removal of lead from aqueous solution using superparamagnetic palygorskite nanocomposite: Material characterization and regeneration studies",
abstract = "A palygorskite-iron oxide nanocomposite (Pal-IO) was synthesized in situ by embedding magnetite into the palygorskite structure through co-precipitation method. The physico-chemical characteristics of Pal-IO and their pristine components were examined through various spectroscopic and micro-analytical techniques. Batch adsorption experiments were conducted to evaluate the performance of Pal-IO in removing Pb(II) from aqueous solution. The surface morphology, magnetic recyclability and adsorption efficiency of regenerated Pal-IO using desorbing agents HCl (Pal-IO-HCl) and ethylenediaminetetraacetic acid disodium salt (EDTA-Na2) (Pal-IO-EDTA) were compared. The nanocomposite showed a superparamagnetic property (magnetic susceptibility: 20.2 emu g−1) with higher specific surface area (99.8 m2 g−1) than the pristine palygorskite (49.4 m2 g−1) and iron oxide (72.6 m2 g−1). Pal-IO showed a maximum Pb(II) adsorption capacity of 26.6 mg g−1 (experimental condition: 5 g L−1 adsorbent loading, 150 agitations min−1, initial Pb(II) concentration from 20 to 500 mg L−1, at 25 °C) with easy separation of the spent adsorbent. The adsorption data best fitted to the Langmuir isotherm model (R2 = 0.9995) and pseudo-second order kinetic model (R2 = 0.9945). Pb(II) desorption using EDTA as the complexing agent produced no disaggregation of Pal-IO crystal bundles, and was able to preserve the composite's magnetic recyclability. Pal-IO-EDTA exhibited almost 64% removal capacity after three cycles of regeneration and preserved the nanocomposite's structural integrity and magnetic properties (15.6 emu g−1). The nanocomposite holds advantages as a sustainable material (easily separable and recyclable) for potential application in purifying heavy metal contaminated wastewaters.",
keywords = "Desorption, Lead contamination, Magnetic separation, Palygorskite-iron oxide nanocomposite, Regeneration",
author = "Ruhaida Rusmin and Binoy Sarkar and Takuya Tsuzuki and Nobuyuki Kawashima and Ravi Naidu",
year = "2017",
month = nov,
day = "30",
doi = "10.1016/j.chemosphere.2017.08.036",
language = "English",
volume = "186",
pages = "1006--1015",
journal = "Chemosphere",
issn = "0045-6535",
publisher = "NLM (Medline)",

}

RIS

TY - JOUR

T1 - Removal of lead from aqueous solution using superparamagnetic palygorskite nanocomposite

T2 - Material characterization and regeneration studies

AU - Rusmin, Ruhaida

AU - Sarkar, Binoy

AU - Tsuzuki, Takuya

AU - Kawashima, Nobuyuki

AU - Naidu, Ravi

PY - 2017/11/30

Y1 - 2017/11/30

N2 - A palygorskite-iron oxide nanocomposite (Pal-IO) was synthesized in situ by embedding magnetite into the palygorskite structure through co-precipitation method. The physico-chemical characteristics of Pal-IO and their pristine components were examined through various spectroscopic and micro-analytical techniques. Batch adsorption experiments were conducted to evaluate the performance of Pal-IO in removing Pb(II) from aqueous solution. The surface morphology, magnetic recyclability and adsorption efficiency of regenerated Pal-IO using desorbing agents HCl (Pal-IO-HCl) and ethylenediaminetetraacetic acid disodium salt (EDTA-Na2) (Pal-IO-EDTA) were compared. The nanocomposite showed a superparamagnetic property (magnetic susceptibility: 20.2 emu g−1) with higher specific surface area (99.8 m2 g−1) than the pristine palygorskite (49.4 m2 g−1) and iron oxide (72.6 m2 g−1). Pal-IO showed a maximum Pb(II) adsorption capacity of 26.6 mg g−1 (experimental condition: 5 g L−1 adsorbent loading, 150 agitations min−1, initial Pb(II) concentration from 20 to 500 mg L−1, at 25 °C) with easy separation of the spent adsorbent. The adsorption data best fitted to the Langmuir isotherm model (R2 = 0.9995) and pseudo-second order kinetic model (R2 = 0.9945). Pb(II) desorption using EDTA as the complexing agent produced no disaggregation of Pal-IO crystal bundles, and was able to preserve the composite's magnetic recyclability. Pal-IO-EDTA exhibited almost 64% removal capacity after three cycles of regeneration and preserved the nanocomposite's structural integrity and magnetic properties (15.6 emu g−1). The nanocomposite holds advantages as a sustainable material (easily separable and recyclable) for potential application in purifying heavy metal contaminated wastewaters.

AB - A palygorskite-iron oxide nanocomposite (Pal-IO) was synthesized in situ by embedding magnetite into the palygorskite structure through co-precipitation method. The physico-chemical characteristics of Pal-IO and their pristine components were examined through various spectroscopic and micro-analytical techniques. Batch adsorption experiments were conducted to evaluate the performance of Pal-IO in removing Pb(II) from aqueous solution. The surface morphology, magnetic recyclability and adsorption efficiency of regenerated Pal-IO using desorbing agents HCl (Pal-IO-HCl) and ethylenediaminetetraacetic acid disodium salt (EDTA-Na2) (Pal-IO-EDTA) were compared. The nanocomposite showed a superparamagnetic property (magnetic susceptibility: 20.2 emu g−1) with higher specific surface area (99.8 m2 g−1) than the pristine palygorskite (49.4 m2 g−1) and iron oxide (72.6 m2 g−1). Pal-IO showed a maximum Pb(II) adsorption capacity of 26.6 mg g−1 (experimental condition: 5 g L−1 adsorbent loading, 150 agitations min−1, initial Pb(II) concentration from 20 to 500 mg L−1, at 25 °C) with easy separation of the spent adsorbent. The adsorption data best fitted to the Langmuir isotherm model (R2 = 0.9995) and pseudo-second order kinetic model (R2 = 0.9945). Pb(II) desorption using EDTA as the complexing agent produced no disaggregation of Pal-IO crystal bundles, and was able to preserve the composite's magnetic recyclability. Pal-IO-EDTA exhibited almost 64% removal capacity after three cycles of regeneration and preserved the nanocomposite's structural integrity and magnetic properties (15.6 emu g−1). The nanocomposite holds advantages as a sustainable material (easily separable and recyclable) for potential application in purifying heavy metal contaminated wastewaters.

KW - Desorption

KW - Lead contamination

KW - Magnetic separation

KW - Palygorskite-iron oxide nanocomposite

KW - Regeneration

U2 - 10.1016/j.chemosphere.2017.08.036

DO - 10.1016/j.chemosphere.2017.08.036

M3 - Journal article

C2 - 28838038

AN - SCOPUS:85027843092

VL - 186

SP - 1006

EP - 1015

JO - Chemosphere

JF - Chemosphere

SN - 0045-6535

ER -