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Highly-efficient removal of Pb(II), Cu(II) and Cd(II) from water by novel lithium, sodium and potassium titanate reusable microrods

Motlochová, Monika LU ; Slovák, Václav ; Pližingrová, Eva ; Lidin, Sven LU and Šubrt, Jan (2020) In RSC Advances 10(7). p.3694-3704
Abstract

In this work, we report on the efficient removal of heavy metal ions with nanostructured lithium, sodium and potassium titanates from simulated wastewater. The titanates were obtained via a fast, easy and cost effective process based on extraction of sulfate ions from the crystals of titanyl sulfate and their replacement with hydroxyl groups of NaOH, LiOH and KOH solutions leaving the Ti-O framework intact. The as-prepared titanates were carefully examined by scanning and transmission electron microscopy. Furthermore, the effect of contact time, pH, annealing temperature, together with adsorption in real conditions including competitive adsorption and reusability were studied. It was found that the maximum adsorption capacity, as... (More)

In this work, we report on the efficient removal of heavy metal ions with nanostructured lithium, sodium and potassium titanates from simulated wastewater. The titanates were obtained via a fast, easy and cost effective process based on extraction of sulfate ions from the crystals of titanyl sulfate and their replacement with hydroxyl groups of NaOH, LiOH and KOH solutions leaving the Ti-O framework intact. The as-prepared titanates were carefully examined by scanning and transmission electron microscopy. Furthermore, the effect of contact time, pH, annealing temperature, together with adsorption in real conditions including competitive adsorption and reusability were studied. It was found that the maximum adsorption capacity, as calculated from the Langmuir adsorption model, is up to 3.8 mmol Pb(ii) per g, 3.6 mmol Cu(ii) per g and 2.3 mmol Cd(ii) per g. Based on the characterization results, a possible mechanism for heavy metal removal was proposed. This work provides a very efficient, fast and convenient approach for exploring promising materials for water treatment.

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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
RSC Advances
volume
10
issue
7
pages
11 pages
publisher
Royal Society of Chemistry
external identifiers
  • scopus:85078696488
ISSN
2046-2069
DOI
10.1039/c9ra08737k
language
English
LU publication?
yes
id
c38ff59d-a76c-4aa0-a71f-57c3d99e73e2
date added to LUP
2020-02-13 15:09:54
date last changed
2023-11-19 23:58:29
@article{c38ff59d-a76c-4aa0-a71f-57c3d99e73e2,
  abstract     = {{<p>In this work, we report on the efficient removal of heavy metal ions with nanostructured lithium, sodium and potassium titanates from simulated wastewater. The titanates were obtained via a fast, easy and cost effective process based on extraction of sulfate ions from the crystals of titanyl sulfate and their replacement with hydroxyl groups of NaOH, LiOH and KOH solutions leaving the Ti-O framework intact. The as-prepared titanates were carefully examined by scanning and transmission electron microscopy. Furthermore, the effect of contact time, pH, annealing temperature, together with adsorption in real conditions including competitive adsorption and reusability were studied. It was found that the maximum adsorption capacity, as calculated from the Langmuir adsorption model, is up to 3.8 mmol Pb(ii) per g, 3.6 mmol Cu(ii) per g and 2.3 mmol Cd(ii) per g. Based on the characterization results, a possible mechanism for heavy metal removal was proposed. This work provides a very efficient, fast and convenient approach for exploring promising materials for water treatment.</p>}},
  author       = {{Motlochová, Monika and Slovák, Václav and Pližingrová, Eva and Lidin, Sven and Šubrt, Jan}},
  issn         = {{2046-2069}},
  language     = {{eng}},
  month        = {{01}},
  number       = {{7}},
  pages        = {{3694--3704}},
  publisher    = {{Royal Society of Chemistry}},
  series       = {{RSC Advances}},
  title        = {{Highly-efficient removal of Pb(II), Cu(II) and Cd(II) from water by novel lithium, sodium and potassium titanate reusable microrods}},
  url          = {{http://dx.doi.org/10.1039/c9ra08737k}},
  doi          = {{10.1039/c9ra08737k}},
  volume       = {{10}},
  year         = {{2020}},
}