Novel self-assembled 3D flower-like magnesium hydroxide coated granular polyurethane: Implication of its potential application for the removal of heavy metals

Mohsen Vafaeifard, Shaliza Ibrahim, Kien Tiek Wong, Pooria Pasbakhsh, Saravanan Pichiah, Jaeyoung Choi, Yeomin Yoon, Min Jang

Research output: Contribution to journalArticlepeer-review

38 Scopus citations

Abstract

Novel nanostructured three-dimensional flowerlike Mg(OH) 2 -incorporated granular polyurethane (designated as gPU-FMH) was prepared using a simple hydrothermal method, for which commercial MgO, water, and granular polyurethane (gPU) were applied. Interestingly, it is found that gPU and the hydrothermal process are the key factors for the assembly of the flowerlike structures of the Mg(OH) 2 , as its hexagonal nanosheet petals provide a high surface area. Temperature significantly controlled the morphologies of the flowerlike Mg(OH) 2 , and the granular gPU-FMH showed the superb adsorption capacities of 472, 1050, and 1293 mg g −1 (maximum adsorption capacities, q m , from Langmuir model) for Cu(II), Cd(II), and Pb(II), respectively. The proposed hypothesis for the synthesis of gPU-FMH and the removal mechanism of the heavy metals has been proved through various spectroscopic analyses. In the result of the continuous-flow column study, gPU-FMH showed a long breakthrough and a high removal capacity (184 mg g −1 ) of Cu(II).

Original languageEnglish
Pages (from-to)495-503
Number of pages9
JournalJournal of Cleaner Production
Volume216
DOIs
StatePublished - 10 Apr 2019

Bibliographical note

Funding Information:
The present study was funded by Korea Environment Industry & Technology Institute (Grant 2018002480006), the National Research Foundation (NRF-2017R1D1A1B03029441), and Seoul Green Environment Center (SGEC) in South Korea, and University of Malaya (UMRG, Sustainability Science, Project Number: RP010B-13SUS) in Malaysia.

Funding Information:
The present study was funded by Korea Environment Industry & Technology Institute (Grant 2018002480006 ), the National Research Foundation ( NRF-2017R1D1A1B03029441 ), and Seoul Green Environment Center (SGEC) in South Korea, and University of Malaya (UMRG, Sustainability Science, Project Number: RP010B-13SUS ) in Malaysia.

Publisher Copyright:
© 2018 Elsevier Ltd

Keywords

  • Flowerlike magnesium hydroxide
  • Heavy-metal remediation
  • Polyurethane
  • Self-assembling
  • Three-dimensional

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