Nanocellulose-Reinforced Organo-Inorganic Nanocomposite for Synergistic and Affordable Defluoridation of Water and an Evaluation of Its Sustainability Metrics

Sritama Mukherjee, Haritha Ramireddy, Avijit Baidya, A. K. Amala, Chennu Sudhakar, Biswajit Mondal, Ligy Philip, Thalappil Pradeep*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

10 Citations (Scopus)

Abstract

Fluoride (F-) is one of the common naturally occurring anions present in groundwater worldwide that may be beneficial or detrimental depending on the total amount ingested and the duration of exposure. Among all the remediation techniques, adsorption using nanomaterials shows superior efficiency and the process can be eco-friendly and economical. We report cellulose nanofiber-polyaniline (PANI)-templated ferrihydrite nanocomposite synthesized by a green one-pot process where the iron precursor not only acts as an oxidant for the polymerization of aniline to give emaraldine base-emaraldine salt (EB-ES) form of PANI but also forms 2-line ferrihydrite (FeOOH) nanoparticles in situ. These nanoparticles get embedded into the cellulose-PANI blend to give a granular nanocomposite having double action sites for adsorption and robustness which also prevent nanoparticle leaching. Doped PANI and FeOOH act as synergistic adsorption sites for F- removal which results in an enhanced uptake capacity. The materials' adsorption mechanism and removal performance have been evaluated by diverse analytical techniques. The investigations led to the conclusion that the material is suitable to be used as adsorption media in the form of simple cartridges for gravity-fed water purification. In addition, the impact of such materials on the environment has been assessed by evaluating the relevant sustainability metrics and socio-economic parameters.

Original languageEnglish
Pages (from-to)139-147
Number of pages9
JournalACS Sustainable Chemistry and Engineering
Volume8
Issue number1
DOIs
Publication statusPublished - 13 Jan 2020
MoE publication typeA1 Journal article-refereed

Keywords

  • cellulose nanofiber
  • ferrihydrite
  • fluoride
  • polyaniline
  • sustainability metrics
  • synergy

Fingerprint

Dive into the research topics of 'Nanocellulose-Reinforced Organo-Inorganic Nanocomposite for Synergistic and Affordable Defluoridation of Water and an Evaluation of Its Sustainability Metrics'. Together they form a unique fingerprint.

Cite this