Synthesis of diatom-FeOx composite for removing trace arsenic to meet drinking water standards

Megha Thakkar, Varunpreet Randhawa, Somenath Mitra, Liping Wei

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

This study presents the synthesis of diatom-FeOx composite as a novel sorbent for arsenic removal from water. The unique porous architecture of the diatom was utilized to immobilize iron oxide to form the composite. The surface area was as high as 70m2/g. The adsorption isotherms for As (III) and As (V) followed the Langmuir, Freundlich and D-R models. Langmuir monolayer adsorption capacity for arsenite (As III) was 10,000μg/g and arsenate (As V) was 12,500μg/g. The pseudo-second order rate equation was found to effectively describe the kinetics of arsenic adsorption. This study opens the door for the development of bio derived materials for environmental remediation.

Original languageEnglish (US)
Pages (from-to)169-173
Number of pages5
JournalJournal of Colloid And Interface Science
Volume457
DOIs
StatePublished - Nov 1 2015

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Surfaces, Coatings and Films
  • Colloid and Surface Chemistry

Keywords

  • Adsorption
  • Algae
  • Arsenic
  • Bionanocomposite
  • Diatom
  • Iron oxide

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