Equilibrium Modeling of Arsenic Adsorption in a Ternary Arsenic–Iron Oxide–Natural Organic Matter System

Hoda Fakour, Tsair Fuh Lin, Shang Lien Lo

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

The effect of natural organic matter (NOM) on the adsorption efficiency of arsenic (As) species by iron oxide-based adsorbent (IBA) under different concentrations was investigated. To evaluate the sorption of As in the presence of humic materials, simple isotherm curves should be replaced by three-dimensional sorption isotherm surfaces. In this study, a modified Langmuir-type model was developed to describe the isotherm surfaces. The proposed model showed satisfactory predictions for the As uptake in different scenarios with the presence of As(V)/(III), organic matter fractions, and model adsorbent. The isotherms indicated a competitive uptake of the As species and humic substances, causing that less As was adsorbed on the adsorbent. The developed model for the ternary sorption system enabled quantitative estimation of As sorption onto iron oxide based adsorbents in complex natural water systems.

Original languageEnglish
Pages (from-to)1287-1295
Number of pages9
JournalClean - Soil, Air, Water
Volume44
Issue number10
DOIs
Publication statusPublished - 2016 Oct 1

All Science Journal Classification (ASJC) codes

  • Environmental Chemistry
  • Water Science and Technology
  • Pollution

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