Differences in the removal mechanisms of Undaria pinnatifida and Phragmites australis as biomaterials for lead removal

Paula Cecilia Soto-Rios, Kazunori Nakano, Marco Leon-Romero, Yoshio Aikawa, Shigeyuki Arai, Osamu Nishimura

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

This study offers the opportunity to utilize Undaria pinnatifida and Phragmites australis to remove lead from water in permeable reactive barrier (PRB) technology. Its efficacy was tested using batch experiments and PRB column systems. From the batch experiment results, a higher adsorption capacity was observed for Undaria pinnatifida. Nevertheless, Phragmites australis in the column system efficiently removed lead and the breakthrough occurred at the same time for both biomaterials. To dissipate this difference, a sequential extraction for metal speciation analysis was used for both columns. The results have shown that each biomaterial has a dominant mechanism. Phragmites australis removed lead by physical adsorption, whereas Undaria pinnatifida showed a higher tendency to bind lead due to organic matter, primary and secondary minerals.

Original languageEnglish
Pages (from-to)1226-1233
Number of pages8
JournalWater Science and Technology
Volume72
Issue number7
DOIs
Publication statusPublished - 2015

Keywords

  • Biomaterials
  • Heavy metals
  • Permeable reactive barriers

ASJC Scopus subject areas

  • Environmental Engineering
  • Water Science and Technology

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