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.
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Research Article|
June 29 2015
Differences in the removal mechanisms of Undaria pinnatifida and Phragmites australis as biomaterials for lead removal
Paula Cecilia Soto-Rios;
1Ecological Engineering Laboratory, Graduate School of Engineering, Tohoku University, Tohoku 980-8579, Japan
E-mail: cecisoto@eco.civil.tohoku.ac.jp
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Kazunori Nakano;
Kazunori Nakano
2Ecological Engineering Laboratory, Faculty of Engineering, Nihon University, Nihon 963-8642, Japan
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Marco Leon-Romero;
Marco Leon-Romero
1Ecological Engineering Laboratory, Graduate School of Engineering, Tohoku University, Tohoku 980-8579, Japan
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Yoshio Aikawa;
Yoshio Aikawa
1Ecological Engineering Laboratory, Graduate School of Engineering, Tohoku University, Tohoku 980-8579, Japan
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Shigeyuki Arai;
Shigeyuki Arai
3Environmental Technology Research Center, Mitsubishi Materials Corporation, 37-02 Uguizuwa-nangoaramachi, Kurihara, Miyagi 989-5402, Japan
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Osamu Nishimura
Osamu Nishimura
1Ecological Engineering Laboratory, Graduate School of Engineering, Tohoku University, Tohoku 980-8579, Japan
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Water Sci Technol (2015) 72 (7): 1226–1233.
Article history
Received:
April 02 2015
Accepted:
June 15 2015
Citation
Paula Cecilia Soto-Rios, Kazunori Nakano, Marco Leon-Romero, Yoshio Aikawa, Shigeyuki Arai, Osamu Nishimura; Differences in the removal mechanisms of Undaria pinnatifida and Phragmites australis as biomaterials for lead removal. Water Sci Technol 1 October 2015; 72 (7): 1226–1233. doi: https://doi.org/10.2166/wst.2015.334
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