TY - JOUR
T1 - Differences in the removal mechanisms of Undaria pinnatifida and Phragmites australis as biomaterials for lead removal
AU - Soto-Rios, Paula Cecilia
AU - Nakano, Kazunori
AU - Leon-Romero, Marco
AU - Aikawa, Yoshio
AU - Arai, Shigeyuki
AU - Nishimura, Osamu
N1 - Publisher Copyright:
© 2015 IWA Publishing.
Copyright:
Copyright 2016 Elsevier B.V., All rights reserved.
PY - 2015
Y1 - 2015
N2 - 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.
AB - 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.
KW - Biomaterials
KW - Heavy metals
KW - Permeable reactive barriers
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U2 - 10.2166/wst.2015.334
DO - 10.2166/wst.2015.334
M3 - Article
C2 - 26398039
AN - SCOPUS:84942447063
VL - 72
SP - 1226
EP - 1233
JO - Water Science and Technology
JF - Water Science and Technology
SN - 0273-1223
IS - 7
ER -