Multivariate analysis of elements in chinese brake fern as determined using neutron activation analysis |
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Authors: | Chao-Yang Wei Zhi-Yong Zhang |
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Institution: | (1) Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, 100101 Beijing, China;(2) Institute of High Energy Physics, Chinese Academy of Sciences, 100101 Beijing, China |
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Abstract: | Pytoremediaton of arsenic (As) contamination using Chinese brake fern (Pteris vittata L.), an As hyperaccumulator has proven potential because of its cost-effectiveness and environmental harmonies. Aiming to
investigate the elemental correlation in Chinese brake fern, 20 elements (As, Br, Ca, Ce, Co, Cr, Eu, Fe, Hf, La, Na, Nd,
K, Rb, Se, Sm, Sr, Th, Yb and Zn) were measured in the fronds and roots of the fern by neutron activation analysis. The ferns
were sampled from two sites with high geogenic As levels: Zimudang (ZMD) and Lanmuchang (LMC) in Guizhou Province, China.
Multivariate statistic analysis was performed to explore the interrelationship between these elements, especially between
As and other elements. As was found to be positively related to K, Na, La, and Sm in both the roots and the fronds, suggesting
that these four elements might operate as synergies to As during uptake and transportation processes. Se was positively related
to most of the other cations measured, except in the fronds of the fern at ZMD, where Br replaced Se as positively related
to the other cations. The difference of As and Se in correlation with other cationic elements suggested that the two anionic
elements play different roles in elemental uptake processes. Our findings of elemental correlation highlight the importance
of the anioncation balance in Chinese brake fern. |
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Keywords: | Arsenic anion-cation balance antagonism selenium synergy cluster analysis principle component analysis |
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