Title of Paper:Study of hexavalent chromium induced physiological alterations in Eichhornia crassipes by LP-TXRF

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Affiliation of Author(s):材料科学与技术学院

Journal:MICROCHEMICAL JOURNAL

Key Words:Total reflection X-ray fluorescence Chromium (VI) Eichhornia crassipes Slurry sampling Bioconcentration

Abstract:In this work, an experiment was designed to evaluate the changes of nutrient elements (S, Cl, K, Ca, Mn, Fe, Zn) in the root, stem, and leaf with time, when the Eichhornia crassipes under the Cr (VI) stress, by tracking measurement using the low power total reflection X-ray fluorescence (LP-TXRF) analysis. These plants were divided into 5 groups and cultivated at the conditions of the concentration of Cr (VI) with 0, 10, 25, 50 and 100 mg/L, respectively. Each group of the experimental plant was cultured for 15 days, and sample collection was performed every two days. The root, stem, and leaf from the individual plant were individually cut, dried, milled and slurry prepared by addition of an aqueous solution of 1% v/v Triton X-100 and added in the Gallium as an internal standard. Then, a 10 mu L of the slurry droplet was analyzed by the LP-TXRF. The results demonstrate that with the increase of Cr enrichment, the contents of S, Cl, K, Ca, Fe and Zn in the root gradually decreased, whereas the S, K, Ca, Mn and Zn content showed a significant increase in stems and leaves. In addition, the enrichment of Cr by Eichhomia crassipes had a strong negative correlation with the concentration of Cr (VI) in the culture solution and the relationship between the bioconcentration factors (BCF) and the culture concentration of Cr (VI) could be fitted by a power function.

ISSN No.:0026-265X

Translation or Not:no

Date of Publication:2019-06-01

Co-author:Shao, Jinfa,Zhang, Xinlei,Rao, Sheng,Liu, Yong,LiuYong,Tang, Xinru,Xiong, Genchao,Zhang, Yan,Shan, Qing

Correspondence Author:Shan, Qing,Jia WB