Biosorption of Cr (VI) by Typha angustifolia: Mechanism and responses to heavy metal stress

被引：39
|
作者：
Chen, Ya-Li [1 ]
Hong, Xiao-Qing [2 ]
He, Hui [1 ]
Luo, Hong-Wei [1 ]
Qian, Ting-Ting [1 ]
Li, Ru-Zhong [2 ]
Jiang, Hong [1 ]
Yu, Han-Qing [1 ,2 ]
机构：
[1] Univ Sci & Technol China, Dept Chem, Hefei 230026, Peoples R China
[2] Hefei Univ Technol, Sch Resources & Environm Engn, Hefei 230009, Peoples R China
来源：
BIORESOURCE TECHNOLOGY | 2014年 / 160卷
关键词：
Heavy metal; Biosorption; Mechanism; mu-XRF mapping; Typha angustifolia; ACCUMULATION; TOXICITY; PLANTS;
D O I：
10.1016/j.biortech.2014.01.022
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
In this study, Typha angustifolia was proven to have an excellent accumulation ability in high concentrations of wastewater solutions having Cr (VI) concentrations up to 30 mg L (1) for 20 days (74% of removal efficiency). Synchrotron microfocus micro X-ray fluorescence (mu-XRF) mapping showed that the uptaken Cr was mainly enriched in the outer layer of the roots and a small portion of it was uniformly distributed in the fronds. The total proteins, soluble sugars, and malondialdehyde in T. angustifolia increased when the concentration of Cr (VI) increased from 9 to 30 mg L (1). Transmission electron microscope (TEM) assay showed that no lignifications were observed when Cr was absorbed by T. angustifolia. It was concluded that T. angustifolia can uptake Cr by means of surface layer absorption and transportation, and alleviate stresses associated with the sorption of Cr (VI) by thickening of cell walls or secretion of chemical substances. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码：89 / 92
页数：4
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