PIXE analysis of chromium phytoaccumulation by the aquatic macrophytes Eicchornia crassipes

被引：15

作者：

Espinoza-Quinones, F. R. ^{[1
]}

Rizzutto, M. A. ^{[2
]}

Added, N. ^{[2
]}

Tabacniks, M. H. ^{[2
]}

Modenes, A. N. ^{[1
]}

Palacio, S. M. ^{[1
]}

Silva, E. A. ^{[1
]}

Rossi, F. L. ^{[1
]}

Martin, N. ^{[1
]}

Szymanski, N. ^{[1
]}

机构：

[1] NBQ W Parana State Univ, Postgrad Program, Dept Chem Engn, BR-85903000 Toledo, Parana, Brazil

[2] Univ Sao Paulo, Inst Phys, BR-05508900 Sao Paulo, Brazil

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS | 2009年 / 267卷 / 07期

关键词：

PIXE technique; Chromium; Uptake; Aquatic macrophytes; Hydroponic medium; Kinetic model; WASTE-WATER TREATMENT; HEAVY-METALS; BIOSORPTION; REMOVAL; PLANTS; SCALE; IONS; BIOACCUMULATION; CADMIUM; SAMPLES;

D O I：

10.1016/j.nimb.2009.02.050

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

The uptake of hexavalent chromium in free living floating aquatic macrophytes Eicchornia crassipes cultivated in non-toxic chromium-doped hydroponic solutions is presented. A Cr-uptake bioaccumulation experiment was carried out using healthy macrophytes grown in a temperature controlled greenhouse. Six samples of nutrient media and plants were collected during the 23 day experiment. Roots and leaves were acid digested with the addition of an internal Gallium standard, for thin film sample preparation and quantitative Cr analysis by PIXE method. The Cr6+ mass uptake by the macrophytes reached up to 70% of the initial concentration, comparable to former results and literature data. The Cr-uptake data were described using a non-structural first order kinetic model. Due to low cost and high removal efficiency, living aquatic macrophytes E. crassipes are a viable biosorbent in an artificial wetland of a water effluent treatment plant. (c) 2009 Elsevier B.V. All rights reserved.

引用

页码：1153 / 1157

页数：5

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