Study of the bioaccumulation kinetic of lead by living aquatic macrophyte Salvinia auriculata

被引：40

作者：

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

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

Thome, L. P. ^{[1
]}

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

Trigueros, D. E. G. ^{[1
]}

Oliveira, A. P. ^{[1
]}

Szymanski, N. ^{[1
]}

机构：

[1] Univ Estadual Oeste Parana, Dept Chem Engn, Postgrad Program NBQ, BR-85903000 Toledo, PR, Brazil

来源：

CHEMICAL ENGINEERING JOURNAL | 2009年 / 150卷 / 2-3期

关键词：

Salvinia auriculata; Lead; Phytoaccumulation; SR-TXRF technique; Non-structural kinetic model; X-RAY-FLUORESCENCE; TOTAL-REFLECTION; HEAVY-METALS; REMOVAL; WATER; BIOSORPTION; CADMIUM; IONS; BROWN;

D O I：

10.1016/j.cej.2009.01.004

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

In the present work, the lead phytoaccumulation by living free floating aquatic macrophytes Salvinia auriculata was investigated in a greenhouse. These plants were grown in lead-doped hydroponic solutions forming, as a function of time, six collections of nutrient media, roots and leaves of plants from a batch system. The synchrotron X-ray radiation fluorescence technique was used in order to determine element concentrations in the nutrient media. dry roots and aerial parts of plant. The aquatic plant-based lead removal data were described by using a non-structural kinetic model. According to the experimental data, both adsorption and bioaccumulation mechanism are present and a competition between the phosphorus macronutrient and lead for plant growth was observed, when great concentration of lead in roots is present. The non-structural kinetic models have shown good agreement with the lead uptake experimental data in all the investigated cases. The results of living macrophytes S. auriculata-based-metal bioaccumulation kinetic parameters can be used in artificial wetlands to predict the heavy metal removal dynamics from wastewaters. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：316 / 322

页数：7

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