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
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
收藏
页码:316 / 322
页数:7
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