Competitive Absorption of Cadmium, Zinc, and Lead by Velvet Bean (Stizolobium Aterrimum) and Metal Distribution among Soil Fractions

The aim of this study was to evaluate the interactions among cadmium (Cd), zinc (Zn), and lead (Pb) regarding their distributions among soil fractions and absorption by velvet bean. Solutions containing 20, 150, and 150 mg kg ⁻¹ of Cd, Zn and Pb, all together, combined 2 by 2, or alone, were added t...

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Bibliographic Details
Published in:Communications in Soil Science and Plant Analysis 2014-01, Vol.45 (11), p.1499-1510
Main Authors: Queiroz Santos, Ana Cristiane, Maria de Aguiar Accioly, Adriana, Araújo do Nascimento, Clístenes Williams, Machado dos Santos, Nielson, Chaves de Melo, Évio Eduardo, de Lima Xavier, Bruno Toríbio
Format: Article
Language:English
Subjects:
absorption
aerial parts
Agronomy. Soil science and plant productions
Biological and medical sciences
biomass
Cadmium
Competition
fractionation
Fractions
Fundamental and applied biological sciences. Psychology
heavy metals
lead
Mucuna pruriens var. utilis
organic matter
phytoextraction
phytotoxicity
soil
Soil and water pollution
Soil science
Soil sciences
Zinc
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Summary:The aim of this study was to evaluate the interactions among cadmium (Cd), zinc (Zn), and lead (Pb) regarding their distributions among soil fractions and absorption by velvet bean. Solutions containing 20, 150, and 150 mg kg ⁻¹ of Cd, Zn and Pb, all together, combined 2 by 2, or alone, were added to the soil. Plants were grown for 35 days. Biomass and metal contents in plants and soil fractions were measured. The results showed that Zn was the most phytotoxic metal. Competition among Cd, Zn, and Pb influenced their distribution into soil fractions; Pb prevailed on the organic-matter fraction, Zn on the water-soluble fraction, and Cd on the water-soluble and organic-matter fractions. Competition between Cd and Zn influenced the absorption and translocation of Zn. Soil Pb had no influence on the distribution of Pb in plant aboveground parts but increased its concentration in the root and favored Zn translocation.
ISSN:1532-2416
0010-3624
1532-2416
1532-4133
DOI:10.1080/00103624.2014.904333