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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Cadmium sorption and extractability in tropical soils with variable charge

Full text
Author(s):
Colzato, Marina [1] ; Ferracciu Alleoni, Luis Reynaldo [1] ; Kamogawa, Marcos Yassuo [1]
Total Authors: 3
Affiliation:
[1] Univ Sao Paulo, Coll Agr Luiz de Queiroz, Av Padua Dias 11, BR-13418900 Piracicaba, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: ENVIRONMENTAL MONITORING AND ASSESSMENT; v. 190, n. 6 JUN 2018.
Web of Science Citations: 2
Abstract

The availability of cadmium (Cd) for plants and its impact in the environment depends on Cd sorption in soil colloids. The study of Cd sorption in soil and its fractionation is an interesting tool for the evaluation of Cd affinity with soil pools. The objective with this study was to evaluate Cd sorption and desorption in tropical soils with variable charge (three Oxisols), in a Mollisol and in two Entisols with diverse physical, chemical, and mineralogical attributes. We used a thermodynamic approach to evaluate Cd sorption and performed a chemical fractionation of Cd in the six soils. Data from Cd sorption fit the Langmuir model (r > 0.94), and the sorption capacity ranged from 0.33 to 11.5 mmol kg(-1). The Gibbs standard free energy was positively correlated to Cd sorption capacity (r = 0.74, except for the Quartzipsamments), and it was more favorable in soils with great sorption capacity. Distribution of Cd among fractions was not affected (t test, alpha = 0.05) by initial concentration, and there was a predominance of Cd extractable in 0.1 mol L-1 CaCl2. (AU)

FAPESP's process: 11/19944-3 - Use of construction and demolition waste as substrates for plant
Grantee:Marcos Yassuo Kamogawa
Support Opportunities: Regular Research Grants
FAPESP's process: 12/08205-8 - Strategies for in situ sampling of macronutrients and micronutrients of soil
Grantee:Marcos Yassuo Kamogawa
Support Opportunities: Regular Research Grants
FAPESP's process: 11/23498-9 - Advanced flow systems for technological, agronomical and environmental analysis
Grantee:Elias Ayres Guidetti Zagatto
Support Opportunities: Research Projects - Thematic Grants