Distribution coefficients of potentially toxic elements in soils from the eastern Amazon

The solid-solution distribution or partition coefficient (Kd) is a measure of affinity of potentially toxic elements (PTE) for soil colloids. Kd plays a key role in several models for defining PTE guideline values in soils and for assessing environmental risks, and its value depends on edaphic and c...

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Bibliographic Details
Published in:Environmental science and pollution research international 2013-10, Vol.20 (10), p.7231-7242
Main Authors: de Souza Braz, Anderson Martins, Fernandes, Antonio Rodrigues, Ferreira, José Roberto, Alleoni, Luís Reynaldo Ferracciú
Format: Article
Language:English
Subjects:
Adsorption
Affinity
Agriculture
Aquatic Pollution
Atmospheric Protection/Air Quality Control/Air Pollution
Brazil
Cadmium
Carbon
Climatic conditions
Colloids
Earth and Environmental Science
Ecotoxicology
Environment
Environmental assessment
Environmental Chemistry
Environmental Health
Environmental Monitoring
Environmental protection
Environmental risk
Hazardous Substances - analysis
Hazardous Substances - toxicity
Heavy metals
Lead
Mercury
Metals, Heavy - analysis
Metals, Heavy - toxicity
Mineralogy
Pollution
Research Article
Risk assessment
Soil - chemistry
Soil contamination
Soil Pollutants - analysis
Soil Pollutants - toxicity
Soil sciences
Soils
Stainless steel
Studies
Waste Water Technology
Water Management
Water Pollution Control
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Summary:The solid-solution distribution or partition coefficient (Kd) is a measure of affinity of potentially toxic elements (PTE) for soil colloids. Kd plays a key role in several models for defining PTE guideline values in soils and for assessing environmental risks, and its value depends on edaphic and climatic conditions of the sites where the soils occur. This study quantified Kd values for Cd, Co, Cr, Cu, Hg, Ni, Pb, and Zn from representative soil samples from Brazil’s eastern Amazon region, which measures 1.2 million km 2 . The Kd values obtained were lower than those set by both international and Brazilian environmental agencies and were correlated with the pH, Fe and Mn oxide content, and cationic exchange capacity of the soils. The following order of decreasing affinity was observed: Pb > Cu > Hg > Cr > Cd ≈ Co > Ni > Zn.
ISSN:0944-1344
1614-7499
DOI:10.1007/s11356-013-1723-9