Adsorção de cádmio e chumbo em solos tropicais altamente intemperizados
作者： Lucília Alves Linhares , Fernando Barbosa Egreja Filho , Cristiane Valéria de Oliveira , Vito Modesto de Bellis
DOI: 10.1590/S0100-204X2009000300011
关键词:
摘要: The aims of this work were to characterize the adsorption cadmium and lead evaluate influence soil properties on parameters these elements in highly weathered tropical soils. experiment was performed four Oxisols one Ultisol. Soil samples (1 g) mixed by shaking for 16 hours with 0.01 mol L-1 CaCl2 solutions, which following doses added: 0, 10, 20, 30, 40, 60, 80 µg mL-1 cadmium, 80, 100, 120 form nitrates. supernatant analyzed determine adsorbed amounts, data fitted isotherms Langmuir Freundlich. experimental results well studied model. Maximum capacity values between 136 1,604 g-1 988 1,660 lead, while binding energies 0.0036 0.0403 0.0282 1.0425 lead. correlated pH cation exchange capacity, ones levels iron aluminum oxides.
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