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- W2065046516 abstract "Comumente, o cádmio é encontrado em resíduos industriais e urbanos, lodo de esgoto e fertilizantes que, quando dispostos no solo, podem representar riscos de poluição do solo e água. Propôs-se, neste trabalho, analisar a adsorção e o deslocamento do íon cádmio nos Latossolo Vermelho Acriférrico, Argissolo Vermelho Eutrófico, Nitossolo Vermelho Eutroférrico e Neossolo Quartzarênico, encontrados em áreas de cultivo do Estado de Goiás. Para a determinação da quantidade de cádmio adsorvido, 50 mL de solução de CaCl2.2H2O (0,01 mol L-1) com diferentes concentrações de Cd (0,10; 1,80; 19,00; 46,60 e 105,70 mg L-1) foram adicionados a 5,0 mL de terra fina secada em estufa e agitados 24 h; cuja sorção foi avaliada pelos modelos potencias e lineares da isoterma Freundlich. No ensaio do transporte utilizou-se uma deslocadora de Cd, em colunas de solo, na concentração de 105,70 mg L-1, em que os fatores de retardamento (R) e coeficientes de dispersão hidrodinâmica (D), foram ajustados pela minimização da soma dos quadrados dos desvios entre as curvas de eluição experimental e simulada. Tanto as isotermas lineares e potenciais como os parâmetros de transporte R e D apresentaram bom ajuste para descrever a adsorção e o deslocamento do Cd nas diferentes classes de solo estudadas. O Neossolo apresentou retenção menor do Cd em comparação com as demais classes de solo sendo, portanto, mais vulnerável à contaminação das águas subterrâneas, seguido do Latossolo, Argissolo e Nitossolo." @default.
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- W2065046516 date "2010-01-01" @default.
- W2065046516 modified "2023-09-25" @default.
- W2065046516 title "Adsorção e deslocamento do íon cádmio em solos do cerrado" @default.
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- W2065046516 doi "https://doi.org/10.1590/s1415-43662010000800009" @default.
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