Estudo cinético e remoção de contaminantes no tratamento de lixiviados usando zonas húmidas subsuperfície no nível piloto
Publicado 2018-05-06
Palavras-chave
- cinética,
- wetland,
- chorume,
- metais,
- remoção
Como Citar
Copyright (c) 2018 Revista ion
Este trabalho está licenciado sob uma licença Creative Commons Attribution 4.0 International License.
Resumo
Avaliação do tratamento de lixiviado de aterro estabilizado Curva de Rodas de Medellín, na Colômbia foi realizado utilizando wetlands de fluxo de subsuperfície horizontais (HSSF) a nível piloto plantada com Phragmites australis. Os testes foram realizados em duas etapas, a primeira etapa com as cargas hidráulicas (q) de 0,015 e 0,030md-1 e na segunda etapa com 0,060 e 0,091md-1. A zona húmida sem plantas foi usado como um controle. Remoção da ordem de 71,9, 91,2 e 75,1% para CQO, a CBO5 e NH4 +, respectivamente, foram obtidos. As constantes cinéticas de COD, CBO5 and NH4 +-N foram determinados com intervalos entre 0,103 e 0,413d-1, 0,065 e 1,208d-1, e 0,113 e 0,418d-1); de acordo com um modelo de primeira ordem, sob fluxo de pistão. E, por regressão linear, tínhamos magnitudes de 0,246d-1 para a COD (R2 = 0,955), 0,299d-1 para NH4 +-N (R2 = 0,922) e 0,199d-1 para CBO5 (R2 = 0,140). Hg 37.8-92,9%, 29,9-44,9% Pb, As 7,9-77,6% e 22,9-64,3% Zn, dependendo da carga hidráulica aplicada: a remoção de mercúrio, chumbo, arsênico e zinco atingir os seguintes intervalos de folga também foram avaliadas. O acúmulo desses metais nas folhas, caules e raízes (rizomas) de Phragmites australis estava nos intervalos: 0,575-3,201mgHgKg-1, 0,649-4,718mgPbKg-1, 3,548-39,376mgZnKg-1, em 19,4mgAsKg-1.
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Referências
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