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Plant availability of trace elements in sewage sludge-treated soils: methodology¹ Rev. Bras. Ciênc. Solo
Marchi,Giuliano; Guilherme,Luiz Roberto Guimarães; Chang,Andrew C.
Synthetic root exudates were formulated based on the organic acid composition of root exudates derived from the rhizosphere of aseptically grown corn plants, pH of the rhizosphere, and the background chemical matrices of the soil solutions. The synthetic root exudates, which mimic the chemical conditions of the rhizosphere environment where soil-borne metals are dissolved and absorbed by plants, were used to extract metals from sewage-sludge treated soils 16 successive times. The concentrations of Zn, Cd, Ni, Cr, and Cu of the sludge-treated soil were 71.74, 0.21, 15.90, 58.12, and 37.44 mg kg-1, respectively. The composition of synthetic root exudates consisted of acetic, butyric, glutaric, lactic, maleic, propionic, pyruvic, succinic, tartaric, and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Heavy metals; Soil extractant; Organic acids; Rhizosphere; Root exudates.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832011000400039
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