Coagulação/floculação de suspensões ricas em óxidos de ferro por sulfato de alumínio.
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Date
2004
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Abstract
The destabilization mechanism of suspensions of positively charged iron oxide particles by aluminum sulphate was investigated, aiming to evaluate the efficiency of the latter as a coagulant for natural surface waters from iron ore mining plants. Synthetic water s that simulate natural suspensions were used. The best coagulant dosage was found to be 100 mg/L at pH 4. The specific adsorption of hydrolysis products of aluminum salts on iron oxide particles and heterocoagulation processes involving differently charged substrates are proposed to explain the turbidity reduction of the suspensions.
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Keywords
Iron oxide particles, Destabilization of suspensions, Aluminium sulphate
Citation
Guedes, C. D. et al. Coagulação/floculação de suspensões ricas em óxidos de ferro por sulfato de alumínio. Química Nova, v. 27, n.5. p. 715-719, 2004. Disponível em: <http://www.scielo.br/pdf/qn/v27n5/a07v27n5.pdf>. Acesso em: 17 set. 2012.