Coagulação/floculação de suspensões ricas em óxidos de ferro por sulfato de alumínio
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 waters 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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Sociedade Brasileira de Química
2004
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| Online Access: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422004000500007 |
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oai:scielo:S0100-404220040005000072004-09-17Coagulação/floculação de suspensões ricas em óxidos de ferro por sulfato de alumínioGuedes,Claudia DumansPereira,Jomara G.Lena,Jorge C. dePaiva,José Fernando deLima,Rosa Malena F. iron oxide particles destabilization of suspensions aluminum sulphate 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 waters 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.info:eu-repo/semantics/openAccessSociedade Brasileira de QuímicaQuímica Nova v.27 n.5 20042004-10-01info:eu-repo/semantics/articletext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422004000500007pt10.1590/S0100-40422004000500007 |
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revista |
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| language |
Portuguese |
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Digital |
| author |
Guedes,Claudia Dumans Pereira,Jomara G. Lena,Jorge C. de Paiva,José Fernando de Lima,Rosa Malena F. |
| spellingShingle |
Guedes,Claudia Dumans Pereira,Jomara G. Lena,Jorge C. de Paiva,José Fernando de Lima,Rosa Malena F. Coagulação/floculação de suspensões ricas em óxidos de ferro por sulfato de alumínio |
| author_facet |
Guedes,Claudia Dumans Pereira,Jomara G. Lena,Jorge C. de Paiva,José Fernando de Lima,Rosa Malena F. |
| author_sort |
Guedes,Claudia Dumans |
| title |
Coagulação/floculação de suspensões ricas em óxidos de ferro por sulfato de alumínio |
| title_short |
Coagulação/floculação de suspensões ricas em óxidos de ferro por sulfato de alumínio |
| title_full |
Coagulação/floculação de suspensões ricas em óxidos de ferro por sulfato de alumínio |
| title_fullStr |
Coagulação/floculação de suspensões ricas em óxidos de ferro por sulfato de alumínio |
| title_full_unstemmed |
Coagulação/floculação de suspensões ricas em óxidos de ferro por sulfato de alumínio |
| title_sort |
coagulação/floculação de suspensões ricas em óxidos de ferro por sulfato de alumínio |
| description |
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 waters 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. |
| publisher |
Sociedade Brasileira de Química |
| publishDate |
2004 |
| url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422004000500007 |
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| _version_ |
1756387125014560768 |