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Previous issue date: 2012-08-28 / Environmental Laws and Regulations to dump wastewater are increasingly relevant and,
together with pressure from environmentalists, provide awareness of academics in search of
solutions. In Brazil, federal law, through Resolution No. 357 of 17/03/05 of the National
Environmental Council - CONAMA, in Article 24 deals with the disposal of these effluents.
Water pollution with heavy metals is concern because of the difficulty of the treatment and
removal from the environment. Copper, for example, is a metallic element and in the form of
salt is very soluble in water which dificults its removal. In this context, this study aims to
evaluate the extraction of copper with acrylamide polymers through the process of assisted
flocculation followed by filtration. Therefore, we used acrylamide polymers, produced by
SNF Floerger, with varying degrees of ionicity which is the parameter examined on the
extraction of copper. We used the FA polymers FA 920 SH, AH 912 SH, AN 905 SH, AN
910 SH, AN 923 SH, AN 945 SH, AN 956 SH and AN 977 SH, which have anionicities
different from each other and growing in that order. The parameters temperature, pH,
concentration of the copper solution and stirring speed are fixed. The polymer solution was
added to a solution of 200 ppm copper, varying the concentration of polymer. After stirring,
an assisted flocculation occurred followed by filtration of the effluent. The filtrate was
analyzed by atomic absorption spectrophotometer and the percentage removal of copper
ranged from 63 % to 97 %, noting that polymers with higher ionic charge were responsible for
the highest percentage of copper extraction. The results of this study showed that these
polymers can be applied in the treatment of wastewaters containing metals such as copper / As Leis e Normas ambientais de despejo de efluentes est?o cada vez mais
aplic?veis e, juntamente com a press?o dos ambientalistas, proporcionam a consci?ncia de
acad?micos em busca de solu??es. No Brasil, a legisla??o federal, atrav?s da Resolu??o n?
357, de 17/03/05 do Conselho Nacional do Meio Ambiente CONAMA, no Artigo 24, trata
do descarte destes efluentes. A contamina??o da ?gua com metais pesados ? uma preocupa??o
em virtude da dificuldade de tratamento e remo??o do ambiente. O cobre, por exemplo, ? um
elemento met?lico e sob a forma de sal ? bastante sol?vel em ?gua o que termina por dificultar
sua remo??o. Nesse contexto, o presente trabalho tem como objetivo avaliar a extra??o do
cobre com pol?meros a base de acrilamida atrav?s do processo de flocula??o seguido de
filtra??o. Para tanto foram utilizados pol?meros a base de acrilamida, fornecidos pela SNF
Floerger, com v?rios graus de ionicidade, que ? o par?metro analisado sobre a extra??o do
cobre. Foram utilizados os pol?meros FA 920 SH, AH 912 SH, AN 905 SH, AN 910 SH, AN
923 SH, AN 945 SH, AN 956 SH e AN 977 SH, que apresentam anionicidades diferentes
entre si e crescente nessa ordem. Os par?metros temperatura, pH, concentra??o da solu??o de
cobre e velocidade de agita??o foram fixados. A solu??o do pol?mero foi adicionada ? solu??o
do cobre a 200 ppm, variando a concentra??o de pol?mero. Ap?s a agita??o, ocorreu uma
flocula??o assistida e em seguida filtra??o do efluente. O filtrado foi analisado no
espectrofot?metro de absor??o at?mica e o percentual de remo??o de cobre variou entre 63%
a 97%, observando-se que os pol?meros com maior carga i?nica foram os respons?veis pelo
maior percentual de extra??o de cobre. Os resultados obtidos neste trabalho mostraram que ?
poss?vel aplicar esses pol?meros no tratamento de efluentes contendo metais como o cobre ou
similares
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/15833 |
| Date | 28 August 2012 |
| Creators | Nunes, Aquiles Filgueira |
| Contributors | CPF:59545844434, http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4798645D3, Paulo, Jo?o Bosco de Ara?jo, CPF:16838572400, http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4787949Y0#Bancas, Silva, Marta L?gia Pereira da, CPF:03494566402, http://lattes.cnpq.br/3899623847910065, Duarte, M?rcia Maria Lima, Barros Neto, Eduardo Lins de |
| Publisher | Universidade Federal do Rio Grande do Norte, Programa de P?s-Gradua??o em Engenharia Qu?mica, UFRN, BR, Pesquisa e Desenvolvimento de Tecnologias Regionais |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Format | application/pdf |
| Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/openAccess |
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