%0 Journal Article
%T Os benef¨ªcios da utiliza  o de coagulantes naturais para a obten  o de ¨¢gua pot¨¢vel = The benefits of using natural coagulants to obtain potable water
%A Milene Carvalho Bongiovani
%A Leila Cristina Konradt-Moraes
%A Rosangela Bergamasco
%A Beatriz Sayuri Sakaniva Louren£¿o
%J Acta Scientiarum : Technology
%D 2010
%I Editora da Universidade Estadual de Maring¨¢
%X Este trabalho tem como objetivo a avalia  o dos benef¨ªcios da obten  o de ¨¢gua pot¨¢vel a partir de coagulantes naturais, em fun  o da remo  o dos parametros cor, turbidez e compostos com absor  o em UV-254 nm, utilizando como agente coagulante o Tanfloc SS. Com esta finalidade, ensaios de coagula  o/flocula  o/sedimenta  o foram realizados em aparelho ¡°jar test¡±, com ¨¢gua superficial de caracter¨ªsticas de alta cor/turbidez. O pH de coagula  o (3,0 a 9,0) e a concentra  o do coagulante (10,0 a 60,0 mg L-1) foram variadoscom a finalidade da constru  o dos diagramas de coagula  o e a determina  o das regi es de melhor efici¨ºncia de remo  o de cor e turbidez. As condi  es de trabalho para o processo de coagula  o/flocula  o/sedimenta  o foram fixadas de acordo com ensaios pr¨¦vios. Com os dados obtidos, o diagrama de coagula  o foi constru¨ªdo utilizando o programa 3DField 2.7.0.0. Com base nestes diagramas, para o coagulante Tanfloc SS, concluiu-se que as melhores remo  es dos parametros estudados, em sua maioria, ocorreram para a faixa de pH entre 6,0 e 9,0 em todas as concentra  es estudadas. Desta forma, constatou-se que a utiliza  o de coagulantes organicos biodegrad¨¢veis ¨¦, portanto, uma alternativa t¨¦cnica aos coagulantes convencionais, possuindo benef¨ªcios de sa¨²de p¨²blica al¨¦m de preserva  o ambiental. This work aims to evaluate the benefits of obtaining potable water from natural coagulants, in function of the removal of the parameters color, turbidity and compounds with absorbing in UV-254 nm, using Tanfloc SS as a coagulant. To that end, coagulation/flocculation/sedimentation tests were performed in jar test with surface waterfeaturing high color/turbidity. The coagulation pH (3.0 to 9.0) and the concentration of coagulant (10.0 to 60.0 mg L-1) were varied with the purpose of constructing coagulation diagrams and determine regions of best efficiency for removal of color and turbidity. Theworking conditions for the process of coagulation/flocculation/sedimentation were set according to preliminary tests. With the data obtained, the coagulation diagram was built using the 3DField 2.7.0.0 software. Based on these diagrams, for the coagulant Tanfloc SS, it is concluded that the best removals of the parameters studied, in their majority, occurred in the range of pH between 6.0 and 9.0 in all the concentrations studied. Thus, it was noted that the use of biodegradable organic coagulant is therefore a technical alternative to conventional coagulants, with public health benefits in addition to environmental preservation.
%K coagulantes naturais
%K taninos vegetais
%K Tanfloc
%K ¨¢gua pot¨¢vel
%K natural coagulants
%K vegetable tannin extracts
%K Tanfloc
%K potable water
%U http://periodicos.uem.br/ojs/index.php/ActaSciTechnol/article/view/8238/8238