Banca de DEFESA: VANESSA RAFAELA CRUZ MOURA BARBALHO

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : VANESSA RAFAELA CRUZ MOURA BARBALHO
DATA : 02/03/2017
HORA: 09:00
LOCAL: AUDITÓRIO DO NUPEG
TÍTULO:

"Removal of Cd2+ from synthetic effluent using polymers based on acrylamide"

PALAVRAS-CHAVES:

Effluent treatment, heavy metals, polymers.

PÁGINAS: 70
GRANDE ÁREA: Engenharias
ÁREA: Engenharia Química
RESUMO:

The serious environmental problems generated by the considerable increase in the discards of industrial effluents contaminated with heavy metals in the rivers and seas, together with the increasingly rigorous environmental laws, stimulated the researches in this area, in order to obtain alternative methods of low cost and more efficient in the Water treatment and disposal. The activity of a toxic substance always depends on its concentration in the organism, regardless of the mechanism of intoxication. In this context, the present work has the objective of evaluating the efficiency in the use of anionic polymers based on acrylamide to remove the Cd²⁺ and Zn²⁺ metals from a synthetic effluent using a desolubilization method followed by flocculation / filtration. AN 905 VHM, AN 934 SH and AN 977 SH polymers were used, which present different anionicities. The parameters temperature, pH and concentration of the metals solution were evaluated. The 100 ppm metal solution was added to the polymer solution at 1000 ppm, keeping the volume of the metal cation solution constant and the volume of the polymer solution varying, in order to obtain different concentrations in each sample. After the 5 minute period under stirring, flocculation occurred and then filtration of the effluent. The filtrate was analyzed in the atomic absorption spectrophotometer, allowing to evaluate the efficiency of the removal process of the cadmium and zinc ions. The action of pH variation on the medium directly affects the adsorption process, while the temperature has less significant results. The polymers used proved to be efficient in the removal of metals, but due to the different ionic loads, lead to varying percentages of removal, resulting from the interaction between the metal ions and the polymer chain. Analyzing the percentage of removal of the cadmium and zinc ions when the temperature varies, the polymer AN 905 SH was the one that obtained better results, however when the variation of the values of pH for the conditions of these tests was obtained the greater beneficiary was The polymer AN 977 SH due to having higher ionic charge being responsible for the higher percentage of extraction of the metals. The results obtained in this work showed that it is possible to apply these polymers in the treatment of effluents containing heavy metals.

MEMBROS DA BANCA:
Presidente - 1308273 - EDUARDO LINS DE BARROS NETO
Interno - 347567 - MARCIA MARIA LIMA DUARTE
Externo à Instituição - MARTA LIGIA PEREIRA DA SILVA - UFERSA