Population expansion and technological development ge nerate an increase in the use of natural resources, especially water resources, and, as a consequence, the amount of waste and chemical residues dumped into the effluents increases. With the end of the garimpo in the town of Diamantina, the spring that cut s through the city has notoriously had its flow reduced and its slopes visibly diminished and devastated by erosion, which reminds us of the need to install recovery and preservation programs. Among the pollutants, we can highlight the heavy metals, which cause great concern because of their toxicity. The present work sought to use the membrane filtration process. For this purpose, membranes were prepared using the chitosan biopolymer. The membranes were tested for the capacity to absorb metal ions. Water samples were collected from the hydrographic subbasin Ribeirão das Pedras, located in the city of Diamantina, MG, Brazil. The membranes were efficient, and the detection of possible improvements in the formulations, as well as sample collections, should be performed during other periods of the year.
No presente trabalho, foram confeccionadas quatro diferentes formulações de membranas à base de quitosana de maneira a tipificar a eficiência da utilização do biopolímero quitosana na adsorção de metais pesados e solubilização. Após a confecção das membranas, foram realizados ensaios de solubilidade, tempo de filtração, absorção atômica e microscopia eletrônica de varredura (MEV). As membranas MQA e MQE, compostas por quitosana 1% + acetato de celulose eme solução de ácido acético 1% e por quitosana 2% e solução de ácido acético 1%,respectivamente, apesentaram bons resultados na análise de solubilidade, tempo de filtração e homogeneidade da superfície, evidenciado pelas fotos de MEV. Conclui-se, portanto, com base nas análises realizadas no presente trabalho, que, devido a capacidade de o biopolímero quitosana formar complexos com íons metálicos e ser economicamente viável, esta apresenta-se como alternativa para ser estudada no desenvolvimento de novas formulações a serem testadas em processos de filtração por membranas, sobretudo pelo evidente aumento da adsorção de alguns metais pesados.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.