Síntese e eficiência da quitosana catiônica no tratamento físico-químico da água
DOI:
https://doi.org/10.5902/2236117085777Palavras-chave:
Floculante orgânico, Modificação estrutural, Polissacarídeos catiônicosResumo
A água para consumo humano deve obedecer aos padrões legais de potabilidade, envolvendo tratamentos que muitas vezes utilizam agentes químicos com impactos no meio ambiente e na saúde humana. Uma alternativa é utilizar polímeros orgânicos, como a quitosana, mas em algumas situações sua estrutura deve ser modificada para melhorar sua aplicabilidade. Isto é conseguido adicionando reagentes como CHPTAC para torná-lo catiônico. Esta pesquisa teve como objetivo criar um polissacarídeo catiônico derivado da quitosana utilizando o reagente CHPTAC e aplicá-lo no tratamento de água, variando dosagens e pH. Os resultados mostraram que as quitosanas sintetizadas obtiveram boa eficiência na remoção de turbidez e cor, sendo algumas dosagens mais eficazes. Além disso, cada floculante teve melhor desempenho em uma faixa específica de pH, muitas vezes em pH ácido. A pesquisa destacou que tanto a quitosana catiônica quanto a não catiônica são eficazes no tratamento de água, proporcionando uma alternativa viável aos coagulantes inorgânicos comumente usados.
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