Adsorption of methylene blue dye by different methods of obtaining shrimp residue chitin

Abstract

The textile industry, very important for the world economy, generates an effluent containing dyes, and which, when discarded in water bodies without proper treatment, can cause impacts to human health and the environment. One of these widely used dyes is methylene blue, whose characteristics are high solubility in water and its toxic potential, and which effects range from eye irritations, nausea, vomiting and even mental confusion. Among the potential adsorbents of this dye is chitin, which is a biopolymer extracted from the shrimp exoskeleton. Aiming at the development of a low-cost adsorbent material with potential use in the textile effluent treatment industry, the ability to remove methylene blue dye by shrimp residue chitin, obtained by eleven different methodologies, was verified. The three most efficient treatments reached approximately 75% of dye removal, proving the high adsorption power of shrimp residue. In addition to providing technological development of materials, the research brings socioeconomic benefits to the fishermen’s colony with the use of shrimp residue for the adsorption of other waste from the textile industry, contributing to the sustainability of both activities and reducing the environmental impact.

Colônia de pescadores Z3: relação entre geração de resíduos pesqueiros e sustentabilidade

“…Além das possibilidades de uso, autores como Fontes et al (2017) atribuem como fator de interesse pela produção da quitina suas propriedades biotecnológicas. Considerando a área ambiental, há um uso promissor da quitina para a remoção de diferentes compostos presentes em efluentes, tais como corantes e metais (LABIDI et al, 2019;MABEL et al, 2019;OTTO et al, 2021). Contudo, apesar das suas possibilidades de uso e interesse em sua produção, a quitina é um produto que necessita de cuidados para sua produção e apresenta como fatores que limitam sua produção aspectos que relacionados a fonte de matéria-prima utilizada, no caso do camarão, a sazonalidade e a poluição (SILVA, 2007).…”

The effect of methylene blue on water hardness and antibacterial activity and the environment

“…Colored indicators are chemicals that change color depending on pH or other specific parameters in a solution (Orouji, 2022). They are widely used to determine the hardness of water, which refers to the concentration of minerals, including calcium and magnesium, in water [ (Otto, 2021).The use of colored indicators in water hardness analysis offers several advantages. First, they allow quick and visual determination of water hardness without the need for sophisticated laboratory equipment.…”

Removal of a food dye on two solid supports by adsorption

“…Since pigments have a high ability to dissolve in water, adsorption is considered one of the most common and effective methods of treating the resulting pollution, and many adsorbent materials are used for this purpose, especially activated carbon because of its properties (Otto et al, 2021), in addition to the use of clay, as it is one of the most abundant and cheapest materials (Dhar et al, 2023), and it impacted the ecological balance. Therefore, treating pollution with dyes is essential and extremely important, and there are several ways to do this, including filtration and sedimentation processes, ion exchange, adsorption, aerobic and anaerobic treatment, and other physical and chemical methods (Saravanan et al, 2021).…”