Study of the efficiency of the use of bamboo as a bioadsorbent in the removal of methylene blue

ABSTRACT

The methylene blue dye, widely used in the textile industry, is capable of causing serious damage if dumped into water bodies without proper treatment. The objective of this work was to study the efficiency of using bamboo, in natura and charcoal, as bioadsorbents in the removal of methylene blue dye. For this, fresh bamboo and thermally activated bamboo were produced and characterized by specific surface area, thermogravimetric, scanning electron microscopy and infrared spectroscopy. Batch adsorption tests were carried out with the bioadsorbents produced, using an experimental design, of the 2³ factorial type and repetition of the central point. The conditions of the adsorption process for bamboo in natura were obtained, with 16 g/L of adsorbent concentration, 50 mg/L of dye concentration and pH =10, achieving a removal efficiency of 98.1%. The same conditions were used with charcoal bamboo, obtaining a dye removal efficiency of 92.2%. The difference in dye removal percentage is due to the characteristics of each bioadsorbent. The results demonstrate that the use of bamboo as a bioadsorbent can be an efficient and sustainable alternative for the treatment of effluent with dyes through the adsorption process.

Keywords
Methylene Blue; Bamboo; Bioadsorbent