The Utilization of Brown Algae as an Activated Adsorbent for The Adsorption of Methylene Blue Dye
Perwitasari, Yuli Ristianingsih, Indriana Lestari, Titi Tiara Anastasia

Universitas Pembangunan Nasional ^Veteran^ Yogyakarta

Abstract

Brown algae contain polysaccharides with carboxyl groups from alginate, which have adsorption capabilities for dyes and heavy metals. This research will focus on the utilization of brown algae as an activated adsorbent used for the absorption of methylene blue (MB) dye waste. The activated carbon made from brown algae was analyzed for moisture content, ash content, volatile matter, iodine adsorption, and fixed carbon. It was used to adsorb MB dye at a concentration of 50 ppm with varying weights of activated carbon (0.1, 0.2, 0.5, and 1 gram) and adsorption time (20, 40, 60, 80, 100, and 120 minutes). The best adsorbent mass was used to determine the adsorption rate at varying MB concentrations (10, 20, 30, and 40 ppm). The best adsorbent mass was found to be 1 gram at a concentration of 50 ppm, and the best adsorbent-to-concentration ratio was 10 ppm.

Keywords: Brown algae, Metilen Blue, Adsorbent, Alginate, Dyes

Topic: Engineering