AMMONIA AND PHOSPHATE REMOVAL FROM AQUACULTURE WATER VIA ADSORPTION USING MODIFIED ALGAE-BASED SORBENT

• Main Author: Jauhara, Ghina
• Format: Final Project
• Language: Indonesia
• Subjects: Teknik saniter dan perkotaan; teknik perlindungan lingkungan
• Online Access: https://digilib.itb.ac.id/gdl/view/86231
• Institution: Institut Teknologi Bandung

Phosphate and ammonia contribute to eutrophication and harmful algal blooms, threatening aquatic ecosystems. This study investigates modified algae-based sorbents for their removal from aquaculture water. Algae biomass from a Karawang district pond is prepared as adsorbents modified with 0.1M HCl, 0.1M NaOH, and FeCl3 (A-HCl, A-NaOH, A- FeCl3). FTIR analysis showed no alteration of functional groups critical for phosphate adsorption, while SEM revealed enhanced surface roughness, increasing adsorption efficiency. The sorbents' removal capacities followed the order A-FeCl? > A-HCl > A-NaOH, with A-FeCl? achieving a maximum phosphate adsorption of 0.3763 mg/g. Kinetic and isotherm models indicated that phosphate adsorption on A- FeCl3 was primarily chemisorptive, involving ?-? interactions, oxygen-containing groups, and Fe-O complexation, with optimal removal at 3 g/L for 5 hours at pH 3. A-FeCl3 shows promise as a sustainable solution for removing phosphate from eutrophic waters.