This study used common salts (monovalent and divalent salts) and seawater to cause aggregation of an acid dye, AB25 to a particle size large enough to be removed by simple filtration using a filter paper. All the common salts (CaCl2, Mg(NO3)2, KNO3, KCl, NaCl) were able to produce high removal efficiencies of AB25 (100 mg/L, unadjusted pH) at 99.4%, 90.3%, 98.4%, 99.3% and 99.3%, respectively, while a 2.5x dilution of seawater was successful in removing up to 93.8% of AB25. These findings proved the effectiveness of this method which is a much simpler and direct approach to dye wastewater remediation.
