Application of Aluminum Dross-Derived Layered Double Hydroxides to Removal of Organic Compounds in Aqueous Solution

Abstract

like surfactant, chelating agent and so on 16,17 . For exam-ple, various anionic surfactants such as dodecyl sulfate ions, dodecylbenzene sulfonate ions and octane sulfonate ions are easily captured in the LDH structure by an anion exchange reaction. Abstract Layered double hydroxides (LDHs) with hydrophobic surface by surfactant modification were prepared using aluminum dross as a raw material, to develop a new recycling method of aluminum dross. The physical properties including crystal structure, surface texture and contact angle were investigated for the LDHs modified with dodecyl sulfate ions (DS – ) as a surfactant. The removal tests of dilute toluene in aqueous solution were demonstrated using the DS – type LDHs (DS – LDHs). Organic modification of the LDHs synthesized from aluminum dross can be achieved success-fully by an anion exchange with DS – . The toluene in aqueous solution (initial concentration; 10 and 50 mg/dm 3 ) is removed using the DS – LDHs. It was clarified that the DS – LDHs synthesized from aluminum dross can be used as an excellent adsorbent for dilute organic compounds in aqueous solution.