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

抄録

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 successfully by an anion exchange with DS^–. The toluene in aqueous solution (initial concentration; 10 and 50 mg/dm³) 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.