Preparation and Characterization of Nanometer Calcium Titanate Immobilized on Aluminum Oxide and its Adsorption Capacity for Heavy Metal Ions in Water
Nanometer calcium titanate immobilized on Aluminum oxide (ACTO) was successfully prepared by the citrate acid sol-gel method and characterized using X-ray diffraction (XRD) and scanning electron microscopy (SEM). The adsorption capability of ACTO for Pb2+, Cd2+and Zn2+ from water was studied. Adsorption and elution were investigated under different conditions. The results show that nanometer calcium titanate could be immobilized on the aluminum oxide firmly, becoming a composite adsorbent. The Pb2+, Cd2+and Zn2+ were retained at pH 5-9, their adsorption capacities of ACTO were 124 mg•g-1, 8.58 mg•g-1 and 13.86 mg•g-1, respectively. The adsorption agent can be regenerated by elution with 2 mol•L-1 HNO3. The adsorbent has a promising prospect in removal or enriching and separation of heavy metals in water.
Zhengyi Jiang, Jingtao Han and Xianghua Liu
D. Zhang, "Preparation and Characterization of Nanometer Calcium Titanate Immobilized on Aluminum Oxide and its Adsorption Capacity for Heavy Metal Ions in Water", Advanced Materials Research, Vols. 152-153, pp. 670-673, 2011