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Adopting cotton as the bio-templates, calcium titanate with special morphology (CTCTO) was produced by solgel template method and characterized by XRD, SEM, BET and FTIR. The adsorption and photocatalytic performance had been studied. At the same time, the ability of CTCTO for removing heavy metals in complexing and the chemical oxygen demand (COD Cr ) in water was investigated. The results show that the calcium titanate prepared with this method existed in the shape of broken microtubules. CTCTO had strong adsorption and photocatalysis capacity. In the medium of pH 5-7, when the catalyst loading is 1 g/L, for the initial concentrations of lead 250 mg/L, of cadmium35 mg/L, of nickel 70 mg/L and of methylene blue 10 mg/L, lead, cadmium and nickel are all adsorbed completely within 20 min, and the degradation rate of methylene blue reaches 84.13% within 120 min. For the heavy metals in complexing state, the removal rates of cadmium, lead and nickel reached 100%, and the value of COD Cr  also decreased by 56% after one hour of catalyzed sorption. A new method for the simultaneous removal on heavy metals and organics is developed, and it has been used in the treatment of water samples and some satisfying results are obtained.

journal of advanced oxidation technologies

Preparation of Calcium Titanate Based on the Cotton Template Method and its Simultaneous Removal Performance to Heavy Metals and Organic Pollutants in Water