Study on the performance and mechanism of Cu(II) adsorption by porous ceramics prepared from tailings
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In this study, industrial waste tailings were used as the main raw material to prepare porous ceramic by injection molding. The porous ceramic samples were surface treated by γ-Aminopropyl triethoxysilane solution to be used as adsorbent to removeCu(II) from solution. The effects of sintering technology on properties of porous ceramic samples were studied. Meanwhile,the effects of test conditions on the adsorption characteristics of samples were also studied. The samples were analyzed by Xray diffraction, FTIR, and SEM. Atomic absorption spectrophotometer was used to determine the changes of Cu(II)concentration in the aqueous solution before and after adsorption. The results show that the compressive strength of thesamples is increased with the increase of sintered temperature and extension of holding time. The average pore diameters ofthe samples are decreased and concentrated between 0.1 and 0.2mm with the increase of sintered temperature. The removalrates and the adsorption capacities of the samples to Cu(Ⅱ) are increased with the increase of solution temperature, increaseof pH value of the solution and the extension of the test time.
Abstract
In this study, industrial waste tailings were used as the main raw material to prepare porous ceramic by injection molding. The porous ceramic samples were surface treated by γ-Aminopropyl triethoxysilane solution to be used as adsorbent to removeCu(II) from solution. The effects of sintering technology on properties of porous ceramic samples were studied. Meanwhile,the effects of test conditions on the adsorption characteristics of samples were also studied. The samples were analyzed by Xray diffraction, FTIR, and SEM. Atomic absorption spectrophotometer was used to determine the changes of Cu(II)concentration in the aqueous solution before and after adsorption. The results show that the compressive strength of thesamples is increased with the increase of sintered temperature and extension of holding time. The average pore diameters ofthe samples are decreased and concentrated between 0.1 and 0.2mm with the increase of sintered temperature. The removalrates and the adsorption capacities of the samples to Cu(Ⅱ) are increased with the increase of solution temperature, increaseof pH value of the solution and the extension of the test time.
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