| Antimony is a potentially toxic and carcinogenic heavy metal, which is very important for human health and the environment. With the international market demand, resulting in heavy metal mines overexploitation, produce large amounts of antimony mine waste water, causing serious pollution of antimony. At present, the research on the treatment of antimony is relatively few. By specific surface area measurements(BET), X-ray diffraction analysis(XRD) technology and infrared spectrum analysis techniques(FTIR), scanning electron microscopy analysis(SEM) to the materials were characterized. To investigate the adsorption of Fe-Cu binary oxide antimony removal mechanism. Then, the performance of Fe-Cu binary oxide was comprehensively studied, and the influence factors of the adsorption isotherm, kinetics and the efficiency of removing antimony were studied. Finally, the adsorption materials were studied in addition to the mechanism of antimony, as well as the adsorption of iron and copper in the solution after the release of iron, to prevent the secondary pollution.The main results and conclusions are summarized as follows:Optimum conditions of Fe-Cu binary oxide of the antimony removal: static experiments using investment to increase the amount of 0.03 g, experimental temperature within the range of 5-40 ?, removal rate of slowly varying with temperature increasing, used in the experiment at room temperature(25?), oscillation time was 24 h, p H by 5, simulation antimony solution initial concentration of 40 mg / L, adsorption capacity of antimony(III) and antimony(V) respectively, up to 111.27mg/g and 104.95mg/g.The use of BET, XRD, FTIR, SEM and other techniques to characterize the Fe-Cu binary oxide shows that the composite is mainly composed of Fe, Cu composition. Iron is mainly in the form of artificial synthesis of the second line of iron ore, copper exists in the form of amorphous copper oxide. Scanning electron microscopy(SEM) adsorption materials in adsorption of no fixed shape, composed of size of massive particles. Porous structure exists in the surface, the arrangement of loose, less aggregation phenomenon, the antimony in the water can have a good adsorption.The Freund1 ich and Langmuir isotherms were used to describe the adsorption isotherms of the complexes. The maximum adsorption capacity of Sb(III) and Sb(V) was 169.196mg/g and 149.937mg/g, respectively. When the p H is within 2-10 stage, Sb(III) adsorption capacity is not much change, when the p H value exceeds 10, the adsorption capacity decreased significantly. In the low p H range(3-5), in addition to Fe-Cu binary oxide Sb(V) the maximum amount of adsorption, adsorption increases with p H will fall. The adsorption effect of SO42-, PO43-, HCO3- and Sb(III) on CO32- was not obvious in solution.With SO42-, PO43- concentration increased, Sb(V) adsorption capacity decreased; CO32-, HCO3- almost no effect on the Sb(V) adsorption capacity. The innovation of this issue lies in the use of new materials, varied by changing the molar ratio of iron and copper were prepared and efficient performance of the new addition to antimony, Fe-Cu binary oxide. In addition, this paper explores the more comprehensive performance in addition to antimony, Fe-Cu binary oxide, will be a number of adsorbent material characterization and analysis of the recent addition of antimony mechanism for the modified adsorbent material future business practices and to provide a realistic basis. The Fe-Cu binary oxide has the advantages of portability and low cost synthesis process, there will likely be a future adsorbent that can remove antimony easily effectively. |
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