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研究报告

摘要：含锑化合物常作为纺织工业的催化剂，易引发锑（Sb）污染问题.本文以针铁矿、四方纤铁矿与水铁矿等3种常见的铁氧化物作为吸附剂，比较了不同铁氧化物对Sb（V）的去除性能，探究了印染废水中各类因素对锑吸附性能的影响.研究结果显示，3种铁氧化物均可使锑浓度为200 μg·L^-1的模拟印染废水的出水Sb（V）浓度小于50 μg·L^-1，满足相应排放标准.铁氧化物的锑吸附过程更符合准二级动力学方程与Freundlich吸附模型，表明其可能以多层吸附与化学吸附为主.铁氧化物的吸附性能主要受到废水pH值、材料比表面积、共存离子等因素的影响.BET、SEM与TEM结果显示，水铁矿具有更大比表面积与更小粒径，在3种铁氧化物中具有最佳的Sb（V）吸附容量，在酸性条件下具有更好的吸附性能；共存的含氧阴离子对锑的吸附影响比较大，尤其是磷酸根，但在实际印染废水的水质特征下，3种铁氧化物对Sb（V）均具有较高的去除效果.

Abstract：Antimony compounds are often used as catalysts in textile industry， which may cause antimony pollution. In this paper， the Sb（V） adsorption performances by goethite， akaganeite and 2-line ferrihydrite were compared. And the influences of various factors from textile wastewater on adsorption process were investigated. results showed that the Sb（V） concentration of simulated textile wastewater with initial Sb（V） concentration of 200 μg·L^-1 was less than 50 μg·L^-1 after adsorption， meeting the corresponding discharge standard. The antimony adsorption process was fitted well by the pseudo-second-order kinetic equation and the Freundlich isotherms model， indicating that Sb（V） adsorption might be mainly involved in the multilayer and chemical adsorption. Sb（V） adsorption was mainly affected by a combination of the pH values， specific surface area and coexisting ions. According to the results of BET， SEM and TEM， 2-line ferrihydrite possessed the largest specific surface area and the highest adsorption capacity among the iron oxides. Coexisting oxyanions had a great impact on the adsorption of antimony， especially the phosphate. However， all the three kinds of iron oxides had a high removal efficiency of antimony in the actual printing and dyeing wastewater.