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以木炭作为载体,固载水合氧化铁,采用抽真空旋转蒸发法制备铁炭复合材料,通过比较不同制备条件下复合材料对水体中磺胺类抗生素的去除效果,对制备条件进行优化。并采用批量平衡试验,研究了铁炭复合材料对磺胺类抗生素的吸附去除特性。结果表明:以Fe(NO3)3溶液浸渍,铁炭质量比为0.224∶1,固化9 h条件下去除水体中磺胺类抗生素效果最佳;铁炭复合材料对磺胺和磺胺吡啶的去除效果明显优于单一炭材料,铁炭复合材料对磺胺和磺胺吡啶的去除率随抗生素初始浓度增加而降低,酸性条件下磺胺和磺胺吡啶去除率高于中性和碱性条件,溶液中背景离子强度变化对磺胺和磺胺吡啶的去除影响较小;铁炭复合材料对磺胺和磺胺吡啶的去除符合一级动力学模型,为物理化学吸附和化学降解的协同作用,且在反应过程中生成中间产物。
Charcoal was used as a carrier to immobilize hydrated iron oxide. Vacuum electrosorption was used to prepare ferrochromium composite material. The preparation conditions were optimized by comparing the removal efficiency of sulfonamide antibiotics in water under different preparation conditions. The batch equilibrium test was used to study the adsorption and desorption properties of iron-carbon composites for sulfonamides. The results showed that the removal of sulfonamides in water with Fe (NO3) 3 solution was the best when the mass ratio of iron to carbon was 0.224:1 and was cured for 9 h. The removal efficiency of sulfonamide and sulfapyridine by iron-carbon composite was better In a single carbon material, the removal rates of sulfonamides and sulfapyridine in Fe-C composite materials decreased with the increase of the initial concentration of antibiotics. Under acidic conditions, the removal rates of sulfonamide and sulfapyridine were higher than those of neutral and alkaline conditions, and the changes of background ionic strength in solution Sulfonamides and sulfapyridine removal less affected; Fe-C composite sulfonamide and sulfapyridine removal in line with the first-order kinetic model for the physical and chemical adsorption and chemical degradation synergies, and in the reaction process to generate intermediate products.