铁炭复合材料对水体中SAs吸附去除性能的研究

发布时间：2018-08-13 15:28

【摘要】：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。
[Abstract]:The iron-carbon composite was prepared by vacuum rotation evaporation with charcoal as carrier and supported on hydrated ferric oxide. By comparing the removal efficiency of sulfanilamide antibiotics in water under different preparation conditions, the preparation conditions were optimized. The adsorption and removal of sulfanilamide antibiotics by iron carbon composites were studied by batch equilibrium test. The results show that when Fe (NO3) 3 solution is impregnated, the ratio of iron to carbon is 0.224: 1, and the curing time is 9 h, the removal efficiency of sulfanilamide and sulfamyridine in water is the best, and the removal efficiency of iron carbon composite is better than that of single carbon material. The removal rate of sulfanilamide and sulfampyridine decreased with the increase of the initial concentration of antibiotics, and the removal rate of sulfaniline and sulfamyridine in acidic condition was higher than that in neutral and alkaline condition. The removal of sulfanilamide and sulfampyridine by iron-carbon composites was in accordance with the first-order kinetic model, which was the synergistic effect of physicochemical adsorption and chemical degradation. And the intermediate product is formed in the reaction process.
【作者单位】：安徽农业大学资源与环境学院;安徽农业大学生物技术中心;农田生态保育与污染防控安徽省重点实验室;
【基金】：国家自然科学基金(41471405) 农田生态保育与污染防控安徽省重点实验室开放基金资助项目(FECPP201705)
【分类号】：TQ424;X52

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