纳米复合树脂NDA201-HZO吸附深度除As(Ⅴ)的试验研究

摘要：将金属氧化物负载到树脂基体孔道内形成的新型纳米复合吸附剂对砷酸根离子具有高吸附容量和吸附选择性。本试验采用阴离子交换树脂NDA201作为树脂基，负载水合氧化锆和水合氧化铁，制备成功纳米复合吸附树脂NDA201-HZO和NDA201-HFO，并对这两种纳米复合树脂的理化性质和除砷性能进行对比。实验结果表明，NDA201-HZO在静态吸附和动态吸附方面的除砷效果皆优于NDA201-HFO，说明纳米复合树脂NDA201-HZO吸附深度处理的工艺可以达到经济高效、无害化除砷的目的。70658

毕业论文关键词：纳米复合树脂，吸附，深度除砷

Abstract：the new nano composite adsorbent formed by loading metallic oxide into resin matrix channel has high adsorption capacity and absorptive selectivity for arsenate ion. In this experiment, anion exchange resin NDA201 is used as resin matrix, with hydrous zirconium oxide and hydrous ferric oxide loaded, nano composite absorbent resin NDA201-HZO and NDA201-HFO are prepared successfully, and comparison of physical and chemical properties and arsenic removal performance between those two kinds of nano composite absorbent resin is conducted. Experiment results show that the arsenic removal performance of NDA201-HZO is better than that of NDA201-HFO in both static adsorption and dynamic adsorption, indicating that the technology of adsorption deep professing of nano composite resin NDA201-HZO can achieve the goal of economical, efficient and harmless arsenic removal.

Keywords：Nano composite resin, Adsorption, Advanced removal of arsenic

1 绪论 5

1.1 研究背景 5

1.1.1 含砷矿冶废水的来源及危害 5

1.1.2 有色冶金行业砷污染现状 6

1.2 废水除砷技术研究进展 7

1.2.1 化学沉淀法 7

1.2.2 吸附法 8

1.2.3 膜分离法 8

1.2.4 离子交换法 9

2 课题研究目标和研究内容 9

2.1 研究目标 9

2.2 研究内容 9

3 纳米复合树脂深度除砷 10

3.1 深度除砷纳米复合树脂简介 10

3.2 材料与方法 10

3.2.1 两种纳米复合树脂的理化性质及表征分析 10

4.1 两种纳米复合树脂的除As(Ⅴ)动力学 11

4.2 两种纳米复合树脂除As(Ⅴ)的吸附等温线 13

4.3 平衡pH对纳米复合树脂除As(Ⅴ)性能的影响 14

4.4 硅酸根的存在对两种纳米复合树脂除砷As(Ⅴ)性能的影响 15

4.5 两种纳米复合树脂对含砷As(Ⅴ)模拟废水的柱吸附试验 15

5 纳米复合树脂对共沉淀出水的固定床吸附能力的考察 16

5.1 两种纳米复合树脂对共沉淀出水的柱吸附试验 16

结论 18

致谢 21

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