| 树脂基纳米钛锆氧化物复合吸附剂同步去除水中磷和氟 |
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| 引用本文： | 陈家凯,聂广泽,刘志英,姚远,徐炎华.树脂基纳米钛锆氧化物复合吸附剂同步去除水中磷和氟[J].环境科学,2017,38(5):1947-1956. |
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| 作者姓名： | 陈家凯 聂广泽 刘志英 姚远 徐炎华 |
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| 作者单位： | 南京工业大学城市建设学院, 南京 211800,南京工业大学环境科学与工程学院, 南京 211800,南京工业大学环境科学与工程学院, 南京 211800,南京工业大学环境科学与工程学院, 南京 211800,南京工业大学环境科学与工程学院, 南京 211800 |
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| 基金项目： | 江苏省高校自然科学研究计划项目（16KJA610002） |
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| 摘 要： | 以大孔强碱性阴离子交换树脂D201为基体,负载纳米钛、锆氧化物,制备新型树脂基纳米钛锆氧化物复合吸附剂TiZr-D201.通过吸附等温线实验、pH影响实验、竞争吸附实验、动力学实验及柱吸附实验,并结合对吸附剂的表征,探讨了复合吸附剂对水中磷和氟的吸附性能和相应的吸附机制.结果表明,当pH值为5.8,温度为308K时,Ti-Zr-D201对磷和氟的Langmuir拟合最大吸附容量分别是34.9 mg·g~(-1)和35.1 mg·g~(-1),且吸附行为是自发进行的,温度越高,吸附效果越好;与磷相比,pH值对Ti-Zr-D201吸附氟的影响更为显著;选取SO_4~(2-)、NO_3~-和Cl~-作为竞争离子,Ti-Zr-D201较基体D201表现出很好的抗干扰能力;内扩散模型拟合结果表明Ti-Zr-D201在吸附平衡前存在两个不同的吸附阶段;柱吸附实验表明Ti-Zr-D201具有稳定的结构和良好的动态吸附性能,并且可再生循环使用,具备实际应用的潜力.
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| 关 键 词： | 树脂基 复合吸附剂 钛氧化物 锆氧化物 除磷除氟 |
| 收稿时间： | 2016/11/4 0:00:00 |
| 修稿时间： | 2016/12/14 0:00:00 |
Performance of Polymer-based Titanium and Zirconium Oxides Composite Adsorbent for Simultaneous Removal of Phosphorus and Fluorine from Water |
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| CHEN Jia-kai,NIE Guang-ze,LIU Zhi-ying,YAO Yuan and XU Yan-hua.Performance of Polymer-based Titanium and Zirconium Oxides Composite Adsorbent for Simultaneous Removal of Phosphorus and Fluorine from Water[J].Chinese Journal of Environmental Science,2017,38(5):1947-1956. |
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| Authors: | CHEN Jia-kai NIE Guang-ze LIU Zhi-ying YAO Yuan and XU Yan-hua |
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| Institution: | College of Urban Construction, Nanjing Tech University, Nanjing 211800, China,College of Environmental Science and Engineering, Nanjing Tech University, Nanjing 211800, China,College of Environmental Science and Engineering, Nanjing Tech University, Nanjing 211800, China,College of Environmental Science and Engineering, Nanjing Tech University, Nanjing 211800, China and College of Environmental Science and Engineering, Nanjing Tech University, Nanjing 211800, China |
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| Abstract: | A novel composite adsorbent (Ti-Zr-D201) for simultaneous removal of phosphate and fluoride from water was prepared by loading nanosized titanium and zirconium oxides on the anion exchange resin named D201. Combining with the characterization of the adsorbent, adsorption isotherm experiments, effect of solution pH experiments, competitive tests, kinetic experiments and fixed bed column adsorption experiments were performed to explore the adsorption performance and mechanism. The maximum adsorption capacity of Ti-Zr-D201 for phosphorus and fluorine was 34.9mg·g-1 and 35.1mg·g-1 respectively, when the pH value was 5.8 and the temperature was 308K. Adsorption behavior was spontaneous, and higher temperature was favorable for phosphorus and fluoride adsorption. The effect of pH on the adsorption of fluoride was more significant compared with the adsorption of phosphorus. SO42-, NO3- and Cl- were selected as the competitive ions for competition experiments, and the results indicated that Ti-Zr-D201 exhibited favorable sorption selectivity for phosphorus and fluoride compared with the host material D201. The fitting results of the internal diffusion model showed that there were two different adsorption stages before the adsorption equilibrium of Ti-Zr-D201. Column adsorption experiments showed that Ti-Zr-D201 had a stable structure, excellent dynamic adsorption performance, and could be recycled, which showed the potential of practical application. |
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| Keywords: | polymer-based composite adsorbent titanium oxides zirconium oxides phosphorus and fluorine removal |
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