| 海绵负载纳米Al2O3复合吸附剂去除水中硒研究 |
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| 引用本文： | Liza Yu Chen LIN,何柳,刘通,王小.海绵负载纳米Al2O3复合吸附剂去除水中硒研究[J].水处理技术,2020,46(1):17-21. |
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| 作者姓名： | Liza Yu Chen LIN 何柳 刘通 王小 |
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| 作者单位： | 东北林业大学林学院,黑龙江哈尔滨150040;清华大学环境学院,环境模拟与污染控制国家重点联合实验室,北京100084;中国检验检疫科学研究院食品安全研究所,北京100176;清华大学环境学院,环境模拟与污染控制国家重点联合实验室,北京100084;美国宾州州立大学州府学院环境系,宾州17057 |
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| 基金项目： | 十三五水专项(2017ZX07501-002) |
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| 摘 要： | 研究制备了海绵负载纳米Al2O3微球的复合吸附剂(NAS),并用于对Se(Ⅳ)和Se(Ⅵ)的吸附。结果表明,合成的纳米Al2O3微球(NAO)的平均尺寸为200~400 nm,在海绵上负载NAO会使其分散性更好。当NAO负载量分别为80 mg/g和60 mg/g时,NAS对Se(Ⅳ)和Se(Ⅵ)的吸附性能为佳,分别需要60、120 min达到平衡,适应pH为2~5;两者均符合准2级动力学模型;NAS对Se(Ⅳ)、Se(Ⅵ)的最大吸附容量分别为137.2、143.9 mg/g,能很好地与Freundlich模型拟合,说明NAS表面不均匀,且属于多层吸附。经过2次的循环,对Se(Ⅳ)和Se(Ⅵ)的去除率有所降低,但均仍保持在一定的水平,说明NAS可再生循环利用。NAS作为一种新型吸附剂去除水中Se具有较好的应用前景。
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| 关 键 词： | 纳米Al2O3微球 海绵 负载 复合吸附剂 吸附 硒 |
Study on Nano-Al2O3 Supported on the Sponge（NAS） Composites for Selenium Removal from Water |
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| Liza Yu Chen LIN,HE Liu,LIU Tong,WANG Xiaomao,CHEN Xiangwei,XIE Yuefeng.Study on Nano-Al2O3 Supported on the Sponge（NAS） Composites for Selenium Removal from Water[J].Technology of Water Treatment,2020,46(1):17-21. |
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| Authors: | Liza Yu Chen LIN HE Liu LIU Tong WANG Xiaomao CHEN Xiangwei XIE Yuefeng |
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| Affiliation: | (School of Forestry,Northeast Forestry University,Harbin 150040,China;State Key Joint Laboratory of Environment Simulation and Pollution Control,School of Environment,Tsinghua University,Beijing 100084,China;Institute offood safety,Chinese Academy of Inspection and Quarantine,Beijing 100176,China;Environmental Engineering Programs,The Pennsylvania State University,Middletown,PA 17057,USA) |
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| Abstract: | Nano-aluminum oxide supported on the sponge composites(NAS)were synthesized and applied for Se(IV)and Se(VI)removal from water.The results indicated that the average diameter of the nano-Al2O3(NAO)was 200-400 nm and the NAO were dispersed well on the surface and pore channels of the sponge.When NAO loading was 80 mg/g and 60 mg/g,the maximum adsorption of Se(IV)and Se(VI)could be obtained in 60 min and 120 min respectively,the suitable pH was 2-5,the pseudo-second-order kinetic model fitted both the adsorption kinetics well.Maximum Se(IV)and Se(VI)adsorption capacity by NAS was 137.2 mg/g and 143.9 mg/g respectively,it fitted well with Freundlich model and showed that the surface of NAS was heterogeneous and it was multi-layer adsorption.After two cycles,the removal rates of Se(IV)and Se(VI)decreased,but both remained at a certain level,indicating that NAS could be recycled and reused.NAS as a promising adsorbent has a well application prospect for Se(IV)and Se(VI)removal in water. |
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| Keywords: | nano-Al2O3 sponge load composite adsorbent adsorption Se |
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