| 粒径对水合氧化镧除氟效果的影响 | |
| 王莉莉 ; 杨宏伟 ; 祝万鹏 ; 李振瑜 ; 刘文君 ; WANG Li-li ; YANG Hong-wei ; ZHU Wan-peng ; LI Zhen-yu ; LIU Wen-jun | |
| 2010-06-10 ; 2010-06-10 | |
| 关键词 | 水合氧化镧 活性氧化铝 除氟 粒径 hydrated lanthanum oxide(La_2O_3穘H_2O) activated alumina fluorine removal particle size X703 |
| 其他题名 | Influence of Particle Size on Fluoride Removal by La_2O_3穘H_2O |
| 中文摘要 | 针对La2O3.nH2O的高效除氟作用,确定了La2O3.nH2O除氟的最佳pH,在此基础上研究了La2O3.nH2O的粒径对其除氟容量以及除氟动力学的影响,并与活性氧化铝除氟效果进行了对比.结果表明:La2O3.nH2O除氟的最佳pH为5.5～6.5;La2O3.nH2O对氟的吸附基本符合Langmuir单分子层吸附原理;随着粒径的减小,其最大吸附容量及吸附速率均有明显的提高.试验中粒径为0.038～0.050mm的La2O3.nH2O与粒径为>0.500～0.710mm的La2O3.nH2O相比,前者的最大吸附容量是后者的3.32倍;当平衡ρ(氟)为1mg/L时,前者计算所得的吸附容量是后者的10.13倍.与活性氧化铝相比,当平衡ρ(氟)为1mg/L时,相同粒径的La2O3.nH2O的吸附容量是活性氧化铝的2.55～13.88倍.; The best pH range for fluorine removal using La_2O_3穘H_2O,and the influence of particle size on its defluorination capacity and dynamics were studied in this paper.On this basis,the defluorination capacity of La_2O_3穘H_2O was compared with activated alumina.The experimental results showed that:the best pH range of fluorine removal using La_2O_3穘H_2O was 5.5-6.5;the adsorption of fluoride on La_2O_3穘H_2O accorded with the Langmuir single molecular layer adsorption principle;and,the maximum adsorption capacity and adsorption rate were significantly improved with the particle size decreasing.In these experiments,the maximum adsorption capacity of La_2O_3穘H_2O with size 0.038-0.050 mm was 3.32 times as much as that with size >0.500-0.710 mm,and when the balance fluoride concentration was 1 mg/L,the calculated adsorption capacity of the former size was 10.13 times as much as that of the latter size.Compared with activated alumina,when the balance fluoride concentration was 1 mg/L,the capacity of La_2O_3穘H_2O was 2.55-13.88 times as much as that of activated alumina with the same particle size.; 国家“十一五”科技支撑计划项目(2006BAD01B02) |
| 语种 | 中文 ; 中文 |
| 内容类型 | 期刊论文 |
| 源URL | [http://hdl.handle.net/123456789/65933]  |
| 专题 | 清华大学 |
| 推荐引用方式 GB/T 7714 | 王莉莉,杨宏伟,祝万鹏,等. 粒径对水合氧化镧除氟效果的影响[J],2010, 2010. |
| APA | 王莉莉.,杨宏伟.,祝万鹏.,李振瑜.,刘文君.,...&LIU Wen-jun.(2010).粒径对水合氧化镧除氟效果的影响.. |
| MLA | 王莉莉,et al."粒径对水合氧化镧除氟效果的影响".(2010). |
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