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纳米四氧化三铁吸附水中汞离子的研究
引用本文:成翠兰,毋伟,沈淑玲,陈建峰. 纳米四氧化三铁吸附水中汞离子的研究[J]. 北京化工大学学报(自然科学版), 2008, 35(3): 5-8
作者姓名:成翠兰  毋伟  沈淑玲  陈建峰
作者单位:北京化工大学 1. 纳米材料先进制备技术与应用科学教育部重点实验室;2. 教育部超重力工程研究中心, 北京 100029
摘    要:以纳米Fe3O4颗粒作吸附剂,研究其用量、粒径、吸附温度以及pH值等因素对Hg2+吸附效果的影响,考察了纳米Fe3O4颗粒对水中Hg2+的吸附性能,并对吸附结果的重现性和吸附机理进行了研究。结果表明:纳米Fe3O4颗粒对水中Hg2+的吸附去除率随其用量的增加、粒径的减小而增大;对Hg2+吸附的最佳温度为19℃、最佳pH值为3.5,此pH值不需要经过酸或碱调节,便于控制;实验的重现性良好;纳米Fe3O4颗粒吸附水中Hg2+以物理吸附为主。纳米Fe3O4颗粒对Hg2+的吸附符合Freundlich吸附方程,显示了很强的纳米效应,是一种具有较好应用前景的Hg2+吸附剂。

关 键 词:纳米四氧化三铁  汞离子  吸附  纳米效应  纳米四氧化三铁  汞离子  吸附  纳米效应
收稿时间:2007-11-02
修稿时间:2007-11-02

Adsorption of Hg2+ from water by nano-Fe3O4 particles
CHENG CuiLan,WU Wei,SHEN ShuLing,CHEN JianFeng. Adsorption of Hg2+ from water by nano-Fe3O4 particles[J]. Journal of Beijing University of Chemical Technology, 2008, 35(3): 5-8
Authors:CHENG CuiLan  WU Wei  SHEN ShuLing  CHEN JianFeng
Affiliation:1. Key Laboratory for Nanomaterials, Ministry of Education; 2. Research Center of the Ministry of Education for High Gravity Engineering and Technology, Beijing University of Chemical Technology, Beijing 100029, China
Abstract:The adsorption properties of Hg2 on nano-Fe3O4 particles have been studied and the effects of varying the dosage,particle size,temperature and pH on the adsorption process investigated.The reproducibility of the adsorption process and the adsorption mechanism were also studied.It was found that the removal ratio of Hg2 increased with increasing dosage of nano-Fe3O4 particles.The adsorption effects also increased with decreasing particle size,and were enhanced at low temperature,showing that physical adsorption was involved. The optimal pH value was found to be 3.5,which is conveniently obtained without adjustment by addition of acid or alkali being required.The adsorption showed good reproducibility and was consistent with the Freundlich equation.The significant nano-effects observed suggest that the nano-Fe3O4 is a promising adsorbent for Hg2 .
Keywords:nano-Fe3O4  Hg2   adsorption  nano effect
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